DZL JIM
Member
I'd like to hear from anyone running 300, 350, 400 cc size hybrids, turning over 4k rpms, and what your low pressure oil pressure is.
I have an issue that I am trying to figure out and I think it's the HPOP.
At the end of a 1/4 mile run the low pressure oil drops below 10 psi for several seconds and the engine runs real rough, and often dies and is hard to figure back up.
Some info:
I have 300/200% Hybrids and I am turning 4400 rpm though the lights.
I have a large single HPOP (nameless right now as I am not 100% sure what's going on.)
The datalog shows 3800 psi of HPOil pressure during the whole run.
Low pressure oil shows starting at 65 psi or so when I leave the line and drops a few seconds after launch to about 35 psi, and stays steady unit it then drops suddenly after I let of the throttle at the end of the run. It recovers by the time I am at the end of the shut down and enter the return road, where the engine runs very rough, if at all.
I was thinking I had a low pressure issue, but believe I am now experiencing other High Pressure Pump issues that I am suspecting have been my problem all along. I am thinking the HPOP is drawing the low pressure system down, somehow. The pump is still turning 4400 rpm (or whatever the ratio is) when I let off so it's still moving a LOT of oil that has to go somewhere.
Anybody else experience anything like this?
I have an issue that I am trying to figure out and I think it's the HPOP.
At the end of a 1/4 mile run the low pressure oil drops below 10 psi for several seconds and the engine runs real rough, and often dies and is hard to figure back up.
Some info:
I have 300/200% Hybrids and I am turning 4400 rpm though the lights.
I have a large single HPOP (nameless right now as I am not 100% sure what's going on.)
The datalog shows 3800 psi of HPOil pressure during the whole run.
Low pressure oil shows starting at 65 psi or so when I leave the line and drops a few seconds after launch to about 35 psi, and stays steady unit it then drops suddenly after I let of the throttle at the end of the run. It recovers by the time I am at the end of the shut down and enter the return road, where the engine runs very rough, if at all.
I was thinking I had a low pressure issue, but believe I am now experiencing other High Pressure Pump issues that I am suspecting have been my problem all along. I am thinking the HPOP is drawing the low pressure system down, somehow. The pump is still turning 4400 rpm (or whatever the ratio is) when I let off so it's still moving a LOT of oil that has to go somewhere.
Anybody else experience anything like this?