• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)

GT6 New GT6

Share this page

Sounds like fuel is a moot issue just now... I'd be more concerned over what kind of sins have been committed INSIDE the engine first. Sounds as if there have been some cobbl'd up "repairs" there. May be best to do a full tear-down/rebuild to insure you KNOW what you have. Otherwise it may have compromises you won't find until it grenades itself when you're outside th' yard. :shocked:
 
DrEntropy said:
I'd be more concerned over what kind of <span style="text-decoration: underline"><span style="font-weight: bold">sins</span></span> have been committed INSIDE the engine first.
Click to expand...

My husband found 2 hornets in one of the stromberg-zenith carbs. They had already passed on, and Im not sure if any "sins" were made, since I think only the queen breeds. Not quite sure how they got in there. The other carb had varnish.

Yeah, its looking like were going to have to do a complete overhaul. But thats ok, I can clean and paint everything. One of the previous owner painted everything below the head red, including hoses and anything bolted on. Anything on the firewall was painted black. Both areas are chipping away badly.
 
Good morning! I'm actually Ummyeahok's husband, so I just joined the forum as well. We've got the Restoration Guide and have a Haynes manual on order for the GT6, but are there any online resources for rebuilding the Zenith Stromburg 150's or the 2.0 engine in general? I have to admit, this is my first carb'd car, and it seems a little like witchcraft to me. :laugh:

Also, I see two kits for the carb rebuild, one from Victoria British that's supposed to be good for '67 to '73, and one on eBay from a supplier in the UK that asks to specify whether it's the Mk1 or Mk2 because it apparently makes a difference in his kit, which makes me wonder if it's more complete. How necessary is it to replace the jets while I'm in there? I got the impression you didn't need to replace them unless they were bad, but they apparently need to be ordered seperately.

Any recommendations for sources and material?

Thanks in advance!
 
If I remember the Vic kit works for both models. It has extra gaskets and stuff in it. The other ones are most likely made just for a certain model. You have a Stromberg 175 CD something is my guess.

My guess is you have solid needles. At some point they put in a spring loaded needle that self centered better. I would replace them. They are cheap and with not knowing what has been done to the carbs it is easier to start with a fresh set.

I don't really know of any online resource for rebuilding the stromberg. There are some sites that talk about them, I just can't seem to find them right now. Do some google searches on rebuilding stromberg 175cd carbs and you will find stuff.

I know there are several books on tuning strombergs and also rebuilding engines.

Good luck.
 
I am bad sorry, I don't know what I was thinking. Your right they are cd150. Most be thinking about something else.
 
Just curious - does the bit about the self-centering sprung needle still apply? Looking in Victoria British's catalog, I think I only see the fixed needle in the Stromburg 150 GT6 page.
 
Better that they're fixed. The "springy" ones tended to wear the jet orifice to ovality. Intake pressure kept them pulled toward the back of the unit.

WELCOME to th' fun, Richter12x2!!
 
Richter12x2 said:
I have to admit, this is my first carb'd car, and it seems a little like witchcraft to me. :laugh:
Click to expand...


It's really baby-poop simple. The diaphragm is the only Voodoo bit. :wink:

The books will 'splain it. Depression (or demand) carbs port manifold vacuum to the upper side of the chamber to regulate how far the tapered needle rises {or drops) in the jet, allowing more or less fuel at a given throttle opening.

...or that's it in a nutshell.
 
Victoria splits out the carbs for the mk1 from the mk2. So yes your ok.

I just can't seem to find the site that showed how the carb worked. Maybe it was the SU I was thinking about.
 
DrEntropy said:
Richter12x2 said:
I have to admit, this is my first carb'd car, and it seems a little like witchcraft to me. :laugh:
Click to expand...

It's really baby-poop simple. The diaphragm is the only Voodoo bit. :wink:

The <span style="font-weight: bold">books</span> will 'splain it.
Click to expand...

I dunno, books on witchcraft and voodoo... ...we are a fuel injected household, born and raised. I just dont see us converting to the belief that some magic non computerized divine contraption has the ability to properly mix fuel and air. Its complete heresy!
 
mehheh. You're RIGHT!! I've been a practitioner of this dark art for DECADES. :devilgrin:

It's that CIS spider lookin' thingie on your mate's car that makes perfect SENSE. :shocked:
 
UmmYeahOk said:
Its complete heresy!
Click to expand...
Clark's Third Law states : Any sufficiently advanced technology is indistinguishable from magic.

The part that has always struck me as ironic, is that BL actually had to switch back from fuel injection to carburetors, to meet US emissions!
 
Albeit with some minor additional PLUMBING.

Clever Brits! :wink:

There will always be an England!
 
UmmYeahOk said:
...we are a fuel injected household, born and raised. I just dont see us converting to the belief that some magic non computerized divine contraption has the ability to properly mix fuel and air. Its complete heresy!
Click to expand...
Oh you kids. :wink:

I am pretty much of the opposite viewpoint, being "born and raised" on distributors with contact breaker sets, carburetors, and brakes that only did what the driver's foot wanted them to do! To me, it's the "<span style="font-weight: bold"><span style="font-style: italic">computerized</span></span> divine contraption" that terrifies me! But then I still tend to prefer records played with a needle, tube radios and -- sometimes -- phones with dials instead of buttons.... :crazyeyes:
 
Regarding the carbs - they are actually pretty easy to rebuild. Let us know when you are ready to start and we can walk you through it.
 
That's why we're HERE!! :laugh:
 
Andrew Mace said:
Oh you kids. :wink:

I am pretty much of the opposite viewpoint, being "born and raised" on distributors with contact breaker sets, carburetors, and brakes that only did what the driver's foot wanted them to do! To me, it's the "<span style="font-weight: bold"><span style="font-style: italic">computerized</span></span> divine contraption" that terrifies me! But then I still tend to prefer records played with a needle, tube radios and -- sometimes -- phones with dials instead of buttons.... :crazyeyes:
Click to expand...

I have an older friend with a '68 Camaro, and I kept teasing him about going fuel injected. He said "But what would I do with my carburetor?" I said "Hang it on a wall and tell people that's how they used to do things before they knew better?" :laugh: Little did I know I'd have a carb car soon enough.

I just can't help but think of fuel injection as sticking your straw in the bottom of your soda and sipping exactly as much as you want, and carbs as putting your straw on top of an ice cube and sucking a few drops off the surface! :laugh: I guess it works well enough for hot coffee, though. :smile:
 
Richter12x2 said:
Andrew Mace said:
Oh you kids. :wink:
I just can't help but think of fuel injection as sticking your straw in the bottom of your soda and sipping exactly as much as you want, and carbs as putting your straw on top of an ice cube and sucking a few drops off the surface! :laugh: I guess it works well enough for hot coffee, though. :smile:
Click to expand...

I am of an opposite view. With carbs, you suck as much as you want, with injection, the voodoo decides how much for you!
Click to expand...
 
Back
Top