I know a few may laugh, others scorn, and few yell an scream, but i am going to ask a question that seems to condradict itself.

The Collective Wisdom of the Forum says that to use a 2 BBL with a 1 BBL intake is more than just bad manners. It seems to be a mistake that defeats the purpose of the increase from 1 to 2 barrels.

On this and other post I have seen many people use a Weber DGV carb with only an adapter.

Is the Weber in a different catagory because it is usually used on smaller engines?

Will it work effectively with an adapter?

Will it work better on a 2 bbl manifold?

Does it matter if all I am looking for is economy and removing the off idle stumble?

I've read the posts and I've done the research, and I've concluded that adapters ar bad, but I am confused about the Weber application. If I am confused, then others must be also.

I am just looking for a clear answer with sound reasoning. The other Slant forum seems to embrace the Weber with the adaptor, but they are not sure why, or can't explain so that I can understand it.

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1967 D100 /225

Some of us catch on slow, and some of us don't.

Well, I'm going to attempt to make an educated guess, but that's all it is and I'll probably hear from Dan about it. LOL. It has nothing to do with the brand of the carburetor or the number of barrels. The stock manifold has one small hole in it to allow the air/fuel mixture to flow in. It doesn't matter how large the carburetor is or how many barrels it has, it will only flow as much air as that single hole will allow to pass. I don't see where a Weber would be any different. An adapter is nothing more than a funnel that directs air through a large carburetor into the smaller opening of the manifold, rendering the higher flow capacity of the carburetor ineffective. I suspect that it will also cause turbulence and/or reduced velocity in the throat(s) of the carburetor which will further inhibit its ability to function at optimum efficiency.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

Yeah, I know they said something about the adapter plate making it more lean, I think. but yet i wonder. Proline uses webers with adapter. In fact, I think that someone said that they needed to use an adapter to put the Weber onto the Super Six intake. I'm just wondering, because the Weber seems to be a smaller carb than American type two barrels.

I'd read another another post about carbs and Dan said it depends on the application.

I have 67 D100 stock. I am looking for a daily driver that gets great economy and dependability. I won't be using it loaded very much, so that is not a concern. I can't remember the last time I drove WOT. If anything, I never go past half throttle, and seldom drive, in any gear, above 3000 RPM. for the most part I drive like a little old man. I used to drive over the road, so if you want me to drive fast, then you have to pay me. I am retired, and I drive like I am not in a hurry with nothing important to do.

the original owner had the same idea as me. He changed out the rear axle ratio. It is so tall that I need to start off if first gear al the time.

In fourth gear with 29 inch tires (235/75 15) the engine spins:

2100 RPM = 50 MPH
2500 RPM = 60 MPH

But I think that I am going faster than indicated. I haven't checked it yet.

On the freeway, here in Vegas, when I indicate 60, I am passing almost everybody. i might be travelling 75 or 80, but it doesn't seem that fast. And the truck is suprisingly comfortable and relatively quiet. but it seems unusual that I can keep up with traffic at 2100 RPM.

thanks for taking an interest in my question.

Pat

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1967 D100 /225

Some of us catch on slow, and some of us don't.

Just a ?

Is a Weber DGV a 2-stage 2bbl carb?


This might work better than the 2bbls into a 1bbl hole as the primary barrel is smaller and would be better part throttle (better than even a stock 1bbl), and the combined area of the 2barrels is only a bit larger than a stock 1bbl.

With a nice funnel shape, the air can probably go thru the 1bbl hole better than you think it can.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Ed,
this is exactly what i'm thinking with my twisted sister logic.

by the way I checked out your page. I remember taking my 67 XLH to Morro way back in the eighties.

And I would rather talk about than do it. And if I must do it, do it tommorow. Or at least give it some serious thought and discussion.

I swear I shoulda either worked in a think tank or hired by the UN as an observer. I love to plan stuff out, then watch other people do it.

I'll spends months researching the right move. hem and haw and vacilate all over the place. I'll buy the wrong thing than make it work with duct tape and be no better off than i was before, except I have been amused. And of course I now am an expert on what I shoulda done.

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1967 D100 /225

Some of us catch on slow, and some of us don't.

That was in 2001. Some idiot climbed the rock and got stuck, as I was stopped and wondering what was going on, a local cop comes up to me and asks if I have a map......... Then proceeds to show me where to go on some off-the-beaten-trail roads.

I'll often not get around to doing something at all, if I can't do it right (esp. wiring) Learned all about half-assed wiring jobs in high-school... But otherwise I prefer to do everything myself.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

You mentioned Proline. Unfortunately they seem to be out of business so I can't go check their web page, but what I remember seeing there was a 3-Weber setup... that quite different from a 2 bbl on a six-runner manifold. With that you'd have the opposite problem... too much capacity, unless the engine is pretty heavily modified to pull more air. It would be akin to trying to drink from a firehose!

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.