Su carbs on a Plymouth...maybe?

[Flatie46]

Today I went to junkyard and while lookin around I spotted an old Jaguar. I was interested in Mopar stuff and wasn't really going to check it out but my friend raised the hood and I happened to notice it had a dual SU carb setup. Now I've been contemplating a dual carb setup and I considered buying this if the guy was reasonable. I've seen SU carbs on Harleys but never worked on them and don't know much about them. Can anybody tell me anything about these carbs? Do they offer different jet sizes and are there rebuild kits available and reasonable. Are they dependable when they are right? Any thoughts, opinions?

[greg g]

Su carbs have adjustable main jets and are fairly easy to tune, and simple in operation.

The Jag would be a good donor since the engines are about the same size. Mopar 3.7 liter, and Jag 3.8.

You would need to fab up some adapters or new intake manifolds, and linkage.

As air goes through the carb it lifts a piston, the piston draws a tapered needle out of a jet orifice. the higher the needle goes, the thinner the needle gets,and the more fuel folw around itinto the air fuel mix. I gave them a thought for a minute, but thefenton intake came intomy possesion. The carb also has some adjustment as you canset the initial position of the jet by means of a threaded piece thatmoves the jet up and down in relation bottomed needle. The Japenese copied and minaturized them for motorcycle use.

Give member Moose a PM and see if he might make you a manifold to mount them.

http://en.wikipedia.org/wiki/SU_carburetor

Edited January 2, 2010 by greg g

[claybill]

SU's are sidedrafts.... B&B carters are downdraft....

you will need manifold re-configuration of course. if you get the SU's, GET THE MANIFOLD TOO.

bill

[claybill]

also used on opels and OPEL GT's. there is a club for that car..check out opelgt on ebay for carb parts.

bill

[Flatie46]

Su carbs have adjustable main jets and are fairly easy to tune, and simple in operation.

The Jag would be a good donor since the engines are about the same size. Mopar 3.7 liter, and Jag 3.8.

You would need to fab up some adapters or new intake manifolds, and linkage.

As air goes through the carb it lifts a piston, the piston draws a tapered needle out of a jet orifice. the higher the needle goes, the thinner the needle gets,and the more fuel folw around itinto the air fuel mix. I gave them a thought for a minute, but thefenton intake came intomy possesion. The carb also has some adjustment as you canset the initial position of the jet by means of a threaded piece thatmoves the jet up and down in relation bottomed needle. The Japenese copied and minaturized them for motorcycle use.

Give member Moose a PM and see if he might make you a manifold to mount them.

http://en.wikipedia.org/wiki/SU_carburetor

Thanks for the link and advice, the link was very informitive.

[Andydodge]

Skinner Unions (SU's) are to a Pommy what Holleys are to you Yanks, if you need any bits for SU's try a UK based company..........don't forget that Jags are DOHC, and a much higher state of tune to our mopars so you might be better off getting some smaller SU's from MG's, Triumphs etc.......btw SU's are known by their throat size, ie, 1&1/2", 1&3/4", 2" etc..........andyd

[Flatie46]

also used on opels and OPEL GT's. there is a club for that car..check out opelgt on ebay for carb parts.

bill

There was an Opal GT there also didn't raise the hood though. Were their two carbs on them also? Were they smaller being the Opals were 4 cyl?

[greg g]

Carbs are sized to the engine, my AH Sprite has 1 inchers, the bigger jags areprobably 2 inch. I seem to remember the sedans had 2 2 inch and the e type had 3 1 7/8in deals.

Daimler used them on their little 2.5l hemi V8. Rover used 2 on an angled high rise ram style intake on their Buick sourced v8. Datsun (Nissan) used the Hitachi clones on the early "Z" cars.

here they are on the rover, The mounting angle is typical to their semi side draft orientation.

[Flatie46]

I was checking out what was available and noticed rebuild kits were kinda pricey but I guess you've got to figure in it's for two carbs though.

[Tony WestOZ]

I`ll see if I can find some more

[Andydodge]

Tony, some interesting carby setups......thats a big SU blowing thru the turbo........also is that triple setup using bike carbs?..............or are they Stromberg CD's like what the Holden Torana XU1 used?........andyd.

[Tony WestOZ]

Tony, some interesting carby setups......thats a big SU blowing thru the turbo........also is that triple setup using bike carbs?..............or are they Stromberg CD's like what the Holden Torana XU1 used?........andyd.

Stromberg`s I say Andy.

I thought I had some more SU stuff.

[moose]

Here's mine on my '54. Built this back in the 90's in college. Mikuni 32mm I think. Re-jetted, still didn't have enough high end power, but very responsive and was good on gas around town.

I'm getting ready to start on a new side draft manifold for my Model A using Carter YH's from turbo Corvairs. It's going to be a similar style, but equal length long run intake tubes

[Flatie46]

Here's mine on my '54. Built this back in the 90's in college. Mikuni 32mm I think. Re-jetted, still didn't have enough high end power, but very responsive and was good on gas around town.

I'm getting ready to start on a new side draft manifold for my Model A using Carter YH's from turbo Corvairs. It's going to be a similar style, but equal length long run intake tubes

I had given motorcycle carbs a thought more than once. I've always liked the S&S carbs I've run on harleys in the past and would love to have a pair of super E's on it with the beautiful teardrop breathers but they're about $350 a piece. I wonder how that one would have run with 4 mikunis or a 4 keihin set up? I think the smaller the throat size the more responsive to a point, then I think you get into restricting flow.

[greg g]

Boy that truck engine looks like its a pretty easy deal to fab up. A small turbo froma Saab or Volvo, or VW Audi, might be just the ticket for a similar set up. The only problem is with the suck through, the fule charge gets really hot.

Guess head gaskets might be a problem, but there is certainly room to plumb a turbo on the P15.

[james curl]

The Texas Inliners International chapter head runs a GMC I/6 powered 29 Ford roadster at Bonneville and he has all types of induction systems for the GMC. But the home made manifold with the three S&S carbs ran the fastest the car ever ran at Bonneville.

[Flatie46]

The Texas Inliners International chapter head runs a GMC I/6 powered 29 Ford roadster at Bonneville and he has all types of induction systems for the GMC. But the home made manifold with the three S&S carbs ran the fastest the car ever ran at Bonneville.

They're awesome carbs and very easy to jet and tune. I liked the "E" and "G" series alot, they have an accelerator pump where the "B" does not. I thought they would do well, thanks for the post.

[greg g]

Some basic application info for SU carb/s