I thought some of you might be interested in this. You remove your secondary intake butterfly plates, this provides better flow in the high rpm range. This works for both turbo 2s and NAs of any year. Anyways here's the link



TB MOD

 

I did it, i didn't notice any drop in low end power, but a little gain past 4000-5000rpms. But the engine is alot more responsive and quicker revs. It does clean everything up and gets rid of the coolant that flows through it. The coolant heats up your TB, air going through the tb gets heated, heat= less power. The secondary thottles plates also cause a restriction even when completely open, getting rid of them gets rid of this restriction. Its a little rougher on the warm up if u live in cold areas though.

 

Im running my car with a modded and ported TB. Also, I have no BAC, or any other emissions crap on it. No a/c or p/s either. When I did the tB mod, I removed the thermowax and fast idle cam, and everything unnecessary off the TB. My car starts right up, idles fine at 1000 rpm when cold, never stalls, and drives great. I dont miss any of the stuff I took off.

 

i usually would let it warm up long enough for the thermostat to open, you can usually feel it when it opens up esp. if it's cold out and the temp gauge will start moving more when it opens up.



it's worth it just for how much cleaner it lets you make the engine bay, if you elminate the double throttle and the thermowax, you can eliminate the coolant hose and the throttle body gets alot cleaner.

 

Another useful thread

 

I started and stopped part way through.... something else I need to finish.



Has anyone done the TB mod with JB weld and how has it held up? Please give mileage, etc. Some people told me to stay away from the JB weld.

 

I used on my old N/A. Worked fine, I only used it for like a couple hundred miles though. I'm tapping them on my T2 though, no more ghetto **** for me.

 

I did it to my AE, and my boost didn't change at all. You do gain a decent amount of top end power. My buddy with a S5 TII couldn't keep up with me from 80+ mph. We both had only cone filters, and he was running more boost than me.

 

i did the mod on my 87 t2 and i love it. the car hesistates a little if you are trying to go slow but it's a small price to pay for the adde throttle response. it took me about an hour and i used jb weld to seal the holes. it was a very worthwhile mod.

 

I just finished the mod on a spare from the FC3S-pro instructions. Did you guys who have done it go through the TPS set up when you put the TB back in? I was also wanting to polish the inside real good to smooth it out. I was wondering if I should use the dremel tool or just hand sand it with some real fine paper or what... any input there?



thanks,

chris