Lets talk about FD oil pressure regulators

[TitaniumTT]

Isn't that more of a relief valve to keep the pressure from spiking throughout the system? IIRC the regulator that most people toy with is at the end of the line, where it should be, but extremely high pressures, cold start for example, would overpressurize everything before the OPR in the rear iron had a chance to react?

[RETed]

Technically, the rear OPR is a relief valve.

The front one is set around 150psi, IIRC?

It has to pump through the oil cooler (and lines), so that's why it's set so high?


-Ted

[diabolical1]

Originally Posted by TitaniumTT

Isn't that more of a relief valve to keep the pressure from spiking throughout the system? IIRC the regulator that most people toy with is at the end of the line, where it should be, but extremely high pressures, cold start for example, would overpressurize everything before the OPR in the rear iron had a chance to react?

your posts have actually now given me some insight now into why my pressures on that motor reacted with increased RPM appropriately, but started to fall off shortly afterwards. all this time i thought it was the modifications i made to the e-shaft jets. now i'm thinking i might have simply blown out the front cover o-ring.

if i recall, that front regulator bypasses at 156 psi from the factory, it usually gets shimmed when you use the high pressure rear regulators.