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DaveWharran · 06-18-04, 11:33 PM

Robert's comments are right on. I had mixture problems even idling when I first started my engine. 4 cylinders were really rich due to minute variations in throttle plate settings (mechanical). Balancing all 8 throttle bodies for air flow is the first step.
IMHO, setting the maps is best done on a dyno. Mine was set up in two hours of dyno time by someone used to setting up the brand of ECU I had. Very hard to do on the street with that much HP and that light of a car.

I had a steep frustration curve with the HALL switch for the direct fired ignition. Like you with the carbs, I was ready to put a standard old distributor in just to get the thing to run without backfiring and barely running.

Technology is unbeatable when it works. When it doesn't work, it's a royal pain ITA.

In the end, I'm glad I stuck with and sorted out the EFI. Fuel mileage is decent. Throttle response and drivability exccellent.

Keep the EFI hardware and maybe go back to it some winter when you can't drive the car anyway.

06-18-04, 11:33 PM	#5 (permalink)
DaveWharran 2 Tenths Join Date: Sep 2001 GT40: Clearville, PA Posts: 270 Rep Power: 10	Re: Fuel Injection Fix Robert's comments are right on. I had mixture problems even idling when I first started my engine. 4 cylinders were really rich due to minute variations in throttle plate settings (mechanical). Balancing all 8 throttle bodies for air flow is the first step. IMHO, setting the maps is best done on a dyno. Mine was set up in two hours of dyno time by someone used to setting up the brand of ECU I had. Very hard to do on the street with that much HP and that light of a car. I had a steep frustration curve with the HALL switch for the direct fired ignition. Like you with the carbs, I was ready to put a standard old distributor in just to get the thing to run without backfiring and barely running. Technology is unbeatable when it works. When it doesn't work, it's a royal pain ITA. In the end, I'm glad I stuck with and sorted out the EFI. Fuel mileage is decent. Throttle response and drivability exccellent. Keep the EFI hardware and maybe go back to it some winter when you can't drive the car anyway.