Just purchased a MAC Performance throttle body (P/N 3775) for my truck and was wondering if anyone has one of these on their truck and what they think of it. I'm also wanting to make sure that the TPS voltage setting should be the .97-.99 as stated in other threads here. Thanks for any help you guys can give me.

 

tis cheaper to port your stock throttle body.. if u dont have the skill ill sell u mine. but u wont see much any gain in getting the larger throttle body.. atleast nothing worth 100+ bucks. with the minimal mods u have

 

True, with the mods you have now a new TB really isnt going to make much of a difference. Not to mention a MAC one (MAC=cheap crap for future reference)
f
You might want to check into other stuff such as Efans, gears, etc.

The correct TP voltage is .998. Or is it .989. Crap I cant remember, one of the two, close enough to each other

 

yeh mines lik .98 and its fine.. as lonst as it is just under 1v within 1-3 100ths it is within ford spec

 

Thanks. Wondering what other mods you'd suggest to make the throttle body have more of an effect?

 

half shaft it. here ted has a good write up on it
http://home.comcast.net/~therazy/Por...eBodyPage.html

 

I know I've seen it on here before (illustrated even) how to check the voltage on the TPS harness, but for the life of me I can't find it now that I need it. I seem to remember that it was the top and the bottom wires you pin ***** to check. Help anyone?

 

Figures, no sooner than I posted for help finding it...I found it right after. Anyway, for anyone else looking for it or needing it, here is the link:

https://www.f150online.com/forums/sh...rottle:rocker:

 

I have A MAc Throttle Body for my F150 4.6 sohc And I was worndering if having a throttle body spacer would make problems for having the truck tuned and underdrive pullyes make problems with a K&N cold air intake on it too???? Can someone get back to me on that email.is, nymphoman77@hotmail.com

 

throttle body spacers have been dyno proven to take power from your engine!!

 

What kind of horsepower gains can a stock 5.4 gain by porting, and half shafting the stock throttle body?

 

I had a MAC Throttle Body and it leaked - big-time! Replaced it with a BBK and it worked fantastic. I believe the biggest benefit for using a larger TB is in conjunction with a supercharger - port what you got first.

 

i think modular depot only saw lik a 5-8whp gain. by porting the stock throttle body and plenum

 

Thanks, but my truck runs too good to screw it up for 8 hp. I was hoping you'd say "well about 40 hp"!!!!