Ported throttle body pix
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Senior Member
Joined: Jan 2001
Posts: 311
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From: Atlanta, GA USA
Ported throttle body pix
This took me a lot longer than I thought, but I'm happy with the results.
Ported & Polished Throttle Body
Ported & Polished Throttle Body
Senior Member
Joined: Jan 1999
Posts: 7,030
Likes: 3
From: WINDSOR, ONTARIO, CANADA
HI!... It's about time you guys started to catch up to me!!!!!!
I was the 1ST to do this mod 6 years ago. The TB ELBOW also. 
TED : Good write up and pics. I was too lazy do do a write up on it years ago. Glad someone finally did. Good job. 
I was the 1ST to do this mod 6 years ago. The TB ELBOW also. TED : Good write up and pics. I was too lazy do do a write up on it years ago. Glad someone finally did. Good job.
Senior Member
Joined: Apr 2004
Posts: 218
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From: Maple Valley, WA
Great write up, the pictures help out a ton. I've got a couple questions that I hope you wouldn't mind answering.
First off, what is the point what is the point of the "knife edge" on the butterfly valve? I've never heard of doing this.
Also, does the butterfly valve feel any weaker with part of the half shaft removed?
Once again, props on a nice job with the throttle body. My girlfriend could use that bad boy as a mirror
First off, what is the point what is the point of the "knife edge" on the butterfly valve? I've never heard of doing this.
Also, does the butterfly valve feel any weaker with part of the half shaft removed?
Once again, props on a nice job with the throttle body. My girlfriend could use that bad boy as a mirror
Senior Member
Joined: Jan 2005
Posts: 5,389
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From: Fort Worth,Tx
mine is all ported out the same... but there is minimal gain.. i just smoothed mine out for flow reasons cause the intake port is still same size... so that kinda stuff only helps throttle responce... and makes the whistling noise from the IAC sharper
also whats the new size on the TB? 70mm?
also whats the new size on the TB? 70mm?
Last edited by Faster150; Mar 21, 2005 at 01:03 AM.
Senior Member
Joined: Jan 1999
Posts: 7,030
Likes: 3
From: WINDSOR, ONTARIO, CANADA
HI!... The stock TB is rated at 70mm. BUT........ it is ONLY 70mm around the area that the butterfly swings. The 1st section of the TB is only 66-67mm in diameter. So what your doing by porting it is making it a TRUE 70mm all the way through the total bore of the TB. Also the TB ELBOW has a huge restrictive HUMP on the bottom of the entrance. I took this out and shaped the inside of the TB ELBOW to my liking! LOL! Secret stuff.........
I ran with half a butterfly shaft for 6 years before switching to a fully ported polished BBK 75MM TB. No problems at all.
I ran with half a butterfly shaft for 6 years before switching to a fully ported polished BBK 75MM TB. No problems at all.
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Senior Member
Joined: Jan 2005
Posts: 5,389
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From: Fort Worth,Tx
nice job on the intake elbow porting... i'll get around to doing a better job on my own. its just polished up currently. after i boost i'll do some more intake work cause as is... dont help to much..... but if i get bored i'll do some more porting and polishing
Senior Member
Joined: Dec 2004
Posts: 891
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From: Lost some where in the middle of the Ozark Mountains!
Very nice write up... Good job.
If you can excuse my ignorance for a minute and allow me to ask. What does setting the TPS do and what it is set for at from the factory? This part is a totally new mod to me that I had not heard of.
If you can excuse my ignorance for a minute and allow me to ask. What does setting the TPS do and what it is set for at from the factory? This part is a totally new mod to me that I had not heard of.
Senior Member
Joined: Jan 1999
Posts: 7,030
Likes: 3
From: WINDSOR, ONTARIO, CANADA
HI!... The TPS is the THROTTLE POSITION SENSOR. The optimum voltage setting for the TPS is 0.98 - 0.99 volts. Mine was set at 0.82 volts from the factory. By adjusting it to 0.98 - 0.99 volts, it will give you better throttle responce and as much as 1 tenth reduction in 1/4 mile times.