Works for me, fire when ready. I'm running 35 percent (until you tell me that's too much or something in which case I'll change.) The car handled like a dream, just didn't have the oomph needed to get the job done. Carb was tuned pretty well and my gearing seemed on the money, just no pop out of the motor with the current shim. Beyond that, I have eight plugs left, so give me an idea on shim and I'll try it and hope I figure it out by plug number seven![/QUOTE]
35% Nitro is OK but most have dropped to 25% for extra mileage , for that nitro percantage you'll need around .030" to .032" gap at the squish band for current Nova motors , checked with solder or an indicator making sure to do the correct math compenasating for the piston bowl. FYI lack of punch could also be greatly affected by header length , pipe type , clutch setting and of course carb tuning.