Anyone running custom EMS on an M50/S50 etc

[Jhonno]

Anyone whos done the M50/S50 etc conversion running on a custom EMS? Im not talking a chipped standard ECU!

Any probs uncovered?

[E30/M30]

Not done it my self to an M50/S50 but the best bet would be a piggy back ECU like the unichip.

If you go for a stand alone ECU you need to make sure it can control the VANOS and those are expensive(Motec) !

Andy

[Ryan Stewart]

Im also planning just piggyback. I just want to be able to change the fuel and timing maps for when I am running on 100 octane. I'll let the DME deal with the rest of the shit.

There is soo much tuning involved in running standalone. Barrett has been working on his for a long ass time. The nice thing is I get his coils because most OBD coils are odd impedences so its easier to pick them to go with your tuning.

Question 2 is why?

[Jhonno]

Not done it my self to an M50/S50 but the best bet would be a piggy back ECU like the unichip.

If you go for a stand alone ECU you need to make sure it can control the VANOS and those are expensive(Motec) !

Andy

arent you running one on your M30 swap?

[Jhonno]

Im also planning just piggyback. I just want to be able to change the fuel and timing maps for when I am running on 100 octane. I'll let the DME deal with the rest of the shit.

There is soo much tuning involved in running standalone. Barrett has been working on his for a long ass time. The nice thing is I get his coils because most OBD coils are odd impedences so its easier to pick them to go with your tuning.

Question 2 is why?

Throttle response, Economy, Power (not much more i know), flexibility for future mods..

I'm assumin that it would be much easier on a non VANOS...

[kylebes1]

The BMW DME is the most complex in the world. When they came out the ones for m50tu were years ahead, hell, look at the new m5, that thing's DME could run the Space Shuttle.

I would just use a piggy back.

[Ryan Stewart]

throttle repsonse?

The OBD1 DME is plenty fast and hardly a hinderance. The only thing between you and the throttle plate is a little steel cable. A piggyback will do plenty to give you control.

If you really want a peaky engine just get a non vanos and get cams. Bore and stay as underswuare as possible and get individual TBs. That will be all the response you need.

/edit: wait a second, you are in England. You have more than enough repsonse. Just get the damn S50B30.

[Jhonno]

Oversquare surely?

Which engine is the S50B30?! Im still trying to get used to all these engine numbers!!

[Ryan Stewart]

For you it would be the non-evo E36 M3. Over there yours had ITBs and such.

Sorry, I had that backwards. The oversquare design will be plenty rev happy.

[E30/M30]

Not done it my self to an M50/S50 but the best bet would be a piggy back ECU like the unichip.

If you go for a stand alone ECU you need to make sure it can control the VANOS and those are expensive(Motec) !

Andy

arent you running one on your M30 swap?

Yes but there's no VANOS to worry about.

It's going to be a big help to me when i swap over to the E28 M5 TB's as it will only need a remap to cope with the change.

This is the ECU that i'm useing

http://emeraldm3d.com/

Andy

[Jhonno]

Not done it my self to an M50/S50 but the best bet would be a piggy back ECU like the unichip.

If you go for a stand alone ECU you need to make sure it can control the VANOS and those are expensive(Motec) !

Andy

arent you running one on your M30 swap?

Yes but there's no VANOS to worry about.

It's going to be a big help to me when i swap over to the E28 M5 TB's as it will only need a remap to cope with the change.

This is the ECU that i'm useing

http://emeraldm3d.com/

Andy

ahh yeah emerald - good stuff!!

I know yours doesnt have Vanos btw was just commenting on the use of a custom EMS