I am installing a set of these cams along with the crower dual spring/titanium retainer kit in the near future (engine out of the car), and am wondering whether there are any piston-valve, valve-guide, rocker, or other clearance issues I should worry about. The spring kit comes with a sheet that warns about not checking every clearance, but is this really an issue with this setup on a 91 b18a head? Or are these just generic concerns with upgraded valvetrain? Thanks for any input.

 

These concerns are basically generic concerns, as it wouldn't be smart for Crower to market a product that has clearance issues with a stock motor. I wouldn't worry about it with stock pistons, but if you upgrade to higher compression pistons, then definately check everything.

 

Forgot to add that I'll be using lower compression (CP 9:1) pistons for a turbo setup. This would seem to give me even more of a safety margin as far as piston to valve clearance is concerned with the increased lift. A fair guess?