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Old 07-12-2011, 02:30 PM   #191
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Join Date: Feb 2007
Location: Australia
Posts: 1,817
My Ride: E46 M3 Turbo
Originally Posted by NickG@TechniqueTuning View Post
I guarantee you this project won't be getting a piggyback ECU whatsoever. It will run solely on the factory reprogrammed ECU. Heck, it ALREADY IS running on the factory ECU It was driven from NJ down to FL, with the turbo kit installed and functioning, using the factory ECU.

No offense, but your experience doesn't equate to my experience. I have been tuning turbocharged BMW's using the factory ECU and blow-through MAF system for nearly a decade. I understand how these systems work, as well as what it takes to make them work in a forced induction configuration.

Your description of the issues you ran into indicates a lack of this knowledge. As such, I understand why you're so skeptical about it. So just hang on a little longer until everything is done and released. You'll then see that with the proper software tuning, this project IS possible

And for the record, running a MAP sensor vs a MAF sensor wouldn't have solved the fueling issues you experienced. But that is a discussion for another thread
Yep your right. You would have heaps more experience than me. And it would be interesting to see if this car stays this way with more boost.

I don't see how you don't think a MAP sensor wouldn't solve fueling issues though. Even GTR's with multiple throttles have the same issue. That's why everyone tunes these TPS vs RPM off boost and switch to MAP vs RPM as boost comes on. Mine works beautiful like that now as well.

BMW E46 M3 Turbo 570rwhp @18psi (old setup)
BMW E46 M3 LSX 427ci 800hp N/A
Ultima GTR LSX 440ci 800hp N/A
VY SS Ute Turbo 1004.6rwhp @ 28psi E85
Ford Escort Mk2 2JZGTE 600rwhp @14 psi
04 Yamaha R1 154.3rwhp
ISUZU FZR550 tilt tray (GT35 Turbo)
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