Quote:
Originally Posted by blueghoast
I run the sm and the e-heads with comp-ratio's @ 11.75-12.00.1 comp.
91 octane pump gas on all of mine with no issues, Race gas when spraying.
GT
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12:1 on 91 octane pump gas, this goes against the limits generally accepted. I'm curious about this maybe the accepted standard is incorrect or it's the cam duration and LSA that is critical. I am building a new engine right now that has E-heads with the earlier style combustion chamber and my compression is coming in around 11.75 with a zero deck and .04 thick gasket. I would like to have a pump gas engine even though it a track only car. I have been told 11.75 is too high for pump gas so I was planning on milling the heads for more compression since I would need race gas anyhow. If I can use 91 or 93 pump gas at 11.75:1 That would be my preference. Comments? Thoughts on this?
The cam I will be running is an Ultradyne solid roller, Master Lobes R44/R41, 264/268 @ .050, 176/187 @ .200, .3944/.3944 Lobe Lift .592@1.5/.651@1.65, LSA 108