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which 2100 carb?

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huntnfish08
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which 2100 carb?

Post #1 by huntnfish08 » Sun Feb 22, 2015 10:31 am

I've got a 4.9 in my truck and want to put a 2 bbl carb on. I've got an old Clifford intake to match it to. I can cut a plate at work to mount it with a gasket for a template but I'm not sure which carb to get.
I saw many motorcraft 2100s at the salvage yard off different engines. I'm thinking one from a 302 would be most appropriate but would like some input from others who may have more experience.
Thanks, Adam.
Adam White

1978 F150, 300cid, NP435/205, 4x4
Clifford intake, 2150 1.08" 2bbl, comp 1.76:1 rockers, EFI exhaust manifolds.

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THE FRENCHTOWN FLYER
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Re: which 2100 carb?

Post #2 by THE FRENCHTOWN FLYER » Sun Feb 22, 2015 1:16 pm

A 2100 or a 2150 from a 289 / 302 will work well. The 2150 has moveable part throttle metering rods that may give you a skosch more fuel economy. The size of the throttle is cast on the side behind the throttle linkage. Look for "1.08" - the most common size.
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huntnfish08
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Location: Wisconsin

Re: which 2100 carb?

Post #3 by huntnfish08 » Sun Feb 22, 2015 2:57 pm

My local yard has plenty from 302s. Does the year matter? 1.08" is the venturi size most prefer? Should this be a bolt on and go? I realize I'll need to fab up a throttle linkage I just don't want to re-jet and spent a lot of tuning time.
Adam White

1978 F150, 300cid, NP435/205, 4x4
Clifford intake, 2150 1.08" 2bbl, comp 1.76:1 rockers, EFI exhaust manifolds.

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Harte3
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Re: which 2100 carb?

Post #4 by Harte3 » Sun Feb 22, 2015 5:16 pm

There is no way of knowing whether rejetting may be necessary until you run the carb for a while.
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.

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THE FRENCHTOWN FLYER
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Re: which 2100 carb?

Post #5 by THE FRENCHTOWN FLYER » Sun Feb 22, 2015 7:11 pm

huntnfish08 wrote:My local yard has plenty from 302s. Does the year matter? 1.08" is the venturi size most prefer? Should this be a bolt on and go? I realize I'll need to fab up a throttle linkage I just don't want to re-jet and spent a lot of tuning time.


Any year can be made to work. If you are using EGR I would get a carb tuned for EGR.

As far as jetting, you may not have to change anything. Maybe lean out the idle mixture screws a little.

I recently put two 1961 vintage 2100s (1.02s) on my roadster pickup truck. They required zero modifications except to adjust the idle speed screws. Ran high 11s at the strip.


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Econo4spd
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Re: which 2100 carb?

Post #6 by Econo4spd » Mon Feb 23, 2015 12:43 am

FTF

I love how it seems every few months you post pics of yet another induction setup for one of your dragsters.
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9 inch 3.00:1
No longer stock '85 E150 stripper cargo in Shelby White. Offy (divided plenum), 2150 2V, EFI exh Mani, pocket port, DS-II

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THE FRENCHTOWN FLYER
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Re: which 2100 carb?

Post #7 by THE FRENCHTOWN FLYER » Mon Feb 23, 2015 12:39 pm

Econo4spd wrote:FTF

I love how it seems every few months you post pics of yet another induction setup for one of your dragsters.


I'm going to keep at it until I finally get it right.
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1986F150six
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Re: which 2100 carb?

Post #8 by 1986F150six » Mon Feb 23, 2015 2:09 pm

Recently, a wise and respected forum member said something like, "don't be afraid to fail", in reference to experimentation! :D

Harte3
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Re: which 2100 carb?

Post #9 by Harte3 » Mon Feb 23, 2015 2:19 pm

"I have not failed. I've just found 10000 ways that won't work." - Thomas A. Edison
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.

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johns3524
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Re: which 2100 carb?

Post #10 by johns3524 » Mon Feb 23, 2015 5:27 pm

I would say "the one with a tight moving throttle shaft, that has good fuel inlet threads, secondarily..one with non-corroded threads,
86' Bronco, 300-6, .030 over, Crane cam, Cloyes gears, Clifford Intake, Autolite 2100 C3 manual choke, EFI head & manifolds>walker2n1>shorty Magniflow>, Duraspark II, TFI coil, Napa blue box, NP435, NP208F, 3.50's-9"& Dana44ttb, factory a/c

motzingg
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Re: which 2100 carb?

Post #11 by motzingg » Thu Feb 26, 2015 4:28 pm

^ ha, yeah, that!

Mine is a 1.21, a little bit on the rich side but i'm real happy with the performance and driveability

i think any size venturii is going to be pretty good, i figured mine would take a bunch of re-tuning but it pretty much just works no questions asked.

the condition and manual/auto choke is going to be the most important. later ones got some different dashpot subsystems that are kinda wacky, don't know anything about all that, suffice to say the earlier ones are simpler.

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johns3524
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Re: which 2100 carb?

Post #12 by johns3524 » Thu Feb 26, 2015 4:53 pm

manual choke+++ uh-huh..
86' Bronco, 300-6, .030 over, Crane cam, Cloyes gears, Clifford Intake, Autolite 2100 C3 manual choke, EFI head & manifolds>walker2n1>shorty Magniflow>, Duraspark II, TFI coil, Napa blue box, NP435, NP208F, 3.50's-9"& Dana44ttb, factory a/c

huntnfish08
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Re: which 2100 carb?

Post #13 by huntnfish08 » Fri Feb 27, 2015 10:02 pm

So look for a non-egr, manual choke carb with clean threads. Any idea what years this would limit my search to. Say prior to x year on these models?
Thanks
Adam White

1978 F150, 300cid, NP435/205, 4x4
Clifford intake, 2150 1.08" 2bbl, comp 1.76:1 rockers, EFI exhaust manifolds.

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