Piston swapping

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2savage4you

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« Reply #25 on: May 07, 2008, 09:55:50 AM »
;D ;D ;D

I say f' it and just run it, that boats gonna haul ass no matter what you do, later you find the inside wisdom of horsepower grasshopper  ;D


Thats funny.
2sav


GlassCutter

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« Reply #26 on: May 07, 2008, 10:31:07 AM »
In my nearly 30 years of boat ownership I have never had a boat that would run faster than 50 mph.  It did pull up 5 skiers at once tho.  It continues to run trouble free with over 500 hours.  Oil has been changed very seldom. Cavitated and redlined often cuz that's what stupid teen drivers do.  Its a gas sipper to boot!   400 SBChevy doesn't get the rep it deserves.  No one EVER complained we didn't go fast enuf.  No one EVER said they didn't have fun enuf.  Put a bunch of chrome on it if it make you feel better but git it done.  Gas ain't getting any cheaper  :mad:
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« Reply #27 on: May 07, 2008, 10:42:21 AM »
Also, if you are worried about keeping it alive - don't run it lean, keep the timing conservative, and it will last a long time.

99% of every vehicle on the road today came with cast pistons, even the new hemi's (6.1's excluded), and those can take quite a bit of abuse and make a ton of HP.

And if your boat "only" does 50 MPH - so what. Are you going there to race or to have a good time? For me, I'm pretty sure my kids can't ski behind me at 50 MPH - or 40 - or 25 for that matter.

Growing up, our boat could only do 45 MPH, and that was way faster than any of us could handle skiing behind it.



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2savage4you

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« Reply #28 on: May 07, 2008, 10:58:29 AM »
Ok im going ahead with the build, now i have done some researching and even if i change my cam i have to match it with  springs or it is a waiste of time eventually i will flatten the cam or worse float/suck a valve.

So i have another set of better flowing heads with the same size valves in my peanut heads, see were im going with this? I need to match the springs to the cam, i found everything i need @ Summit ;D
Cant i just take out my valves and swap them over to the other heads, yes i know another valve job is required... But it would give me better flow and i would not have to worry about building another engine for awhile......bigger flowing heads and a better intake.... I can do this and get it ready in about a month..
2sav

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« Reply #29 on: May 07, 2008, 11:31:07 AM »
Only if you are running a loose impellor. If you are running an A2 or something, you'll probably slow it down. Increased flow helps at the upper RPM, hurts at the lower RPM. So, depending on what you are running for the ret of the combo, it might be better to use the good intake with the small port heads.
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2savage4you

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« Reply #30 on: May 07, 2008, 11:39:18 AM »
Only if you are running a loose impellor. If you are running an A2 or something, you'll probably slow it down. Increased flow helps at the upper RPM, hurts at the lower RPM. So, depending on what you are running for the ret of the combo, it might be better to use the good intake with the small port heads.


Im running a "B" cut impeller  so im thinking i need the rpm's as high as i can get em..

2sav

speedymopars

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« Reply #31 on: May 07, 2008, 01:28:24 PM »
In that case run the bigger heads unless it will take all summer to finish it.   ;D
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Jason1978nordic

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« Reply #32 on: May 08, 2008, 02:21:48 AM »
valve job is easy ,if you want the same springs summit sells as house brand search e bay for falcon global they are in florida and sell complete kits spring retainers and keeper packs for cheap I use alot of their stuff and have never had a problem,sure you can swap valves as long as you have the same size valve stems some of the peanut heads used on trucks and heavy duty apps had sodium filled stems and are bigger than conventional valve stems thats the only difference there one is 5/16 the other is 3/8 stem. if you want specific info pm me I am a long time head porter and have tons of stuff laying around.....piston swapping 454 are factory externally balanced the main difference between the cast and forged pistons is the clearance forged pistons grow more than cast and a hell of alot more than those hyperpathetic pistons as I like to call them a cast piston is about 80 grams less than a forged and I wont even compare to the hyperpathic the forged piston is denser than the cast and will stand up to way more abuse ie...pre ignition and or detonation as well as extreme rpm and lean jetting ,the cast piston cylinder wall clearance is about 1and a half thou to about three thou while the forged is 3 and a half to up to six thou sometimes more cast will live a happy life without mondo rpm and excessive timing also lean is mean so watch the jetting of the carb and you will be fine hope this helps..........

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« Reply #33 on: May 08, 2008, 04:56:24 PM »
I think cast pistons are a good choice for what you are doing. :)
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2savage4you

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« Reply #34 on: May 08, 2008, 05:04:23 PM »
I think cast pistons are a good choice for what you are doing. :)


Well were going to find out... 429heads is going to do up my spare set of heads real nice for me. So now im going to have more flow with bigger ports and SS valves , should i ditch the performer intake now?
Hhhmmm.

2sav

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« Reply #35 on: May 09, 2008, 12:46:06 AM »

Well were going to find out... 429heads is going to do up my spare set of heads real nice for me. So now im going to have more flow with bigger ports and SS valves , should i ditch the performer intake now?
Hhhmmm.

2sav

Hey Steve, time to pull that bottom end apart and find out if everything's cool down there. I just took mine down tonight to freshin up before Parker and didn't like what I had seen..... yea I know, MORE work  :banghead:

2savage4you

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« Reply #36 on: May 09, 2008, 11:57:43 AM »
Hey Steve, time to pull that bottom end apart and find out if everything's cool down there. I just took mine down tonight to freshin up before Parker and didn't like what I had seen..... yea I know, MORE work  :banghead:


Yeah i was thinking the same thing but, i dont have no calipers or doo hicky's or even any thingy ma bobs to check it with ;D

I have a feeling my clearance's wont be right and i will have to tear it all down and do it over....If thats the case,new pistons will be in order ;)

Im beginning to hate being a boat owner :banghead:  Its like paying for something you cant even use :screwy:

2sav

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« Reply #37 on: May 09, 2008, 12:27:49 PM »
if the bearing clearances are not right you can get .001 over or under from king bearing

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« Reply #38 on: May 09, 2008, 01:09:05 PM »
Hey Steve, time to pull that bottom end apart and find out if everything's cool down there. I just took mine down tonight to freshin up before Parker and didn't like what I had seen..... yea I know, MORE work  :banghead:

I say unless you hear a knockin, or your oil pressure is 20lb at 6000 RPM, slap it in and go. The worst that will happen is it will blow up - and you'll have to put in the engine you were building for it ANYWAY>>>>

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« Reply #39 on: May 09, 2008, 01:34:56 PM »


Everyone struggling for perfection is the surest way of never enjoying it!
thats a two edge sword :-\
but i FULLY agree

CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
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« Reply #40 on: May 09, 2008, 01:38:22 PM »
C'mon Speedy - help 2Sav out. Build him an Olds so he can get back on the water.  >:D
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« Reply #41 on: May 09, 2008, 04:07:41 PM »
C'mon Speedy - help 2Sav out. Build him an Olds so he can get back on the water.  >:D

Marc and I had a complete drop in and go factory high compression 180 lbs per cylinder 455 Olds but...
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2savage4you

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« Reply #42 on: May 09, 2008, 04:40:13 PM »
Marc and I had a complete drop in and go factory high compression 180 lbs per cylinder 455 Olds but...


Yeah and i also had the Omega at the time too    BUT!!  things change ;)

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« Reply #43 on: May 09, 2008, 04:49:19 PM »

...   BUT!!  things change ;)

2sav

Especially at your house 2Sav  >:D  J/K!

Just messing around 2sav. I'd run a cast piston before a hyperblowmatic piston. Just run it fat and it'll be fine.
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NO REGRET$ ... Arguing on the internet is like competing in the Special Olympics / no matter how good you do you're still retarded!!!!!

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« Reply #44 on: May 10, 2008, 03:55:17 AM »
C'mon Speedy - help 2Sav out. Build him an Olds so he can get back on the water.  >:D

OK, Already done. Ready to go 455 olds sitting here in the garage for you. :-)
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GlassCutter

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« Reply #45 on: May 10, 2008, 07:58:34 AM »
Mr. 2Savage4you  please pick up the white courtesy phone.

Mr. 2Sav  pick up the white courtesy phone.  Your ride is waiting.
  • Boat #1: 1973  Wriedt Montara 23
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Also, I will kiss bare male ass in the middle of the Vegas Strip  . . .  I will post pics if I need to.  --  IRRebel 2013

"Go ahead Rivertard does it.  Take a video though."

"If you did it in a dodge it would have shifted perfectly ran a thousand miles per hour and got optimum fuel mileage!"  Nordie  2012

 


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