I am building an A4 based, all forged, Kenne Bell supercharged, 336 stroker and am trying to decide between 28oz and internal balance. Would it be worth the extra $100 or so to go internal balance? Plus I'd have to buy a new balancer cause I have 28oz right now. Just looking for some input.
If you plan on going over 5500rpm its worth it IMO. Does your balancer have a removable wiegth? Also remember you need the correct balance flywheel/flexplate.
I'm running a very similar combo to what you're shooting for. I run the Dart block as opposed to an A4. From the high RPM standpoint, you'll probably not need zero balancing (you just don't have to spin very high with a KB).... being smooth through the ENTIRE RPM range is definitely worth the extra 100 bux though. You will def notice the difference between your externally balanced Ford block and an internally balanced one. The difference in harmonics alone will be very noticable.