M30b35 engine swap for the KILR5ER...dyno/turbo upgrade

Discussion pertaining to positive pressure E28s.
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russc
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Post by russc »

With the cut sping ~9.5psi max.

RussC
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Good & Tight
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Post by Good & Tight »

Nice power curve. The AFR's are really lean though. :shock:
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Rich Euro M5
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Post by Rich Euro M5 »

Good & Tight wrote:Nice power curve. The AFR's are really lean though. :shock:
Russ lives in California and must pass pretty strict emission standards.

In some counties in Texas we have extremely strict standards. We have to test for emissions until a car reaches 25 years of age, after which it's exempt. This is why I haven't gone FI on my '86 535i, it's my DD and I don't want to waste my time tuning for emissions. 2010 is the last year I have to SMOG my 535i, that's when FI becomes practical. I can SMOG in January 2010, get my sticker, and then go FI at that time.

Rich
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russc
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Post by russc »

I don't know why that is, my log reads it at 12.5, a full 1.5 point lower. Theres definately no detonation.

RussC
Good & Tight wrote:Nice power curve. The AFR's are really lean though. :shock:
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Good & Tight
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Post by Good & Tight »

russc wrote:I don't know why that is, my log reads it at 12.5, a full 1.5 point lower. Theres definately no detonation.

RussC
Good & Tight wrote:Nice power curve. The AFR's are really lean though. :shock:
The dyno 02 normally gives a 1.0 leaner read from the tail pipe and from the graph from 5k and up it's above 13.
Maybe the dyno 02 is out of whack. As long as the plugs don't show signs of detonating I guess it's o.k. Normally the afr line is flat through the boost range though.
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russc
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Post by russc »

Finally getting around to some house keeping on the car...
Got the AFM delete going finally, cut a 3" pcs of exhaust pipe 7 1/4" long I had lying around from the TCD exhaust install and painted with chrome paint....
Image

Will install tomorrow.

RussC
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Shadow
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Post by Shadow »

Sorry for the misunderstanding but you were running the AFM with the megasquirt? :shock:
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FirstFives Dictator
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Post by FirstFives Dictator »

Nice work!
You'll be a lot happier with it.

There's a cool trick that we used to use to make duct averaging sensors; it would be neat to try here if I can figure out how to explain it.

This patent explains it, but there's no picture

http://www.patentstorm.us/patents/4265115/claims.html
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russc
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Post by russc »

Nope,
System didn't use it as a sensor. The GM temp sensor was mounted in the downstream outlet tube months ago. It was just taking up space. Now it'll be out.

RussC
Shadow wrote:Sorry for the misunderstanding but you were running the AFM with the megasquirt? :shock:
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BATESY
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Post by BATESY »

looking good man. I cant wait to unlease my m106 on 10psi. just need to get though the wedding first :(

BATES
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russc
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Post by russc »

Well,
got these for a swap....
Image

Accel 48lb's. With these and 4bar regulator, 55lb equivalent. That'll support ~550whp.

Just need to get all this new equipment installed now.

RussC
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thos
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Post by thos »

russc wrote:
M535 E28 wrote:this is a common issue with m50,m52,s50,s52,s38b36/38 engines when used in e30/e28 chassis...so i think the same for the b35
the signal coming from the diff is the same for all bmws but, the e32/e34/e36 instrument cluster converts it before sends it to the ecu
OK,
Again, that could make sense, but.....

Looking at the schematics from BMW, it shows the speed signal from the diff going into the IC that runs the speedometer. The signal that drives the ECU, cruise control and OBC is a separate signal from that same IC. Is it conditioned, I don't know. If Im motivated enough, I might o-scope it and see what it looks like. Im 90% sure the Bentley shows the 528e w/150 ECU has the speed input to the ECU as un-connected. If thats correct or not, again, Im not sure. We would need to see a super ETA '88 to see if thats really the case.

If the 150 ECU is a pancake PCB setup like the older 059/080, then its probably very similar to those older ECUs but with updated software that is OBD-I(error codes and possibly live data). I know the 150/153 ECUs were a '88 interim ECU that bridged the gap to the later 173/179 fully OBD-I ECUs until the E30(M1.3), E36, E34/E32(w/V8s). My pressumption is the differences are minor in the software and large from the hardware.

RussC
A little resurrection to this old thread as it helped me troubleshoot a nasty limp mode problem due to a missing "Vehicle speed" signal coming to the ECU after an engine swap.

The speed output signal in E28 can be hijacked from the wire connecting instrum. cluster to the CC in so equipped cars. And indeed even newer ECUs, like the OBDII MS41.x Siemens is fine with the conditioning the old cluster/speedometer circuitry does with the signal originally coming from the diff.

I think it can be thus assumed with near perfect certainty that until as recently as late 90's BMW ECUs are fine with the vehicle speed input signal in an analog form. When I am rewiring this permanently, I'll check with a frequency meter hooked up and post some basic observations of the signal characteristics.
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