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mercedestech · 05-24-2013, 08:54 PM

I will be watching this thread closely. I'm at 7.5 psi with a 4.00 inch pulley on my whipple, but will be dropping to a 3.85 inch really soon. At WOT my A/F is an indicated 10.8-11.0. I have not altered the gauge to correct for ethanol as Dan stated....Is this an issue? Most of the pumps around here state "May contain up to 10% ethanol", but don't say exactly what the amount is. Without knowing exactly, I'm not sure it is even worth messing with. Any thoughts? What is a good rule of thumb for cruise a/f (no boost) and full boost? I was under the assumption at cruise 14.7 was ideal, and under boost anything under 12.0 was acceptable

05-24-2013, 08:54 PM	#3
mercedestech Drives: 2010 2SS/RS IOM,2013 Mercedes ML350 Join Date: May 2010 Location: Akron Posts: 507	I will be watching this thread closely. I'm at 7.5 psi with a 4.00 inch pulley on my whipple, but will be dropping to a 3.85 inch really soon. At WOT my A/F is an indicated 10.8-11.0. I have not altered the gauge to correct for ethanol as Dan stated....Is this an issue? Most of the pumps around here state "May contain up to 10% ethanol", but don't say exactly what the amount is. Without knowing exactly, I'm not sure it is even worth messing with. Any thoughts? What is a good rule of thumb for cruise a/f (no boost) and full boost? I was under the assumption at cruise 14.7 was ideal, and under boost anything under 12.0 was acceptable __________________ 2010 Camaro 2SS/RS Whipple 2.9L, Rotofab CAI and coil covers, XS Power LT's and full 3" exhaust, Vengeance kaotic cam package (trunion kit,dual springs,titanium retainers,hardened pushrods,c5r chain,ls2 tensioner, melling oil pump) Mgw shifter, 160 deg Tstat, prosport gauges, LPE dual pump, FIC 60lb injectors, level 5 DSS Axles 1994 Z28 MSD optispark, K&N CAI, Magnaflow y pipe..Cat..and cat back. 1998 wheels, custom tune(sold ) 1993 Base V6 sold to buy Z28 1994 Purple Pearl V6...sold 1979 Base Car with inline 250ci 6 cyl! My first car in 1989!