CarolinaSS
New member
My engine specs are a 460cc with an ARC billet rod and flywheel, 7cc dished piston, jeremy Parsons ported head milled .080 with 40/33mm valves, 65# springs, 1.2 ratio Gage roller rocker arms, .307 lift 260 duration cam from NR, serpentine header, and a 34mm Mike Clements carb. I have a 4 disk viper clutch for it and I'm looking at gearing now to run 1/8 mile drag on a lightweight minibike. I was wanting to know approximate rpm's this motor should peak at with my cam and carb combo so I can get a starting point for sprockets. With my rider it should weigh between 250-300lbs total and I'd like to gear it so it could trap 80mph if the power is there and I want to have it run 80 around peak power whether it's 7000 or 8500 rpms. Everything is bought, just waiting on the 50" wheelbase drag frame to get here and only need to order sprockets. I know every motor is different but I'd like to know about similar setups from experience with the parts I have, I only need a starting point and there's nobody local to Dyno a big block. Thanks