i Valve Springs in my Eta head?

[EtaSport]

Well my car can run my friends 89 WITH the 2.93 rear, dual mass flywheel, and stock eta exhaust.

True, the valves will hold you back a little bit, but my car is totally different. There is even more low end, and the motor doesnt stop pulling. With the I cam it really pulls over 3500 all the way up. I dont notice any drop off up the rpm range. I wouldnt swap in an i motor and loose my torque and fuel milage.

However, the largest gains were noticed after I switched to motronic 1.3. I had power increase with cam/port work/valve springs, but with stock chip it wasnt a wow of an increase. Id imagine it would run much better with an aftermarket chip.

My ideal set-up would be a 323i head on the 2.7 block, and motronic 1.3. I believe this would put out at least 170 maybe 180 crank. Hopefully if we ever get to it I'll be able to get my car on the dyno soon and tell you how it does.

[Jand3rson]

So you are using a different ECU altogether, not the 027 eta ECU? Which one are you using? Is it just a matter of swapping the whole ECU box?

[E30 Wagen]

what BMW uses the 1.3 motronic?

How much torque do you have EtaSport, and what body kit is that, especially the side skirts?

[EtaSport]

So you are using a different ECU altogether, not the 027 eta ECU? Which one are you using? Is it just a matter of swapping the whole ECU box?

My first setup used all the stock eta parts. Made a difference, but held back its full potential. With your chip, you should notice a good increase if you want to still run the eta fuel injection. I rarely have to rev past 5000 to get going anyway.

Right now I have a fuel injection from an 89 325i which includes everything from intake to oil level sensor, wiring harness, and spark plug wires, etc. It uses a 173 ecu.

Torque wise, im probably around 180-190. I drive in the city and i might see 2500 max. There is no need to rev any higher. I dont really think my power predictions are too biased now that ive been in a 325is. 3rd gear pulls in my car are faster than the is.

[Jand3rson]

My first setup used all the stock eta parts. Made a difference, but held back its full potential. With your chip, you should notice a good increase if you want to still run the eta fuel injection. I rarely have to rev past 5000 to get going anyway.

I'm probably going to end up using E28 M5 injectors, they are the same low impedance as the stock eta ones, but deliver more fuel. I'll also be using a 325i intake manifold and throttle body, but have also been entertaining the idea of simply widening the throttle body opening of the eta intake manifold to match a 325i throttle body.

[EtaSport]

the e28 injectors should work great. I also had my eta manifold ported on the throttle body and head side. It made a difference before i did the head work. Not much, but im sure you know that. So how much it would help is negligeable after the install. Im sure every little bit does help though. Plus you can always just swap in another intake.

[Jand3rson]

It all depends on how much I can find a 325i intake manifold and throttle body for. I really want the 325i parts, because I want to port match the eta head to the i manifold for more airflow.

[e30bimmerdude]

I highly suggest the swap, i have done this on my eta with the jc chip, i didnt port anything, but even with the 5300 redline the car becomes alot more fun, and the throttle response is alot better... check out the euro depot... they have good prices..

[Jand3rson]

On my last eta, before I went ahead and just dropped in an M20B25, I had a 325 intake manifold and throttle body on the motor. It made such a huge difference, it was great. With this car, just adding the JimC chip created so much more power that I just wanted more.

My biggest motivator for this new project is that I got the brand new 325i valve springs for free, and I also just got a spare M20B27 head from my 325eS parts car with pretty low miles. So I'll be able to build this new head over as much time as I need, for really cheap, without having to worry about downtime with my own car. Pretty much all I need now is a stock 325i cam, plus all the new parts for the head. I can get all the machine work done for cheap, such as the additional oil journal holes drilled, and my brother and I are going to do the port matching of the intake ports ourselves.

[rs4pro3]

I'm probably going to end up using E28 M5 injectors,

Those are a tad overkill, Stock they are rated at 24lbs. I'd go for something in the 19ish range.

[Jand3rson]

Those are a tad overkill, Stock they are rated at 24lbs. I'd go for something in the 19ish range.

What other injectors are there that I could use with the eta fuel injection?

[EtaSport]

I think the regular m30 injectors will work. Like the 3.3 liter motor. I dont know if the 3.5 is the same or not. But one of them is either a 17 or 19 lb.

[rs4pro3]

the 3.3 M30 are 24lbs, 3.4 and 3.5 M30's are the wrong impedance

[Jand3rson]

the 3.3 M30 are 24lbs, 3.4 and 3.5 M30's are the wrong impedance

That sucks. So what can I use? Is there anything besides the E28 M5 units?

[EtaSport]

the 3.3 M30 are 24lbs, 3.4 and 3.5 M30's are the wrong impedance

hmm. I didnt know that. Can you decrease the flow rate by using a lower pressure regulator?