racing promotor
Moderator
Didn't change rf camber but did move my rr in 1/4 inch. seemed to solve the problem. Tried a new set of wheels this time with correct stagger. Was like a new kart. Handling is much better but still having some rear wheel hopping on exit. Getting conflicting input. Some tell me the wheel hop is due to too little air and kart is too tight and I should go up in air pressure. Others tell me it is the opposite. That the kart is loose and trying to grip. Which is it? Secondly, having trouble getting motor to turn. ran 15-66 and only got 6300 rpms. went up on air pressure and to 15-68 and got 6600 rpms. everyone else is turning 15-64, 15-65 and turning 6800. My motor doesn't seem to be able to do that. Thought it was the timing. have cl3 cam and billet flywheel with built in 32 degrees, with a stock key. In my motor however the stock key gives me 34 degrees. I tried retarding the timing with a number 2 key put in backwards, but motor only turned 3800. Everyone told me to advance the timing using a number 7 key. I tried that and with 15-66 motor would only turn 6100. with 15-68 and more air it turned 6600 but I was way off the pace. Any ideas as to where my timing should be?
You'll NEVER turn RPM when kart or tires or both are not right, loose has nothing to do with the hop, they might be just not explaining themselves properly, the hop is the tire grips releases grips then releases creating a rhythm thus the bounce, just the fact your chasing RPM and the kart is hopping tells you it's to tight, I'd say your giving credit to a change that did nothing moving the RR in did not help it was the stagger change the helped, test by moving RR back out, bottom line you need to free it up to get rid of the hop, little more left maybe, lower VCG maybe, but you need to increase the RF camber also.
Put a 15-65 on it and let it alone FORGET about the motor and gearing for now or you'll chase your tail for months, let the gearing alone and fix the chassis set-up the RPM's will follow.
Good Luck !!