From what I understand, ESP is not affected at all. The stock 'puter program will reduce timing at the shift point (reducing the torque applied to the tranny) giving you a "smoother" shift. I saw some dyno graphs from GIFO4 without the SC FP installed, and the drop in applied ponies is significant. The SC FP changes this and is very noticable when driving. Also, the 91 tune will advance the timing just a little more, giving you more HP as well (not much, but not zero either).
For me, the SC FP was/is the best bang for the intial mod buck; although, I am one of those persons in SoCal that has pinging issues with the fuel out here.
Stay Tuned! (Sorry Ron!)
jimt
PS: Welcome to the forums! If you are willing, how about putting your location in your profile. That will give your posts some context in where you are, the Meet and Greets in your area, help in your area, etc. etc.
There is a great deal of knowledge on this board about the LX Platform (I don't consider myself in this mix, I am still learning from the x-perts here!). Again, welcome!
