Ordered the kit, built it, had to troubleshoot a bit, modified the B35 in the car by adding the necessary 60-2 wheel, RF sensor, TPS etc., reworked the harness, and it started up first try.
Got back from TX and spent the morning tuning the car. It runs a lot stronger than it ever did with the Motronic stuff. The 745i ecu, the 059 and 061 ecus. Plus the AFM replacement thing from Split Second. This was with the B35 head and pistons, 3inch exhaust, etc.
The 6psi now is way different than the 6psi it had before. Impressive for a D. I. Y. kit.
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Megasquirt Finished
Thanks,
It "started" on the first try but tuning it took another couple hours
But it was good to learn how to tune it.
The Megasquirt I used was MS2 with the Version 3 board. I had read about the MS1 on the V3 board that all of the e30 guys are running but decided that the "extra" part will catch up soon enough to the MS2. "Extra" for them are the other mods that have made it to the MS1 unit: Distributorless wasted spark, Boost control, fan controls, water injection, Tach output, etc.
I currently have an MSD box and coil running the ignition and I have not had any problems. I even hooked up the Blaster coil directly to the MS unit and it sparked fine. You can even connect the stock BMW coil to the MS and it will spark. Advance and dwell are controlled in the MS unit.
The only non-BMW sensor I used was the GM Intake air temp sensor. Everything else is a BMW part. I was able to graft the pigtail MS wiring harness to the BMW engine harness without an issue. I retained the connections to the fusebox , the Main and fuel pump relay. Very simple. The only bad part is that the BMW TPS is noisy and it did take a little extra tuning to keep the accel enrich code in MS from kicking in. This or I have a faulty TPS.
Also if you are going to build it yourself invest in a good soldering iron, solder and plenty of soldering wick.
It "started" on the first try but tuning it took another couple hours
But it was good to learn how to tune it. The Megasquirt I used was MS2 with the Version 3 board. I had read about the MS1 on the V3 board that all of the e30 guys are running but decided that the "extra" part will catch up soon enough to the MS2. "Extra" for them are the other mods that have made it to the MS1 unit: Distributorless wasted spark, Boost control, fan controls, water injection, Tach output, etc.
I currently have an MSD box and coil running the ignition and I have not had any problems. I even hooked up the Blaster coil directly to the MS unit and it sparked fine. You can even connect the stock BMW coil to the MS and it will spark. Advance and dwell are controlled in the MS unit.
The only non-BMW sensor I used was the GM Intake air temp sensor. Everything else is a BMW part. I was able to graft the pigtail MS wiring harness to the BMW engine harness without an issue. I retained the connections to the fusebox , the Main and fuel pump relay. Very simple. The only bad part is that the BMW TPS is noisy and it did take a little extra tuning to keep the accel enrich code in MS from kicking in. This or I have a faulty TPS.
Also if you are going to build it yourself invest in a good soldering iron, solder and plenty of soldering wick.