Alright guys, this is what a eta bottom end and i head gets you.

[Mitch M]

So, if I'm reading this correctly, there are two different thicknesses of head-gaskets made by BMW?

So mill head use thinner one for now.

If I ever boost throw thicker one in there?

Correct. Std gasket now...thicker later if needed. Thicker gasket drops your static compression ratio ~3/10's of a point on a 2.7.

02 Cylinder Head Gasket Asbestos-Free 1,75MM 1 11121722734
02 Cylinder Head Gasket Asbestos-Free 2,05MM(+0,3) 1 11121722735

[87e30]

Go ahead and mill the head. $50 or so + ~$25 for a std head gasket is a lot cheaper than the headgasket $ u are looking @. If u decide to boost later, u can always use the std BMW thicker head gasket.

So, if I'm reading this correctly, there are two different thicknesses of head-gaskets made by BMW?

So mill head use thinner one for now.

If I ever boost throw thicker one in there?

[Mitch M]

Go ahead and mill the head. $50 or so + ~$25 for a std head gasket is a lot cheaper than the headgasket $ u are looking @. If u decide to boost later, u can always use the std BMW thicker head gasket.

[87e30]

I've heard that the Cometics sometimes blow-out between cylinders.

I'd stick with the standard HG, maybe look into O-ringing the block or head, if you think you'll be running that much boost.

Just my

Good to know. I'm actually trying to think of ways to bump up compression slightly, since most likely I won't be boosting anytime soon (if ever) but I'm just sick of having a car that won't accelerate past 70.

[Devil Inc]

I've heard that the Cometics sometimes blow-out between cylinders.

I'd stick with the standard HG, maybe look into O-ringing the block or head, if you think you'll be running that much boost.

Just my

[87e30]

Cometic offers a thinner MLS gasket for the M20, but I've yet to hear of anyone using it for this. Might be a good alternative.

Does anyone have any input on this?

[jmc1590]

Cometic offers a thinner MLS gasket for the M20, but I've yet to hear of anyone using it for this. Might be a good alternative.

[87e30]

Is there a thinner headgasket anyone is using to bump up compression on the i head with eta block. Or is milling the head down the best way to go?

[lifeiskaos]

How in gods name can you run 21 psi on a stock B25??
I thought only 8 psi is allowed on stock internals??

tuning. dyno tune on a standalone and you can get 500+hp out of a stock b25. a chip and rrfpr poorly tuned can kill an engine on 5 psi

[yberther]

nope. stock internals are good. Many people have run 20+psi daily.

[Slurpyy]

How in gods name can you run 21 psi on a stock B25??
I thought only 8 psi is allowed on stock internals??

[lifeiskaos]

How much did your megasquirt run you?--

$450 shipped PM me

[E30QC]

How much did your megasquirt run you?--

[Faviolosky]

i have eta completely stock with CAI and exhaust straight pipe 2.5 with magnaflow muffler at the end, and in my garage i have the 885 head, i intake manifold and throttle body,
what else would i need?? Megasquirt or Stock i wiring harness(meaning a lot of more things which basically is switching all i components on a eta block)
(if i put the i throttle body wont i need the i ICV which is completly different from the eta one two plug) i am rather confused?? sorry for my ignorance

[StereoInstaller1]

Main relay? You should likely post your question elsewhere, though.