 How much vacuum @ what RPM???, Checking my new MPS |
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| TJB/914 |
 Aug 19 2003, 08:33 AM
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Mid-Engn.  Group: Members Posts: 4,336 Joined: 24-February 03 From: Plymouth & Petoskey, MI Member No.: 346 Region Association: Upper MidWest 
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Bought a new MPS and my 1974 2.0 liter (Modified) F.I. Spliced a vacuum gauge into the hose connecting the MPS and got the following readings.
500 RPM @ 5" Vacuum 1200 RPM @ 10" Vacuum 2000 RPM & above over 15" Vacuum. I adjusted everything and it runs great without the past idle problem being to low. My question to the experts what is the correct vacuum pressure supposed to be with a stock cam?? and at what RPM?? I have a modified cam & I believe my vacuum reading is a little low but it runs ok with my latest adjustments. Tom |
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Posts in this topic
Thomas J Bliznik How much vacuum @ what RPM??? Aug 19 2003, 08:33 AM
Bleyseng At idle you should have 15-17 inches of Vacuum wit... Aug 19 2003, 08:44 AM
KenH The vacuum needs to be measured with the engine un... Aug 19 2003, 09:15 AM  |
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