timing

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dsimpson@redcircle.net - 14 Aug 2006 01:28 GMT

Hello, i have a 1968 ford 302 and i'm having a little trouble with the
timing. First of all, the engine was recently rebuilt and i just got it
running. I cant get it to run well unless it is about 30 degrees
advance, where it pulls about 15 inches of vacum. According to the cam
manufacture it should be about 10-14 degrees advance. When i hvae it at
10-14 degreese, it starts a lot harder and idles very roughly and will
stall if i dont give it gas frequently. It only pulls about 5 inches of
vacume. The cam is pretty mild, its a comp cams high energy with .456
inches of lift and 268 degrees of advertised duration. what could the
problem be? any ideas?

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halatos@gmail.com - 14 Aug 2006 02:21 GMT

> Hello, i have a 1968 ford 302 and i'm having a little trouble with the
> timing. First of all, the engine was recently rebuilt and i just got it
> running. I cant get it to run well unless it is about 30 degrees
> advance, where it pulls about 15 inches of vacum. According to the cam

Sounds like the timing chain is off by a tooth.

Chris

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Ted Mittelstaedt - 14 Aug 2006 06:29 GMT

> > Hello, i have a 1968 ford 302 and i'm having a little trouble with the
> > timing. First of all, the engine was recently rebuilt and i just got it
> > running. I cant get it to run well unless it is about 30 degrees
> > advance, where it pulls about 15 inches of vacum. According to the cam
>
> Sounds like the timing chain is off by a tooth.

I hope when they rebuilt it they put in steel cam chain sprockets, the
OEM ones were nylon-coated aluminum and were total crap.

Ted

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lugnut - 14 Aug 2006 11:50 GMT

>Hello, i have a 1968 ford 302 and i'm having a little trouble with the
>timing. First of all, the engine was recently rebuilt and i just got it
[quoted text clipped - 6 lines]
>inches of lift and 268 degrees of advertised duration. what could the
>problem be? any ideas?

You should be setting the timing with the vacuum line(s)
disconnected and plugged. IIRC, yous may have a dual
diaphragm advancer which I would lose if it is not a
concours resto. If the timing is off that far with the
lines disconnected, I would suspect that the outer ring of
the damper has slipped, the damper is wrong for the engine
or you have the wrong pointer installed. Also, make sure
you are setting the timing from the #1 plug. On a Ford this
is the front passenger side. I suspect you know this but
some from the SBC camp do not. The cam you have is fairly
mild and usually gives a decent idle.

Lugnut

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2ofdem - 14 Aug 2006 15:44 GMT

> You should be setting the timing with the vacuum line(s)
> disconnected and plugged. IIRC, yous may have a dual
[quoted text clipped - 9 lines]
>
> Lugnut

Damper would be my guess also seen it happen a few times on 302s.

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