under drive pulley's
 

i have a 1996 cobra svt and I put BBK under drive pulleys on it. Since doing so my car is running super hot. should I go back with the stock water pump pulley because it is smaller and will turn faster? if I rev the motor at higher RPM's it cools down but at an idle it heats up.

thank you in advance

I think before you do that I would flush the cooling system, install a 185 thermostat, and maybe have the fan programmed to come on a bit sooner.

Ive had 3 different cars with underdrive pulleys and never had a problem with over heating, so I think you have an underlying problem that needs addressed.

Most common issue when you need more rpms to increase cooling is a bad radiator that is clogging up.

^^^^^^^^^^^^^+1

Shoulda gone with steeda.

I don't really think a different brand of pulleys would make much difference. If you are overheating, try the new thermostat, and complete system flush, and make sure your fan is coming on when it's needed. Most likely the problem is a clog, or buildup somewhere.