2.7i build questions, please help.

[TopOfTheLine89]

I have searched and found some answers but no clear ones so...

I have a 87 325 2.7.

1: What is neccesary to make it a 6250 rpm motor.
2: Can i swap an IS head? ( i heard that you could only do this on super E'S?
3: any other good options/swaps to increase rev range.

[blazing]

Swapping an i head to a non super eta shortblock would produce a low compression ratio.
To rev higher you would need an I intake setup and a euro head(I don't know the casting number off the top of my head)and a a chip.
Ideally you could use super eta pistons with your current crank and an i head
to get good results.

[ColdAccord]

there have been a million threads on this, should be pretty easy to find.

putting an i head on there will yield too low c/r. you need custom pistons. like the 10.2:1 mahle pistons I have for sale in my thread in the classifieds.

[Hadrian]

and a euro head(I don't know the casting number off the top of my head)

731... from a 323i

[doucy2]

3: any other good options/swaps to increase rev range.

b18 swap FTW, V-TECH Yo!!!

[NomadE30]

there have been a million threads on this, should be pretty easy to find.

Very true there is many thread. Second Hard to find the right answers. The best way to figure out if this or those pistons will work is simply by building the motor and checking clearances

[MR 325]

Use your Eta block, 88 Super Eta pistons, Eta or Super Eta rods, and an i head, wiring, and ECU.

There you go, a 2.7i using OEM parts.

[ColdAccord]

or spend 550 on pistons and get more p0w4h. my pistons, a cam, and an maf will get you along quite nicely

[TopOfTheLine89]

ok, thanks to everyone for answering, the pistons were the main thing i nereded to know, there is a 325 is at my uncle junkyard i could pick up cheap and rebuilt if i don't want to go swap crazy.

[NomadE30]

or spend 550 on pistons and get more p0w4h. my pistons, a cam, and an maf will get you along quite nicely

does your pistons have the rods with them or not, and what rods would you use and are they made to match a I head or e head?

[viali8]

this might be helpful

http://bimmer.roadfly.com/bmw/forums/e28-lounge/6151178-1.html

http://209.85.129.104/search?q=cache:D8MERHSWxX0J:forums.bimmerforums.com/forum/archive/index.php/t-420580.html+e30+323i+731+conversion&hl=en&ct=clnk&cd=3&gl=ch

http://www.e21bmw.net/graymarket/library/327i.php

[viali8]

http://209.85.129.104/search?q=cache:D8MERHSWxX0J:forums.bimmerforums.com/forum/archive/index.php/t-420580.html+e30+323i+731+conversion&hl=en&ct=clnk&cd=3&gl=ch

[viali8]

sorry i cant get this link to work