Contour Enthusiasts Group Archives Forums Modifications Duratec Performance question about bigger TB

ok when you put a bigger throttle body like a 65mm you loose a little horses due to more air less fuel... sooo could I doe the " IAT " mod to get more fuel with the more air comming in and be good?? or will this due harm??? just a question and thought about it today..
thanks for the input guys and ladies
Timmaayy

I went with optimizing the existing TB and if there are ANY lost horses, the ones that are left must be working a lot better. This was an instantly recognized improvement anytime I stepped on the gas. The IAT mod seemed to increase pinging with 89 octane so I gave it up. The 65mm TB may require some extra tuning via chip and AFC to get the most out of it as you have apparantly found out. IIRC, I don't think the IAT mod can help the mixture situation at WOT. Bnoon has a good price on a core exchange of your stocK TB for an expertly optimized one.