Throttle body questions

all the 4 cylinder throttle bodies are interchangable right ?

also what is the size of stock a B16a TB ?

Kun

JDM B16A SiRI and XSi is 58mm
JDM B16A SiRII is 60mm
USDM b16a2/3 is 60mm

All 92+ throttle bodies are compatible. 88-91 civic has different mounting points. 90-91 integra B18A is compatible with 92+ d and b series

If you're look'n for a throttle body...find yourself a type r. They're 64mm which is a perfect size.

i ported an polished my friends on his rex now its 78mm

you can use a good drill press an its easy... i own a strong press so it wasnt hard to find one

i ported an polished my friends on his rex now its 78mm


yO are you NUTS?! Thats way too big! Even 70mm is too much! 70mm is good for FI but 78mm...?

yO are you NUTS?! Thats way too big! Even 70mm is too much! 70mm is good for FI but 78mm...?


yeah thats what I was thinking 78 is friggen huge!

eh how exactly did you port and polish it?

Thats what i like to know. Its not port and polish. He probably meant bored out? The walls are probably thin as hell.

i bored out my stock ZC throttle body about 5 - 8 mm and port matched it to the intake

How did you make a stock Honda TB 78mm?!! I'd like to see some pics of that.. Even an ITR TB ported to 68 is like paper thin.. I don't see how there could be 78mm there to even port out?!!?

Kunundrum - Look around for a used ITR TB if I were you, you can pick them up pretty cheap and they're cheaper if you get a used one than any aftermarket throttle body. Pretty much the same thing. forums.clubsi.com has a pretty good forsale - Canada webboard if you're looking for parts like that.

I just knocked like 5 or 6 mm out of mine, I got it bored out to 60 mm and did a little work on the ports on the head, should be nice once I get the car running again, cept I'll be running the stock cam again

it's all good I have a JG 63mm Throttle body on the way. slightly used and got it for 80$ shipped !

Noice price!

What kinda IM are you going to be using? And what cam again? I forget. :)

Skunk2 Stage 2 and the AEBS intake manifold

it was orig. 74mm only took 4mm off it - why is that nuts ? not gonna break the walls look like about as thick as a credit card now .

Either way its still TOO BIG! Take it to the dyno...you'll see loss of torque!

How did you measure it? I've never seen nor heard of a 74mm TB on a Honda? I think it was Spoon that made the biggest and I believe it to have been 70mm.

Its retardedly large.

I figure it's not a honda TB... he might have bored a Mitsu TB or Chrysler TB.

Yeh you could be right. He should be more specific.