i head swap question.

[slo325i]

Before anything, I need to mention that my 87 325i has a 86 eta motor in it. Don't ask why, the PO decided that's the motor he wanted. I guess the cool thing is that all the electronics and the wiring/ecu is for the i motor but the eta still runs fabulous with it.

Now I'm growing a bit sick of the 4500rpm limit that I constantly have to be aware of since my ecu is for the i motor that supposed to rev 6000+

My question is, if I sourced a 87 325i head and all the accessories on it, could I just swap it with the eta head and keep the eta block that i have on now? I mean, the car is made for a i motor. And I have all the i electronics in the car now running the eta motor. Would this work? Please enlighten this noob.

Justin

[E30_fiend]

yes

but there may be a few things left to wire up or replace to make it work. It all depends on how thorough the previous owner conducted the swap.






Taylor

[jlevie]

That is doable and will result in a "budget stroker" In this case you'll need an I head, intake, and throttle body.

[slo325i]

I mean, i did notice a few connectors that were left unhooked and dangliing. But otherwise, seems like like a pretty straightforward swap.

yes

but there may be a few things left to wire up or replace to make it work. It all depends on how thorough the previous owner conducted the swap.






Taylor

[slo325i]

That is doable and will result in a "budget stroker" In this case you'll need an I head, intake, and throttle body.

It's already running a i throttle body, icv. What about the fuel injectors? are they the same between the eta's and the i's?

[slo325i]

Also if I replaced the head with the i head, I get my 6000+ rev limit back right??

another question. If i had the eta block and i head, as you call a 2.7i, which timing belt would I need to get? one for the eta or the i?

[416stroker]

ya you can rev it it will be fine I had one and it revd to 6900 no problem you should get the head milled to bump the comp. ratio up.

[416stroker]

I ran an I timing belt didnt know they were different.

[slo325i]

Thank you!!!

[416stroker]

theres a lot of info on the 2.7I read up youll learn a lot about it .

[slo325i]

theres a lot of info on the 2.7I read up youll learn a lot about it .

I appreciate you letting me know. I've been reading alot up one these "budget strokers." Now if i could only source a good i head. Anyone???

[416stroker]

Just get one from pnp and build it with a 272 reground cam from ireland. It wold be pretty sick. I think BFC has some great info the build up. The head should be milled like .020 or somthing.

[slo325i]

Gonna build for reliability and simplicity for now. I've been searching for this one answer though. Which afm would the 2.7i require? the eta one or the i one?? Also about the fuel injectors? eta or i injectors??

[416stroker]

The I one for both questions. I dont know which are bigger?

[kenika65]

click on my 2.7i how to in my sig all answers will be answered then if you still have questions ill be glad to help!