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Green Machine · 10-27-2006, 05:46 PM

I am wondering if the vacuum advance was hooked up to ported vacuum or a non working port before. If it is now hooked to a full manifold vacuum port, it may be giving more advance at low speeds than before.

10-27-2006, 05:46 PM	#7
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: ping ping ping edelbrock 1406 I am wondering if the vacuum advance was hooked up to ported vacuum or a non working port before. If it is now hooked to a full manifold vacuum port, it may be giving more advance at low speeds than before. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 Last edited by Green Machine; 10-27-2006 at 07:36 PM.