ClassicCarl

Hey everyone I bought a 62mm throttle body and am confused as to why the iac doesn't fit into the new one. Its supposedly for a 4.0L. Here are some pics. I have the one with the block looking extension on the side. the proper one seems to be the one without that extension, that you bolt the iac and its adapter housing onto. any ideas?

mentalbreakdown00

Can't help ya man. There's a guy on here who bores them to 62 for like 65 bucks or less..the stock ones I mean

ClassicCarl

wouldn't I need a new butterfly for that? I'm a machinist man I can bore my own 100% haha.

mentalbreakdown00

Yes he makes them ... The stocker is 60 or 62 at the top and narrows

ClassicCarl

so if i was to bore mine out to 60mm I could use the factory butterfly?

If anyone else recognizes this tb please lemme know

mentalbreakdown00

No it's narrower at the bottom you have to make your own for 60 or 62

stang65

fox body butter fly and shaved it down for mine. if i remember correctly after boring it out.

ksrummel

If you bore your stock TB to 60mm you do NOT need a new butterfly valve. TB starts at 60mm and tapers to 52mm or so right below the butterfly valve. Only need a new one if you bore out to 62mm

ClassicCarl

ah that's what I thought thank you

ksrummel

Anytime! And if you know somebody wanting one bored to 60mm let me. I have 1 im wanting to sell, I just haven't posted it yet