tegwin
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| posted on 13/3/09 at 09:26 PM |
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Anyone know anything about Stromberg C.D.S.E.V side draught carbs?
As the question really...
I have a pair of them fitted to the TR6 engine in the TVR...
The float bowels had quite a lot of sediment at the bottom so I want to clean out the carbs...
Only problem is.. working out where to get replacement parts from...
And working out how to retune them,.... the mixture screw is not imediatly obvious.... which is annoying..
Anyone know anyhting about them??
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mr henderson
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| posted on 13/3/09 at 09:30 PM |
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I'll take your word for it that they are Strombergs, but they don't half look like SU's
Used to know a bit about them but I've forgotten now, I'm afraid.
I expect British Trident will be able to answer your question
John
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flak monkey
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| posted on 13/3/09 at 09:35 PM |
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They will be Stromberg 175 CD-2 SE Carbs
Service kits pop up on ebay every now and again. Other than that a quick google will probably find you some relevant info...
David
Edited to add theres a service kit on ebay here:
Linky
[Edited on 13/3/09 by flak monkey]
Sera
http://www.motosera.com
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cliftyhanger
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| posted on 13/3/09 at 09:37 PM |
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Def SU HS6 carbs from a dolly sprint. The stombergs have the float chamber integral to the main body, those have a seperate float chamber. Tops of
which will say SU.
The adjuster is a nut under the body of the carb where the jet is attached. http://www.mintylamb.co.uk/?page=sutune.htm
Bits can be had from burlen fuel systems. They are the main suppliers to everybody.
[Edited on 13/3/09 by cliftyhanger]
[Edited on 13/3/09 by cliftyhanger]
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flak monkey
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| posted on 13/3/09 at 09:46 PM |
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You are quite right...
This is a 175 Stromberg
Sera
http://www.motosera.com
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tegwin
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| posted on 13/3/09 at 09:47 PM |
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Thanks for the info 
They dont look quite like any HS6 carbs I can find pictures of on google though.... :s
I might be able to get away without buying new parts... I just need to be able to clean them of the sediment etc and put them back togehter..... does
this sound a bad idea?
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tegwin
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| posted on 13/3/09 at 09:49 PM |
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quote:
Originally posted by flak monkey
You are quite right...
This is a 175 Stromberg
That is weird.... the origional owners manual for this car deffinately says Stormbergs.... I guess they changed their mind.... 
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flak monkey
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| posted on 13/3/09 at 09:49 PM |
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quote:
Originally posted by tegwin
Thanks for the info
They dont look quite like any HS6 carbs I can find pictures of on google though.... :s
I might be able to get away without buying new parts... I just need to be able to clean them of the sediment etc and put them back togehter..... does
this sound a bad idea?
HS6's
You should be fine stripping them and cleaning them. You will need some new gaskets though ideally.
Linky
David
Sera
http://www.motosera.com
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flak monkey
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| posted on 13/3/09 at 09:53 PM |
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quote:
Originally posted by mr henderson
quote:
Originally posted by flak monkey
HS6's
Right back atcha
I stand corrected.... 
Sera
http://www.motosera.com
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tegwin
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| posted on 13/3/09 at 09:54 PM |
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Agh quality.... will give it a go tommorow... might see if I can polish up the bell top things a bit as well
Weird that mine are much shorter than most in pictures..... Must be an early version or something weird... nothing with this car is
"normal"!
Any... once again, Locosbuilders answers another useemingly unanswerable question!
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rusty nuts
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| posted on 13/3/09 at 09:55 PM |
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As said def SUs, Dead simple carbs that had origins about a century ago . Service kits and also the needles readily available . Might be worth
removing the dashpot (top cover with the plastic damper in the middle) and the piston to remove the needle which will be marked . Quote the markings
on the needle to ensure you get the right ones. Suspect the engine you have isn't a TR6 which IIRC were all injected?? Could be you have an
engine from a Triumph 2500?. Is there a tag on one of the float chamber screws ? ,again quote any numbers when ordering parts. Check for any spindle
wear before going too far with the carbs .Can recommend the Carburretor Exchange in Leighton Buzzard for any carb repairs
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flak monkey
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| posted on 13/3/09 at 09:55 PM |
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When you get them off it will be stamped on them somewhere exactly what they are
Sera
http://www.motosera.com
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tegwin
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| posted on 13/3/09 at 09:59 PM |
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quote:
Originally posted by flak monkey
When you get them off it will be stamped on them somewhere exactly what they are
SShhhhhh.... that would be FAR to inteligent
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tegwin
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| posted on 13/3/09 at 10:01 PM |
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quote:
Originally posted by rusty nuts
As said def SUs, Dead simple carbs that had origins about a century ago . Service kits and also the needles readily available . Might be worth
removing the dashpot (top cover with the plastic damper in the middle) and the piston to remove the needle which will be marked . Quote the markings
on the needle to ensure you get the right ones. Suspect the engine you have isn't a TR6 which IIRC were all injected?? Could be you have an
engine from a Triumph 2500?. Is there a tag on one of the float chamber screws ? ,again quote any numbers when ordering parts. Check for any spindle
wear before going too far with the carbs .Can recommend the Carburretor Exchange in Leighton Buzzard for any carb repairs
Thanks for the info
What exactly do you mean by spindal wear?
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rusty nuts
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| posted on 13/3/09 at 10:13 PM |
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Check for any movement in the throttle spindles where they go through the carb body. Any amount of movement other than rotational (up and down , side
to side)will cause air leaks and upset any adjustment making the engine run rough. Spindles can be replaced but the bodies can wear , sorting that out
isn't really a D.I.Y job
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mr henderson
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| posted on 13/3/09 at 10:16 PM |
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All carbs wear, if the cost of sorting them out looks a bit much. consider megasquirt. 2.5 Triumphs run good with PI!
John
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tegwin
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| posted on 13/3/09 at 10:21 PM |
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quote:
Originally posted by mr henderson
All carbs wear, if the cost of sorting them out looks a bit much. consider megasquirt. 2.5 Triumphs run good with PI!
John
I had this discussion with a mate this evening...
We decided that the TBs of a BMW straight six would fit quite nicely Sadly this car has already eaten my overdraft... so its going to be a while
before I can make ANY improvements
Appart from the gunk and the sediment in the carb they look remarkably un-used...I will give it a thorough check over for play though!!
[Edited on 13/3/09 by tegwin]
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SPYDER
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| posted on 13/3/09 at 10:25 PM |
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They look like HS8's to me. Thats 2" SU's.
We used to use them on our racing TR4.
Here are some on a 1972 TR6.
See link for more pics.
http://www.lastdeadlast.com/coppermine/thumbnails.php?album=1&page=1
Geoff
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tegwin
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| posted on 13/3/09 at 10:34 PM |
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Hmm.... I will have to clean up the castings and find the number and settle this in the morning....
Im still not convinced its either!
Um... Check this
out...Check this out .... I wonder
[Edited on 13/3/09 by tegwin]
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mark chandler
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| posted on 13/3/09 at 11:46 PM |
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They have remote reservoirs so the mixture is turning the big brass nut directly underneath the centre of the main body. You will know you have the
right adjustment if you see the brass sleeve that the needle drops inside raise or lower when looking directly in the top of the carb..
On old carbs the needle has to be perfectly straight and central within this hole or the whole assembly will bind up. If you lift and drop the piston
it should fall with a satisfying clunk when it hits the floor of the carb body, later ones are sprung loaded. That looks early!
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Canada EH!
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| posted on 14/3/09 at 01:01 AM |
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Lots of TR6's her in Canada, never seen one with FI, most had SU's, some with Strombergs IMHO.
I used to look after a badly restored one with SU's, looked very nice till you checked the gaps at the front and rear of the doors, real pain to
get consistant gaps.
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cliftyhanger
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| posted on 14/3/09 at 05:53 AM |
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As I said earlier, def HS6 carbs off a dolly sprint, they have a shorter dashpot to give bonnet clearance. I have a set or two in my garage. The
needle will be sprung, not the earlier fixed one. The dolly sprint needles are about right for a 2.5 triumph 6.
These carbs were a good upgrade on imported TR250/6 engines from the ststes, as the emission controlled strombergs were hopeless. Also many people
consider the SU to be better than UK strombergs too. Or it may be somebody just had a set and put them on a PI lump, post the engine number and I van
dig around for info.
The carbs are dead easy to service. If the butterfly spindles are worn then fitting new ones (£10 each) will help a lot even if there is some wear in
the body. Oversize spindles usd to be available too, not sure thesedays.
The jets can cause problems too, especially if fitted with "waxstats" as they can cause excessive leaning off of the mixture when hot, and
being next to the manifold is not good! A heatshield is available which helps a lot. The waxstat jets are spotted easily as they have a flat bottom
and are metal at the bottom, "normal" jets are plastic at the bottom as per link I gave earlier on tuning.
There is also a locost method of "dewaxstating" a jet for 2p here http://www.nireland.com/gd.triumph/waxstats.htm
Finally stripping and cleaning will help, but do not be tempted to polish inside the dashpot and piston, it will ruin the carb. And keep them as a
matched pair!
http://www.sucarb.co.uk/
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britishtrident
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| posted on 14/3/09 at 08:43 AM |
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They are the standard HS6 from a 2500TC --- the airfilter plate is dished so they look shorter. You will probably find they are
"Waxstat" type with a two pennce sized wax thermostat at the botom of the jet holder --- HS series carbs weren't great the waxstat
type was a pain in the bum.
The SU ref number with be found on a tag held on by one the screws that hold the float bowl lid on.
Burlen services or Rimmer Brothers can supply spares.
Take care when dismantling the carb the carb dashpot and piston are made to quite close tolerances, any dirt rough treatment will cause the piston to
bind in its bore.
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cliftyhanger
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| posted on 14/3/09 at 09:21 AM |
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Disagree, def the short dashpot sprint version! I have a few pairs of each in the garage.
Makes no odds to the rest of the carb though.
I would avoid rimmers, most staff are not too knowledgable.
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tegwin
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| posted on 14/3/09 at 10:01 AM |
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quote:
Originally posted by cliftyhanger
As I said earlier, def HS6 carbs off a dolly sprint, they have a shorter dashpot to give bonnet clearance. I have a set or two in my garage. The
needle will be sprung, not the earlier fixed one. The dolly sprint needles are about right for a 2.5 triumph 6.
These carbs were a good upgrade on imported TR250/6 engines from the ststes, as the emission controlled strombergs were hopeless. Also many people
consider the SU to be better than UK strombergs too. Or it may be somebody just had a set and put them on a PI lump, post the engine number and I van
dig around for info.
The carbs are dead easy to service. If the butterfly spindles are worn then fitting new ones (£10 each) will help a lot even if there is some wear in
the body. Oversize spindles usd to be available too, not sure thesedays.
The jets can cause problems too, especially if fitted with "waxstats" as they can cause excessive leaning off of the mixture when hot, and
being next to the manifold is not good! A heatshield is available which helps a lot. The waxstat jets are spotted easily as they have a flat bottom
and are metal at the bottom, "normal" jets are plastic at the bottom as per link I gave earlier on tuning.
There is also a locost method of "dewaxstating" a jet for 2p here http://www.nireland.com/gd.triumph/waxstats.htm
Finally stripping and cleaning will help, but do not be tempted to polish inside the dashpot and piston, it will ruin the carb. And keep them as a
matched pair!
http://www.sucarb.co.uk/
Bingo! They are indeed fitted with Wax-stats... Time to go dissasemble and see what the damage is
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