Frank B

That makes good sense, but what about the volume of air the turbo is moving. The turbo on a 4 is smaller than on a 6 or 8. And I think that is where we'll run into the fuel delivery problems.

I think I'll just do this with a EA82T, If I can find a good one. Thanks everyone.

Napa (precision) u-joint #812 worked in my 86 3 door.

Why is it that an EA82T can handle 12-14psi but the ER27 only 8 or so? I do realize that with more displacement comes more volume to pressurize resulting in lower boost levels or psi. But it isn't even a liter in difference?!? But I thought I read on here that the ER27 came with the 7.7 compression turbo pistons and a turbo ready ECM. Maybe I miss-understood?? Anyway, thanks for your input.

Yes, that helps a lot! what I have planned is a supercharger off of a high end import that I may be able to get cheap. It will require work and a lot of research, but hey, I don't even have an xt6 yet! So all I can do is research it! Thanks again.

If so, how much boost can one take before the fuel and ignition need to be tweaked?? I may have a project!