Low Vacuum
#1
Low Vacuum
Hi Folks,
Have 66 mustang coupe with 69 302 rebuilt with 4 barrel Holley. When timing is correct, 8 degrees BTDC vacuum is low, 12, when I retard timing vacuum climbs to correct vacuum, above 15. Adjusting carb has no effect. Any ideas.
Thanks,
Ed G
Have 66 mustang coupe with 69 302 rebuilt with 4 barrel Holley. When timing is correct, 8 degrees BTDC vacuum is low, 12, when I retard timing vacuum climbs to correct vacuum, above 15. Adjusting carb has no effect. Any ideas.
Thanks,
Ed G
#3
I am under the impression that vac would only increase if RPM increased
I am also under the impression that if you were at 8* tdc and you retarded the timing RPM would decrease and so would vac.
So my gut reaction is: you are turning the distributor counter clock wise to advance the timing...is that accurate?
Let us know what you find!
-Gun
I am also under the impression that if you were at 8* tdc and you retarded the timing RPM would decrease and so would vac.
So my gut reaction is: you are turning the distributor counter clock wise to advance the timing...is that accurate?
Let us know what you find!
-Gun
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