M52B28 power run

[Andyboy]

Fingures crossed we will find a solution to the hitch over the next couple of days and reassure you with what the Unichip and your M52B28 is capable of.

Sorry Ste, I read this as saying your car has a Unichip. I read wrong!

Not all E36's have Siemens ECU's but I think you're right about M52 EWS stuff. I think this one is from a 1994 320i but it might be from Dave's 316i. I recall replacing a Bosch DME unit with a Siemens unit on a 1992 non Vanos car and wondering if it would work!



Judging by your power runs it doesn't look as if there is THAT much more to come. It looks good.
I see what you mean about the Unichip but it would be worth getting your existing ECU checked for fault codes before doing anything else. You'd be surprised how many fault codes our silver one had and once cleared it made for a much nicer car.
I drove a 2.8 powered E30 recently and it was just electric. To be faster that Oz's 2.7 takes some doing!

[ste]

it would be worth getting your existing ECU checked for fault codes before doing anything else. You'd be surprised how many fault codes our silver one had and once cleared it made for a much nicer car.

I had a few fault codes after initially installing the engine but they are all cleared now (I have Carsoft on my laptop) except for it flagging up that my exhaust flap isn't functioning...

[ian332isport]

except for it flagging up that my exhaust flap isn't functioning...

That's one thing we probably can fix with a resistor

[M5pilot]

Ref- Compact 2.8 graphs on linked thread:

The first graph shows a intake and ambient temperature difference of 5 degrees before the remap. This is perfectly acceptable

Then, after the remap has been done the temperature difference is 29 degrees!!

So, the engine is making + 16 bhp after a remap even with such a massively high intake temperature?

Sorry to come accross as a doubter here but given Ray's immense fan setup I cannot see how the hell he is getting such a high intake temperature.

My Dastek fan is very powerful but nothing like Ray's 'wall of power' and I can quite easily get an intake temperature of within 5-10 degrees of ambient.

Temperature compensation would play a large role in the gain in power.

As for Unichip - it is a brilliant tool simply because it allows 'live' changes. The new Uni-Q is a masterpiece and alot of very serious tuners are now taking it on.

The stock ECU's are indeed a very powerful tool but live mapping them is something that requires not just a very expensive emulator but a real understanding of the way the ECU works.

A majority of M52B28's came with the Seimens MS41 ECU.

[reggid]

Ref- Compact 2.8 graphs on linked thread:

The first graph shows a intake and ambient temperature difference of 5 degrees before the remap. This is perfectly acceptable

Then, after the remap has been done the temperature difference is 29 degrees!!

So, the engine is making + 16 bhp after a remap even with such a massively high intake temperature?

Sorry to come accross as a doubter here but given Ray's immense fan setup I cannot see how the hell he is getting such a high intake temperature.

My Dastek fan is very powerful but nothing like Ray's 'wall of power' and I can quite easily get an intake temperature of within 5-10 degrees of ambient.

Temperature compensation would play a large role in the gain in power.

As for Unichip - it is a brilliant tool simply because it allows 'live' changes. The new Uni-Q is a masterpiece and alot of very serious tuners are now taking it on.

The stock ECU's are indeed a very powerful tool but live mapping them is something that requires not just a very expensive emulator but a real understanding of the way the ECU works.

A majority of M52B28's came with the Seimens MS41 ECU.

Yep, thats why i mentioned it. Its probably worth 5% and given that the gains appear to be unirorm across rpm this further highlights this. The placement of the intake probe is a real problem with DD dynos is so easy to get false temp readings both accidently and deliberately.

[ShepsEvo3]

Ref- Compact 2.8 graphs on linked thread:

The first graph shows a intake and ambient temperature difference of 5 degrees before the remap. This is perfectly acceptable

Then, after the remap has been done the temperature difference is 29 degrees!!

So, the engine is making + 16 bhp after a remap even with such a massively high intake temperature?

Sorry to come accross as a doubter here but given Ray's immense fan setup I cannot see how the hell he is getting such a high intake temperature.

My Dastek fan is very powerful but nothing like Ray's 'wall of power' and I can quite easily get an intake temperature of within 5-10 degrees of ambient.

Temperature compensation would play a large role in the gain in power.

As for Unichip - it is a brilliant tool simply because it allows 'live' changes. The new Uni-Q is a masterpiece and alot of very serious tuners are now taking it on.

The stock ECU's are indeed a very powerful tool but live mapping them is something that requires not just a very expensive emulator but a real understanding of the way the ECU works.

A majority of M52B28's came with the Seimens MS41 ECU.

Yep, thats why i mentioned it. Its probably worth 5% and given that the gains appear to be unirorm across rpm this further highlights this. The placement of the intake probe is a real problem with DD dynos is so easy to get false temp readings both accidently and deliberately.

Sal, Reggid, I have just had another customer with an expensive remap done on his car by "said" tuner. The dyno plot he had before and after looked impressive, but was close to 20bhp down on our dyno on what was shown on that plot from "said" tuner. The difference was a very high intake temp. I really hope "said" tuner does not carry on this practice as it doesn't only give him a bad name but also makes it harder for us to gain the trust of the customer.

Ste... I have an answer referance your old style Unichip and what we experienced while trying to map it. But I'm unsure whether to post here. I will pm you and you can post up if you feel fit mate

[Demlotcrew]

May i just add that even with the impressive figures by the 2.8 i feel that it lacks a power band.

I think that an inlet cam is needed badly on this engine.

Andrew

[tim_s]

That's a great result! Can't wait to see it after some ign tweaks
Ste, what exactly has been done to this engine?

[ste]

Ste, what exactly has been done to this engine?

Details of everything that's been done are here: >Click<

Essentially is an M52b28 from a '98 E36 328i (pre traction control).

It's had the inlet manifold from an M50B25 fitted along with a bored M50B25 throttle body. Maybe worth noting, when people fit the M50 manifold and throttle bodies to E36 328s they usually use a bored M52 throttle body which has offset inlet/outlet and has to be bored from each side and has a step - by using an M50 throttle body I have a single larger bore with no step. The chap that does the kits usually offers the bored M52 bodies so that E36 owners can still use their original heater hoses, throttle cable etc. As mine was custom in the E30 anyway I could opt for the better flowing TB.

Other than that it's just got a large ITG foam filter, a 255 lph fuel pump, an underdrive pulley on the waterpump, viscous fan removed, an M20 flywheel and a BTB modified manifold and full 2 x 2" system with an X pipe (and obviously no cats).