<font face="Verdana, Arial" size="2">Hello,

A few months ago, I purchased and installed one of your 25% underdrive crank pulleys onto my SBC 350 (v-belt). It is the 3-groove version, though I no longer have AC... I am very happy with the gain in performance I've noticed while going up through the rpms, and while I do not have a serious drop in voltage at idle, I do have a problem. My temps climb like crazy when I sit in traffic (it's fine on the highway). Since I've replaced the thermostat, gone to a Griffin radiator, replaced all the hoses, and run a high volume water pump (Stewart), I can confidently assume it is the water pump pulley that is not spinning fast enough. Currently, I see my only option is to go back to a stock sized crank pulley...

Do you make a water pump pulley that will effectively increase the amount that the pump turns? Like a 25% "overdrive" water pump pulley. I realize that this may defeat the whole purpose of the "underdrive" crank pulley, however, I am willing to take that chance if it means I can still use my nice crank pulley and will no longer risk overheating in rush hour traffic.

Thank you,

Ray

PS- This is a 1984 Camaro with a pre-87 350 SBC. I have electric fans and only run power steering, smog pump, and an alternator. I think my water pump type is a "long" style (Stewart high volume brand). </font>

<font face="Verdana, Arial" size="2">March #6191 7" crank pulley.</font>