KH vs MC differences

[Stpndsmnn at aol.com]

I believe that there is a difference in compression ratio between the KH and
the MC.  I have always read that the KH is somewhere around 8.3:1 while the
MC is 7.8:1.  I know it doesn't seem like a big difference but it does make a
huge impact in off bost throttle response and in how quickly the turbo
spools.  Higher compression = better acceleration off boost and quicker
spooling.   That being said, the MC was a higher HP engine from the factory
because Audi used more boost (among other things)with the lower compression
on the MC.

I am currently using a KH bottom end in my CGT turbo project and it is
working out great.  I can hit 12 psi by 3000 rpm, and off boost the
acceleration feels just as good if not better than my CGT did in NA form.

HTH
Matt Kramer
'83 CGTt