Hi All

[u09521]

I'm no camshaft expert, but what I've heard long duration cams like the 649 (300 degree) cams are not well suited to altitude and perform better at the coast. Maybe you should chat to a few mini experts or mini racers in Jhb to advise you on cam shafts. I know of some very quick race minis in Jhb that use cams with less duration than the 649. Btw what compression ratio you running? I would think a 649 would require a very high compression to get the most out of it.

Hi Dion, I've seen a Mini over the weekend with a 649 in Jo'Burg and it went very well. My compression ratio will be 10:1:1

Thanks
BTW my calculated CR is  10.27 - 10.43 depending on the figures used for dish volume and gasket thickness.  The pistons that came with the motor are 21251 Hepolite so I didn't want to push it any more.