Typical vacuum for 308
Comments
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I am running a PCV valve which makes a bit of difference, but I routinely run at 18-20" at idle (one caveat, not all vac gauges are equal, I try to go with a higher quality).
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I am swapping out my tredlevac for a modern vacuum booster that typically needs 18 in min. So wondering if I need to add an aux. vac. pump.0
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I would. I have a treadlevac and it works fine now but I know they can be troublesome.
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Dan, just installed a PBR VH40 booster on my '53 {1450 psi @ 20"hg}. You will not believe how good the brakes are. EXTREMELY strong--in a heartbeat !! Check your messages.0
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Richard, just wondering, have you checked your vacuum with a reliable boost guage?
I checked a fairly new 308 with only a few miles on it and was getting 17 lbs, but the guage is many years old. I assume that as that 308 breaks in, the vacuum will increase.
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No, Kerry, just stating what the attachment has on it at max. Think 16" would be good. Thanks, now I am curious.
Would need to be the vacuum when the brakes are applied. But I am glad stopping is not better than it is now. Not sure that the 18" above is a minimum; would be an unworkable system. That is why I attached the graph for 'typical' hydrovacs.0
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