What pistons for 4" stroke?
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TECH Apprentice
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From: San Antonio, TX
What pistons for 4" stroke? I want to use a 4" stroker crank and a 6.125 rod. Would it be necessary to use a dished piston to maintain stock compression ratio?
How much dish?
I will be supercharging and already have TEA FI heads on the way. Supposed to lower compression from 10.25 to 9.5. Is additional dish desirable if I want to be able set back up to stock later?
Thanks,
How much dish?
I will be supercharging and already have TEA FI heads on the way. Supposed to lower compression from 10.25 to 9.5. Is additional dish desirable if I want to be able set back up to stock later?
Thanks,
Re: What pistons for 4" stroke? The Lunati kit can come with pistons that have a -8cc dish that is supposed to give you the stock compression ratio.
There is a set of these Lunati's for sale in this classifieds and also on e-bay right now.
George E.
There is a set of these Lunati's for sale in this classifieds and also on e-bay right now.
George E.
Re: What pistons for 4" stroke? Here's a nice calculator.
http://www.csgnetwork.com/compcalc.html
Using 3.9 bore, 4" stroke, no dish, .054 head gasket, .006 piston above deck, 73cc chamber gives 10.5 to 1 compression.
Using those Lunati -8cc pistons gives you 9.7 to 1
HTH
George
http://www.csgnetwork.com/compcalc.html
Using 3.9 bore, 4" stroke, no dish, .054 head gasket, .006 piston above deck, 73cc chamber gives 10.5 to 1 compression.
Using those Lunati -8cc pistons gives you 9.7 to 1
HTH
George
Thread Starter
TECH Apprentice
iTrader: (3)
Joined: Jul 2002
Posts: 358
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From: San Antonio, TX
Re: What pistons for 4" stroke? George, You da heat! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
I am watching the ones on ebay; even closer now. Thanks for the info.
I am watching the ones on ebay; even closer now. Thanks for the info.
