Originally Posted by thedude

For years I worked as an engine builder for a top NHRA pro stock team, we used mainly LSM camshafts with oustanding success. I would not go to the added expense just for the name sake though, unless your budget allows. Their R&D and lobe designs are cutting edge, aggressive max effort applications that include NHRA pro stock, comp elimator and super stock eliminator. As far as keyway lifters they are also an exspensive investment, they do allow the valve train to be lightened dramaticlly over a conventional style tie bar lifter. It is really a question of application in an all out cubic inch limited class where every little thing adds up I would go to the keyway lifter. I have run the Jesel keyed lifters in max RPM style NHRA comp eliminator engines and high end cubic inch limited applications only where RPM and lightened valve train is a must. High horsepower-large displacement, nitrous and high end braket racing stuff I just go with the conventional tie bar rollers. They are just as strong and more cost effective.