Anyone regret having ECU Ivanized?

[terryd]

Originally Posted by Erilflynn

I have to admit at first I wasn't sure how much of a benefit I got. But after a month I'm quite quite pleased with the improved mileage, quicker response and lower temp. I just may have had unrealistic expectations at the start . And I don't find the increaseday Rpm at startup that bad. Happy camper now.

It took you a month to notice a difference? I knew in the first block that the improvement was huge! I did go from completely stock to ECU flash and Vance & Hines slip ons though. Added a Thunder Mfg BAK about a month later which bumped performance even further. Maybe if I'd had a fuel tuner and mods to start with the difference would have been more subtle, but from what I've read from everyone here I doubt it.