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1983 Scrambler "STUMP JUMPER". Frame off, 5.3 Conversion.

zr10054 said:
I hope to go to the painter tomorrow and pick up my roll bar, top and bulkhead and drop off the hood.
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It's another NO GO. Painter's could be politicians, they never do anything when they say they will and they still promise you the world and they want lots of money. But he's all I got and he is good.
 

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That is one of the sexiest engine compartments ever...
 
So I took Stump Jumper on it's longest test run yet, about 10 miles, and at 70 mph in OD I was running about 1250 RPMs and when I put the pedal down there was just not enough pep in her. So now I'm thinking new gears and probably 4:11 and maybe 33 inch tires. I need opinions.
 
You have the 2.73s right? I would definitely change the gears. I only went up/down to 3.31s and love the increase in get up and go. Of course with the t176 four speed I am reving at about 2500 at 65
 
zr10054 said:
So I took Stump Jumper on it's longest test run yet, about 10 miles, and at 70 mph in OD I was running about 1250 RPMs and when I put the pedal down there was just not enough pep in her. So now I'm thinking new gears and probably 4:11 and maybe 33 inch tires. I need opinions.
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No real life answers here, but plenty of guys that are or have been there already.
I do have an opinion though. Let me be the first to say:

Just
Empty
Every
Pocket

:rotfl:
 
FLCJ8 said:
No real life answers here, but plenty of guys that are or have been there already.
I do have an opinion though. Let me be the first to say:

Just
Empty
Every
Pocket

:rotfl:
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Already done that. Cha-Ching
 
FLCJ8 said:
No real life answers here, but plenty of guys that are or have been there already.
I do have an opinion though. Let me be the first to say:

Just
Empty
Every
Pocket

:rotfl:
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Seriously though Dennis.
Here's a link to compare your current set up to optional ones.
It may help confirm what gearing you have as well.

http://www.grimmjeeper.com/gears.html

Although real world opinions will help greatly.
 
Since you're running stock axles, why not find a set of 3.54's? They should be plentiful and inexpensive.


Wait...that's not in line with your build so far![emoji39]
 
FLCJ8 said:
Seriously though Dennis.
Here's a link to compare your current set up to optional ones.
It may help confirm what gearing you have as well.

http://www.grimmjeeper.com/gears.html

Although real world opinions will help greatly.
Click to expand...
Thanks for the link, it really helps out a lot. Got me leaning to 4:11. That should work with the 30 " or 33" tires.
Also I added a lot of features that aren't so obvious like the WipeBoy wiper up grade and the auto dimmer rearview mirror with Homelink remote for my garage doors. There is also a small black box on the upper corner of the windshield on the inside passenger side that is my radio antenna and a GPS antenna for the Speedhut speedometer.
 

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Let me know how you like the WipeBoy conversion. Does it include the linkage as well?
 
1983 Scrambler "STUMP JUMPER". Frame off, 5.3 Conversion.

That Wiper conversion is on my list too.

4.11 gears are just about perfect with 31" tires and an overdrive. 3.73 gears will give a bit better fuel economy.

Go with 4.11 if there's any chance you might get 33's in the future.

Changing gears and tire sizes might require a computer reprogram for best power and economy.
 
The wiper conversion seems to work fine and includes new linkage for the wiper motor. That was pretty easy.
I think I'll probably go with the 4:11 gears since I don't really care about the MPG. Although I did drive it with a Scangauge again today and at 50MPH it showed 23MPG, at 60 it showed 18 mpg and at 70 it showed 13 mpg and didn't have any pep left. Pretty obvious the 2:73 gears aren't going to work. ..........Re tune the Computer too.
I am in search of a windshield washer nozzle if anyone has one let me know please.
 
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Wait, so the doubters were right?? Just kidding!!! Just driving the 2.73's around town doesn't really bother me. It's the highway that really sucks. The one time my wife did the 25 max on a hill on the highway she was not amused and she loves the scrambler.


 
zr10054 said:
At 70 it was running only about 1250 rpms.
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Sorry I wasn't clear. I had seen your post earlier about 1250 @ 70.
Just curious at the other speeds, depending on what gear the trans was in at the time, what the rpms were.
 
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