• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

Stromberg Carb Question

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
Hi there, I have twin Stromberg 175s CD-2 carbs on my Vauxhall Viva GT. The car came with rebuild kits. When I took the first carb apart, the shaft is pretty worn. Are oversized shafts available? if so, where?

thanks all
 

glemon

Yoda
Country flag
Offline
Many times replacing the shaft with standard size will get you back into spec.

I put new shafts of my TR4 strombergs and did not rebush the bodies and it now runs great.

You could also try Burlen fuel systems in the UK.
 

tdskip

Yoda
Country flag
Offline
glemon said:
Many times replacing the shaft with standard size will get you back into spec.

I put new shafts of my TR4 strombergs and did not rebush the bodies and it now runs great.

You could also try Burlen fuel systems in the UK.

+1. Is there anyone local you could borrow a shaft from to give that a try. Moss and others all carry over-sized shafts.
 

Rrbbeerrttoo

Banned
Offline
Good engineering designs allow for the cheaper or simplest intalled component to wear out first. Installing a larger diameter shaft is simple but may require new body sleeve or may need reboring existing bush for best/optimum clearance, if there is material to rebore. Shaft replacement is easy. Reboring in place but may be ok, but replacing bush is more work!. Too many ifs w/o inspecting, testing, etc.

Or, just to test, can't you use the shaft coupling the two carbs for the test; it is same diameter as the shaft thru the carb bush.

Robert
66'tr4a irs
CTC53788L
 

TR3driver

Great Pumpkin - R.I.P
Offline
FWIW, I've found that a little bit of wear doesn't really hurt all that much anyway. In operation, the shaft gets sucked against the housing on the vacuum side, so the leak (if any) is on the low-vacuum intake side. Makes the idle mixture a bit leaner than it would be otherwise, but since the mixture gets adjusted at idle, you can correct for that. Then the only downside is that the cruise mixture is a bit richer than it needs to be. Fuel mileage will be off, but performance about the same.
 

LarryK

Yoda
Gold
Country flag
Offline
Bushings and shafts are available. Look thru the vendors on this site and they can direct you to a vendor or repair shop. Sounds like the same carbs on GT6, TR6 and MG. More options!
 
OP
JPSmit

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
Rrbbeerrttoo said:
Or, just to test, can't you use the shaft coupling the two carbs for the test; it is same diameter as the shaft thru the carb bush.

Robert
66'tr4a irs
CTC53788L

great idea - thanks!
 
OP
JPSmit

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
TR3driver said:
FWIW, I've found that a little bit of wear doesn't really hurt all that much anyway. In operation, the shaft gets sucked against the housing on the vacuum side, so the leak (if any) is on the low-vacuum intake side. Makes the idle mixture a bit leaner than it would be otherwise, but since the mixture gets adjusted at idle, you can correct for that. Then the only downside is that the cruise mixture is a bit richer than it needs to be. Fuel mileage will be off, but performance about the same.

Good point, though it is pretty worn.
 
OP
JPSmit

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
LarryK said:
Bushings and shafts are available. Look thru the vendors on this site and they can direct you to a vendor or repair shop. Sounds like the same carbs on GT6, TR6 and MG. More options!

Got an email in to my Moss guy - thanks for this advice!
 

Lotuswins

Jedi Trainee
Country flag
Offline
Hi John-Peter,

I have a Europa with twin Zenith CD's, and just replaced the shafts. Note that the ZS have steel bushings, unlike SU's and other carbs. Being steel they don't wear much if any, but the shaft will. I replaced only the shafts, and seals (if yours has them) and the car now idles great and the A/F ratio is right on (I installed a meter a few years ago).

I hope your rebuild goes well.....

Jerry Rude
73 Lotus Europa TCS
67 BJ8 Healey
67 S1 Europa
 
OP
JPSmit

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
Thanks Jerry, shafts are on order, my "guy" also said I didn't need oversize. Tonight's question has to do with gaskets. When rebuilding a carb do you recommend installing the gaskets dry or with sealant?

thanks all. BTW - sure am glad already I have a couple extra carbs to scavange parts from - or figure out how it goes back together.

Cheers!
 
OP
JPSmit

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
Oh, and one more question. The carbs have the little spring loaded pin that you press to check the idle & mixture. (hope that makes sense) On the carb I took apart tonight it seemed to have a small rubber washer on it - presumably to seal it in the carb, the first carb did not have this. Does this sound familiar? should it have an O-ring or the like?
 

tdskip

Yoda
Country flag
Offline
That is the mixture testing pin. Did you check the schematics for the specific model you have John-Peter? I don't remember a gasket there or see on the Moss site. Could be wrong, so double check.
 

Lotuswins

Jedi Trainee
Country flag
Offline
On carbs, always install dry. any sealant can get into jets or other parts clogging things up.

My boy had a 912 once, and a little RTV ball got into one of the air jets. It took a long time to diagnose, and boy, could that car backfire!!

On the piston lifting rod, mine do not have them so I can't comment. Which model ZS do you have? CD, CDSE, ??

jerry
 
OP
JPSmit

JPSmit

Moderator
Staff member
Silver
Country flag
Offline
Lotuswins said:
On carbs, always install dry. any sealant can get into jets or other parts clogging things up.

My boy had a 912 once, and a little RTV ball got into one of the air jets. It took a long time to diagnose, and boy, could that car backfire!!

On the piston lifting rod, mine do not have them so I can't comment. Which model ZS do you have? CD, CDSE, ??

jerry

CD-2 (IIRC)
 
Similar threads
Thread starter Title Forum Replies Date
S Question on rebuilding Stromberg carb Triumph 24
T Stromberg 150 CD carb question Triumph 4
J TR4/4A TR4 Stromberg Carb Question ? Triumph 12
P GT6 GT6 stromberg carb question Triumph 6
K Stromberg carb question Triumph 4
J TR6 Stromberg Carb Mixture Adjustment Triumph 6
T TR6 Carb Vacuum Port- TR6 Zenith-Stromberg Carbs Triumph 4
M General MG stromberg carb MG 5
R J-H Stromberg carb connections? Where do they go? Other British Cars 2
R GT6 Carb Floats for Stromberg 150 . Triumph 5
SherpaPilot TR6 Stromberg CD 175 Carb Tuning Triumph 8
P TR6 Tr6 stromberg carb gas leak from starter valve bolt shaft Triumph 5
bighealeysource Stromberg carb help needed for TR buddy Triumph 8
H Stromberg Carb Sync and adjust Triumph 6
A XKE Series II Stromberg Carb Upgrade Jaguar 4
C Stromberg Carb 'O' ring Triumph 3
dklawson Improvising Stromberg Carb Tools Triumph 14
I TR6 69 TR6 Zenith Stromberg carb help Triumph 1
SCguy TR4/4A TR4 Stromberg Carb. adjustment Triumph 12
M Stromberg Carb Problem Triumph 5
S stromberg carb adjusting Triumph 2
Got_All_4 STROMBERG NEEDLES FOR 3 CARB SET UP Triumph 2
johnrip Zeinith-Stromberg Carb K+N Air Filters Triumph 8
S TR4/4A TR4-Stromberg throttle shaft play Triumph 3
Celtic 77 MGB 77 Stromberg issues MG 12
Tim Tucker TR4/4A Stromberg 175CD (c.1825) rich above idle Triumph 12
V MGB Zenith Stromberg and a Cat on an earlier model car? MG 22
Quackedo TR6 1969 TR6 Stromberg 175 CD-6 Triumph 0
Got_All_4 TR6 Non Adjustable Stromberg Pistons Triumph 8
H TR6 1974 tr6 stromberg 175 cd-2 choke Triumph 2
S TR6 Stromberg Bypass Valves - Question Triumph 11
T TR6 My '74 TR6 Zenith Stromberg Carbs Float Bowls Leaking Gas Triumph 11
Sarastro TR4/4A Stromberg linkage question Triumph 4
SherpaPilot TR6 Stromberg War, Finally Success Triumph 2
R TR2/3/3A Stromberg vs. SU carbs [discussion/advice] Triumph 17
D Stromberg Dash Pot Screws Jaguar 3
Merlin63Tr4 TR4/4A Cracked Zenith-Stromberg float assemblies Triumph 13
steveg Online SU and Stromberg needle database with comparison charting Austin Healey 2
bfitz Zenith Stromberg O ring question Other British Cars 8
K TR4/4A Stromberg..."coupler" that links vacuum outlet to diff vacuum line is N/A? Triumph 3
K TR4/4A Stromberg question. Triumph 13
M TR4/4A Stromberg CD175carb query Triumph 7
RickB MGB Stromberg on my 80 MGB - fast idle this morning MG 6
RickB MGB HS6 or HIF4 bolt right on in place of Stromberg? MG 6
Zimmycobra TR4/4A Zenith Stromberg questions Triumph 13
M TR4/4A Stromberg ? Triumph 4
L zenith-stromberg carbs Lotus 11
G Stromberg cd150 question Spridgets 1
TR6BobNF General Tech Midget Stromberg 150 Adjustment MG 8
Airfix Wedge TR8 Zenith Stromberg carbs slow deceleration Triumph 1

Similar threads

Top