Scavenge Pump + Restrictors

brady_f

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Sep 5, 2007
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789
Location
Houston, Texas
Started my new build up for the first time yesterday and found oil pouring out of the downpipe’s. Called Precision and they chalked it up as a drain problem. Can someone please double check the set up below and verify I should not have restrictors on?

Precision Twin 62/66’s
6AN Feed split to 2 x 4AN Feeds to Turbos
10AN Drains fed into Scavenge Pump plumbed directly into the oil Pan

I did order a TurboWerx EXA Pump yesterday which should increase flow back to the pan, however it seems the consensus is .060 Restrictors for journal bearing turbos.....thoughts?


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Nightmare302

OhChuteRacing Owner
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Jan 11, 2004
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Location
Lawrence Kansas
Precision will tell you to never run a restrictor. They also suggest a 3an. My first one pushed oil they said fix the drain make it a straight shot but I kept having issues. The tech then told me if it keeps doing it use a very small restrictor. After it failed again and started pushing oil they claimed I starved it.
 

BADASS03SVT

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Oct 25, 2003
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13,021
Location
MA
Whats oil pressure at idle?

My motors have always been higher than typical setups. Have to take that into account also.
 

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