I have an '89 GTA with the L98, 6psi Paxton, TPI, 700R4, 58mm throttle body, Hooker headers and stock heads. Gear ratio is staying stock (3.27) I was thinking the LT4 Hot cam might be good, but not sure. I am going with forged pistons and having all the machine work done now. I would like to stay just over 20mpg HWY; I don't want to compromise fuel economy too much. Appreciate any suggestions or forwards to good articles on the subject...cam selection is not my area of expertise. Thanks guys.

 

You should get a custom grind that works efficiently and is designed around your Paxton setup. You'll pay the same regardless, so you might as well get something that is built around your specific application.

 

A cam change in it's self doesn't produce much as a matched parts sum of the total does in heads,compression matching cam,intake,exhaust.
The situation you have does however requires,as it does on any power adder,a cam without much overlap to capture what the power adder should be doing for you.You'll find the many of the super charger cams are relativity mild.Really don't want to spin those engines very high or add to the lift with higher rocker ratio rockers.A good set of roller rockers is never a bad investment,but keep it at 1.5's.

BTW gap the rings for a super charger application.The top ring gets hotter than with N/A and needs to have a wider gap to prevent the ring ends from butting against each other.Some of the good piston manufactures lowers the top ring for super charger pistons and that helps,but you still need to widen the ring gaps.

A cam manufacture that I am a fan of is Howards.A very good company to work with.

You spoke of forged pistons and I hope your thinking about forged rods.Most think of forged rods for a high rpm application,but in terms of a super charger the rods at a lower rpm do take somewhat of a pounding.Notice I didn't say anything about a forged crank,so play it on the safe side in terms of the amount of boost.