I had a FAST 90/90 setup on my 414ci and only gained 7hp. Kinda dissapointing for what the damn thing cost... So I sold it.

I used to own a dyno shop and like others have said we didn't have a single FAST TB that didn't take alot of tuning to get it to quit hanging on decel. Matter of fact I think Slowtrap's car is one we tuned also.

 

It doesn't help to port the intake while running stock heads. The intake is already ported larger than stock. The more I think about it I just think it is to much intake for the combo. That is not a bad thing because I can always grow with the intake but I think I am going to have to increase the cam.

 

Well I got the idle working. Not to much of a problem, but I agree that it should have gained something or more so in your case.