Ok, I measured the inside diameter of my t/b and MAF to the best of my ability on my 90 stang. I came up with a 63mm t/b, would that probably be a 60mm? Also is that stock, cause it has a Cobra intake and possible they used the Cobra t/b? I don`t know what stock t/b is for the Cobra or the stock 5.0? My MAF measured 73mm, I`m guessing that is is a 70mm MAf, would I be wrong? I know the MAF has been changed. I guess I need to know stock 5.0 t/b size and stock 93 Cobra t/b size and that would help a bunch.

 

I think you have a 73mm MAF and 65mm throttle body. No that's not stock, stock is like 58mm MAF and 60mm throttle body.

 

Well, I measured the inside of the t/b and I noticed a slight lip where the butterfly is that would make the inside a little smaller. I couldn`t reach that far in to measure it so I measured at the entrance of the t/b. I`m guessing it is the stock 60mm t/b. If so, what do I need for a t/b upgrade? 65mm? Is there a stock car I can take one off of or just buy new? Is a spacer needed or recomended for performance? Thanks for any help. Newbooob, lol.

 

55mm for maf

 

leave the t/b for now...look under the maf and see if it's a c/l they usaully stamp the size on them..

 

adding a bigger t/b on a stock engine doesn't nec turn into instance horsepower

 

i have stock t/b and MAF and i tho't maybe if i did both... maybe 65 MAF and 70 t/b then it will increase it... not signifcantly but increase air intake will bring more hp

 

Well, actually you would want a bigger maf than t/b.

And if you get a 65mm t/b, you should get the spacer too, you can use a bigger spacer for smaller t/b but not smaller spacer on a bigger t/b.