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06-01-2006, 10:52 PM
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Bleedin' Gasoline
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Join Date: Oct 01, 2005
Location: San Fernando Valley
Posts: 1,952
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Good offroad 4-bl carbs
I'm looking for opinions. The MC 2100 is a great offroad carb. Is the AMC-Motorcraft 4300 just as good for off-angle operation? I'm talking about hill climbing, sand and typical desert operation - not the extremes of climbing boulders.
Another Ford carb that I've looked at is the 4100 Autolite 4-bl. According to Ponycarburators.com it is a terrific street performer with advantages over any Holley. Any knowlege about the offroad capabilities of the 4100? I thinking that they may have been used in V8 Broncos or other ford 4WD vehicles.
All these Ford carbs are known for long-term reliability and decent street performance and gas mileage. Plus they all look OEM enough to get by smog inspection sillyness. The only question is how well the offroad issues are handled.
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\'84 J10 Pioneer -- Edelbrock headers, Intake. MSD 8778 Ignition. MC 4-bl carb. 1970 "319" 51-CC heads. Comp cam. 401/727 B&M truck-shifter (floor), 3.73:1 gears. 31\"x12.5\"x15 ProComp A/T tires on M/T Classic II 15x10 wheels. Rear swaybar. Bucket seat conversion & redone interior. Interior roll bar and 4-point harnesses.
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06-01-2006, 11:28 PM
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Master Mechanic
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Join Date: Aug 06, 2002
Location: close enuff to Denver, but far enuff from the people
Posts: 942
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Quadra-jet
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06-02-2006, 07:37 AM
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Master Mechanic
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Join Date: Feb 04, 2005
Location: Ogden Ut
Posts: 1,327
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if the 4300 is the 4 barrel, i aint good with numbers, it sucks off-road. Quara-toilet is very good, but can be kinda of a bee-otch to tune. i have the Edelbrock 1406 with the off-road needles, its pretty ok, still will cut out a little too easily in my opinion.
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Alex
76 Cherokee Chief
350/th400/d20
d44/14b
4" lift, 35 inch retreads
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06-02-2006, 08:20 AM
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King of Unfinished Projects
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Join Date: May 20, 2000
Location: Texas
Posts: 5,271
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Q-Jet, without a doubt but are tricky to get dialed in perfectly, but man, once you do! I have tried the Carter/Edelbrock carbs and they do not impress me at all. Holley's are the easiest to setup and you can buy an off road model or do the mods yourself if you want something very simple to dial in.
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In Process: 91 Wagoneer, D61/71 axles with 3.07 gearing, NV4500, NP205. Cummins 6BT.
Back burner project: Crew cab M715, Cummins/Allison/Rockwell Tcase/Dana 61/Dana 71.
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06-02-2006, 08:28 AM
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Join Date: Jun 21, 2005
Location: Huntington, Ma.
Posts: 8,040
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Another vote for q-jets. They are excellent carbs, once you get them set right. Which can be a bit of a pain.
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Thomas Russell
1971 Gladiator J2000 Custom-Cab Platform-Stake Dump
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06-02-2006, 09:30 AM
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Gear Head
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Join Date: Jul 25, 2002
Location: Washington
Posts: 664
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Quote:
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Originally Posted by KaiserMan
Another vote for q-jets. They are excellent carbs, once you get them set right. Which can be a bit of a pain.
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X2. Totally agree.
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Check out Sore4x4.com for a 4x4 site local to SW Washington/Oregon!
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06-02-2006, 10:13 AM
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Master Mechanic
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Join Date: Aug 29, 2004
Location: Grafton, OH
Posts: 902
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I've got a Quadrajet from a 350 that I picked up for my wag that you can have for $20 plus shipping. I decided that I'm going to go TBI instead. seems to be in good shape, but I'm sure it'll need a rebuild kit.
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Mike
78 WT Cherokee Chief Levis Edition, Rebuilt 401, DUI, Hickey Winch, Headman Headers, Dual 2 1/2" Exhaust.
88 Grand Wagoneer - SOA, D44HD & D60, 203-205 Doubler, Rear Disk Brakes, 36" H1 Double Beadlocks
02 VW Jetta TDI - DD
82 Mercedes 300TD
1953 Dodge B4-F 1 1/2 ton stake bed - Restoration Project
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06-02-2006, 10:17 AM
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Join Date: May 29, 2003
Location: Medford MA USA
Posts: 8,887
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The 4100 should be excellent off-road, since they are essentially 4V 2100s. I've no experience to back that up though. A large venturi (352, 390) 4100 should be easy to come by if you know of a yard with old cars. AFAIK it was only used with the FE big blocks and hipo 289 (small venturi), and the 289 carb is unobtainium. Pickups and Broncos all used 2Vs. Maybe a good option if you've already got a square pattern manifold.
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Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, KOs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Last edited by tgreese : 06-02-2006 at 10:20 AM.
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06-02-2006, 10:18 AM
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Join Date: Aug 17, 2002
Location: Bethel, NC
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if you plan on running anything besides an auto i suggest you use a hand throttle on the shifter. after last weekend i wouldn't trust a carb for anything.
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Need a Willys Pickup to restore
Places to Wheel in the Southeast
Quote:
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Originally Posted by Topgun2mo
I would think boxing would limit the amount the frame could flex over obstacles which I think IMO would be a bad thing. I would think you would want all the articulation possible.
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Quote:
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Originally Posted by johnny019
I'm not saying lockers don't improve the performance of your rig, just that they're overrated.
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06-02-2006, 02:25 PM
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Bleedin' Gasoline
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Join Date: Oct 01, 2005
Location: San Fernando Valley
Posts: 1,952
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Thanks all. The Q-jet isn't an option with my manifold.
The 4100 sounds good if it was a dual 2100. I got 200K from my old 2100 with only one rebuild around 130K. Since then I switched over to the 4300 and it works OK. I want to try either a 4100 or 4300 that's re-engineered by those Ponycarburator folks. The 4300 had lots of quirks that they fix. The 4100 would be more expensive but likely to add a few more HP. I'm hoping to improve carb performance all around but don't want to create problems going offroad.
__________________
\'84 J10 Pioneer -- Edelbrock headers, Intake. MSD 8778 Ignition. MC 4-bl carb. 1970 "319" 51-CC heads. Comp cam. 401/727 B&M truck-shifter (floor), 3.73:1 gears. 31\"x12.5\"x15 ProComp A/T tires on M/T Classic II 15x10 wheels. Rear swaybar. Bucket seat conversion & redone interior. Interior roll bar and 4-point harnesses.
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