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10-09-2007 #1
12.5:1 compression on pump gas???
I remember reading through a magazine, not sure which one it was, but it said it was possible to run 12.5:1 Compression on pump gas. It gave information about Cylinder head combustion chamber shape, it explained about what quench is, the total cc's above the piston at TDC etc. I lost the Article but if anyone has information on this that would be really helpfull
Thanks.
1993 Camaro Z28
2001 Camaro Z28
1969 Camaro
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10-09-2007 #2Never mind is 12:1 compression, and i found the article here.
http://www.popularhotrodding.com/tec...ression_ratio/
Any insight on this theory? Is it actually possible?
I also see that David Vizard is the Author of this theory so it must be true then?
1993 Camaro Z28
2001 Camaro Z28
1969 Camaro
10-09-2007 #3It's absolutely possible. It all depends on how much cylinder pressure is bleed off by the intake valve. Big cams = lots of pressure bleed.
Having all the details correct, like Vizard points out, can make or break the scenario as well.
Or, use direct injection. IIRC, Audi was running 12:1 on their 3.XL V6. And that's a production engine.Matt Jones
Mechanical Engineer
Art Morrison Enterprises
10-09-2007 #4