M60 ECU

Tue Dec 31, 2013 2:36 pm

I have have two ECU's for my M60 conversion:

261 200 404 - (fairly sure this came out of my 530)
261 203 484 - (fairly sure this came out of the 740)

I will be running the B40 lump but I am not certain how to determine whether the '404 (Non-EWS) is from the B30 or B40. From a quick search online it would seem that the part numbers are the same for both B30 & B40 for a '404 style ECU.

Can anyone advise how to check this short of just seeing if it is short of fuel when running? Also alternatively if this is just a chip can I swap it over from the '484 to the '404 to avoid EWS and ensure correct fueling?

Cheers,

Adam

Mon Feb 17, 2014 8:21 am

Cheers Will, Afraid that I don't have the EWS bits... I can't see any difference either but guessing they must have a different map, I notice that both engines (3&4L) run the same injectors so guessing it can't be the same map with a heavier flow rate...

Wed Feb 19, 2014 6:55 am

Ive ran a non ews 404 (from a 530) on my 4l for last 3 years. Has been perfect

Wed Feb 19, 2014 11:36 pm

Awesome!! I wonder what determines the map/fueling at a different rate?!

That leaves me only 4/5 more things on the shopping list now then

Thu Feb 20, 2014 1:03 pm

Duly noted... I do find it odd that they run the same part number though... I think I'll check in with someone from BMW on this one...

But agree that I certainly don't want to be scrimping on £100 for all that extra power/risk of ruining the lump!!

Thu Feb 20, 2014 7:49 pm

That's gone straight over my head Will!!

Fri Feb 21, 2014 7:27 am

Cool cheers Lad,

Fri Feb 21, 2014 9:37 am

Get an EndTuning Chip, £60 and prob see around 300bhp.

Sat Feb 22, 2014 3:01 am

I run the 4l afm and done over 40 drift events with the 3l ecu and i mean bashing the limiter flat out 3rd/4th its never missed a beat, i can confirm it works driving hard lol and it mae 298bhp on rollers without a chip