Weber Carb On Dauntless 225 Question

Has anyone installed a Weber 32/36 carburetor on a Dauntless 225? If so what adapter(s) is needed? I have a new 32/26 carburetor setting in the box collecting dust and I am considering the feasibility of using it on my '70 CJ5.
-Martin

 

Isn't that a progressive 2 bbl?
I can't imagine how you'd make that work on a 225.

 

You might try listing it on Craigslist or the like. Toyota folks might be interested.

 

Yes, the 32/36 is a progressive 2bbl. I am looking for better fuel mileage as I drive my CJ5 almost daily and at <12-13 mpg it does get $$$. There is a Webber 32/36 kit for the Jeep 258 I6 that claims better performance and fuel economy. The 32/36 is a 300cfm carburetor which should be sufficient for the 225.
I'm simply asking if anyone has any experience with the 32/36 on the 225 and if so, what kind of adapter(s) was used. Thanks.
-Martin

 

If you have a 1bbl intake manifold, and can find/cobble an adapter, you may have luck with your 32/36. If you have a 2bbl intake manifold, your Weber will not work well. The nature of a V6 w/2bbl carb is designed for each throat to feed half the cylinders, not necessarily all on the same bank. If you tried your progressive 2bbl, only one throat (primary) would feed 3 cylinders, until the secondary kicks in to feed the other 3 cylinders. .
A progressive 2 bbl is designed for an open plenum manifold, typically on an inline 4 cylinder.
You would be best off finding an original Rochester 2 bbl or possibly a Holley 2 bbl.
I’m more than familiar with the Weber 32/36. I’ve had one on a BMW 2002 for decades.
-Donny

 

I have a 1 barrel intake for a 225 that I will give you if you come get it, or will ship it if you want to pay for that.

 

The best bet would be to convert to an open plenum 4 barrel manifold and adapt to that. The stock manifolds will not play well with the progressive 2 barrel as Donny has stated. It’s an unorthodox carburetor to use on a 225 but I see some possibilities. Unfortunately you are in pretty much uncharted waters here so information is probably minimal.

 

In stock form and running 50-55MPH, my CJ was hitting 18-20MPG's on the freeway. Being in the 12-13 zone tells me you have issues. Some may be:
Poor driving habits (excessive idle times, heavy foot at stops, excessive speed, etc...)
Excessive tire size.
Wrong gearing.
Poor tune up maintenance (retarded timing, dirty points, crusty air filter, etc....)
Excessive city driving.
Impractical engine mods (wrong intake, wrong carb, wrong cam, etc....)
Worn motor (low compression, worn cam lobes etc....)

Can you give us some light on:
What you have
What mods you have
What driving conditions you are experiencing

Perhaps we can give you some observations on how to up your mileage.

 

Altitude and Jet size would be good information too.

 

12 is the number I've had with mine all these years
yea I might have a heavy right foot . but I also drive a 88 ford ranger with little V6 FI and only gets 14
now my brother is a VW nut and uses two of them on his VW's

 

Yeah, I've never gotten much better than about 14 out of my -5. With the 2G or the 4Bbl. I don't really expect to see much more either.

 

So, I purchased my 71 in 1984 and promptly drove from Oregon to Ft Campbell Ky. I ran a consistent 50MPH (doable since 55MPH was the law) and garnered 18 through the west and 20 out in the plains. Thank goodness since all I had was the 10 gallon saddle tank.
I have since done a number of modifications and those numbers have dropped.

 

Thanks Donny, your response is the information I'm looking for, I did not know the 225 intake was split to feed each bank separately. That does open a can of worms that I didn't expect.

Thank you Oldpappy, I think you may have the answer to my issue. I will get back to you; my wife is thinking of us taking a vacation trip in the early spring that should pass close to you.

Jeepdaddy: I have a 1970 Dauntless with the T14/D18, 4:88 axles and I added a Saturn overdrive. Running 225/75r15 LT tires with street treads. Except for an aftermarket HEI distributor, the engine is stock with the Rochester 2g carb, oil bath filter, and single exhaust. Other than the distributor I have no idea what if anything the previous owner did to the engine. The engine feels strong with no smoke on startup or when running under a load, can't say about oil usage due to rear main seal and oil pan leaks but spark plugs don't appear to show any, so I haven't done a compression test.
I have done a tune-up with plugs, 8mm plug wires, timing. The carb seems to run a little rich at idle and I haven't quite got it leaned out. I've only dealt with multiple side draught carbs the past 40+ years so I'm still getting reacquainted with the down draught. I drive with the o/d engaged and most is done at 35 to 45 mph but on occasion I drive 55-60 on open highway and less often on the interstate at 65. I respect the fact that this is a 50+ year old jeep not built for hot rodding and I don't drive with a heavy right foot. I'm in Florida so no altitude issues and my off roading consist of sand/clay roads and woods trails. I appreciate the fact that the 4:88 gearing doesn't lend itself to high mpg's at higher speeds but I would like to squeeze a little more mpg's out at the slower end where I do most of my driving. The last vehicle I had that got this kind of milage was a '66 Mustang back in 71-74, but it was a beast that would pull a front tire off the ground in a drag race, not that I did any of that stuff
-Martin

 

It's never gonna be a Prius ( these things are as aerodynamic as a safe falling out of an open window) but I agree with the others that your Jeep ought to get in the high teens MPG wise.

 

First of all, thanks for the detailed response.

A couple of things to check:
The wind resistance on CJ's is horrible. Slow down a tad on the open road. I've found 50 to be the max both for mileage as well as stock steering/brakes. Doing that cross country forced me to slow down and "smell the roses". A fun way to check this it to do a hop with the windshield down. You will be amazed how much more speed is retained when rolling to a stop sign.

I (briefly) owned a 70 with 4.88/OD in the mid 80's. If memory serves, gearing was still a tad lower than my 71 with stock 3.73's. Your RPM's may still be a bit high for cruising, especially with smaller tires.

Swap the oil bath with a later paper filter element. You used to be able to walk through the U pick yard and grab a stock filter housing off a GM car or truck and slap it on your CJ. If that is still possible in your area, I'd go for it. I'm not a fan of aftermarket chrome filter housings, but that may be the only recourse.

Check your mechanical and vac timing. The Dauntless will accept a advanced timing and run better for it. Given your HEI is aftermarket, it may be somewhat retarded, especially at cruise.

Insure the choke is completely off.

See if you can strip down your CJ. Spare tires, tool boxes, extra parts, and other mish mash that you deem necessary for a trip usually doesn't need to be hauled around for DD'ing. If you are like me, you can strip out that "extra passenger" doing this.

Tire pressure.

You seem pretty astute so many of these things are probably redundant.

 

Might be an answer, I don't know how good of an answer though. The 225 engine this manifold was on came installed in a 67 CJ5 but it wasn't a Dauntless Jeep, it was a standard CJ5 which had had an engine conversion using the 225 engine from a Buick car. I also have the original Rochester 1 barrel carburetor that was on it if you want it, but those things have a reputation as one of the worst carburetors ever made.

 

Honestly, I'm hard pressed to find a better 2bbl carb than the 2g series. Properly cleaned and tuned, they have a good flow rate, are stone reliable, and the power valve is mechanical.

I've always wondered why the MC series outstripped the 2G as an upgrade on the later I6's, as well as other applications such as air cooled VW's.

 

I just picked up a 32/36 for my Toyota. $200 used on ebay was the cheapest I could find. New are $400-500.

 

Have you heard of thejeepsterman? (www.thejeepsterman.com). They have a complete Weber conversion kit for the Dauntless 225. I don’t have any technical information to add. I have purchased parts from them and saw it on their website, so I thought I’d mention it, in case you wanted to contact them with questions or concerns. They seem to be knowledgeable people with engineering and manufacturing capacity.