The 1947 - Present Chevrolet & GMC Truck Message Board Network

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- - 4.8L Vacuum (https://67-72chevytrucks.com/vboard/showthread.php?t=660519)

Mjminino

02-17-2015 07:01 AM

4.8L Vacuum

How much vacuum does a stock 4.8L generally make? The truck had absolutely no brakes when i bought it and I am looking to switch over to disk brakes. and I have no idea what size brake booster and either single or dual diaphragm to acquire. Thanks in advance!

tinsoldier

02-17-2015 11:05 AM

Re: 4.8L Vacuum

I am getting 24-28psi plus.

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