What size in (mm is our factory throttle bodys? I've heard 52 mm. Is this correct?

 

I thought it was 48mm, and the feiro, non-interchangable is 52.

 

48mm? Wow..that kinda sucks.. Although even with a bigger one it probably won't help much more considering the plenum and heads....

 

im not sure, i thought the v6 was 48 and the fiero was interchangable, ive got a 350 now, its got dual 42 mm throttle, but my buddy and i have been looking all over for junkyards with good fieros cuz he heard they are interchangable on the v6

 

I think the V-6 fieros have something funny with the throttle linkage, like it's on the opposite side or something weird that makes the throttle bodies non-interchangeable as Dale said..

 

Greekss350: What about mpfi celebrity euro-sports;

My linkage was so worn i couldn't set the tps. I found one on a celebrity that had the same part number on it as my 87 firebird.
It also had the same mat, maf, iac and tps. That celebrity was a gift from ***, i needed all those parts. everyone one wants to hose you as soon as you say "I need a xxxx for a Firebird".


thought i'd throw that in here if it's any use

 

I own a 62mm Throttle body, I'm having extensive welding and porting being done to the plenium and intake manifold to match. Here's a link to them, don't know if you can still purchase one, I believe they have stopped making them-
http://www3.sympatico.ca/fjpeters/throttlebodies.htm

 

Hey all you swap guys, it says they're making one for the 3.4!!

 

I know, im on it already



However, that tb for the 3.4 is being made as a direct bolt up to the 3.4l intake, which is diff then the 2.8/3.1 intake, as so is the TB totally different