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

[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]

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.

[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]

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]

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

[rThor432]

I'm just sick of having a car that won't accelerate past 70.

Your eta wont accelerate past 70? Mine has no problem up to 120, but that's about my limit.

Ah well, listen to Mitch. His motor is very nicely done.

[87e30]

Your eta wont accelerate past 70? Mine has no problem up to 120, but that's about my limit.

Ah well, listen to Mitch. His motor is very nicely done.

It can, just not really. I mean it will get there, but really slowly.

On an up hill drive I just took over the pass I was floored in 3rd and I bounced off the rev limiter but didn't even notice since I didn't think I was accelerating. 4th didn't move me any faster. I was only going 75 or so.

Thanks for the help. Looks like I'll plan on using the thinner headgasket plus i head for now.

What the differences between motronic 1.1 and 1.3? Is 1.3 that much better?

Would getting a markd chip effect either the decision between the two, or make a different effect on one versus the other.

Basically, is 1.3 really that much better? IS 1.1 with a chip alright?

[Mitch M]

What the differences between motronic 1.1 and 1.3? Is 1.3 that much better?

Would getting a markd chip effect either the decision between the two, or make a different effect on one versus the other.

Basically, is 1.3 really that much better? IS 1.1 with a chip alright?

2 board (1.1) vs. 1 board (1.3) and 1.3 has a few more trouble codes on the 5 stomp test. Stock for stock, some of the Spec e30 guys report more power w/ 153 (1.1) DME.

I've tried two different off the shelf i chips in my 2.7. MarkD and Bavauto. Both only added 3-4 peak hp on the dyno but the Bavauto chip didn't fall off as much past peak.

[87e30]

2 board (1.1) vs. 1 board (1.3) and 1.3 has a few more trouble codes on the 5 stomp test. Stock for stock, some of the Spec e30 guys report more power w/ 153 (1.1) DME.

I've tried two different off the shelf i chips in my 2.7. MarkD and Bavauto. Both only added 3-4 peak hp on the dyno but the Bavauto chip didn't fall off as much past peak.

Good info. So it looks that if I had an early model car, I could just grab the 1.1, the head, intake manifold, exhaust, and bav auto chip?

Then I'd be good to go.

I'm not looking for that 3 hp, but did the chip add power and throttle response throughout the revs?

I'm not sure if just the i head will fix this, but my eta just feels sluggish and unwilling to rev or go faster. Despite the fact that it will.

[Mitch M]

I'm not looking for that 3 hp, but did the chip add power and throttle response throughout the revs?

I'm not sure if just the i head will fix this, but my eta just feels sluggish and unwilling to rev or go faster. Despite the fact that it will.

W/ fuel @ $2 a gallon, the chip is worth it. This combo really needs a 272 or slightly larger cam as the extra displacement makes the i cam a lazy rever much past 5.5 K but night and day better than the 200 head.

[87e30]

W/ fuel @ $2 a gallon, the chip is worth it. This combo really needs a 272 or slightly larger cam as the extra displacement makes the i cam a lazy rever much past 5.5 K but night and day better than the 200 head.

So the chip will give me an improved "feel" throughout the revs.

And back to 1.1 vs 1.3. I just realized that my car has 1.1, so if I do a headswap do I even need to swap anything electrical? If I get a chip it seems like the car would drive correctly for the headswap.

Thank you greatly for your help. I feel SO out of place when it comes to the engine aspect of the car.

[eta]

I have just got back my E28 525e which has the UK spec engine. It now has a stock eta block + 10.2:1 pistons, stock 885 head, motronic 1.3 (which overfuels at idle when cold), 2.5 intake, eta exhaust manifold and pipes, single mass flywheel, manual gearbox and it flies (compared to an eta). CR is ~9.4:1. 30-60mph in 2nd gear took ~5.4 seconds which is not too shabby.

Stick with the stock cam as well. It gives you plently of low down torque which is what you want in the real world. And it gets past 5500 rpm with no problem.

Having tried a 731 head I can say the combustion chambers are too small for the eta block. It bolts up fine an runs fine but chamber is the wrong diameter. The 200 head combustion chamber is similar in shape but larger so how are the CC volumes of the heads the same? I have begun to doubt all the recieved wisdom on 2.7i motors as most of it has been inaccurate or only half the story.

Now for MS and a rolling road set up. What it will produce I don't know. As for an eta not being able to get past 70, change your rear end. My heavier 525e with a 3.46:1 final drive had no trouble getting to whatever speed I wanted.

With Motronic 1.1 just replace your ECU with a motronic 1.3 item it will apparantly work. More recieved wisdom though.

[dager325]

So if you run super eta pistons you would gain another 30 hp than running the stock eta pistons at alomost 140whp????

[Faviolosky]

eta- i saw a 88 528e in the junkyard, and it has the eta block,885 head(with single valve spring),1.3 motronic, does that mean that it is a UK spec, or that it has the same engine as the super eta,

one thing i noticed though is that the manifold was an eta manifold, but everything else was from an I

should i take anything to put on my stock eta???

[I got it, yes!!]

It can, just not really. I mean it will get there, but really slowly.

On an up hill drive I just took over the pass I was floored in 3rd and I bounced off the rev limiter but didn't even notice since I didn't think I was accelerating. 4th didn't move me any faster. I was only going 75 or so.

Thanks for the help. Looks like I'll plan on using the thinner headgasket plus i head for now.

What the differences between motronic 1.1 and 1.3? Is 1.3 that much better?

Would getting a markd chip effect either the decision between the two, or make a different effect on one versus the other.

Basically, is 1.3 really that much better? IS 1.1 with a chip alright?

This sounds like your clutch is slipping