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Re: [GMCnet] Whats your vacuum? [message #239122 is a reply to message #239109] Fri, 07 February 2014 17:07 Go to previous messageGo to previous message
chasingsummer is currently offline  chasingsummer   United States
Messages: 434
Registered: May 2011
Location: asheboro, nc
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Senior Member
I too see in the 15 to 20 range depending on how heavy my foot is. I know my speedo is off 5 to 8 mph(it readys low).
My I always assumed I had the standard final drive. and I dont have a tach, yet>
I installed vacuum gauge hoping it would assist me with better mpg. And I do believe it did that.


brian asheboro, nc 75 eleganza, 74 build 119k miles and counting, DOG HOUSE
 
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