flat or dish valves
#13
Registered User
Originally Posted by carrera4,Oct 12 2008, 12:55 AM
A flat valve adds a bit of compression.
They won't add much though...the only gains you'll see is maybe a bit of torque.
#14
I am gong to throw out a wild ass guess of .2. It's certainly not more than .5, but .1 seems a little low. .2 CR increase would imply roughly 1 CC decrease in volume or about .25 CC per valve.
You can probably call supertech and find out how much volume is in the dish, it will be different for the intake and exhaust valves.
You can probably call supertech and find out how much volume is in the dish, it will be different for the intake and exhaust valves.
#15
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Join Date: Nov 2007
Location: York, Pa/ Harrisburg, Pa
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Carrera4 I really am glad you know whats going on. Always great advice, and you help us all in many ways. IYO Is it work doing a top end over haul ( vavles, springs, retainers, seats) for the reduction of mass and CR increase, plan of going stand alone in the near future and would like to rev higher.
#16
I would think you get less then .2 doesent the spoon head gasket only adt .2???? You might as well thrwo that into the mix while the head is off this way youll get a combined cr increase with flat valves and thiner head gasket. just my 2cents
#19
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So over all with gasket and vales max would be in the rage of .3 CR will that be a gain of anything or will the lighter stronger valve train just be good enuff to handle the extra 1k RPM!
#20
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Originally Posted by yorkman1,Oct 15 2008, 08:48 AM
So over all with gasket and vales max would be in the rage of .3 CR will that be a gain of anything or will the lighter stronger valve train just be good enuff to handle the extra 1k RPM!