Recenly, I install this on my ITE RX-7. and from what I heard you need to use Diff cooler on this type of Final drive special if you have Torsen LSD. But Recenly when I call ISC and Speedsource INC. They told the Diff cooler is no need for A Regional type of Race.? Did any of IT Fourm member run 5.12 final drive without pump? I Still plan to put the pump in near fucture, but since I am only testing my car setup right now( i will do only about 10-15 min of Testing each time) just wonder can I got away with out using a pump. AND BTW what kind of temp is consider over heat for Diff 250+ ?

thanks for ur time
J