Null


TRW pistons L2443N +30

  • 49 Replies
  • 21042 Views

LakesOnly

  • Join Date: Mar 2007
  • Location: San Francisco Bay Area
  • *
  • Hero Member
  • *****
  • Posts: 521
  • 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: 521
  • 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: 521
  • 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: 521
  • 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: 521
  • 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: 521
  • 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: 521
  • 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: 521
  • 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