Alpine Lizard Build Project - Page 102 - JeepForum.com

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post #1516 of 4634 Old 08-19-2013, 08:49 PM Thread Starter
Dadamsnv
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1977 CJ5 
 
Join Date: May 2012
Location: Reno
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I checked my timing curve in preparation of purchasing a decent HEI unit. A while back, I tuned my distributor and it looked like this.

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When I checked today, it was...

12* @ 700 RPM
28* @ 1400 RPM
28* @ 2000 RPM

YIKES!!!!

My only guess was the springs fatigued, so I tore it apart and replaced my light and medium spring with two new medium springs. Then I tried again...

12* @ 700 RPM
15* @ 1200 RPM
23* @ 1400 RPM
28* @ 2000 RPM
28* @ 2500 RPM

Not a whole lot better, and what's with the jump between 12 & 14*??? Turns out the counterweights had worn on each other at 1400 RPM (where I typically wheel at and spend a lot of time at). It wore such that the advance falls into the 29* range into the pocket it wore and stays there. If it were loose springs, it wouldn't have stayed the same between 1400 and 2000 RPM since the max is mid 30's. that's my hypothesis anyway.

I hope it didn't harm my jeep too much. U haven't seen a drop in oil pressure or heard any audible pinging, so here's to hope. I will purchase a new dizzy before I run her again.


Cheers!
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post #1517 of 4634 Old 08-19-2013, 09:02 PM
lucdog
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1980 CJ5 
 
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Good info Daniel, I imagine anyone who takes there Jeep off road could have the same problem. I spend most time on trails between 700 and 1600 rpm.

B

1957 WILLYS pickup,
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7
1989 YJ the CJ to YJ.
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post #1518 of 4634 Old 08-19-2013, 10:51 PM Thread Starter
Dadamsnv
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Quote:
Originally Posted by lucdog
Good info Daniel, I imagine anyone who takes there Jeep off road could have the same problem. I spend most time on trails between 700 and 1600 rpm.

B
Ought to check your timing then!!!

Honestly I'm pretty sure a legit distributor wouldn't have an issue. Mine is some cheap knock off brand. Time for a real one. Probably go with a nice MSD one to match my wires

Cheers!
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post #1519 of 4634 Old 08-21-2013, 05:29 PM Thread Starter
Dadamsnv
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1977 CJ5 
 
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Location: Reno
Posts: 5,229
Here's pictures of my distributor weights.

Notice the dark spots. Those are heavily wore surfaces

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Cheers!
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post #1520 of 4634 Old 08-21-2013, 05:33 PM Thread Starter
Dadamsnv
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I went to summit and bought the most expensive HEI advance kit I could buy ($15 from accel). This will get me by until I can buy a decent distributor.

Cheers!
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post #1521 of 4634 Old 08-21-2013, 05:43 PM
243
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1978 FSJ Cherokee 
 
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Great job on the wiper motor restoration


1978 Cherokee, TBI 360/T400/QT...6.0/6L80/NP241C in the works...
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post #1522 of 4634 Old 08-22-2013, 05:31 PM Thread Starter
Dadamsnv
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Quote:
Originally Posted by 243
Great job on the wiper motor restoration
Thanks Dave!

Only thing I regret is painting the cord. I may see if I can't take the paint off of it some day.

Cheers!
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post #1523 of 4634 Old 08-22-2013, 05:32 PM Thread Starter
Dadamsnv
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The best part about living in the mountains is the incredible clear blue sky! Today is a little less clear.
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post #1524 of 4634 Old 08-22-2013, 06:09 PM
Skerr
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Thought that was a painting!

Kerrdog
Go Fish! <*////><

But the right word at the right time... "Hey, give me a little hug!" That's the difference between lightning and a harmless lightning bug!
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post #1525 of 4634 Old 08-22-2013, 07:02 PM Thread Starter
Dadamsnv
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Quote:
Originally Posted by Skerr
Thought that was a painting!
It's painting the insides of my lungs right now.

Cheers!
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post #1526 of 4634 Old 08-22-2013, 07:20 PM Thread Starter
Dadamsnv
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More pics
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Cheers!
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post #1527 of 4634 Old 08-22-2013, 08:01 PM Thread Starter
Dadamsnv
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Back to jeeps. So I've been through 2 new weight sets (accel and MSD). Both promise to be stock style, and I haven't been ale to get more than 27 total with 12 initial. Both weight sets have shot the advance up dramatically like the stock weights. Weird. Something is amiss.

Cheers!
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post #1528 of 4634 Old 08-23-2013, 10:33 PM Thread Starter
Dadamsnv
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Pics again

I've never been able to just stare at the sun like today. It's just a full orange ball in the sky. The keypad has ash in it. Which is why it's in the pics.
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post #1529 of 4634 Old 08-27-2013, 09:56 PM Thread Starter
Dadamsnv
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Well I was able to get some janky crappy curve for now until I can afford a decent distributor. The curve is way too safe and I'm sure the jeep will be sluggish, but at least it won't be grinding up the bottom end. It hits 27* at 2500 rpm from 12* at 1500 and doesn't go any higher. Le sigh.

Perhaps I'll begin seriously considering GM TBI swaps since I'm looking at a qjet too which means even mo money

Cheers!
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post #1530 of 4634 Old 08-27-2013, 11:05 PM
8pitcher
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Quote:
Originally Posted by Dadamsnv
Well I was able to get some janky crappy curve for now until I can afford a decent distributor. The curve is way too safe and I'm sure the jeep will be sluggish, but at least it won't be grinding up the bottom end. It hits 27* at 2500 rpm from 12* at 1500 and doesn't go any higher. Le sigh.

Perhaps I'll begin seriously considering GM TBI swaps since I'm looking at a qjet too which means even mo money
I gotta block all painted up and purdy

Built Not Bought #640

1976ish cj5 304 t18 d20 2.5" lift

some year YJ custom frame HP D60 14 bolt 4 linked front rear FI 350 700r4 NP231c

2009 JK 4 door 2.5" lift 35" tires custom bumpers mile marker 9500# winch
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