[darbikrash]

If at all possible you should use the as-installed EFI and spark control you intend for the car on the engine dyno. The degree of EFI tuning you can get done on an engine dyno is well beyond what you can do on a chassis dyno due to cooling limitations . The engine dyno has no such limitations. I just did my throttle body EFI 467 on the engine dyno, and the amount of tuning we accomplished was priceless. Even for the "self tune" EFI systems.

[JLMounce]

Originally Posted by darbikrash

If at all possible you should use the as-installed EFI and spark control you intend for the car on the engine dyno. The degree of EFI tuning you can get done on an engine dyno is well beyond what you can do on a chassis dyno due to cooling limitations . The engine dyno has no such limitations. I just did my throttle body EFI 467 on the engine dyno, and the amount of tuning we accomplished was priceless. Even for the "self tune" EFI systems.

I second this if such a system is being used. I'm not an advocate of the "self learning" nomenclature that these systems are touting. They can only learn to provide fueling and spark based on what you tell it to do.

Having the engine run and tuned on an engine dyno will be a lot easier to figure out what the engine likes and thus get the system where it needs to be instead of guessing, road testing, changing, road testing until you've got it where it wants to be.