LSA Question

A cam upgrade from stock is still a good idea. The factory cam balances a bunch of considerations, having nothing to do with good power and torque production.

A mild cam, under say 215@50, will significantly pick up midrange torque and allow it to rev out nicely to 5000+. Without sacrificing much at all on off idle response.
Especially when you add say 0.030" lift in with that cam timing. As with any cam swap, piston to valve clearance must be checked. This can be done without removing the head by putting #1 on TDC and putting air into the cylinder to hold the valves shut. Then the valve springs can be replaced withight checking springs. Remove the air pressure and put the rockers back on. The closest exhaust will be about 10° BTDC and intake will be about 10° ATDC. A dial inducator on the edge of the retainer and push down on the rocker over the valve stem will indicate the clearance. You may have to check a few degrees before and after the 10° point mentioned.