08-22-2003, 10:49 AM
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CC Member
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Join Date: Jan 2000
Location: scottsdale,az,
Posts: 733
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Not Ranked
Mr. fix it, I care that you can get it to idle at low rpms with an efi and have throttle response below the power curve of the cam. You can have the best of all worlds. My motor pulled 660 hp at 7200 rpm flowing 750 cfm thru a 750cfm holley. My throttle body is 1050 cfm so I doubt I loose any top end versus individual runners. It's kind of the same reason roller cams make sense, lots of lift which helps everywhere with less duration so you don't kill your low end like the big cams of old used to do. The issue of the time it takes to tune an efi motor depends a lot on the resolution quality of the system. The more resolution you have, the longer it takes to tune the system. The other tricky part is the 02 sensor is behind the curve while you tune. Did you see that when you were tuneing? It took me a while to figure out that a few boxes earlier on the fuel map were the ones to alter when looking at a datalog graph. It was not as critical at WOT in 4th gear but was super critical on any tip in acceleration. Scott
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