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Dual Throat SUs?
http://forums.ctzcc.com/viewtopic.php?f=4&t=5025		 Page 1 of 1
Author:  Frank T [ Sun Jun 06, 2010 9:41 am ]
Post subject:  Dual Throat SUs?
When I was a kid back in the late Chrome Age, SU carburettors made a twin-choke (dual-throat) performance carb called the SU DU6. Some of them had a single dome and later models had dual domes, but all had twin 1-3/4" throats.

http://img529.imageshack.us/img529/4108 ... rbsxv9.jpg

These were popular for competition use and I recall zeeing them on some Lotus7s and Cooper Climax formula cars of the late 1950s. They made little 4-banger DOHC engines think they were Superman and they were very popular for awhile. SU only made a couple batches of them, then discontinued them in the early 60s because they were not financially viable. Altho they ran fine on the street, they were so costly that only a handful of racers ever bought them.

I've been toying with the idea of mounting a set of these dual-throats on my Z for quite some time. I was thrilled today to hear that SU (now Burlen) is considering a re-run of these great little carbs.

If I used three of them, they would (might) equal a set of triple Webers with half the tuning hassles. Dave Russell went thru a lot of trouble to make a triple SU setup for his Z, because he had to fabricate a way of arranging clearance for a third floatbowl. If they reintroduced the DU-6, that would no longer be a problem.

Has anyone heard anything about them?

Frank

Attachments:
File comment: Dave's great triple SU setup could have benefitted from the old dual-throat DU-6 SUs.
Picture 123.jpg
Picture 123.jpg [ 120.13 KiB | Viewed 11425 times ]
Author:  Kathy & Rick [ Sun Jun 06, 2010 2:27 pm ]
Post subject: 
First time for me, Frank! :shock:
But obviously it's for real, cuZ there they are in the picture. 8)

Probably a little before my time. :?
I'm not older than dirt, but I did learn how to swim during the Flood
when I missed the boat. :wink:
And I'm created; I "don't have no monkey for an uncle." :x
Although I do like to monkey around. :lol:

All Z Best,...........................Rick (and Kathy, of course)
Author:  saabster [ Mon Jun 07, 2010 6:51 pm ]
Post subject: 
Frank, this is new to me, and I even asked a friend who imports British cars and parts, he had never heard of them…. But when was the chrome age?

Dave
Author:  Kathy & Rick [ Mon Jun 07, 2010 9:49 pm ]
Post subject: 
saabster wrote:
Frank, this is new to me, and I even asked a friend who imports British cars and parts, he had never heard of them…. But when was the chrome age?

Dave


Ah, ah, ah, ah, ah!!! Dave, you are showing your age! (In reverse!)
Even an "antiquated flatulation" like me who lost most of his memory
millennia ago, can pin that onto the late 50's and early 60's.

Especially 1958, the year in which almost two-thirds of a car's weight
was in half-ton bumpers with embellishments that would make Dolly
Parton look small, garish grilles, flamboyant side mouldings and other
assorted trim, spinner hubcaps, interior and dashboard appointments,
and other miscellany which would induce you not to drive in direct
sunlight due to the glare!!!!
I think that is the year that Foster Grants came into prominence.

Nowadays we are more genteel. We call it ARGENT trim.

Uh, Frank, I sort of stole your thunder. Did I forget anything?

All Z Best,......................Rick (and Kathy, of course)
Author:  Frank T [ Mon Jun 07, 2010 11:07 pm ]
Post subject: 
Right Rick.

Dave, a picture's worth a thousand words.

Here's a typical Chrome Age family sedan. Don't laugh. A lot of us spent our childhoods washing these dinosaurs on Saturdays, before we were allowed to run off and play ball with our buddies.

http://theinvisibleagent.files.wordpres ... _buick.jpg

http://pagesperso-orange.fr/trombinosca ... 580205.jpg
Author:  Carl Beck [ Tue Jun 08, 2010 6:35 am ]
Post subject:  When American Cars were Freeway Cruisers NOT PT's
A thing of beauty is a joy forever - wish I still had this one..
1962 - I was 17 and livin large..

I could Simoniz this monster in less than an hour... 4500 lbs of rolling fury..

This is an old photo that has faded - but the car was Fire Engine Red!!

Attachments:
File comment: 1958 Olds 88 - J2
ChromeAge58.jpg
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Author:  Paul [ Tue Jun 08, 2010 6:47 am ]
Post subject: 
How about just using bigger SU's ? I have one from an old Harley that makes mine look like dwarfs. Too bad I only have one.
Author:  Frank T [ Tue Jun 08, 2010 9:15 am ]
Post subject: 
BLUFF! BLUFF ALERT! I call a Bluff.

Carl, I say there was no way you could have SimoniZed a '58 Olds in less than an hour. Even if that skinny kid was helping you and you had a power buffer, it would take you longer than that. Even if you let that skinny kid drive the car around to dry the SimoniZe before buffing it out, it would take longer than that.

I say there is NO WAY to SimoniZe an entire 1958 Oldsmobubble in less than an hour. I know for a fact there is no way to do a 1948 Buick Roadmaster, a 1957 Plymouth Savoy or a 1959 Chevy Biscayne in that amount of time.

Does your time estimate include polishing all the chrome? :shock:

Frank
Author:  Carl Beck [ Tue Jun 08, 2010 10:26 am ]
Post subject: 
Hi Frank:
See the large Garage Doors in the photo, behind the car. My older brother George and I washed, polished and wax'ed Trucks in those service bays, the type of TRUCKS that comprise 18 wheelers{ aka Tractors}. Those took anywhere from one to two days, depending on how neglected or well cared for they were. At that time I was 13 and my older brother was 17. Washed, polished and Simoniz'ed for $28.50, or Blue Coral'ed for $38.50. That was where part of my money came from to buy my first few cars.

The great thing about the old Simoniz was once you had a good coat on a good finish - you could maintain that finish fairly quickly. You would rub it on and in - then wipe it off. You NEVER wanted to let Simoniz dry on the car, if you did it was very very hard to remove.

I think one of the things I loved the most about the BRE Baja Z was the fact that SIMONIZ was one of the main sponsors. :-)

Yep - I could SIMONIZ that Olds in less than an hour - without getting tired or breaking a sweat...No Roof To Wax here either.... Doing the detail work of going over all the Chrome... that was an afternoon's work.. ;-)

From Memory Lane....,
Carl B.
Author:  ZCARNUT [ Tue Jun 08, 2010 10:35 am ]
Post subject: 
I believe it Carl, but who is the skinny kid with your car?????

:wink:
Author:  Frank T [ Tue Jun 08, 2010 11:53 am ]
Post subject: 
:lol:

He must have been the hired help!

Poor kid ~ with all that work to do, he probably never grew up to be big and husky like Carl :lol:

(There's still no way to SimoniZe a '58 Olds in an hour :? )
Author:  Carl Beck [ Tue Jun 08, 2010 3:19 pm ]
Post subject: 
Hi Guys:
You know it's hard to believe, but I tell people that when I was young, I was skinny - and when you are skinny and live in Ohio - you are COLD all 9 Months of Winter.... That's the reason I live in Florida today!

I weighed about 145lbs in that first picture. I never really put on much weight until I was about 24.. That's when I went into the Service - amazing what three square meals a day will do for you! As I recall I was about 165lbs when I went in - and 195 lbs coming out but it was all muscle then...

Ah the good old days,
Carl B. :lol:
Author:  Kathy & Rick [ Tue Jun 08, 2010 7:25 pm ]
Post subject: 
Carl Beck wrote:
Hi Guys:
You know it's hard to believe, but I tell people that when I was young, I was skinny - and when you are skinny and live in Ohio - you are COLD all 9 Months of Winter.... That's the reason I live in Florida today!

I weighed about 145lbs in that first picture. I never really put on much weight until I was about 24.. That's when I went into the Service - amazing what three square meals a day will do for you! As I recall I was about 165lbs when I went in - and 195 lbs coming out but it was all muscle then...

Ah the good old days,
Carl B. :lol:


I used to weigh 150 lbs a few years ago. :? :roll:
I think I was about age 5 at the time................ :oops: :lol:
~Rick~
Author:  Frank T [ Wed Aug 15, 2018 10:35 pm ]
Post subject:  Re: Dual Throat SUs?
If anyone still remembers this post, I have remained in frequent contact with Burlington carburetors in England, owners of Skinner's Union (SU) carbs today. They are so tired of hearing me ask when the DU6 might be available, they no longer answer or return my emails.

HERE is the prototype "new" DU6, copied from the old one, but now they come in two throat sizes:

https://www.sufuelpump.com/products/auc ... 2726077466

Happily I note they now have a US distributor in California. No more long distance calls to England in the middle of my night.

The estimated cost for a single unit puts me out of the running for two DU6 units. I would be smarter to just wait and let one of you guys buy a pair, then steal them off your car. 8)

Yo Ho Hooooo! :twisted:
Author:  johnnyZ [ Fri Aug 17, 2018 9:30 am ]
Post subject:  Re: Dual Throat SUs?
Boy, those memories! :roll:

Yep, between the Buicks, Olds and Caddys in that era there was a lot of elbow grease and Simonize applied back then. Just think of all those chromium plating plants creating 3-eyed fish in our waterways!

Oh, I also left high school at 145 lbs. After 2 years of Tech College, I was also 195 lbs of muscle....all of it between the ears though. :P
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