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Old 03-04-2004, 08:30 AM
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Timing on 350sbc

I am trying to set the timing in my engine. Would anyone have any suggestions as to what would be best to set it at? I have a 1979 Chevy Truck K10 with a 350sb. The motor is is pretty rough shape. Needs rings and some head work to say the least, I have 150,000mi on this motor. I do have another motor that I am rebuilding; untill then, I would like to get this motor running somewhat decent. I'm just about there; I just have a bit of tuning left to do on my carb, and to play with the timing. I just use it for around town trips and what not.

The sticker on the front of the truck calls for 8deg BTC at 500rpm. With this engine in such rough shape, and with the carb I am using, a Holley double pumper 4bbl 650cfm. I am trying to find out if I should retard the timing, or advance it. I am also using an advance curve kit on my distrubutor with the heavy springs, would the middle ones, or the light ones be better off?

Sorry for the wordiness, hope I didn't leave anything out that would be helpful to you. Thanks.

******************************
1979 Chevy Pickup K10 4x4
Stock 350ci w/ exception of
Holley double pumper 4bbl 650cfm
224,000mi on Truck w/ about
150,000mi on Engine

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Old 03-04-2004, 08:40 AM
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I'm using a Mr Gasket advance curve kit, and I used the mediem
springs. but the other day I was towing my frends Astro van and
I had some pinging, I think? so somewere I've got too much advance. my damper has shifted so I can't time it.
but I would set it at 10 deg initial and 32 deg total.
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Old 03-04-2004, 08:43 AM
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what is the difference between initial and total advance? my timing tab only goes to about 12 deg.
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Old 03-04-2004, 08:59 AM
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Initial advance is at idle, total advance is when you floor it, and the the carb sends vacuum to the vacuum advance on the dist.
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Old 03-04-2004, 09:16 AM
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how would I go about setting my vacuum advance, and checking it? Do u know of any good sites that would help with this. Thanks for your help. Steve
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Old 03-04-2004, 09:50 PM
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http://hotrodders.com/showthread.php?s=&threadid=34962

this thread helped me.
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Old 03-04-2004, 10:04 PM
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Quote:
Originally posted by jrm123180
how would I go about setting my vacuum advance, and checking it? Do u know of any good sites that would help with this. Thanks for your help. Steve

Do you have a timing light? and you know were the timing tab is by the damper, right?

Oh and you will need some timing tape that sticks to the damper
to set total timing.
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Old 03-05-2004, 09:24 AM
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I do have a timing light, and I do know where the timing tab is.
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