SETA Question!

[pulsejakob]

Sorry if this has been asked a million times but my question is can you directly swap an 325i DME onto and 88 325 SETA? Thanks!

[reelizmpro]

yes you can but I wouldn't advise it unless you're running a 325i cam.

[pulsejakob]

What could go wrong if you don't have a 325i cam?

[reelizmpro]

Well your fuel maps will be off and you will have a higher rev limit than your cam and valve springs may support which could result in damage, etc. Don't do it. Get the right 154 dme unless you're modified.

[SmokeE30]

What could go wrong if you don't have a 325i cam?

The potential to over rev the motor for the seta valve springs is the only issue I encountered when I got a 88 325 seta running a Dinan chipped 325i 153 insead of the stock orange label 154. It was daily driven in that configuration for a long time but I was aware it was not safe to rev it like an I car and was careful but the previous owner thought it was an 325i and probably treated it like so.

I have a ton of stock 154 seta ecus if you need one pm me, it's definetly the safest bet but like I stated I have run a 153 without issue in the past.

[pulsejakob]

I may just do that because I have an 1988 325es and I believe it is a SETA but the previous owner has installed a 325i DME into the car.

[DaButt]

PO shouldn't have done. Go with your stock DME and a chip, works just great. My two cents.

[MR 325]

I may just do that because I have an 1988 325es and I believe it is a SETA but the previous owner has installed a 325i DME into the car.

There is no 88 325eS. Only 88 325. The 88 325 with no e/eS/i/iS at the end is the Super Eta car.

I'd definitely recommend sticking with the stock 154 ECU.

[3vilE30]

I'd definitely recommend sticking with the stock 154 ECU.

Don't blow up SETA motor by r3ving it 6,500 plz.
Also I've read somewhere that the 154 has a better spark curve than the 153 ECU.

[MR 325]

Don't blow up SETA motor by r3ving it 6,500 plz.
Also I've read somewhere that the 154 has a better spark curve than the 153 ECU.

Well the 154 is the Super Eta ECU. The 153 is a M20B25 ECU.

[dirtie30]

Swap in B25 valve springs and enjoy the 153 DME? Better yet, get a chip for either ECUs and have a little more fun with a raised rev limiter.
Why isn't this an option? It's not a particularly hard task, just time consuming.

[MR 325]

Swap in B25 valve springs and enjoy the 153 DME? Better yet, get a chip for either ECUs and have a little more fun with a raised rev limiter.
Why isn't this an option? It's not a particularly hard task, just time consuming.

Because to do it correctly you also need to swap the cam, intake manifold, throttle body, intake boot, injectors, air flow meter, and fuel pressure regulator. Now, this is what I would do BUT not everyone wants to rip apart an engine for "no reason" if it's running fine.

[dirtie30]

lol still trivial and can be done in a few hours, why not? MOARZ POWAH

PS, I was under the impression that the SETA had the same intake, TB, and injection system as an 885/1.3. Good to know otherwise. :up:

[3vilE30]

Well the 154 is the Super Eta ECU. The 153 is a M20B25 ECU.

Yes.

Because to do it correctly you also need to swap the cam, intake manifold, throttle body, intake boot, injectors, air flow meter, and fuel pressure regulator. Now, this is what I would do BUT not everyone wants to rip apart an engine for "no reason" if it's running fine.

Personally I wouldn't swap the intake manifold. It's factory extrude honed, port mached to the seta 885 head, it has long runners of an eta and the middle chamber of a b25 to give a good balance of low/top range flow.

You could get away with a b25 cam, stiffer valve springs and a 153 ecu. But it wouldn't be running optimally.

Proper would be what MR. 325 stated.