Hiya Gripo
cheers for that, thats what im thinking too.
Autosprint cam is a regrind by Autosprint in Coleshill, nr Birmingham. They did all the balancing on my engine and rebore etc. I havent got the specs of the cam, it was all abit a) hush hush b) above my head anyway lol. The guy at Autosprint, Geoff, looked at the silvia engineering cam (i assume Piper) that was in the engine i blew, and worked from there. its deifinitley different to the eye than the Piper and has non-symetrical lobes with a flat on the downside of the lobes. Dunno why, its a trick they used on ford pinto profiles amongst others. A few of the guys that have fitted them since, have noticed the engine bretahes better at the top end of the rev range and stops that slightly strangled feel. Ive never measured the lift or duration etc or done back to back with teh piper, but it works very well in my engine. its a bit more expensive i think than the piper, about £120 iirc. Turbomike has one for sale i believe if you PM him.