I am going to be buying a new 58MM throttle body. I bought a used TPI system....and noticed that one of the screws that screws the bottom half of the TB (where the IAC is screwed into) to the actual TB was broken off...so I cant take it off. Not really a problem since i'll be ditching the TPI system for a superram. However, when I buy the new TB...will it come with the bottom part as well? All the pics ive seen seem to be missing this part. If they do...good. If not, where can I get a new one from? I dont want to bother with drilling and tapping new threads.

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1992 Teal Camaro RS
T-Tops
305 TBI V8
Open air element
3" Flowmaster Exhaust System w/Quad Tips
Aiwa CD/Mp3 player
10 Disc CD Changer
Rockford Fosgate Speakers
SLP Headers Coming
Dynomax High Flow Cats Coming
More to come.

 

it dosent come with the bottom part.
you can get one from a junk yard or GM parts store.

 

Do you happen to have a part number for it? Im looking for it..but it seems to not have a part number

 

i believe you are talking about part 61, part 70 is the IAC and you can reuse it. 61 has to be transfered from the old tb to the new.

 

not to stop u .. but if u are planning on putting a 58mm on a tpi 305.. u are going to come into alot of issues. thats just WAY to much air for the engine... i have a 406 that i decided to put a 58mm TB onto because later it will have a S/C... but i could have gone with a 52/54mm T.B. so id seriously think about just getting a 52mm..btu hey its your $$.. im just trying to give u a heads up.

[This message has been edited by aziroc (edited August 19, 2001).]

 

Well its going to be on a 383 Superram......and yes Ive been told to go with 52mm....and ive been told to go with 58mm....probably a debate that will keep going....i think i'll just go ahead and go with a 58 since the superrams tb holes are 58.

And 54mm would probably be the best to go with...but the only place ive seen that makes them is AS&M...and its da*n expensive.

[This message has been edited by mult68 (edited August 19, 2001).]