Quote:
Originally Posted by FUNFER2
Tony, that's actually a little larger cam than I expected. Is the Accel programing better suited for the trumpet style EFI than the FAST system, like the EZ-EFI Multiport Retrofit Kit ?
Can it also be modified or is it not as friendly to custom tuning ?
Do you suggest any paticular Accel part number that may work for Ford and a stacked injection system ? (Ford probably doesn't matter)
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Unless you have an excellent tuner with a dyno and a lot of time I would personally avoid the Accel system. It has way too many knobs, and while they have starting point tunes, they are way off for an engine with anything other than a standard engine. You would want to find someone in your area that has been Accel factory trained.
The thing started and ran with the canned tune I got from Roush but didn't operate "well". I specifically wanted the full closed loop system so I could drive in the mountains - I had altitude ranges from 5000' to 12000'. Roush's suggestion before I "divorced" them was to run (I think it is called) Alpha-N mode which basically runs from the throttle position sensor, and the TPS of the Roush top side doesn't have a very wide range or sufficient granularity.
My tuner looked at the factory ones and compared them to the Roush one, and found that the Roush had some cliffs. The whole system is based on table lookups and they hadn't properly blended some adjacent cells. They figured that the engine wouldn't ever "get there" but didn't allow for altitude. As I said, it ran perfectly at sea level (actually, the 1000' or so in Detroit).