Today, I added an aftermarket upper plenum and 75mm throttle body to the old 215k mile GT. I found new-unused parts for a good price, so I jumped on it... they are made by professional products.
The install was smooth. As others, I had to clean up the hole for the throttle return cable. The throttle retainer bracket didn't fit as nicely as factory either, but it works. Seems like the parts made a nice difference in power. The throttle is obviously more touchy in normal driving. That's probably a good thing during the hot summer with the AC on, but I am not sure how it'll work out in the snow yet. I am not sure if it gained any mid range torque as many see, but I do notice it runs out to red line a little better. From what I read before, if my NPI didn't have the other mods, it wouldn't make much difference.
I guess I have accumulated a good number of mods now...
PI intake
PI cams
offroad H pipe
tuned (TwEECer)
underdrive pulleys
drop in K&N
removed air snorkle
Seems like I am just about out of easy "bolt ons". I would like to add PI heads sometime, but I don't see myself dealing with long tube headers. The difference in power from stock is dramatic though. The stock NPI would run out of breath by 4500 and had little chance of breaking the tires loose from a roll, even in first gear. Now, it'll rev out much nicer and make a scene in first if you aren't careful.
Here are a couple pictures:
The install was smooth. As others, I had to clean up the hole for the throttle return cable. The throttle retainer bracket didn't fit as nicely as factory either, but it works. Seems like the parts made a nice difference in power. The throttle is obviously more touchy in normal driving. That's probably a good thing during the hot summer with the AC on, but I am not sure how it'll work out in the snow yet. I am not sure if it gained any mid range torque as many see, but I do notice it runs out to red line a little better. From what I read before, if my NPI didn't have the other mods, it wouldn't make much difference.
I guess I have accumulated a good number of mods now...
PI intake
PI cams
offroad H pipe
tuned (TwEECer)
underdrive pulleys
drop in K&N
removed air snorkle
Seems like I am just about out of easy "bolt ons". I would like to add PI heads sometime, but I don't see myself dealing with long tube headers. The difference in power from stock is dramatic though. The stock NPI would run out of breath by 4500 and had little chance of breaking the tires loose from a roll, even in first gear. Now, it'll rev out much nicer and make a scene in first if you aren't careful.
Here are a couple pictures: