Vacuum pump and maximum "safe" vacuum
#11
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If your just racing it you can 10-15 no issues. If it's gonna be ran for long duration keep it around 10 max. 7 is safer. Gotta say I've never seen an oil filter crumple. Biggest issue with running them long duration seems to be the wrist pins dry out and top ring wear. Being in a vacuum the oil drops back to the pan very efficiently and there is next to zero oil mist that would otherwise be there. Crank seals don't last as long either.
As for the bearing issues he had previously, I doubt that had anything to do with the vac pump.
As for the bearing issues he had previously, I doubt that had anything to do with the vac pump.
One of the great things about a vac pump is the engine doesn't leak any oil, when running. I get a drop or 2 after I turn it off now.
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articfriends (05-04-2022)
#12
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I’ve collapsed a few filters with jaw and/or band type filter wrenches trying to take off filters some knumb nutz installed way too tight. :wink You know, when you should have stuck a big flat screwdriver thru it 15 minutes before hand. Lol.
i can’t see any either way a filter would crush in. It’s not from a vacuum pump. Oil psi inside at 50psi -100psi. Maybe vacuum of -150 psi ? Don’t think so.
i can’t see any either way a filter would crush in. It’s not from a vacuum pump. Oil psi inside at 50psi -100psi. Maybe vacuum of -150 psi ? Don’t think so.
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https://knowhow.napaonline.com/what-...lter-collapse/
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articfriends (05-05-2022)
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I’ve collapsed a few filters with jaw and/or band type filter wrenches trying to take off filters some knumb nutz installed way too tight. :wink You know, when you should have stuck a big flat screwdriver thru it 15 minutes before hand. Lol.
i can’t see any either way a filter would crush in. It’s not from a vacuum pump. Oil psi inside at 50psi -100psi. Maybe vacuum of -150 psi ? Don’t think so.
i can’t see any either way a filter would crush in. It’s not from a vacuum pump. Oil psi inside at 50psi -100psi. Maybe vacuum of -150 psi ? Don’t think so.
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articfriends (05-05-2022)
#16
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The only way the "Outside" of the filter can could be crushed inwards is if they ran the oil pump dry at high sump vacuum. Leaking pump pickup tube or pickup was not submerged - either of those would do it.
That would also explain bearings into the copper.
That would also explain bearings into the copper.
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#17
Could also explain the collapsed piston skirts. Wonder if someone got in a rush and forgot to put oil in. Or they flushed the motor between pulls with ice water and forgot to put water back in the cooling system.
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articfriends (05-08-2022), mcollinstn (05-08-2022)
#18
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Hard to know, they ran a carb with jet extensions in the FRONT and didnt know better, they revved engine '8200" even though the 280/800 lift roller cam is done by 7000, they set motor on pan. I built them 4 th-400s for there 4 trucks, 2 were for low hp 500-700 range so they didnt get ultrabells or aftermarket cases. They already brought one back with the bellhousing broke and asked if I missed that when I was rebuilding it as they say they never bolted it on a engine , LMFAO, there was a huge gouge in dowel hole where they rammed it on not lined up so ANYTHING is possible! I sent owner a picture of a titanium retainer in my lathe that I was doing a tiny cut on inner step, his answer back was "those new lifters look really nice"
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mcollinstn (05-09-2022)
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