TURBO install begins

[backtrail69]

BMWSOB ran an 11.6 with a stock eta bottom end and i head with full MS...only internal mods I beleive is a crank scraper and metric blue head bolts, maybe a tiny bit of head smoothing.

[Erick]

Easy isn't the right word...its takes alot of planning and time to setup a reliable and good running turbo setup. AND money...

Yes, but you can upgrade as you go along.... I'm hoping to finally go to 10-12psi soon. My weakest link now is the OEM clutch.

[Jesse30]

Correct me if I'm wrong, but weren't etas 8.8:1 or 9:1 compression? I think it might make 80 - 100hp more than stock with 8psi, and more if he swaps to an I head later.

i thought i's have the 8.8:1 compression.

[ANDRÜ]

IM not sure what the compression is on the e or i, but I know the eta's is lower.

[PiercedE30]

i=8.8:1
2.7i=8.0:1(or lower 0

[euroshark]

I remember reading somewhere that etas up to a certain date were like 9:1.

I'll try to find it so I can prove that I'm not crazy

[euroshark]

From Strictlyeta.net:

In order to meet federal emissions standards in it's final year of production, the '88 325 receives a 325i cylinder head, exhaust system, and engine management control with self-diagnostic capabilities (Motronic 1.1) as well as special pistons, (lowering compression slightly to 8.8:1), a slightly larger intake manifold and a revised valve cover. These changes bump up the eta's power rating slightly (to 127) and a 6000 RPM tachometer is fitted. The cooling system is overhauled and the expansion tank is shifted to the driver side. A new oil dipstick and fuel cap are used, and the fuel tank is enlarged to 16.5 gallons.

Makes sense, they would need high compression to get the torque. The reason for the lack of power must come from the intake setup, head design, and cam. Notice there he says it went down in '88 to 8.8:1, so I guess the erlier ones must be the 9:1 motors.

[JasonC]

I remember reading somewhere that etas up to a certain date were like 9:1.

I'll try to find it so I can prove that I'm not crazy

http://r3vlimited.com/Tech/breakdown.htm

[euroshark]

Damn this wealth of knowledge that we have here!

[ANDRÜ]

UPDATE

Not much of an update, but its something. The AC garbage was getting in the way, and causing too much trouble, so it got the boot. Every part of the AC system in the engine bay is gone. I was wowed by the weight of the compressor, Im glad to have it out.

[moatilliatta]

my friend turbo'd his E. it was crazy like the E from hell!!!! but the headgasket blew... :( we already knew when we removed the manifold... I was like captin there is coolent in number 5 exaust port. later that day the ship had gone down.

[euroshark]

Hell yeah buddy, that AC system is heavy. I'm convinced that by removing all of that, my car may have actually lost a few pounds from the M30 swap! 57lbs of extra motor, and 80lbs less AC stuff.

[nando]

Damn this wealth of misinformation that we have here!

fixed that for you..

e motors actually have higher compression than i motors. good luck with your turbo anyway, but I'm not sure how well it will work out with a ~5,000rpm redline.

and I don't get how this is less time consuming than a built N/A motor..

[Mike325]

This will go good with your 4.10.

Good luck, can't wait too see the final product.

[moatilliatta]

some euro etas have a 9:1 compression ratio