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High altitiude timing and "Nutter Bypass"
| 1984-2001 Jeep XJ Cherokee Lift Kits 3-4.5" with Full | Introducing MONSTALINER™ UV Permanent DIY Roll On Bed Line | Spartan Lockers FREE SHIPPING Excellent Prices |
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#1 | |
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Registered User
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High altitiude timing and "Nutter Bypass"
I just performed the "Nutter Bypass" on my jeep and need to set the timing. While I was reading to see what the stock timing should be there were two readings. One for regular and then one for high altitude. I live in Las Vegas at around 2500 - 3000 Feet. What is considered high altitude, and does it matter for the Nutter?
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#2 |
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Registered User
Join Date: Aug 2007
Location: Albuquerque, New Mexico
Posts: 892
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I live at 7200 and set mine at 12 bdc. At 2500 I wouldnt touch it. I see you have a weber 32/36. You may want to buy an altitude jet kit and bump your air jet up 3 sizes or your primary idle down 1 size. The webers run a tad rich anyway so the difference between sea level and 2500 and the tendency for webers to run rich might give you a little better performance.
You can test this by your lean best idle mixture. If the screw is out more than 2 turns you may want to consider it.
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Weber 32/36 DGEV, 4" Suspension Lift , 1 " body lift 8000 lb Winch, ViAir Onboard Air TeamRush ignition upgrade with MSD 6a CDI Dual Batteries KC Daylighters Cold Air Intake Lock-Right Lockers Yukon 1 piece axles Custom Bumper& Swing Out Tire Carrier Mile Marker Hubs Chevy Blower Upgrade 1500 lb airbag suspension Floor mounted gun rack (2 guns) |
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#3 |
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Registered User
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This Carb swap has been a real bugger. My idle mixture screw is out 3 turns and my idle screw 3 1/2 turns
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#4 |
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Registered User
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Try adjusting the timing advance a little at a time till it pings, then back it down. You may need to adjust it again later after it gets real warmed up.
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#5 | |
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Registered User
Join Date: Aug 2007
Location: Albuquerque, New Mexico
Posts: 892
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Quote:
Idle speed screw should be about 1.5 in +- 1/2 turn. From that point adjust your idle mixture. here is the link for the adjusting procedure. I would reccomend starting all over on adjustment. At that point you can decide if you need to re-jet CARBURETOR SET UP AND LEAN BEST IDLE ADJUSTMENT
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Weber 32/36 DGEV, 4" Suspension Lift , 1 " body lift 8000 lb Winch, ViAir Onboard Air TeamRush ignition upgrade with MSD 6a CDI Dual Batteries KC Daylighters Cold Air Intake Lock-Right Lockers Yukon 1 piece axles Custom Bumper& Swing Out Tire Carrier Mile Marker Hubs Chevy Blower Upgrade 1500 lb airbag suspension Floor mounted gun rack (2 guns) |
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