s14 itb's on m42

[nickmp0wer]

Ok so im pretty convinced i can make them fit physicly with my welder and adapter paltes. But could i use the m42 injectors in the s14 throttle bodies? if not i was thinking of either going with custom manegment, or just putting the throttle body ass. onto the adaptor that holds the stock m42 injectors and goes between the cylinder head and the intake manifold stock, what do u guys think?

[Jordan]

It's a m42... spend the money to swap it, not to try and bastardize it.

[Stu]

Good luck. S14 throttles are not the ones to use though. :)

[nickmp0wer]

if i can get them for $50 (w/o airbox and trumpets) they are

check these out http://bimmerforums.com/forum/showth...hlight=itb+m42

[Stu]

if i can get them for $50 (w/o airbox and trumpets) they are

check these out http://bimmerforums.com/forum/showth...hlight=itb+m42

I see a hackjob setup that's not bolted on a motor....that is worthless. You gotta understand that the cylinder spacing difference between the M42 and S14 for all 4 cylinders, is roughly 3 inches. That throttle system doesn't look like it will even line up on an M42 head. I'd like to see more than one or two pics of the trumpet/port connection. S50 throttles are the ones to use, since M/S50's and M42's use the same cylinder spacing...hell the blocks are made with the same tooling.

At any rate, if you decide to go the S14 route--best of luck getting it setup and tuned

[nickmp0wer]

jez i thought the difference was like less then an inch not 3! I guess i'll looking to some euro s50 tb's but could i use the stock injectors? if not it looks like a setup like this might be the way to go and just leave the fuel rail where it is and have something like this before it

[Jon325i]

if i can get them for $50 (w/o airbox and trumpets)

Try $450 shipped according to the thread, and its still going to be a hack-job intake when you're done with zero guarantees that it will work. You can spend that $450 in a better way. 2 or 3 high performance driving courses is where I would put that money.

Jon

[Jordan]

Everytime I see that picture I just can't get over how rotted the thermostat housing is.

[nickmp0wer]

if i can get them for $50 (w/o airbox and trumpets)

Try $450 shipped according to the thread, and its still going to be a hack-job intake when you're done with zero guarantees that it will work. You can spend that $450 in a better way. 2 or 3 high performance driving courses is where I would put that money.

Jon

i was talking about buying a different set and moding them myself. Theres a set of e30 m3 euro tbs on ebay right now

[Stu]

If you need a set, we have some S14 throttles avail for sale I believe, I'll have to check with my brother.

[2002maniac]

S14 Throttle bodies would be WAY too big for a M42. what you want is a 38-40mm TB. I have a ITB'd m42 planned for the future in an 02. I will be using a set of TB's off a Suzuki GSX 600. They are 38mm. If you go too big you will lose low end torque and there wont be any gain at high rpms when compared to properly sized intakes. Megasquirt and some hairy cams would make for one FUN m42!

[Streetspec_iS]

I have a ITB'd m42 planned for the future in an 02. I will be using a set of TB's off a Suzuki GSX 600. They are 38mm.

yep, i was going to say look into using bike throttles. usually found in abundance and it is easier to adapt them. the good thing is they come as a 'complete' unit (ie fule rail, injectors, TPS...). a lot of them are attached with silicon hose, so all you need is an adapter plate w/ runners to suit the mb tb set spacing. tie that in with some after market management and ya laughing.

Megasquirt and some hairy cams would make for one FUN m42!

and yes, i am one to agree. especially in a lightweight '02. keep us posted.

[Streetspec_iS]

your other option would be to mak/have made a custom larger intake plenum, and run a single(or double) larger TB on the intake of it.

[nickmp0wer]

S14 Throttle bodies would be WAY too big for a M42. what you want is a 38-40mm TB. I have a ITB'd m42 planned for the future in an 02. I will be using a set of TB's off a Suzuki GSX 600. They are 38mm. If you go too big you will lose low end torque and there wont be any gain at high rpms when compared to properly sized intakes. Megasquirt and some hairy cams would make for one FUN m42!

yeah i looked at some of those on ebay and they look like they'd work quite well. It looks like they have 2 throttle plates in each tb for a progressive rate throttle which is similar to what the stock tb is like.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4543570831&category=35597&sspagename=WDVW

seems like it would be pretty easy to attach these before the stock fuel rail. I think the hardest part would be making an airbox

[2002maniac]

I wouldnt bother with an airbox. Just use sock filters on the velocity stacks. You would need Megasquirt, SMT-6, or some other standalone, but you would want that anyway