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Thinking of replacing my summit racing carb with a truck avenger. Who has done this on their daily driver and how was it? It's mainly a dd and tow rig.

Pretty sure Holley specifically says not to be used on a tow rig.

I had one back when they first came out. It was easy to tune. Get a spring kit and a few jets and spend an afternoon getting it set up right and it should serve you well.

You wouldn't be gaining anything other than off-road driveability on hills/sidehills and when bouncing around.
The Summit carb is a wanna-be Motorcraft/Holley hermaphrodite (M2008) and is a decent unit for what you are doing.

I ran a 670 Holley TA on the Honcho (AMC 360) prior to going with TBI.

I loved that thing for 'wheeling. It was virtually impossible to make it stumble or have problems. I feel it's a great carb and I highly recommend it. They are super easy to tune, parts are available and they are reliable.

But end the end, it's still a carb and will show it's @$$ on occasion, which is why I swapped to TBI and will NEVER run another carb

I like the low end torque that is says it offers. I'm not sure to go with the truck avenger or just the avenger. Some sites says it's meant for off road only, and some say it's great for off road, dd and towing?

I believe there are two 'avengers' Street Avenger and Truck Avenger. The main difference is the truck avenger has the spillover tube and different calibration and the street avenger does not have that extra tube. I think you can statically calibrate either for any application.

But if you are DD and towing, then yeah, TBI is like a million times better than any carb that has, is, or will be ever invented. But I digress on the TBI stuff as I realize most people simply aren't gonna do it.

Yeah for what you're doing it's a trophy carburetor. As far as performance on the street there's really no advantage. They are certainly worse on gas mileage. I have a 600 Holley now & it performs almost as well as the TA did. I had a TA on mine for a while. The cost of the carb & gas was not worth the coolness. I can do everything with the one I have now that I could do with the TA. Yeah you can buy it, buy then buy jets, springs & everything you need to calm it down when basically it's becoming a standard carburetor. Save the bucks. The 1800 series all tune just like the TA. With the air cleaner on you can't tell the difference. I've never had any issues with mine off road.

'A million times better' is a bit of an over reach when comparing carbs and TBI.

To get the best performance out of either it will take some time to learn how it works and make adjustments. For carbs that can include 'taking it apart', for TBI it might mean going as far as getting a chip burned.

TBI's can adjust for changes in altitude better. Carbs are not prone to electrical issues that can cause immediate failures.


Since both are 'wet manifold', that is the fuel and air mixed and then they pass through the manifold, you have to tune to the leanest cylinder. That is, you avoid going over lean. This is because the length and shape for each path is not uniform.

I went from TBI to a Holley Truck avenger and love it.

will e wrote:'

I went from TBI to a Holley Truck avenger and love it.

LOL is all I can say

Put a M2150 on there and be done.

Says the person running SEFI on both his Jeeps.

The Summit is a way better street carb. It's based on a Motorcraft 4100, which is one of the best 4bbl carbs ever made in my not so humble opinion.

I think I'll start with tweaking the Jets and springs in the summit. If I'm still not happy, I'll pick up a holley.

will e wrote:
I went from TBI to a Holley Truck avenger and love it.

What kind of MPG's were you getting with both?

My 2150 starts my GW as fast as any TBI out there. 1/2 pump to set the choke, and it fires before the key is turned all the way to 'start.'

As many people have said, the Motorcraft 2100's were the original off-road carburetor and do very well at strange angles so long as the float level and idle mixture are correct. Many regard it as the ultimate off-road 2bbl carburetor.

The Motorcraft 4100 is basically two 2100's shoved together. The old "shoebox 4100" was mildly revised by Holley into the 4010, then the tooling sold to Summit. The Summit carb has many similarities with the original 4100 and therefore the 2100, so I'd think it should do very well off-road.

Truck Avengers don't even have main air bleeds. Even the carburetor on my lawn mower has main air bleeds. Holley gave up some things to make it off-road worthy. On top of that, the Summit carb is highly tunable, with replaceable pump jets, pump cams, PVCR's, main and idle air bleeds, and you can even swap booster clusters to change your emulsion circuits.

Hope I don't get out wheeled by a lawnmower.

What will e was referring to was a Holley 2D analog projection system.
You can't compare them to a true GM throttle body system really.
I ran the same 2D setup and also tore it off in favor of a TA670, with the TA470 probably better suited for a mild/used 360 (will e is a 401 and I am a Caddy425).

It does not seem to matter if I tow with mine, empty/loaded/etc. I get between 9-10 mpg.
I got marginally better with the 2D setup when it ran well but not enough to justify keeping it.

I won't argue the merits, FI is clearly superior.
But you won't limp a dead one home with a sports bottle and vacuum hose like you can a carb.

FSJunkie wrote:As many people have said, the Motorcraft 2100's were the original off-road carburetor and do very well at strange angles so long as the float level and idle mixture are correct. Many regard it as the ultimate off-road 2bbl carburetor.

The Motorcraft 4100 is basically two 2100's shoved together. The old "shoebox 4100" was mildly revised by Holley into the 4010, then the tooling sold to Summit. The Summit carb has many similarities with the original 4100 and therefore the 2100, so I'd think it should do very well off-road.

Truck Avengers don't even have main air bleeds. Even the carburetor on my lawn mower has main air bleeds. Holley gave up some things to make it off-road worthy. On top of that, the Summit carb is highly tunable, with replaceable pump jets, pump cams, PVCR's, main and idle air bleeds, and you can even swap booster clusters to change your emulsion circuits.

Except the 4100 sucks off road. I've tried. There in a fuel passage between the bowls on the left side. On steep hills, fuel drains from one bowl to the other, flooding the engine out.

I personally like the TA. To me, they are easy to tune and easy to put a kit in. If I get out wheeled by a lawn mower, I just hope the blade has been removed.