Null


TRW pistons L2443N +30

  • 49 Replies
  • 20945 Views

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« on: May 07, 2009, 08:00:14 PM »
I picked up a short block today with about 200 miles on it.   ;D   The pistons, bores etc look like new and it's balanced  ;D.  My question is what are the specs on these old slugs?   

The guy said they should give me 10:5 CR with my Edelbrock 95CC heads.

They should be from around 1996.   The engine was in a,,, ready?  Mercury Capri.   It was
a sunday driver and he upgraded to a stroker engine.  That thing must FLYYYYY.  He said it ran high
9's in the quarter.   I'm surprised it didn't twist the car in half 

Any help on the info will be greatly appreciated.




Null


IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #1 on: May 07, 2009, 08:13:58 PM »
Exact pistons I'm running Dave, save mine are .040 and I dunno what the 'N" means, but sounds about right. With my heads I'm getting about 11.5 or so to one, from what the machinist told me. (Started out running only 93 octane, but 91 seems ok, no detonation as yet). I really think though with 95cc heads your much closer to 10:1 or less, maybe Paul or Ralph will know more on this.

Ray

Edit: Oh, and they're forged, but you prolly already knew that.
« Last Edit: May 07, 2009, 08:16:16 PM by IRRebel »
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #2 on: May 07, 2009, 08:18:52 PM »
Do you know if the rings the standard size (width)  for the ford pistons?  With TRW out of business
I'd hate to try to find a set of their rings.

The seller told me he had about 13:1 CR with his cobra jet heads?  Do you know what CC dome they have? 

I don't know much about the pistons but a balanced short block looking like new.. $300 bucks.  I didn't ask many questions.  It was torn down so I could check the crank, pistons and cylinders.   I'm still
smiling.  He was just going to sell the crank, rods and pistons (still on the rods) but I got the block too.

Anyone know if someone took over TRW or did they just die out?
Thanks Ray.
« Last Edit: May 07, 2009, 08:25:04 PM by electrowoman »

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #3 on: May 07, 2009, 08:24:39 PM »
Dunno who, if anyone,  bought them out, (hadda be someone),  but my pistons were bought brand new 4 months ago from Summit! Standard groove/land size, but we used Speed Pro Moly rings on mine (Loosed up a bit on the gap size given a marine engine).

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #4 on: May 07, 2009, 08:25:56 PM »
I'll call summit in the morning.  You're a life saver Ray!

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #5 on: May 07, 2009, 08:29:47 PM »
same pistons i have in my liberty except i have the dome milled off.
0-decked block and d3 heads  10.5 to1

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #6 on: May 07, 2009, 08:35:38 PM »
Quote
You're a life saver Ray

You've obviously never ridden with me, lol

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #7 on: May 07, 2009, 08:40:39 PM »
Well ok not a life saver but you guys have been a god send when I got in trouble.
I'm the only jet boater in the area, unless you count those lake lice.

With out your help I would really have struggled.

Thank you all!

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #8 on: May 07, 2009, 08:44:16 PM »
same pistons i have in my liberty except i have the dome milled off.
0-decked block and d3 heads  10.5 to1

Ralph is right in line with my math too. Should be fine with the Eddy heads at less than 10:1 with no milling.

SCJ heads had only something under 35cc I think, could be wrong. Mine are, I beleive, 73cc. Again, Ralph would know more than me, but I can say 91 octane with my 73cc heads with unmilled slugs runs fine on 91 octane. ('tis how I judge compression anyway, no detonation, and no pinging or run on).

So I beleive you're golden, and GREAT FIND, those slugs go for a lot more than that!

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #9 on: May 07, 2009, 08:47:58 PM »
Well ok not a life saver but you guys have been a god send when I got in trouble.
I'm the only jet boater in the area, unless you count those lake lice.

With out your help I would really have struggled.

Thank you all!


Still coming back there (youngstown, ohio), for a wedding in October, whatsay I forgoe the plane trip and tow the Moo boat and we hit the Rivers?, lol ( I wanna roost the Fountain at the Point SOOOOOO bad)

Then you'll know what we're all about, comraderie.

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #10 on: May 07, 2009, 08:50:28 PM »
i think your riding the borderline for pump gas ??? do the math before you install. the only saving grace you have is the aluminum heads, i would not even think about running those with iron heads and pump gas. your tune up will have to be dead on all the time. or  you guessed it DETONATION

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #11 on: May 07, 2009, 09:01:41 PM »
See? told you, Ralph knows a TON more than me, like an encyclopedia with a slide rule, and off the top of his head!.

My saving grace is the rainbirds I have fueling the thing and the tunnel ram, I think. Cools the charge down a bit. But your heads are 1/3 bigger than mine in CC volume AND aluminum. I would run it, but that's just me. Just make sure you only run premium in it.

I think you'll make big power from that, with the right cam, so be forewarned!

Ray

Wait a minute, just thought of this, Ralph, does the N mean something different than mine are?
« Last Edit: May 07, 2009, 09:07:19 PM by IRRebel »
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

HDriderTH

  • Join Date: Nov 2006
  • Location: Las Vegas Nevada
  • *
  • Informative Member
  • *******
  • Posts: 3,525
  • Karma: +12/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #12 on: May 07, 2009, 09:39:42 PM »
I think you want the "N" facing north when you install them.... ::)

'82 Sanger Bubble deck, Blown 454....V-drive

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #13 on: May 07, 2009, 10:00:01 PM »
North it shall be my friends  ;)

HP is addictive isn't it.   ::)

Oh I forgot,  Ralph what do you think the CR will be?  The block is decked
(no info on what they cut)   the heads are 95CC stock stroke.

 I have no clue on the dome and that stops me dead in my tracks.  I could only go by what
the seller told me.   10:5
« Last Edit: May 07, 2009, 10:03:40 PM by electrowoman »

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #14 on: May 07, 2009, 11:31:15 PM »
I think you want the "N" facing north when you install them.... ::)

What took you so long Terry? lol

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #15 on: May 08, 2009, 06:52:05 AM »
thanks for the kind words guys ;)

i think the cr is going to be around 11-4 to1

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #16 on: May 08, 2009, 06:56:40 AM »
That's steeper than I thought.  Do you think I'll be ok with the aluminum heads on pump gas?
I'm not interested in racing fuel...

Do you guys know where I might find the factory info for these pistons?  Specifically the dome size

I can't find anything about them.   What does the N mean?

I just checked summit for these since Rebal got his there.  The number is the same but they
added an F  at the rear.  I wonder if they are the same.  According to their specs it's 10.55 CR
with a 92cc chamber.

« Last Edit: May 08, 2009, 07:12:45 AM by electrowoman »

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #17 on: May 08, 2009, 09:19:22 AM »
That's kinda why I questioned the N. Mine had no letter at all that I recall. Not gonna pull the heads to find out either, lol. Could just be the die number used to forge them?? damifiknow.

An F at the rear means they're Omars' pistons.

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

beerjet

  • Join Date: Nov 2006
  • Location: Rancho cucamonga
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 9,102
  • Karma: +81/-0
    • View Profile
  • Liked:
  • Likes Given: 22
« Reply #18 on: May 08, 2009, 09:44:39 AM »
Email these guys with your info

http://www.flatlanderracing.com/home.html

I looked through their list of pistons and I'm pretty sure they arent available anymore but they might still have the info on them.

-beerjet-
i dont but im all for stuffin shit in her ass to make her go away :-*

beerjet

  • Join Date: Nov 2006
  • Location: Rancho cucamonga
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 9,102
  • Karma: +81/-0
    • View Profile
  • Liked:
  • Likes Given: 22
« Reply #19 on: May 08, 2009, 09:57:42 AM »
That's kinda why I questioned the N. Mine had no letter at all that I recall. Not gonna pull the heads to find out either, lol. Could just be the die number used to forge them?? damifiknow.

An F at the rear means they're Omars' pistons.

Ray
Lettering at the end of the part numer.
"F" denotes a "flat top" piston  :sly: Ray........
"D" denotes "dish" type piston
"L" at the front of the part number denotes a forged piston
Couldnt figure out for the life of me what the "N" at the end means  :banghead:

-beerjet-
i dont but im all for stuffin shit in her ass to make her go away :-*

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #20 on: May 08, 2009, 10:11:47 AM »
Wow, knew you knew everything about boat hulls, etc, but pistons too? You never cease to amaze me Omar

;D

Now I need Tommy's SWAT probe cam to see exactly what I put in there. Was supposed to be 10.5:1 with my heads before the milling and shoulda come up at around 10.7 or so to 1. Still high, but useable.

Still not at 11.5 or so, else it'd say Ping more often than the Chinese phone book.

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #21 on: May 08, 2009, 05:44:36 PM »
I sent off an email to Flatlander racing.   I'll let you know if I hear from them.
Thanks for the imput guys

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #22 on: May 08, 2009, 06:12:54 PM »

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #23 on: May 08, 2009, 07:34:00 PM »
I picked up a short block today with about 200 miles on it.   ;D   The pistons, bores etc look like new and it's balanced  ;D.  My question is what are the specs on these old slugs?   

The guy said they should give me 10:5 CR with my Edelbrock 95CC heads.

They should be from around 1996. 

Any help on the info will be greatly appreciated.
TRW got out of the piston biz in 1996. They sold the tooling to Federal Mogul, who now offers the TRW line under their Speed-Pro piston line.  So today, these TRW L2443 pistons are sold as Speed Pro L2443 pistons.

But between 1995 and today, there have been several revisions to the L2443 piston design by Federal Mogul (one of which I instigated), and the L2443 piston that Speed Pro offers today will not directly match the pistons in the shortblock that you purchased.  But there can be situations where the newest revision might be used with the older design piston that you have.

Changes over the years include: shortening the skirt tang; changing the wrist pin clip groove design (and the clip that is used); overall configuration & finish, possibly the valve pocket depth, possibly the dome volume, to name a few.

There are a lot of variables to consider when determining compresison ratio, including which L2443's you have, as well as chamber volume, deck height, etc. Based on the info you provided in this thread, I'd guess you are well over 11:1 and possibly approaching 11.5:1 compression ratio.

LO

We're on the web; click below:
High Flow Dynamics

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #24 on: May 08, 2009, 07:41:55 PM »
And Paul, do you know what the "N" means"? we're dying to know.

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #25 on: May 08, 2009, 07:44:40 PM »
.... I dunno what the 'N" means...
The "N" in these pistons means that the crown is Not flat. Hence, L2443NF-030

.... (Started out running only 93 octane, but 91 seems ok, no detonation as yet).
Are you sure??? Be sure to do spark plug readings and jet on the rich side; these pistons promote inaudible detonation in the 460 due to their peaked dome-top design. Further, the intake valve relief is cause for the ring land to get really thin near the top ring,  thereby creating a hot spot....and so this is where the L2443's melt first:



I really think though with 95cc heads your much closer to 10:1 or less...
Think again.... ;)

LO

We're on the web; click below:
High Flow Dynamics

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #26 on: May 08, 2009, 07:48:08 PM »
Do you know if the rings the standard size (width)  for the ford pistons?  With TRW out of business
I'd hate to try to find a set of their rings.
They use a standard 5/64" ring package. I recommend the Speed Pro plasma-moly ring set.

The seller told me he had about 13:1 CR with his cobra jet heads?  Do you know what CC dome they have? 
13.25:1 is about right, zero deck the block and you get 13.5:1 nwth D0OE-R SCJ heads. The dome on your 1996 pistons is advertised at 12.1 cc's.

We're on the web; click below:
High Flow Dynamics

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #27 on: May 08, 2009, 07:50:47 PM »
same pistons i have in my liberty except i have the dome milled off.
0-decked block and d3 heads  10.5 to1
Ralph either we had a mis-communication or I had a brain fart; your shortblock is 9.65:1 with D3Ve's or 11.6:1 with early-style heads.

We're on the web; click below:
High Flow Dynamics

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #28 on: May 08, 2009, 07:58:13 PM »
Mine did NOT have a dome on them, they were flat tops, looking kinda like what Dave posted the pics of, not the pic you posted. But cannot confirm the letter on them. Thanks Paul! As always, you know the answer. I guess I really need to look in there with the Tommy Cam and see just what I did put in.

A few people on this site have seen it run and run flawlessly were it not for driver intervention.

Forgive me this tho Paul, would it not run on, backfire if too high compression, occassionally? Just thinking out loud.

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #29 on: May 09, 2009, 03:01:57 AM »
How much do you think would need to be milled off the dome to land 10:5 CR?

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #30 on: May 09, 2009, 05:26:24 AM »
Ralph either we had a mis-communication or I had a brain fart; your shortblock is 9.65:1 with D3Ve's or 11.6:1 with early-style heads.
my heads are milled

i am getting 10.393 ???

duh :-[ forgot to put in the valve relief -3 cc's  9.870
« Last Edit: May 09, 2009, 06:17:53 AM by Ralph Brunt »

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #31 on: May 09, 2009, 06:28:04 AM »
im getting 11.307 with the 12.01 cc dome and 0 deck

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

Ralph Brunt

  • Join Date: Nov 2006
  • Location: long beach, ca
  • *
  • Team Member
  • Informative Member
  • *******
  • Posts: 5,343
  • Karma: +51/-0
  • river time
    • View Profile
    • http://www.socaljetboats.com/cpg/albums/userpics/10041/normal_SCSCseasonopener3_4_07-4_184_edited.jpg
  • Liked:
  • Likes Given: 3
« Reply #32 on: May 09, 2009, 06:34:28 AM »
elecrowoman, use the calculator in the link and put these #'s
http://www.brcperformance.com/enginecalc.htm
bore 4.39
stroke 3.85
cyl head cc's 95
deck 0
head gasket 0.039
piston net volume 12.01

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
Quote
They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #33 on: May 09, 2009, 07:16:53 AM »
The way I see it I'll have to check the deck heigth when I get the block back.
That is the one variable I don't have the answer to for sure at this time.

 It's out for cambearings, hone and super clean...  we'll see.   :sly:

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #34 on: May 11, 2009, 12:51:05 PM »
How much do you think would need to be milled off the dome to land 10:5 CR?
Assuming a true 95 cc combustion chamber volume, your particular pistons set 0.005" below deck at TDC, a Fel-Pro 1018 head gasket: mill the dome down until you have about 0.100" of dome pleateau remaining. That should be approximately 10.5:1 c/r. You should also understand that at 10.5: 1 c/r, your quench distance plays a far more important role in minimizing detonation than does the c/r itself.

LO

p.s. Beware that the intake valve pocket in your L2443's are for the standard passenger car 2.08" valve head diameter.

We're on the web; click below:
High Flow Dynamics

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #35 on: May 11, 2009, 06:13:59 PM »
The seller was running scj aluminum heads with a wicked roller cam.  I'm just running
the edelbrock rpm heads.

Do you think they will be ok?

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #36 on: May 13, 2009, 06:07:26 AM »
Well this problem is solved.   The engine had 3 stiff piston rod assemblies so I took them along with the block to be fixed. 

There is at least one bad piston now, the machinest said it really popped when it finially broke loose.
There was no sign of breakage but he said he wouldn't trust it.  I trust him so I won't either.

I ordered a new set of L2443NF30 pistons form Jegs.

I'll keep the others for a spare motor I'll build with pop ups if I can find a match or just sell
these if someone else needs them. 

According to the specs for the above pistons the CR will be very near 10:5:1

Here's something I thought was interesting.   The machinest was going to buy the pistons at his price to help me out.
He's a dealer of theirs. 

 His price was $10.00  HIGHER each,  than I got them for from Jegs.  INCLUDING
shipping.  It would have been $10.00 each $80.00 higher plus shipping.

They said due to the economy being so bad places like Jegs and Summit are dumping their items like this for
what they paid for them.

 Don't know if it's true about them but it was interesting.

« Last Edit: May 13, 2009, 04:36:54 PM by electrowoman »

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #37 on: May 23, 2009, 02:27:08 PM »
The pistons came in and we're getting the final parts needed for the build.   The pistons came
with NO info on ring gap etc?   What final bore clearance should we shoot for and what ring gap?

What ever happened to "this is what we made and this is best how to set it up"?

GT Jets

  • Join Date: Jan 2007
  • Location: Morgan Hill CA
  • *
  • Informative Member
  • *******
  • Posts: 11,752
  • Karma: +192/-0
  • Team Evil Weiner
    • View Profile
  • Liked:
  • Likes Given: 138
« Reply #38 on: May 23, 2009, 02:38:21 PM »
The pistons came in and we're getting the final parts needed for the build.   The pistons came
with NO info on ring gap etc?   What final bore clearance should we shoot for and what ring gap?

What ever happened to "this is what we made and this is best how to set it up"?

Did you buy rings that require grinding?, IMHO that does not happen too often anymore, if you over bore the cylinders, the gap will be larger than intended unless you buy GTF (grind to fit) rings.  :sly:

As far as the piston to wall clearance, it's a Ford and this "Bowtie Guy" will leave that one alone... ;)

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

HDriderTH

  • Join Date: Nov 2006
  • Location: Las Vegas Nevada
  • *
  • Informative Member
  • *******
  • Posts: 3,525
  • Karma: +12/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #39 on: May 23, 2009, 03:47:49 PM »
I usually go .005 over on the ring w/ forged pistons because of the extra clearence required. Ex. .030 pistons- .035 rings. I do this because every one thou you enlarge the bore, you open the ring gap Pi (3.147) so for .003 extra clearence you've opened the ring gap .010 or so. As  rule go .003- .004 per inch of bore. IMO

'82 Sanger Bubble deck, Blown 454....V-drive

dano670

  • Join Date: Aug 2010
  • Location: OK
  • *
  • Newbie
  • *
  • Posts: 2
  • Karma: +0/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #40 on: August 16, 2010, 10:18:36 AM »
New to the forums, rather than post a whole new thread, this one was the first to come up.

I ended up with a set of these pistons, but there is combination of the old TRW (7) and 1 of the Federal Mogul.  Does anyone know if you can combine sets of these?

The TRW are labeled L2443 .030 and the Federal Mogul are L2443NF .030.



dano670

  • Join Date: Aug 2010
  • Location: OK
  • *
  • Newbie
  • *
  • Posts: 2
  • Karma: +0/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #41 on: August 16, 2010, 07:58:01 PM »
Well after close examination, unless you want to remove material from the skirt of the TRWs, I don't think mixing them is a good idea.

Weight of TRWs is 927 grams to the Federal Mogul's 911


electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #42 on: August 16, 2010, 08:28:09 PM »
These guys and the one's at the 460 forum told me not to use them.   I already had them so in they went.  They worked all summer till the last run when we leaned on it pretty hard to beat a storm down the lake.
I had the timing up to 38 degrees total.   This is the result.   It now has probe flat tops.
« Last Edit: August 17, 2010, 06:33:37 AM by electrowoman »

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #43 on: August 20, 2010, 10:50:04 AM »


The un-coated piston on the left is an original TRW-style piston.  It has square cut pin clips and is made from a different slug forging and a better material than the one on the right.

The coated piston on the right is a Speed Pro version L2443, has round-wire pin clip grooves, a smaller dome, reduced skirt tang reach, etc.

Aside from the deeper skirt tangs, I have a personal preference for the pistons style on the left; the new Speed Pros are currently made in India and quality control is in the toilet.  Incidentally, there is a version of the L2443 piston like the one on the left and which also has the shortened skirt tangs.

Well after close examination, unless you want to remove material from the skirt of the TRWs, I don't think mixing them is a good idea.

Weight of TRWs is 927 grams to the Federal Mogul's 911
Depending on application, the two pistons shown in your picture can be made to be used together in a set of eight. It is not ideal but it is possible...depends on the rest of your build. Also, it may be possible to find the correct pistons that you need in order to complete a full set of 8 that are all the same piston revision.

NOTE: cutting down the deeper skirt is not a wise idea because pistons are cam-ground and the skirt dims are spec'd in a specific area of the pistons...correct cylinder-to-bore clearance is impacted and excessive piston rock may result.  Again, might be possible but you really need to know what you're doing.

LO

We're on the web; click below:
High Flow Dynamics

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #44 on: August 20, 2010, 10:52:12 AM »
I ended up with a set of these pistons, but there is combination of the old TRW (7) and 1 of the Federal Mogul.  Does anyone know if you can combine sets of these?

The TRW are labeled L2443 .030 and the Federal Mogul are L2443NF .030.
Either find an eighth TRW version, or weight match within reason. How much HP are you targeting?

LO

We're on the web; click below:
High Flow Dynamics

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #45 on: August 21, 2010, 09:15:59 AM »
New to the forums, rather than post a whole new thread, this one was the first to come up.

I ended up with a set of these pistons, but there is combination of the old TRW (7) and 1 of the Federal Mogul.  Does anyone know if you can combine sets of these?

The TRW are labeled L2443 .030 and the Federal Mogul are L2443NF .030.




I would have given you my old trw pistons for the shipping but mine have the N which is anoher revision from yours.   I have 6 of the  L2443NF .030  if you want them I'll sell for $100.00 delivered.  They are boxed up in the garage not laying around.

IRRebel

  • Join Date: Dec 2008
  • Location: Casa Grande, Arizona
  • *
  • Informative Member
  • *******
  • Posts: 5,635
  • Karma: +16/-0
    • View Profile
  • Liked:
  • Likes Given: 12
« Reply #46 on: August 21, 2010, 07:49:25 PM »
New? I'm confused ......not unusual though...... I need 1 also (TRW version).

Ray
"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

electrowoman

  • Join Date: May 2008
  • Location: Pa
  • *
  • Hero Member
  • *****
  • Posts: 569
  • Karma: +1/-0
    • View Profile
  • Liked:
  • Likes Given: 0
« Reply #47 on: August 21, 2010, 08:25:45 PM »
No, not new.  They have about 4 hours run time.   

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #48 on: August 23, 2010, 02:44:26 PM »
Guys,

I think there are about 3 different L2443 revisions (= 4 different L2443 piston styles) over the years.  Before you all start shipping each other random pistons, it might be wise to start a new thread called "L2443 Revisions" where you each take pictures of your pistons and note the quantities of each version that you have.  Next to the piston image, specify skirt length (skirt-to-piston crown), dome height, square cut pin clip grooves or round cut pin clip grooves, piston weight/pin wieght, coated or not, etc.

Without doing this, people will end up with more mix-matched sets of 8, rather than equally/identically configured sets of 8.

LO

We're on the web; click below:
High Flow Dynamics

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 520
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 2
« Reply #49 on: August 23, 2010, 02:53:50 PM »


I have a brand new never used set of 8 true TRW L2443 dome tops (like those on the left-hand side in the above picture), complete with piston pins, Tru-Arc snaprings, all TRW paper work.  $440 shipped anywhere in the U.S.  Summit Racing wants the same amount for the crappy L2443's shipped. The original cardboard pistons box is yellowed but hey it's an original set what do you expect?   ;)

I'll post pics if someone starts the other thread.

LO

We're on the web; click below:
High Flow Dynamics

 


Website Security Test
Powered by EzPortal

Null

Website Security Test