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DCOE bog/hessitation

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I wouldn't put leather in a cold tank.
Spray it out with carb spray and blow it dry.
That's just me.....
 
That "washer" is a lipped cap. You need new ones... ~usually~ when you pry 'em out they deform too much to be useful a second time.

I usually smear some saddle soap on the leather seals. They'll soon enuff get petrol soaked. :wink:
 
I wanted to soak all four carbs that I have. The two from ther Alfa are clean enough to run, but the exterior is literally ratted out from a rats nest the was built on top of them. The two other carbs that are from the dual 1500 conversion kit look brand new from the outside, but one of 'em had a corroded looking emulsion tube that was really hard to get out. Looks like it may have had some water in it. The weird thing is, the rest of the carb shows no sign of that. It's just around that one tube. The bolw area looks great as well as the rest of the inside of it. I blew it out good and seems to be o.k, but would feel better if it had a bath.

I put the non-horn Alfa aux venturis in as the others were just WAY too loose. I have some horns here but they are too long and I don't have the clips for them. I can't use my current air filter with them. The Alfa ones are a lot tighter and I used the round gaskets I had w/ them. They don't budge at all now. That'll have to do till my venturis and horns get here.

I ordered three Weber books which are now here. "Weber Carburettors Tuning Tips and Techniques" may as well been writen by Shakespeare. Apparently this is the King James version. One thing it did say is that a worn out motor will be hard to dial in. Whilst this one has been freshened, one could say that the afformentioned assembly is factory correct far from not.

I have no idea what I just said; been reading that book far too much today. :crazyeyes:

Then again, it could have been written by Yoda. :wink:
 
Passini? Yeah, but there's a TON of info in there. Got mine back in the mid '70's, from Classic Motorbooks, IIRC... poor thing is lookin' a bit tatty now. :wink:
 
That's him . I can't understand a word he's sayin'. You can literally sctratch out half of what he says in one sentence and it'll still say the same thing. Guess he charged by the word.
 
I hate to speak out of turn but here goes.
I have a spitfire with a 1500 that's been hotted up.Yeah i know wrong forum. 10:1 compression, fast road cam, ported and polished head, lightened and balanced bottom end.
I had a single 45 and it drove me and a good friend NUTS. Said friend has a parts store and an assortment of weber bits and carbs to swap in and out. We spent days trying to get rid of the lag including changing the carb. I don't remember what was different about the progression holes between the different carbs. But they were different. At the end of the day we decided that the manifold was the problem. It didn't have a name cast into it so I don't know who made it. #1 and #4 were always lean and #3 and #2 were really rich according to the plugs. When you opened the butterflies all the way you could see the #2 and #3 valve guides. There is no way that the pump jets were squirting around a corner to get to #4 and #1.
I wound up buying a set of dual 40's that are awsome.
So in summation.
Unless you have a buddy with a bunch of Weber parts laying around. You may spend a kings ransom only to find out that you have a poorly designed manifold.
Mike
 
Oh and one more thing. My single 45 and my 40's have a set screw that pushes the aux. Vent. towards the float chamber so they suck air through the Aux. Vent. and not the choke.
 
This thread talks about dealing with what Spitfyre pointed out and how it can be dealt with. There is more than one problem with these types of manifolds. They are discussed in the comments by others.
www.triumphexp.com

Dealing with the single Weber DCOE the bog and uneven mixture problem on a 4 intake port head like the later Spitfires and 1500 MG Midget. By clocking the accelerator pump jets. : Spitfire & GT6 Forum : The Triumph Experience

A little history on my car before what I did to it . I bought the spitfire with this carb several years ago and rebuilt the engine at that time. Before getting a wideband gauge I built the narrow band o2 gauge that I saw on the buckeye triumphs site to deal with some of the problems. The gauge show
www.triumphexp.com www.triumphexp.com
 
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