The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Seems like I have to keep advancing my timing

CSHADES · 08-09-2016, 10:11 AM

So now you have bumped the timing up again? Something is going on it should have more than 15 inches of vacuum and you shouldn't have to keep advancing the timing to get to run right. Ported vacuum to the advance is not emissions nonsense, you want more advance as the rpms increase that is why you go with ported vacuum. Why would you want most of your advance in at idle? If that was the case you wouldn't even need a vacuum advance.

08-09-2016, 10:11 AM	#15
CSHADES Registered User Join Date: Nov 2015 Location: portage wi Posts: 509	Re: Seems like I have to keep advancing my timing So now you have bumped the timing up again? Something is going on it should have more than 15 inches of vacuum and you shouldn't have to keep advancing the timing to get to run right. Ported vacuum to the advance is not emissions nonsense, you want more advance as the rpms increase that is why you go with ported vacuum. Why would you want most of your advance in at idle? If that was the case you wouldn't even need a vacuum advance.