M30 ECU question

[Chrisliney]

hi all
im just about to start my conversion, i seem to have almost all i need as im getting it off a friend off the E30 forum.
my question is that i havent got a ECU for the M30b35. would any M30b35 ecu work or is it a try it and see if it works?

thanks
Chris

[leeparkes]

You can use a 172/173 ECU from an M20 320i/325i, the only difference is the eprom chip which can be available from the likes of Speedtouch on here.
Or put a post up in the wanted section for an M30 ECU.

[Speedtouch]

The proper one is a 179 ECU, as fitted to later 535i/635i/735i models. However, as Lee says, any later 6-pot ECU will work if you fit the correct chip.

The earlier M30B35 used a 150 Motronic 1.1 ECU. A 179 will usually work in its place, at least, it did on my E34 535iSE.

[Driftben]

Hi Maurice
Chris is buying my M30, iv still got that megasquirt ecu I brought off you. Would that work when plugged into the standard M30 loom?

[Speedtouch]

Not sure, Ben, though I'd imagine you will need to modify the loom somewhat.

When I had it, it was fitted to a 325i Sport (Tech 2). For details on how to fit it, see Flappysocks' site:

http://wiki.diyefi.co.uk/

[Rav335uk]

I'm running a 325 ECU with one of maurice's chips, works fine.

[Chrisliney]

Hi Maurice
I'm just wondering if I can get my hands on a M20b25 ecu, is it just a case of changing the chip and that will enable me to use it for the M30b35 with no other mods apart from the ones made to the loom?

Thanks
Chris

[Chrisliney]

where abouts is the part code that corresponds with the ECU that id be looking for?

thanks
chris

[Speedtouch]

Hi Chris,

As said above, any later 6-pot ECU will work, so long as you install an M30B35 chip. So you could use an 0 261 200 172/173/380/381.

The label should be on the lid of the ECU. For examples of this, see magpie's recent thread:
http://www.e30zone.net/modules.php?name ... 54&start=0

If you need an M30B35 chip, I can provide either a standard or uprated one.

As regards Loom mods, check out the Sticky guide to it here:
http://www.e30zone.net/modules.php?name ... 93&start=0

Regards,