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Unread 11-08-2013, 10:55 AM   #16
swatson454
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Wasn't trying to be anecdotal. Just pointing out that initial timing is pretty important and those two stories popped right up in my little brain. It can make or break the set up of a Weber 32/36.

Back to the OP, it will depend on your altitude, your desired in-gear idle rpm, engine condition and probably a host of other things. I usually recommend starting at 8* and just drive test the thing over the course of a week or so while going up in 2* increments. It'll probably behave better to a point, then it won't really seem to make a difference and, once you get to that point, a further increase in base timing will start to sound like an engine full of steel marbles. Make sure you don't go there!

Like I mentioned, on an old stocker, especially one with ping-prone "smogger" heads from the '80s, you won't want more than 12*.


Shawn

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Unread 11-08-2013, 10:58 AM   #17
Grumpy_one
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Not to hijack this thread, but when I decide to upgrade my 76 to the CDI module and 79 dizzy, how would I go about finding absolute static/initial timing?
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Unread 11-08-2013, 11:00 AM   #18
ASteve
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Before you set timing make sure you perform Shawn's Finding TDC:

http://www.jeepforum.com/forum/f8/fi...r-tdc-1290121/

Sorry if this has already been covered but...

SC
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Unread 11-08-2013, 11:09 AM   #19
Matt1981CJ7
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Quote:
Originally Posted by Grumpy_one View Post
Not to hijack this thread, but when I decide to upgrade my 76 to the CDI module and 79 dizzy, how would I go about finding absolute static/initial timing?
Asked and answered in the first 2 posts.

Matt
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Unread 11-08-2013, 11:10 AM   #20
2Xtreme
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Quote:
Originally Posted by ASteve View Post
Before you set timing make sure you perform Shawn's Finding TDC:

http://www.jeepforum.com/forum/f8/fi...r-tdc-1290121/

Sorry if this has already been covered but...

SC
Got it.

Took care of this step before putting the radiator back on so I had plenty of access and CLEARLY marked TDC on the balancer.
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Unread 11-08-2013, 11:17 AM   #21
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Originally Posted by Matt1981CJ7 View Post
IMO, it would run even more "flawlessly" if you hook the vac advance up to manifold. Matt
'Flawlessly-er'...??
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Unread 11-08-2013, 11:18 AM   #22
Grumpy_one
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Quote:
Originally Posted by Matt1981CJ7 View Post
Asked and answered in the first 2 posts.

Matt
Read it, got it, read some more, lost it, read it again got it again. Thanks.
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Unread 11-08-2013, 11:24 AM   #23
Matt1981CJ7
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Quote:
Originally Posted by Grumpy_one View Post
Read it, got it, read some more, lost it, read it again got it again. Thanks.
Yeah, it's called "information overload".

If you ask for the time, some folks will tell you how to build a clock.

"Brevity is the soul to wit".

Matt
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Unread 11-08-2013, 11:52 AM   #24
JayCO
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Quote:
Originally Posted by Matt1981CJ7 View Post
2X,

DO NOT set initial timing to the highest vacuum reading. It's likely to result in far too much advance. Use the vacuum gauge for the mixture screws on the carb. Use a timing light for timing.

Here's what I recommend. The total timing (initial and centrifugal) at the upper RPM ranges is what I've found to be the most critical for performance. IMO, you should strive for 30-35 degrees total at around 3000 RPM. Once you achieve that, then let the initial land where it lands. My 258 ended up around 11 BTDC initial.

Then hook your vac advance up to manifold vac, set your idle around 700 RPM and dial in the mixture, and enjoy.

Matt
Matt,

If you're ever willing, I'd love your help with this. Nothing better than a lesson from a knowledgeable jeeper. Just let me know, and I'll head out your way. With beer!
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Unread 11-08-2013, 12:24 PM   #25
2Xtreme
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Quote:
Originally Posted by Matt1981CJ7 View Post
"Brevity is the soul to wit".
Quote:
Originally Posted by JeepHammer View Post
Not trying to be 'Witty'... Trying to give useful, detailed information.
I wasn't aware this was a 'Comedy' forum. ...
It's a quote from Shakespeare....
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Unread 11-08-2013, 12:39 PM   #26
JeepHammer
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Got the message, loud and clear... un-polluting your thread...
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Unread 11-08-2013, 12:42 PM   #27
roscopcoltrane
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Solid thread right here. Thanks fellas.
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Unread 11-08-2013, 03:56 PM   #28
2Xtreme
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Originally Posted by JeepHammer View Post
Got the message, loud and clear... un-polluting your thread...
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Unread 11-08-2013, 04:06 PM   #29
roscopcoltrane
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Damn JeepHammer. I was looking forward to really tearing into what you had posted tonight in the garage. Back to the old search function...
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Unread 11-08-2013, 04:36 PM   #30
lucdog
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Quote:
Originally Posted by 2Xtreme

Really 2X, roll eyes from the 258, Carburetor, ignition, TH400. What's this noise, expert.

WTF!

Bill
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