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i have been talking to the guy at tbichips.com about building a GM based efi system for my 1641cc and he suggested a ecm and tbi from a pontiac feiro since the ecm's in them are a simple system. he can burn a chip to do away with knock sensor and egr so that would not need to be hooked up to the VW engine. I already have the throttle body, wiring and ecm from a 2.5 feiro and am trying to make an adapter to bolt it to my stock beetle intake. I have built a few stand alone tbi harnesses from factory harnesses from GM vehicles so i am certain i can make the wiring work in a beetle. i think the hardest part will be mounting the TB and converting the ditributor so the GM ecm will control the timing and of course getting the perfect chip burned to run the air cooled engine. i will have to install a return fuel line and a eletronic fuel pump also. Sorry for the book but this is my plan and i hope it inspires others or if anyone has any further info for me.
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