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I have about 500 miles on my new rebuilt 355 SBC. It has 10:1 CR. Compression test shows 175 PSI in all cylinders and 1-2% leakdown on all cylinders. The cam is a HR Straub. .050 duration is 215/224, advertised is 284/296, Lift is .470/.490. Centerlines 108/116, LSA is 112, Zero overlap. I am getting a steady 14" vacuum at idle. I kind of expected more vacuum at idle. I don't have power vacuum assist brakes, so it really doesn't hurt a thing. I just expected it to be higher. Just wondering if I may have leak. I can detect no external leaks, so if anything is leaking it would have to be at the bottom of the intake gaskets.
What vacuum would you guys expect from this setup?
What vacuum would you guys expect from this setup?