Quote:
Originally Posted by bandit86
By increasing the vacuum in the crank case you can do the same. I would no want full vacuum but a 5psi difference to atmospheric pressure would do the same.
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A high vacuum would be bad. Having about -5psi or 10''Hg is ideal.
Word on the street is a high vacuum pulls oil away from wrist pins. It would also cavitate the oil pump, before pressurized hydraulic oil tanks came along aircraft above 30,000ft could have their hydraulic pumps cavitate do to lack of absolute pressure on the return side.
You might be able to go as high as 15''Hg to 20''Hg on a non racing application. Monkeying with your oiling system is playing with fire, I took a risk by running low tention oil rings on my diesel and it seems my reasoning for needing standard or high tension oil rings was sound. (diesels dont need them because they don't draw much vacuum)
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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