Jeeps at higher elevations??? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-21-2005, 09:23 PM Thread Starter
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Jeeps at higher elevations???

Since I'm soon going to Colorado, is there anything I should be watching for when going from the lower elevations of AZ? I haven't driven a carbed vehicle for years at higher elevations. I will be in Denver but will want to go riding at much higher elevations. I know about the vapor lock/gas cap trick. Any other issues I need to be aware of? It's a pretty much stock 258 with the 1 bbl carb and stock ignition. It starts and runs great at normal elevations.
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post #2 of (permalink) Old 06-21-2005, 10:23 PM
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Re: Jeeps at higher elevations???

I'm working w/ some locals here on what they do for their rigs at the higher altitudes. Haven't found out too many specifics yet, but it sounds like their are high-altitude compensation kits for your carb. Basically sounds like it's a kit you install. From past experience some of my previous trucks, you can lower your floats once at higher locations and it seem to be fine. I'll keep ya posted on what I find.
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post #3 of (permalink) Old 06-22-2005, 11:18 AM
 
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Re: Jeeps at higher elevations???

There is a high-altitude jumper wire you will want to connect; it is usually found taped inside one of the wiring harnesses. You'll also want to change your timing. If you time according to the factory specs, anywhere between 16-12 BTDC will do.
Find a local jeep club or a friend or two before you venture alone in the mountains.......Enjoy Denver!
Joe (Wyoming)
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post #4 of (permalink) Old 06-22-2005, 01:22 PM
 
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Re: Jeeps at higher elevations???

Altitude Jumper Wire:


but, since you wrote it's one bbl than it not computer controlled and hence you don't have this jumper wire.
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post #5 of (permalink) Old 06-22-2005, 06:31 PM Thread Starter
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Re: Jeeps at higher elevations???

You're right, it's not computer controlled. I will hook up with someone before doing any wheeling. I was more concerned with making the trip, any way I go I have to hit some pretty high passes. I'm just trying to eliminate any potential problems along the way.
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post #6 of (permalink) Old 06-24-2005, 11:59 AM
 
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Re: Jeeps at higher elevations???

Since it's not computer controlled, you may have to do some tweaking to the carb. Not so much in Denver but at higher elevations. Your carb will run rich.
I thought I read somewhere that for carbed engines, you lose 5% engine power for every 1000 ft altitude.
It was a long time ago since I moved and drove my '86 from sea level to 8,000 ft...I had to let some air out of the tires once I moved, the decreased air pressure made the tires rock hard and the ride even rougher than usual:-)
Remember also that water boils at a lower temp at higher altitude. Keep your hoses and coolant in good shape....you wouldn't believe how many cars and RVs you see at the side of the road with steam coming from under the hood on a hot summer day trying to make it over Rocky Mountain Natl Park.
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