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I dont try to pull a high vacuum. I figure tires are made to hold pressure in, not the other way around.
I put the air powered vacuum pump on it and let it pull air out till the side walls suck in a little bit.
Then it takes a lot of CO2 to bring them up to 30psig.
So far they have been holding CO2 like a champ.
Next step will be to bleed the CO2 down to 15psig, then bring it up to 40psig with R-404a.
Next time I fill with CO2 I will weigh the bottle before and after.
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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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