I didn't even know they made the Z-32 with a single turbo. I've never seen one, or even read about one. What year is it? How much horsepower do you think you have?

 

Welcome and you'll be glad that you found zdriver.net. What I would recommend in your situation is the following. First, if you have the money, get a z32TT. But only if you can get one in good condition, especially mechanically if you intend to upgrade it. It will be more responsive to mods and you'll love the extra goodies that come along with the z32, not to mention good looks (IMO). If not, you don't necessarily want to add another turbo to your z31. It would be better for you to add a single larger turbo and upgrade things such as intecooler and injectors, etc. That's how you're going to get the best preformance out of your z31. Good luck on your decision whatever it may be. Feel free to ask any questions, I'm willing to answer any. Personally, I have a Z32TT Stg III++, so if you have any questions about a TT or modded TT.

 

Check out all these links on this page.
http://twinturbo.net/ttnetlinks/links.aspx
Go through the performance parts suppliers and look to find what you're looking for. Have you tried posting over in the z31 forum as well? Ask what some of them have done as far as a turbo upgrade. Basically just search a lot. Also, try going to google and searching z31 turbo upgrades and realted searches, you should get some results. Good luck.

 

I agree with emo. If you have the $, just buy the Z32. I had a Z31 and there is no comparison. Fitting a Z32 into a Z31 would be a job and a half. You'd probably spend more $ fitting everything into the Z31, then you'd have to make it run right.