FGT heads... spring pressure...

[Gojira]

Does anybody know if the spring pressure on the FGT and GT500 heads is the same?

I know the exhaust spring pressure on the GT500 head is 72# closed with an install height of 1.550.

GT500 cam lift .393 straight across
FGT cam lift .438 in, .447 ex

 

[ModularFan]

Heads

# 37mm intake valves, 32mm exhaust valves
# Intake valve lift: 11.2mm, exhaust valve lift: 11.5mm

Cams are Increases lift from the stock 10 mm to 11.14 mm intake and 11.36 mm exhaust

 

[Gojira]

Heads

# 37mm intake valves, 32mm exhaust valves
# Intake valve lift: 11.2mm, exhaust valve lift: 11.5mm

Cams are Increases lift from the stock 10 mm to 11.14 mm intake and 11.36 mm exhaust

That doesn't answer my question.. I already know that. 11.14mm = .438"; 11.36mm = .447". I already wrote that in my first post.

My question was what is the spring pressure?

 

[birdman941]

Same valvesprings in both.