Clutch vs. Electric Fan

also make sure you've sealed off any place air can go around the radiator. the upper support and the top of the radiator, the sides if the mounting brackets aren't flush, ect.

i think your biggest problem is you race in Phoenix ;)

racing isn't the problem... its the street driving...

Apparently a clutch fan will save you 7-12 up.I run records stock 2 core rad with a clutch fan with my 410 in my 66 Dart.It runs very cool.Oh no thermostat either.Alls good after 180 passes.

see ive heard this also... but that is over a solid fan... and an electric would eek out that last little bit...

For my .02, I was running a clutch fan on a new Moroso water pump. My new pump's bearing pushed out at 5000 rpm's. Destroyed my very new rad and fan. Needless to say I went back to electric with my new rad.

of fun... what fan(s) are you running?