why run low compression pistons and use flat face valves to bring the compression back up?
09-01-2005, 02:35 PM
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lemme take a stab.
you're asking why do people use low compression pistons, when they're flat bottomed valves, increase the compression back to what it was?
My answer is i don't know but is that what you're asking?
you're asking why do people use low compression pistons, when they're flat bottomed valves, increase the compression back to what it was?
My answer is i don't know but is that what you're asking?
09-01-2005, 02:54 PM
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flat valves won't increase ur compresson that much..i think people run them because their a little stronger than a domed valve...i think that's right...anybody???
09-01-2005, 07:48 PM
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Re: (Turbo E)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo E »</TD></TR><TR><TD CLASS="quote">lemme take a stab.
you're asking why do people use low compression pistons, when they're flat bottomed valves, increase the compression back to what it was?
My answer is i don't know but is that what you're asking?</TD></TR></TABLE>
yes that is my question
you're asking why do people use low compression pistons, when they're flat bottomed valves, increase the compression back to what it was?
My answer is i don't know but is that what you're asking?</TD></TR></TABLE>
yes that is my question
09-01-2005, 07:56 PM
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Re: (11seclude)
im using flat top 1mm os valves in my head with a 9:1 cp piston. the flat valves have more material on the surface of the head which means they can take higher temps without getting hot spots, etc. stronger
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09-01-2005, 10:55 PM
#10
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Re: (wantboost)
When you're talking about total weights in grams, I think it's more important that heat capability. I've never had a heat problem with stainless valves.
09-02-2005, 04:56 AM
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I would bet the resilience to heat damage is FAR more dependent on the valve job quality then the valve mass. The valve has to transfer the heat from the face of the valve to the valve seat quickly. Adding material won't increase that rate of transfer and if the valve can't transfer the heat to the seat quickly enough, no amount of added material is going to help the problem.
To me, it seems like the added weight would be much more of a problem then an advantage.
To me, it seems like the added weight would be much more of a problem then an advantage.
09-02-2005, 10:38 AM
#12
Re: why run low compression pistons and use flat face valves to bring the compression back up? (11se
A flat-top piston will translate more downward force than a domed-top, will it not? Less force vector components other than downwards.
09-03-2005, 01:33 PM
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Re: (99_GS-T)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99_GS-T »</TD></TR><TR><TD CLASS="quote">ITo me, it seems like the added weight would be much more of a problem then an advantage.</TD></TR></TABLE>
thats what i was thinking.
so there is no real benifit to flat face valves besides heat transfer? so going with a lighter valvetrain is better but wont transfer heat as good? hmmmmmmm am still not sure about this.
thats what i was thinking.
so there is no real benifit to flat face valves besides heat transfer? so going with a lighter valvetrain is better but wont transfer heat as good? hmmmmmmm am still not sure about this.
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