a tiny little one tube and fin cooler..it couldn't have been doing that much for keeping it cool. I could sit with the motor hitting the rev limiter, then blast down the road at 70mph it never got so hot that it became "notchy" like the PSC pumps did when they started getting hot. Maybe I've had good luck, I just know of a few others running LS1's with stock pumps and no complaints.blacksheep10 said:the trucks run P pumps still, the cars run tc pumps. I was putting O'shitty's repop'd tc's on the race buggy, but I guess it didn't have enough inflow from the cooler. they were burning up right away. were you running a cooler greg?