oil pump deadheading?

[doobie]

doing some tests on my near new (25-35miles) walbro fra-4 oil pump. have it hooked up to my buddies journal bearing silber turbo kit and it seems to deadhead and slowly stroke (every 4-5 seconds) its returning but not as hard as i would like to see it. what would cause this? pump just rips oil out when its not hooked to a turbo. im almost positive when it was hooked to my sled last year it chugged along not deadheaded.

 

[doobie]

i see there some smart fellas looking at this. any ideas?

 

[kgra]

Check the oil drain hose out the bottom of the turbo isnt kinked or plugged.

 

[doobie]

thx. i think i found out what the deal is. the walbro seems to be a more econiomical pump. it strokes a 1/3 as much but still delivers to same amount of return oil out the turbo as the "napa" pump. i was kind of expecting it to return as hard as it pumps but i guess thats not the case with a journal turbo.