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post #1 of (permalink) Old 07-23-2002, 10:51 PM Thread Starter
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Holley at 7000 ft?

I picked up a new Truck Avenger for my CJ, and I'm wondering about the jetting here in Flagstaff. I live at 7000 ft, and frequently wheel higher than that. The carb seems to stumble a little, and has a lack of power at WOT. It has the same CFM rating as my Projection did, and the EFI ran fine.
Jetting? Other ideas?
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post #2 of (permalink) Old 07-24-2002, 05:26 AM
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Re: Holley at 7000 ft?

I'd say start with the timing and mixture, then change out to smaller jets if you're still having problems.
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post #3 of (permalink) Old 07-24-2002, 05:00 PM
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Re: Holley at 7000 ft?

When I had my big block Dart in Laramie Wyoming (6800 ft) it ran like crap! 400 inch MoPar with a mild Engle cam and a 750 vac secondary. I needed to lean out the jets about 7 sizes, put a much lower power valve in (can't recall vac#, in WI I ran a 10.5 PV with great results). After all of this it ran ~better~ but still had NO power. The car ran 12.90's in WI, it would only run hi 15's at Bandemere (5200 ft.). Good luck!
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post #4 of (permalink) Old 07-24-2002, 09:55 PM
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Re: Holley at 7000 ft?

A basic rule of thumb here in Colorado Springs @ 7,000ft. is add 4 degrees to your base timing. Then drop one main jet size, or lower your float lever 2/23 inch. Trim up your idle circuits, you should be fine.

Of course that is if you can even make any Holley work. I never had any long lasting luck with them. They seemed to be very short lived, and instable.
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