timing 351w

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Jun 29, 2013 | 08:55 PM

yonu

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Mountain Pass

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timing 351w

OK I am sorry if this is a stupid question but I am kind of at a brick wall

I have a 70 something 351w in my boat the problem I have is this I am trying to set the timing however do to the water cooling system I am unable to bring the vacuum advance around And am kind of stuck as the timing is so retarded that runs hot at ideal

Jun 29, 2013 | 09:03 PM

JWC 3

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Hook your advance to manifold insted of ported vaccum . That will advance it . Then bump down your timing as needed . a thought ?

Jun 29, 2013 | 09:06 PM

yonu

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Mountain Pass

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dumb question what is the difference in manifold vacuum and ported and there would i get manifold from.

sorry i am spoiled by electronic engines

yonu

Jun 29, 2013 | 09:14 PM

JWC 3

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From: Tennessee

Manifold is engine vaccum . Ported is only supplied at throttle command through the carb . I would think you could find a vac port somewhere on the carb or intake that is full engine vaccum . Of corse vac varries with engine load . Wot = less vac ,part or closed throttle = more vac .

Jun 29, 2013 | 09:22 PM

yonu

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Mountain Pass

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ok i will give that a look at tomorrow if i move the vacuum source should I expect any performance issues at WOT vs just above idle.

thanks,
yonu

Jun 29, 2013 | 09:30 PM

JWC 3

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There are threads about manifold vs ported . If set properly you can see better performance with manifold set up some say .

Jun 30, 2013 | 11:55 AM

baddad457

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From: south louisiana

Quote:

Originally Posted by JWC 3

Hook your advance to manifold insted of ported vaccum . That will advance it . Then bump down your timing as needed . a thought ?

If his timing is retarded now, then you're taking him in the wrong direction. He just needs to reset the initial timing. to accomplish what he's trying to do.

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Jun 30, 2013 | 01:17 PM

baddad457

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From: south louisiana

Then the simplest method is to jump all the wires around the cap one position each, by going clockwise with them all.

Jun 30, 2013 | 01:23 PM

#10

JWC 3

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From: Tennessee

That may work , or be more than he needs . A thought worth considering though .

Jul 1, 2013 | 11:43 AM

#11

baddad457

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From: south louisiana

Done it a few times myself, it'll work. You're moving the wire positions 45 degrees without touching the distributor itself, you then can pull back what's needed by adjusting the distributor.