Hi,
I am planning on replacing the throttle body on my truck. Currently I have headers, a borla cat-back exhaust, the convertors will be being removed this week, and an airforce one intake. I plan on purchasing an XCAL 2 underdrive pulleys, and *possibly* and E-fan setup. What size throttle body should I go with?
Thanks!

 

get a BBK or a Edelbrock 75mm throttle body dont get a cheap MAC they stick and break....

 

Thank you very much!! I was just going to ask what brand to get!

 

75 mill bbk witch i think edelbrock ownes now if i am not mistaken

 

Recently installed a bbk 75mm on my 99 5.4 im noticing a whistle when i get on the gas I have a k&n fipk is the whistle from the amount of air its sucking or do I need to adjust the throttle body?

 

the noise is from the IAC

 

Will I also need a new MAF sensor?

 

nope stock MAF is good up to about 450HP i think..... but ur Maf is calibrater for ur stock 19lb injectors only reason u would need to recalibrate or get a different MAF is if u upgraded ur fuel system

 

I recently installed a 75mm BBK, and had to cut it off of the OEM iac with a grinder, as I could not get the old screws loose............. I was patient and careful, and the iac looked fine but now I have that " moosing " sound, which searching tells me is a bad iac ................ I think there is a pretty good chance
a new iac is part of the TB upgrade.

I was surprised at the poor match from tb to manifold, and how rough the manifold casting was inside......... the instructions furnished with the TB say to match ( grind ) the mani to the tb........... an operation I hadn't planned on.........

 

yeh i know u will see a better gain if u match it... if not u wont see much at all