Having trouble setting timing - JeepForum.com

 
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post #1 of 8 Old 10-11-2013, 04:13 PM Thread Starter
Grims
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Having trouble setting timing

I installed a new DUI HEI distributor and went and got me a timing light. This is an adjustment..as in the past I've used a laptop..or even a smart phone to set timing haha.

I'm having the problems though. The jeep won't even idle at anything under 18 degrees of advanced timing. It doesn't ping or anything while driving around either. I also confirmed 0 on the balancer is indeed TDC, so I'm rather confused.

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post #2 of 8 Old 10-11-2013, 04:16 PM
CSP
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Do you have the vacuum advance disconnected from the distributor and the line plugged?

If not, you should.
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post #3 of 8 Old 10-11-2013, 04:29 PM Thread Starter
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Dammit. I realized that and then ran back inside to try and delete this thread before anyone noticed it. Ah well.

Anyway, I have it at 10 degrees with a decent idle, but it seems to run the best at around 14. My motor has forged pistons, and a comp cam of unknown spec. I also have a Motorcraft 2150 carburetor.
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post #4 of 8 Old 10-11-2013, 04:31 PM
Matt1981CJ7
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I think Grims may have just set a new record for most threads started in a week.

Adding to what CSP said, if your dizzy is connected to manifold vac, the engine will be getting additional timing from the vac advance at idle. That's a good thing, but it will skew your attempt to set the initial, if you don't disconnect and plug it.

Matt
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post #5 of 8 Old 10-11-2013, 04:40 PM
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Quote:
Originally Posted by Grims View Post
Dammit. I realized that and then ran back inside to try and delete this thread before anyone noticed it. Ah well.

Anyway, I have it at 10 degrees with a decent idle, but it seems to run the best at around 14. My motor has forged pistons, and a comp cam of unknown spec. I also have a Motorcraft 2150 carburetor.
The safest way to set your timing is to set it at a maximum total advance (centrifugal + initial) of around 35*, at around 3200 RPM, then let the initial land where it lands.

With an extreme cam, those numbers may be slightly different.

Matt
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post #6 of 8 Old 10-11-2013, 04:42 PM
1997happy
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You might check your vibration dampner mine was 5* retarded.
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post #7 of 8 Old 10-11-2013, 04:46 PM Thread Starter
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Quote:
Originally Posted by Matt1981CJ7 View Post
The safest way to set your timing is to set it at a maximum total advance (centrifugal + initial) of around 35*, at around 3200 RPM, then let the initial land where it lands.

With an extreme cam, those numbers may be slightly different.

Matt
Hmm I think my timing marks only go up to 25.
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post #8 of 8 Old 10-11-2013, 05:50 PM
Matt1981CJ7
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Quote:
Originally Posted by Grims View Post
Hmm I think my timing marks only go up to 25.
Then measure the distance between 0* and 10* on your balancer, then place a mark at that distance away from the 25* mark.

Or, measure the circumference of your balancer, divide it by 10, then place a mark at that distance away from 0. That mark will be at 36* (360*/10 = 36*)

Matt
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