Engine Vacuum question...
05-23-2004, 02:44 PM
#1
Burning Brakes
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Engine Vacuum question...
Hi all,
Just trying to tune the new motor. Break in is finished and I am still doing body work.... I put a vacuum gauge on the Holley 600 today to tune the mixture. I am showing... get this... 30 in Hg. at 850 rpm idle... warmed up. I am a little confused... is anyone else pull this much vacuum? Usually, hooking up a vacuum to the manifold port on the passenger side of the Holley will assist in tuning the air/fuel mixture. But I am already showing 30 in Hg..... any thoughts? :confused:
Just trying to tune the new motor. Break in is finished and I am still doing body work.... I put a vacuum gauge on the Holley 600 today to tune the mixture. I am showing... get this... 30 in Hg. at 850 rpm idle... warmed up. I am a little confused... is anyone else pull this much vacuum? Usually, hooking up a vacuum to the manifold port on the passenger side of the Holley will assist in tuning the air/fuel mixture. But I am already showing 30 in Hg..... any thoughts? :confused:
05-23-2004, 04:19 PM
#3
Race Director
Re: Engine Vacuum question... (Mr.Gearhead)
faulty gauge.
does it zero off?
i've had to pull off the needle and reset it :rolleyes: then they work OK
does it zero off?
i've had to pull off the needle and reset it :rolleyes: then they work OK
05-23-2004, 11:47 PM
#7
Burning Brakes
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Re: Engine Vacuum question... (Matt Gruber)
Yep.. it's the gauge. Just went out to the garage and what do you know....? The gauge reads 21 in Hg. just sitting there. I never even noticed... just hooked it up. Maybe it broke during my tuning? Oh well, going to buy another one tomorrow. Sometimes I think I make my small problems too hard to solve... THANKS GUYS!!!!!!! :lol: