Fuel injection likes heat in a motor - and despite our old fashioned beliefs... HEAT makes power... Also if you're running forged pistons - they like a little heat in 'em too - for "swelling" purposes :lol: I'm running a 195 thermostat in mine...

New Vettes are running the streets at 220...

Remember - it's not the temp you run at - it's the ability of the system to not let the heat get out of control... I don't want my heat to be like a yo yo - I want it steady eddie... a needle that doesn't move (much)... whatever the thermostat is - is where I want the thing to run.

Remember too -- you don't need the fans when the car is moving.... you only need them when there's no air moving...

Depending on what your motor is - and I didn't read the thread to find out -- I don't think 2000 cfm is going to be enough... I'd be up at 3000 CFM or very close to it. And yes - the painless relays are good ones.

2000 cfm won't cool 600hp. You need over 3000cfm especially with AC. Greg is correct, motors like heat to a point. However, injection and carbs are two different ball games. 180 is perfect with a carb where 210 will make it pissed off.

my motor's proabably putting out 300 or so at the flywheel.

I have an old saying I like to use about cooling and stuff like that...

Better to have it, and not need it... than to need it, and not have it.

Can't have too much cooling - that's what the old thermostat takes care of... It only allows enough water flow to maintain the temp... and electric fans are temp controlled - so if they're not needed - they don't turn on...

Nothing worse than being stuck in traffic - hot day - and that ole temp gauge starts the dreaded creep.