Re: Lets Talk IAT's...
Originally Posted by waldig
I have had an electronic and mechanical pressure gauge on the rail. NEVER saw a pressure drop, when I did testing WAY BACK I had 17:1 A/F [with the 178 pulley, now have the 185] and set the regulator to 80 PSIG and it went to 9:1 PIG RICH or lower, 'limit of gauge 9.0'. This was with up to 20 psig boost.
THere is no limit imposed by our regulator or pump as far as I know. If there is Id check the pressure differential across the regulator filter assembly.
Our leaning is caused by the increased intake manifold boost pressure, pushing back on the injector reducing its EFFECTIVE pressure at the pintal. Nominal 60 psig - 20+ pounds of boost, = effective 40 psig and 2/3 's the fuel delivery. Several others have tested this and had similar positive results.
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Last edited by SLK32Germany; Dec 17, 2009 at 05:32 AM.