biggest updraft carb?

[Anonymous-0]

whats some of the biggest updraft carbs available. What are they off of. I'm in search of one to support a high rpm puller

 

[oliver77]

The biggest one I know of is a stromberg 9. They are off of crop dusters (wink wink) therefore legal as it came off of an agriculture application. It should support about anything you want to do as far as rpm"s. I"ve seen them on 1100+ cu.in. engines.

 

[Future Puller]

What would be good for like around 400-420 cubic inches? Thanks!

 

[Coloring Book Crusader]

An Impco 200D propane carburetor is available with a 3.1875" throat and a 4" intake. It most certainly is not the biggest, but the 2.6875" version was available on a MM G1350 with the HD800 engine option. They were updraft, but obviously LP carbs could be mounted in any direction. 468CFM. The 200T was 680CFM with a 3.6875 listed throat.

 

[Anonymous-0]

Is those cfm numbers at current 1inhg standard or at the older rating 5 inhg standard ?

 

[Anonymous-0]

(quoted from post at 12:05:27 03/18/11) Is those cfm numbers at current 1inhg standard or at the older rating 5 inhg standard ?

1.5 IN HG OR 3 IN HG top measurement standards were typed wrong. Sorry

 

[Mopower]

Impco Manual

 

[Anonymous-0]

Its probably at 3 inches then . that can get a little tough to pull on a highly modified engine. unless you use some of the nascar tricks.
Carburetors are never to big . Some just aren't worked over as good as others.

 

[buickanddeere]

Any way to use fuel injection instead?

 

[JD DUDE]

find urself a zenith/bendix 1.875 or a 2.125 throat carb....work nice good control and if you put an adjustable load screw on one they can b cut back on fuel or let loose for more....should work good at 400 cu. in.

 

[BushogPapa]

Aircraft Carbs (recep) are available up to 100 sq in venturi size..
Is that large enough..?...

Ron..

 

[BushogPapa]

Probably about right for an R-2800 radial..

 

[wi50]

How fast do you intend to run the engine? 4 or 6 cyl? Are you allowed to run a fabricated manifold? Plenum size will play into the signal sent to the carb. Also one with a booster venturi will help a small engine pull a big carb, or makeing a custom venturi with a booster in a certain carb will help.

A NAR7B may be a good cantidate, or a NAR9B. It's going to depend on other factors.

Hall Scott engines run a big cast updraft, thogh not single barrel.

Contential ran them a bit larger upper body than the JD7700 gas combine carb if you had to stay with the "ag use" type of rule. Bored out and worked over with custom parts they can support a lot of engine.

If you don't need to use a "single barrel" use a Holley upside down. It'll take a little work to the float bowls, etc but it will work up-draft, and be a much better unit than anyof the above mentioned units. I've heard of the Predator carbs used upside down, though the Holley may be a better choice.

 

[Anonymous-0]

(quoted from post at 15:20:30 03/18/11)
How fast do you intend to run the engine? 4 or 6 cyl? Are you allowed to run a fabricated manifold? Plenum size will play into the signal sent to the carb. Also one with a booster venturi will help a small engine pull a big carb, or makeing a custom venturi with a booster in a certain carb will help.

A NAR7B may be a good cantidate, or a NAR9B. It's going to depend on other factors.

Hall Scott engines run a big cast updraft, thogh not single barrel.

Contential ran them a bit larger upper body than the JD7700 gas combine carb if you had to stay with the "ag use" type of rule. Bored out and worked over with custom parts they can support a lot of engine.

If you don't need to use a "single barrel" use a Holley upside down. It'll take a little work to the float bowls, etc but it will work up-draft, and be a much better unit than anyof the above mentioned units. I've heard of the Predator carbs used upside down, though the Holley may be a better choice.

lease read both pages of this article from a guy that wi50 says has no clue. that would be ?
http://www.candsspecialties.com/ratings.html

 

[wi50]

And how did you mess that up, go read it again if you must, I said you had no clue in the other thread, you were referring to the smoke from my tractor thinking it was water. I said you had no clue about it, and that it was simply oil. I'm certain that any one here can go and read it and interpret it the same way.

 

[wi50]

original poster,
if you are looking for the Stromberg updraft carbs, there is a "B" such as NAR9B. There is also a "D" it's simply has double float bowls. It's a bit bulky but function is the same. You may be able to find one easier or less expensive for some reason.

I've had several of them years back and sold but currently do not have any more.

 

[Anonymous-0]

what i'm looking for is an ag style updraft that will support a 400 cubic inch 6 cyl 7000 rpm engine. Does anyone know where i could look to find a stromberg?

 

[N/A puller]

I'm looking for an ag style updraft to support a 400 cubic inch 6 cyl 7000 rpm engine. where could i find a stromberg?

 

[wls9288]

Have some big zenith carbs for sale 952-913-0667

 

[Cody Adgent]

I have a couple NAR9 Stromburgs. They made an "A" and a "B". The difference is in the size of the Venturi. They are very simple carbs to work on and actually pretty simple to tune. I also have a Double NAR9, which is a two barrel updraft. I will take $250 for one if you are interested. 931-212-3602

 

[Future Puller]

Would a stromberg be overkill for a Waukasha 310 at around 400-420 cubic inches turning somewhere around 3200 rpm? And if so, what would be best for my application? Thanks!

 

[Future Puller]

What kinda carb is this? Someone might find that this looks fimiliar. Lol!

 

[chucksoliver77]

Future Puller, thats a zenith 63 series. i had one on my 310 and it worked very good. you may be able to get one from treadwell carb in treadwell, n.y. chuck

 

[Anonymous-0]

I'm just finishing my 404 cube oliver which I'm putting the "7700 gas" carb on. I had Treadwell carb rework it. I'm planning on turning my oliver about 4000 rpm. I'm using this because it will bolt to the stock 12 port manifold. Only problem is checking the oil due to the size of this carb, good luck.

 

[Cody Adgent]

Yes, A stromburg is overkill for a 400cid motor @ 3200 rpm. If you add another 1000-1500 rpm it will work fine.

Cody

 

[wi50]

future puller,
there are NAR6B and a NAR7B Strombergs that may be a good match on your engine. Just a smaller version of the NAR9 carbs. I would think that 400 inches at 3200 could use a 7, but I know a 6 would be a safe bet.

I ran a NAR6B on a 270 inch 4 cyl. It was hard to come off the line, but once the engine lit at 3000 RPM and up it was a great match. Even if I tried to leave at 4500 RPM it would stumble, die down and recoop, but the engine made better high end power with it than with a worked over Zenith.

I had sold or done some tradeing on them years agoe with Cody, he's likely got a lot of experience with the Strombergs, but that's all I can rember. I may be able to come up with some more new NAR6B carbs, I had a slug of them and sold several. A neighbor or two bought some just to have, I think they are still around. I'll ask around and see. Not much use for them around here anymore, not many small NA tractors left.

 

[Future Puller]

Ok I am hearing three different carbs for a 310 at 400-420 rpm turning @ 3200. #1. Stromberg Nar6 or 7 #2. Zenith and #3. John Deere 7700 gas combine carb. Out of these three which would be the best for this application? Thanks!

 

[Cody Adgent]

That is a carb off a 7700 John Deere Combine. It has a 2 1/8" throat in it. That tractor does look familiar...LOL

 

[Future Puller]

What kind do you have and what did they come from? Thanks!

 

[shrek]

this is on the wrong side for a 310 lol

 

[Future Puller]

Not when running the 310 diesel crossflow head......Lol!