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Triumph TR6 - SU Conversion

HI ,
I just obtained a set of rebuilt SU HIF carbs, trouble is there is no linkage adapters with it. Anyone know where I can look ? It looks not too hard to make my own but if it's easy to pick one up then all the better.
Thanks
Charlie
Charlie B.

Charlie:

Sorry, I don't know where to get adaptors but if it's any help, TR4A's had SU's; at least mine did so maybe you could get something from the TR4 threads.

Bob
1976 - TR6
Bob Evans

Charlie, which linkage? I have SU's, and the choke cable needs an adapter, but I don't think anything else is different.

John
JL Bryan

Hi John,
On mine the SU's throttle shaft is not smooth like the Zenith..it's threaded so it requires a different rod that connects both carbs up to the regular linkage that pulls down to engage the throttle
Charlie
Charlie B.

Charlie
I did this conversion a while back, I used the linkages off a TR7 which are the same but the interconnecting rods are shorter, all I did was braze the TR7 levers and cable connection onto a new bit of 5/16" dia rod the correct length. It doesn't have to be a TR7 [which are easy come by on this side of the pond] any car that had a pair of SUs would do.
I think you can also buy the linkages new from Moss UK.
Ron
R. Algie

Thanks Ron,
I've tracked down a guy who has the end L shaped parts to connect the rod to the throttle and I'll make a rod up.
Did you notice any difference after you installed your SU's ? I assume you had ZS on first ?
Charlie
Charlie B.

Hi Charlie
Difficult to say because I changed the cylinder head to an early big valve PI one at the same time along with one or two other mods, the car is a lot faster and more economical but the Strombergs were well past their sell-by date and the SUs were newly reconditioned by Burlens so I would think they would be better.
Personally I prefer SUs, but that's probably because they seem to be more DIY friendly.
Ron
R. Algie

Hi Ron.
I spent the week-end learning lots about my SU's and your right they are more user friendly than my ZS
I've been told to notice a big improvement by many who have SU's......I'll let you know !

Found this on the web... Back in the early days TRiumph was going to use SU's in all their cars but SU wanted double what they were charging MG for the carbs so Triumoh designed their own being careful not to infringe on patents and gave the job to Zenith

Charlie
Charlie B.

Gents:
While on the subject of SU's,I've read (somewhere)
about moving up to the 2" size for the 6.
Has anyone out there made this swap and what
are the results?
I assume a new a new intake manifold and appropriate cylinder head work would be part of the procedure.
Also the stock exhaust header would have to go?
D.
dennis

"Found this on the web... Back in the early days TRiumph was going to use SU's in all their cars but SU wanted double what they were charging MG for the carbs so Triumoh designed their own being careful not to infringe on patents and gave the job to Zenith"

Skinners Union had become another component of Lord Nuffields BMC empire by then. Why give the competition the insiders price break?
SteveP

The 2 inch SU HD8 carbs will easily bolt onto a late model TR6 intake manifold. With 30 percent additional flow capability it felt as if the car had additional punch on the low end - For a Carb.

Photos of HD8s mounted on a 74 1/2 TR6 from a long-long time ago can be found at:
http://www.turbo-tr6.info/tr6_engine_HD8.html
Sorry about offending those purists who will have a fit about the purple valve cover.

Given the difficulty in locating HD8s carbs and needles I doubt many would be willing to make the change.

Hope this helps
Lee
Lee Janssen

This thread was discussed between 14/01/2006 and 17/01/2006

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This thread is from the archive. The Live Triumph TR6 BBS is active now.