Reply With Quoteep3 headers will bolt up fine. But you may run into some other issues depending on how much from the z3 you'll be swapping.
I blew my motor middle of last summer and im ready to get a motor in. Pretty much decided on the z3, and i was wondering if it would drop right in..? I was gonna get a new header so which one do i get? As in a ep header or a Si header?
ep3 headers will bolt up fine. But you may run into some other issues depending on how much from the z3 you'll be swapping.
You will need Kpro, Karcepts TB adapter and if you decide on using the z3's 6spd then you will need to modify the shifter mech on the trans and source a digital VSS converter.
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What if he swaps everything? long block, tranny, and ecu
still need the digi converter.
I don't mean to thread jack, but it all pertains to the k20z3. Can you use the z3 throttle body? Or do you need a cable driven TB ?
Last edited by whatsvtec; 02-07-2011 at 09:52 PM.
wouldn't the cable just go to an actuator anyways? or is there a cable? good question..
The reason I ask is because the z3 is drive by wire and ours is not.
it was understood. idk how the DBW works on it. my other car had a cable that ran to a box, and then the box had a cable run to the TB to modulate it. I'm guessing its the same though...
if that's the case you might lose cruise control...
ignore me, I'm thinking out loud.
It sounds like that's what would happen. Never funked with no DBW stuff so I really don't know. I think I'd rather keep the ep3 TB anyways, electronics always seem to complicate things.Originally Posted by AKEP
it was understood. idk how the DBW works on it. my other car had a cable that ran to a box, and then the box had a cable run to the TB to modulate it. im guessing its the same though...
That's what a Karcept's adapter is for.
http://www.karcepts.com/shop/product.php?id_product=4
To keep the ep3 TB for use w/the rbc manifold right?
yeah that. im guessing the z3 tb is a no go all together then. i still wanna know about that z3 tb...
1. DBW won't work, you need a3 TB or a2 + adapter.
2. Cannot use z3 ECU, you need Kpro your a3 or a2.
3. Need speed converter, I have hybrid racing speed converter.
4. If you have CAI, you need to modify slightly due to the angle difference.
5. Some year shift mechanism already has the 6th gear slot precut, but most do not. Therefore, need to cut them or use type-s's.
6. If you get RH with testpipe, delete CAT, modying will be mimimal, but keeping CAT with stock exhaust, you'll have tougher time.
7. Need to shave about 0.25" to 0.5" off of radiator support to fit the IM, not that bad, just need a tat bit shaved or bent if you're freakishly strong; hercules hercules!!! (don't mind my early morning humor...)
8. May want to consider Reverse Lock Out Switch, if you're using ep3 ECU, but you don't need it. Just need to be real careful, because the gear slot into reverse is cut in an angle, not straight vertical, so you may slip in there from 5th (NO NO!!!). I 've seen someone do this and parts shot out of tranny... scary...
That's all I can remember from my swap... GL!!!
thanks.
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