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RE: Questions about'86 4KQ mods

   Questions from a newcomer... 
1-If I want to turbocharge my new 80,000 mi. '86 4KQ, is it advisable to
use a turbo from another Audi 5 cylider engine...it would seem to be a
simple switch...or are there other, better applications available? (I don't
notice many people on this list w/.tubocharged 4ks...too crowded under the
hood? Transmission can't handle it? You'd think it would be a common
modification. Or is it better to start by opening up the exhaust system?)  

Best bet is to upgrade to the ur-q, they are very reasonably priced for the pre-1985 cars. The cost of upgrading to the ur-q may very well be lower Vs trying to 'add a turbo' to the 4KQ, plus you get all the benefits of the better suspension, big tahrs & wheels, those awesome flared fenders, etc. The add-a-turbo approach with the 4KQ can and has been done, but, it's not a practical or inexpensive upgrade, if it were you would see a lot more of them here.....

2-Any suggestions on firming up the suspension, different tires..street use
only? I just bought the car; it's currently set up stock...too much body
roll, too much rebound. 

The ur-q upgrade addresses these issues very well, though there are excellent upgrade options of the 4KQ suspension at reasonable prices. #1 suspension upgrade for the 4KQ would be the Koni adjustable struts, IMFO.