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Gas + Compression ratio #2530943 08/03/18 01:24 PM 08/03/18 01:24 PM
Joined: Jan 2005 Posts: 1,772 Keymar, MD DusterKid OP top fuel
DusterKid OP top fuel Joined: Jan 2005 Posts: 1,772 Keymar, MD	Building a 408 stroker with eddy 63cc alum heads .551/.570 solid cam, race only motor that will be spun to 6500. What would be the max compression ratio for running a mixture of 3 gal of 93 pump gas with 2 gal 110 sunoco race gas (comes to 99.8 octance I guess?).

Re: Gas + Compression ratio [Re: DusterKid] #2530945 08/03/18 01:29 PM 08/03/18 01:29 PM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	With what mixture? What spark curve? What quench distance? What intake valve closing point? Boffin Emeritus

Re: Gas + Compression ratio [Re: polyspheric] #2530964 08/03/18 01:50 PM 08/03/18 01:50 PM
Joined: Jan 2005 Posts: 1,772 Keymar, MD DusterKid OP top fuel
DusterKid OP top fuel Joined: Jan 2005 Posts: 1,772 Keymar, MD	Originally Posted By polyspheric With what mixture? What spark curve? What quench distance? What intake valve closing point? Cam specs: Advertised Duration (Int/Exh): 290/302 Duration @ .050 (Int/Exh): 256/268 Gross Valve Lift (Int/Exh): .550/.571 LSA/ICL: 106/102 Valve Lash (Int/Exh): .024/.026 Not sure on quench distance yet, as playing around with head gasket thickness

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