Not sure if there is a hard number or not, but I need to know what kind of oil I should be looking for.
I put a bigger cam in a 305 for my plow truck and upgraded the springs accordingly
It is a hydraulic flat tappet cam with 260/260 advertised duration 204/204 @ 0.050" lift. It has .427" lift at the valve.
The springs are 358lbs/inch. They have 125lbs on the seat and just shy of 300 lbs at lift with this cam.
So the cam isn't wildly aggressive, but moderately so (with regard to cam intensity, not duration). The springs aren't "bone crushing" but they are quite a bit more than stock.
What should I be looking at for oil? I'd like to stay with a 5w30 because this is a winter rig, so that makes it harder.
From what I've found, 800ppm is inadequate for these spring pressures. But I don't need a race oil with 2000ppm either.
Any ideas where I need to be for ZDDP?
I put a bigger cam in a 305 for my plow truck and upgraded the springs accordingly
It is a hydraulic flat tappet cam with 260/260 advertised duration 204/204 @ 0.050" lift. It has .427" lift at the valve.
The springs are 358lbs/inch. They have 125lbs on the seat and just shy of 300 lbs at lift with this cam.
So the cam isn't wildly aggressive, but moderately so (with regard to cam intensity, not duration). The springs aren't "bone crushing" but they are quite a bit more than stock.
What should I be looking at for oil? I'd like to stay with a 5w30 because this is a winter rig, so that makes it harder.
From what I've found, 800ppm is inadequate for these spring pressures. But I don't need a race oil with 2000ppm either.
Any ideas where I need to be for ZDDP?