2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

tb mod

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Old May 23, 2008 | 12:43 AM
  #1  
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From: louisville, ky
tb mod

i cant find the dam,n thread for the tb mod? i DID search but nothing comes up that even has to do with throttle bodies? can someone tell me how to do it or shoot me a link.
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Old May 23, 2008 | 01:32 AM
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Don't do it. I've tried a tb with it and hated it!!!!!
Search some more, it's there.
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Old May 23, 2008 | 01:35 AM
  #3  
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Originally Posted by RyosukeD
Don't do it. I've tried a tb with it and hated it!!!!!
Search some more, it's there.
rriigghhtt
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Old May 23, 2008 | 09:35 AM
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From: nowhereok
here you go. i have it done and its just fine..
http://www.rotaryresurrection.com/2n...s_removal.html
http://www.rotaryresurrection.com/2ndgen/techmenu.html
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Old May 23, 2008 | 11:30 AM
  #5  
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No reason to do the Throttle body mod on a non turbo. You will not gain any HP, and can potentially give yourself cold weather drivability issues.
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Old May 23, 2008 | 11:55 AM
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Originally Posted by Icemark
No reason to do the Throttle body mod on a non turbo. You will not gain any HP, and can potentially give yourself cold weather drivability issues.
+1. I had the mod done to mine (have since swapped it out for a stock TB) and would not go back. It does not offer much besides crisper throttle response in an N/A. Feels about the same on the butt dyno as well. Mine was also hard to start when it was cold and would die at stoplights, but I also had the AWS disabled. My .02.

Gains from doing this mod are more apparent in the TII model. I think there's a whole thread in the racing subsection N/A performance.
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Old May 23, 2008 | 12:07 PM
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From: nowhereok
i have t2 and 13b rew with em done i wasnt sure if he had a t2 or not
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Old May 23, 2008 | 12:24 PM
  #8  
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cold start sucks on a modded TB, i have driving the 7 when its to cold and im late for an appointment.
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Old May 23, 2008 | 01:04 PM
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From: Jaffrey, NH
hehe i just did the tb mod but i left the cold start stuff on so no starting problems and no idle problems and i ported it a little. the throttle response was so much better when you punch the gas it jumps for idle to like 4 grand almost instantly and when cruising i can punch it in pretty much any gear and it just goes not like before when there was always a slight hesitation i love it will never go back to having secondary butterfly's
but to each his own
Luke-
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Old May 23, 2008 | 02:44 PM
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Originally Posted by TweakGames
rriigghhtt
??
You think it's a useful mod?
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Old May 23, 2008 | 07:05 PM
  #11  
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From: Jaffrey, NH
i dont know about him but i think it is as long as you leave on the cold start stuff
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Old May 25, 2008 | 08:44 AM
  #12  
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I was going to do the TB mod, but I love my crisp throttle response when i drive...
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Old May 25, 2008 | 11:37 AM
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I swapped a modded TB for a stock one, I hated having to keep my foot on the gas to keep the car idling (s4 T2).
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Old May 25, 2008 | 11:46 AM
  #14  
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From: Jaffrey, NH
i dont understand why you guys all have problems with the throttle body mod because i dont and love how sharp the throttle response is
Luke-
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Old May 25, 2008 | 12:38 PM
  #15  
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Originally Posted by arghx
I swapped a modded TB for a stock one, I hated having to keep my foot on the gas to keep the car idling (s4 T2).

I have never had an idling issue with the TB mod... cold or hot??? I think you need to either adjust the idle screw, the BAC valve or crack the throttle plate set screw
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Old May 25, 2008 | 03:16 PM
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Its called a dashpot, it is supposed to stay there and you'll never have idle problems comming to a stop. Not everyone does the same tb mod and it definately shows through on the results. I have ported mine but retain the secondary butterflies. I have a standalone and the butterflies are triggered at a certain pressure to open (custom setup) and it makes a world of difference cruising at high revs and driving around town. You'd never know I had an 8.5lb flywheel with lightened rotors (8.5:1) other than how fast it revs.
Like any modification, its the attention to detail that shines through.
Several writeups exist, but I have noticed that they all are different. I never actually followed one when I did mine. I just did what I felt was best for what I had. I am a diy kinda guy + I have a few unmolested tbs' that I can switch out if I want.

dpf22
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Old May 25, 2008 | 11:17 PM
  #17  
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From: louisville, ky
Several writeups exist, but I have noticed that they all are different.


i noticed..... i think im gonna give it a try. better throttle response is always good and i was planning on taking out the cold start anyways. thanx everyone
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Old May 26, 2008 | 12:16 PM
  #18  
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Is that thing Turbo?
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I'll have to find my pics. I ported my tb on my 86 NA and i noticed a little gain. I also don't have cold start problems. maybe i'm just lucky. I tend to do alot of things people say won't help but with my car almost stock and i garuntee it'd do 14s in the 1/4. i think every little bit helps.
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Old May 27, 2008 | 03:35 PM
  #19  
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From: louisville, ky
im not sure i like the way it described through RR directions.... does anyone have there own pics and instructions for a S5 N/A
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Old May 27, 2008 | 04:07 PM
  #20  
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From: marietta
I used RR's instructions and breezed through the project. I spent about an hour tuning, but the engine now runs better than before the change.
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Old May 28, 2008 | 03:16 AM
  #21  
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what about ITB's anybody have any pics
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Old May 28, 2008 | 03:28 AM
  #22  
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From: MASSHOLE
wow man I didn't even use directions lol
I took it apart carefully and put it back together minus the parts I wasn't using
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Old May 28, 2008 | 01:16 PM
  #23  
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i ported the hell outta mine on a 88 n/a and never had a prob with it at all but deff use the 3/8 np plugs dont use anything else

<a href="http://s198.photobucket.com/albums/aa216/fast87t2/?action=view&current=HPIM0526.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa216/fast87t2/HPIM0526.jpg" border="0" alt="Photobucket"></a>
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