Reiter553

When running a crossover on BBC and CMI headers what is everyone doing as far as a thermostat goes, are you running no thermostat or a restrictor plate?

1BIGJIM

iTrader: (1)

Thermostat with two holes drilled in it. No blower..

Reiter553

What size holes allows enough cooling past the thermostat prior to it opening? 1/8" ?also what temp thermostat do you recommend?

endeavor1

iTrader: (3)

I have 3, 1/8 holes drilled in mine to get the water pressure right. Crossover and CMI setup.

veloc410

I have 4. 3/32

SB

iTrader: (1)

Okay, all crossover's aren't the same.
So...how does everyone list what they have and show how it's rigged ? I dunno.

seafordguy

I screwed with it for half a damn season. Drilling holes, restrictor plates, etc.....I got tired of dicking with it and went back to no stats. at least I know I'm getting a good flush when I'm back on the lift.

veloc410

I wouldn't go over 140 temp even though water isn't that warm the heads build a lot of heat . Drill the holes. Like i said im using 4 . 3/32 holes but going to open them up. Also cp has 120 high flow t stats for 40 bucks each.also seems like it takes a while for t stats to settle in . Maybe boil them a few times before installing them. Mine fluctuated around until i drove it a few times up to temp for a while