Re: 351W Vacuum and Timing Readings

Posted by Destroked 450 on July 26, 2018 at 06:54:58 from (173.242.142.14):

In Reply to: 351W Vacuum and Timing Readings posted by nrowles on July 25, 2018 at 07:24:23:

Need a little more info to work with.

It's a 351W with aftermarket cam of unknown size.

What carburetor is on it? Brand and size.

Automatic or manual?

If auto, stock convertor or aftermarket with higher stall?

If auto what is the vacuum at idle with the trans in drive?

Does it idle ok and is sluggish taking off or does it not want to idle well.

Is it gassy smelling at idle or about normal.

10-14 inches of vacuum is about normal for a small block with a mild performance cam, I've ran some pretty radical cams that only had 7 inches of vacuum or less at idle.

For a mild cam with a little lope or rumble you shouldn't need more than 12 degrees base timing at 800-1000 engine rpm.

With todays gas and modern cam grinds 34-36 degrees total is max.

I like to have total advance by 2700-3000 engine rpm.

Sound like some lighter springs are needed in the dist.

Also what dist are you running, stock or aftermarket?

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