Hello everyone, need help.
Just built a 351w for my 68 cougar.
Around 450hp
When I get on it, it blows out antifreeze out of the cap.
I’ve got a 16psi cap on it.
Oem is 13 to 16.
Why would it blow out antifreeze when I get on it. ?
¾ throttle to full throttle is when it does It.
Runs cool
Idle for an hour, stays at 170 or so.
351w non roller block
Afr 185 heads
.021 copper head gasket.
11:1 compression.