throttle bodies and mass air meters

[racerx911]

I have a 2001 GT 4.6 2v. I have done the regular mods which include l.tube headers, x-pipe (no cats), 3.73 gears, steeda pulleys and timing advance as well as tri-ax shifter. My car is a daily driver. I have the stock intake plenum and throttle body. Would like some advise weather I should use a 70mm or 75mm (ford or BBK) t.b. (which make is better?) and what size of mass air meter 80mm or what (granatelli or c&l) ? I plan on changing the intake plenum to c&ls intake plenum. With this in mind, in the future I would like to add an ATI S/C. Anyone out there w/ reliable advise? Thank you guys.

 

[twogts4us]

Check these tests on modulardepot---> http://www.modulardepot.com/?show=articlesdet&aid=30 (part 1 with 70mm TBs) and http://www.modulardepot.com/?show=articlesdet&aid=38 (part 2 with 75mm TBs). This is very reliable info with dyno graphs on a 03 GT with mods very similiar to yours. So you can really look at these graphs and decide for yourself.
Which TB is better? - Accufab! They used this exclusively in their testing as most companies do.
As far as replacing your MAF - don't bother. The C&L simply leans your motor out to make power. The OEM MAF is good for 350 (or more) HP. If you want your GT to breathe better, get rid of the accordian tube from the MAF to the TB and replace with a K&N GEN 2 FIPK, C&L TrueFlow Tube, or Densecharger Tube.
Best of Luck and Welcome to StangNet!