Pistons?
Thread Starter
Supreme Member
Joined: Nov 2006
Posts: 1,724
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From: NY sucks
Car: 84' Corvette, 96' Caprice
Engine: LT1, L99
Transmission: T-56, 4L60e
Axle/Gears: 3.07 POSI, 2.93 Open
Pistons?
I was talking to a guy today and he seems to think Flat tops lower compression and dish pistons raise it (he would probably bet his life on it)..... I know this is a stupid question but i want to MAKE SURE. Thanks
Supreme Member
Joined: Apr 2004
Posts: 1,077
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From: Denver, CO
Car: cleanest '86 sport coupe around!!
Engine: 355ci twin 66mm turbos on e85
Transmission: built rmvb th400 w/ t-brake
Axle/Gears: 3.23
Re: Pistons?
higher to lower compression in descending order:
dome
flat top
dished
dome
flat top
dished
Thread Starter
Supreme Member
Joined: Nov 2006
Posts: 1,724
Likes: 1
From: NY sucks
Car: 84' Corvette, 96' Caprice
Engine: LT1, L99
Transmission: T-56, 4L60e
Axle/Gears: 3.07 POSI, 2.93 Open
Re: Pistons?
ok thats what i thought. Thanks a lot for making me 100% sure.
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also in another thread someone mentioned "Hypereutectic pistons are strong but brittle" he said minor detonation can cause them to crack. is that true. i was going to use them b/c they are cheaper than forged and its only going to be a 355. How do you guys feel?
----------
also in another thread someone mentioned "Hypereutectic pistons are strong but brittle" he said minor detonation can cause them to crack. is that true. i was going to use them b/c they are cheaper than forged and its only going to be a 355. How do you guys feel?
Last edited by v10viper04; Jan 12, 2009 at 07:45 PM. Reason: Automerged Doublepost
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Pistons?
Hypereutectic pistons are very strong, but unforgiving. With a power adder if you have a momentary lean condition or have detonation under load a forged piston will usually slowly melt and burn away in places but keep running for a while despite the damage. A hypereutectic piston in the same condition will shatter into pieces. For a naturally aspirated street engine it'll never be a problem.
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