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02-10-2014, 05:06 PM
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#1 |
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Registered User
Join Date: Dec 2013
Location: Hurley Missouri
Posts: 5
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High vacuum readings
My 84 k20 with a 350 is having outrageous vacuum readings. Its pulling about 65 at an idle at the intake. This is a lot more than the typical 17 to 22. What could be the culprit? Its got a edelbrock performer eps intake and a Holley 750 cfm carb too.
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02-10-2014, 05:21 PM
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#2 |
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Registered User
Join Date: Jun 2011
Location: Richmond,Va
Posts: 2,934
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Re: High vacuum readings
Are you sure you are reading it right? There is no such thing as vacuum over 30 hg. in.
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Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever! |
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02-10-2014, 06:57 PM
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#3 | |
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Registered User
Join Date: Jul 2011
Location: WV
Posts: 946
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Re: High vacuum readings
Quote:
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72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold  70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
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02-10-2014, 08:07 PM
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#4 |
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Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,373
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Re: High vacuum readings
You're not reading the metric Kilopascals (kPa) scale by mistake are you? 65 kPa = 19.2 inHg.
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02-10-2014, 09:22 PM
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#5 | |
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Old Heap Driver
Join Date: Mar 2008
Location: Newport News, Va
Posts: 2,643
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Re: High vacuum readings
Quote:
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_____________________________ Bryan '99 Silverado 1500, 4.3, 5-speed, reg cab, short bed '50 Chevy 2DR Hard Top, 350/350, M2 Front End, 3:08 gear, cruiser. '40 F**d Sedan, all Chevy power, Heidt's front end, TCI rear, nice driver. |
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