69 Firebird Electric fans and fuel pump

[GregWeld]

Originally Posted by av8or32

i've got my eye on a 16"x16" s blade that moves around 2000cfm. Will I be good with that and a Painless relay kit. Also, the kits come in two temp ranges. 200 on 185 off and 185 on and 175 off. Which way would you go?

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 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.

[GregWeld]

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.

[Vegas69]

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.

[av8or32]

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

[GregWeld]

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.