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#1
03-26-2006, 09:35 PM
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68 L78 Holley vacuum advance question
My assembly manual for 68 Camaro shows vacuum port just rear of the passenger side carb base bolt on the DZ Holley. There is no vacuum at this port at idle, it opens to a hole above the throttle plates, which are closed at idle. Is this correct, no vacuum is reqd at idle/ Also, my only book showning initial timing advance(68 Chevrolet chassis service manual) shows 4 degrees before TDC is this enough advance? Help will be appreciated. Thanks
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#2
03-27-2006, 12:55 AM
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Re: 68 L78 Holley vacuum advance question
The distributor was set up with emissions in mind. Take it to a shop with a distributor maching and have it set up with a performance curve. Lots of easy hidden horsepower to be had.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now. 
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#3
03-27-2006, 01:05 AM
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Re: 68 L78 Holley vacuum advance question
Thanks much, I couldn't understand why so little advance, any distributor shop you can reccomend, also to redetail distributor at the same time?
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#4
03-27-2006, 02:56 AM
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Re: 68 L78 Holley vacuum advance question
I had a distributor done by MacNeish. Very nice work. www.z28camaro.com
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Tony 55 Nomad Gasser 70 SS 427 Nova 34 Ford Sedan..Hemi powered Michigan/ Florida
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#6
03-27-2006, 03:27 AM
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Re: 68 L78 Holley vacuum advance question
If you click on the link I posted, it takes you to his web site. Tell him Tony in Michigan said hello.
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Tony 55 Nomad Gasser 70 SS 427 Nova 34 Ford Sedan..Hemi powered Michigan/ Florida
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