Hello Kevin, nice to hear from you! I
have a set of FRPA40 Dellortos from the Alfa6 and thought of using the throttle part, but little
adaptor manifolds would have to be made, as the 3liter heads are different on the intake side. This would be more trouble for me, than finding ITB's.
As far as high power cams for the 12v go, I could use my own JK303 12mm profile which works great on the 2liter Nord. After all, they are both 500cc cylinders with
same intake valve sizes. We are not much concerned with emissions, but on the other hand, I think these 303* cams should be about the
max to be used with the 3liter. For people with emission concerns, things are more difficult obviously. The C&B S2 11mm cams for example, may give some good 'fast road' performance, but as far as HC go, I could not reduce them below...1500ppm, a
huge number. Studying the cam profiles in detail, revealed that the ovarlap
area was unduly large. It is possible to design a performance cam with proper characteristics for the job but then again, the 12v exhaust rocker mechanism would not tolerate high acceleration ramps without
pronounced lobe wear, we all want durability don't we? While the Nord and the 24v engines can serve dual duty (street/track), the 12v owner must be prepared for exhaust lobe wear,
unless they opt for lighter 8mm stem SS exhaust valves, going from 81gr of weight each,down to 69gr! (The same change for the intakes, will take you from 108gr to 80gr!!). Now, if someone
really wants to go lighter, they can remove metal from inside the
exhaust followers-a lot of it! Then, you're talking about high rpm reliability for the 12v and
no cam-lobe wear!
Right now I'm messing with the 12v head flow, discovering some interesting things...All in all, I'm glad the 24v is around!
1,5kg flywheel? Are there any balancing/torsional imbalance problems with the rear (clutch) flywheel? Very interesting!
Keep up the good work, I hear about it once in a while!!
Jim K.