JPCady

I will be buying a 1988 90 quattro.. I would like to get a 20v turbo head if possible. Can I put that head on that particular block?

has anyone done this conversion?

thanks for the help

Jake

Disco Stu

supposedly the oil passages do not match up therefore it wont work without some serious work

snoogins

NEGATIVE! I've tried that on my ur-Quattro, and it will not work.

cuatrokoop

not to start anything up, but if any of you have the R&T On Audi & Auto Union (1980-1986), go to page 95...

"Interestingly, Audi's director of R&D, Ferdinand Piech, says that the 4-valve cylinder head of Audi's rally car will bolt into the 5000S quattro, as will the 6-speed transmission."

note: 1986 5000S turbo quatto, this was pre-non-turbo quattro type 44 sedans, 1985 publication date.

snoogins

...The heads for the rally cars were speacially modified by Lehman Engineering, to accomodate a 5000 block cast from an aluminum alloy. I've tried this, and I assure you it will not work.

cuatrokoop

i figured there was a caveat...did you try the 7A head on an MC motor yet (more widely avail, almost identical to the 3B head), or just the older ur-q 10vt (forget the code off the top of my head).

squidix9

I don't know about which head will fit where, but the Audi Sport 6 speed fits on a 90Q iron block. Trouble is the 6 speed doesn't have a center diff, it's locked. So trying to maneuver at slow speeds, with sticky tyres, and on tarmac, requires a bit of muscle.

snoogins

They're identical. The blocks didn't change much from the WX to MC engines.