Technical Triple Deuce Missing & Hesitating

Instead of adding both sec carbs at once, can I just add on and see how it responds. Get that one responding good then add the 2nd sec carb? Or do I need to add both sec carbs at the same time?

 

Put them both back on. Someone in another related thread kept saying all there carbs are separate and independent but its not that way really. The secondary carbs are separate sure, but function as a unit. There are people who don't agree with this but just make sure both secondary carbs are identical in the way they are set up and adjusted.

 

You might want to try this test again when you get it back together.
The throttle blades should fit tightly, they are supposed to be beveled also. Looks like that black stuff in the bore was there to help with this seal.
Maybe you lost some of it after your first couple hundred miles and overnight it runs crappy.

Fitting those blades is not a quick thing. There's lots of fiddling and testing. The end bases should be thicker and the blades more oval. This lets them seal tightly and easily opened. Ideally There should be no air passing the blades or fuel dripping. A 100% air seal isn't going to be possible but real close to it is what you need.

So Glad that you are on your way to sorting this out.

 

35fordrat. Glad you are on the way to solving your problem. We learn a lot from suggestions and the feedback you provide. Ebfabman mentioned some brush on sealer for the secondary carb butterflies/bores. Anyone know the name of this product and where to get it? Any comments on how well it works?

 

Splitbucket, that stuff is still available and I know some will disagree, I wouldn't use it. It does work but it's kind of a bandaid and won't keep seal. I think you're better off getting a good fit with the butterflies in their bores as good as possible and using a good return spring(s) on the secondary carbs then start fine tuning. Again this is my opinion and others may have good advice that works also.

 

Ebfabman. Thanks. I'm collecting info in preparation for expanding from the center 2 Hollys to the outer 4 on my 6X2 setup. I am always looking for more info. Hopefully, name of product will surface here, along with more comments.

 

It's called DAG 213. An internet search will find a source.

 

ebfabman. Thanks. It's always good to have backup options if something doesn't work out. Also might be good for troubleshooting.

 

That's nice that you agree, but neither you nor he has bothered to explain just what is BS, so how much help is that really?

If you guys are gonna run around calling things "BS", it would be only proper and manly to spell it out, and in no uncertain terms.

These vague comments do you no credit.

 

I'd think about 6x2 only if I had a V-12!

4x2 for a V-8

3x2 for a V-6

But of course if you run a plenum and restrictor plates, all things are possible!

 

Ulu, I have 1957 era nailhead powered Model A. I like the look. My go fast days are over. I'm currently running on the middle 2, but would like to open up the end 4 if the mood hits me. The Holly 94s flow about 155 or so CFM, so if all 6 were wide open, it would still be only 900 CFM or so. By the way, if anyone else is interested, ebfabman put us on to the venture/throttle plate sealer DAG213. Here is the info on it: Produced by Acheson Corp, product has been renamed to "Bonderite L-GP213". North American HQ is in Port Huron, Mi 810 984 5581, have not found a retail source yet, may have to call.

 

This guy was kind enough to post some very informative videos on Pontiac tri-powers. I think he says he has a source for the sealers.

 

It sounds awesome.

I want a V-12 that'll fit in my Plymouth.

Then I'll think about feeding a dozen butterflies.

 

Can't you lap the butterflies into the bores or something?
It'll work for a while, but the idea of sealant in the throat just stinks to me.
Was this really considered a "factory" method?

 

I couldn't agree more. Seems pretty cheesy to me. I just get the butterflies to fit as good as possible and tune accordingly.

 

When I went from na to supercharged my butterflies were leaking and I couldn't get my truck to idle below 2000. I used lapping compound and a blunt end punch to set the butterflies in the bore. It must of worked it idles now.


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