Thread: Best EFI conversion for a Hilborn mechanical unit?
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Old 11-07-2004, 04:03 AM
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Cobra Make, Engine: Shelby CSX 4236 with a Shelby aluminum 427 "It's The Great Pumpkin"
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Rick, it sounds like the engine runs great if your accelerating, but during cruise there are some flat spots. The original owner also felt he wasn't getting the HP the motor should be capable of with everything he has in it. It has a 613 lift roller cam and mild porting on the heads which are high rise type. Compression could be 11.5, I'm still waiting on the build sheet to see. It's atleast 10.5
The old Accel 6.0 runs from DOS on the computer and I don't think it has wide band 02 or spark control. A dyno shop with experience on the Accel EFI tuned it, but never got all the settings nailed down.
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