Quote:
Originally Posted by 509Chevelle
Can anyone tell me the advantages/disadvatages of running an OEM ECU as opposed to F.A.S.T., Big Stuff 3, etc? I know the aftermarket stuff is more pricey but that isn't my concern. I'm more concerned about tunability with custom and future mods, etc.
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the aftermarket stuff usually has more features, bells and whistles, etc. On a super/turbocharged engine many of the aftermarket systems come with a wideband O2 and the ability to stay closed loop even under boost. Kind of nice that the ecu can add fuel if needed under boost, the oem stuff can't do that. Many have boost controllers, trans controllers, nitrous controllers, etc. built in.
Both can work very well, with the correct tune being the key. I think the aftermarket stuff is easier to tune, mostly because there are fewer parameters you can get into when tuning. But the factory computers are very capable for nearly any combo you'd run.
Jody