Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
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It sure isn't from Weber or SK/OER The threads are machined into the body of the tube. Thanks, Chris
Last reply by Chickenman, -
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I just inherited a 1974 260 Z. It's been sitting for 10 years. I am trying to get it running again. When I turn on the ignition and the fuel pump starts fuel comes gushing out of the open port on the rear carburetor. I don't even know what hose should be attached to it or why fuel is spraying out. Any help would be greatly appreciated. Please see picture for open port on the right-hand side of the carburetor. Thank you very much.
Last reply by Fair240ZX, -
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I would think if I blow into the threaded end air should come out until I push the pin in, right?
Last reply by siteunseen, -
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L26 w round tops identical and new needles... jets ok... hoses to jets a bit suspect as they bent a little... pistons moved freely ... no choke cables attached during tuning .... nozzle in correct locations... linkage working fine. Initially the back carb was doing most of the work and it balanced better by adding more fuel to the front carb at the same air flow. After some exploratory work it was discovered the PO did pass the car along with a good valve adjust. The front 3 cylinders were ~ 100psi and the back ~ 150psi. A valve adjust brought all up and mostly ~170psi. After the valve adjust, it balanced better by adding more fuel to the rear carb at the same air flow?…
Last reply by 240260280z, -
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For the record, I had the opportunity to test an EMPI synchrometer against an STE synchrometer and the readings on each were different. I do not think they are calibrated well. The EMPI read higher at idle.
Last reply by John Coffey, -
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After taking some dramamine I watched the whole DVD. I quickly figured out why both my car's consoles are broken. The nozzles are stuck. Best money I've spent and my hands aren't even greasy, yet. Thanks Bruce and Steve.
Last reply by siteunseen, -
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Does everybody use these or throw them away? My rebuild kit didn't have new ones but I cleaned the old ones up and they still look squashed together. I'm thinking of putting filters before the fuel inlet on each carb and not using the old "last chance" filters. Am I making a mistake? Thanks for any replies, Cliff.
Last reply by siteunseen, -
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Hey gang, I've looked around and didn't see anyone mention this issue about four bolt dome top SU carbs that run horrible after everything else on the engine is correct. Recently bought an early 1970 Series 1 and it's been having really bad stumbling issues when you open the throttle from idle. Timing is dead on, valves are within spec, compression is good on all cylinders, cleaned up the carbs and even swapped out a few bits and pieces from a donor set of carbs. Bushings are in really good shape and there is almost no vacuum loss from the throttle shafts. After tuning the carbs way out of spec I got it running half way decent. Nearly impossible to sync the front …
Last reply by siteunseen, -
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Hi, I'd like to keep factory AC even after swapping fuel injection to triple weber. I could not find any documentation about how to. Does anyone keep factory AC with triple weber with canon intake? Thanks, tamo3
Last reply by Chickenman, -
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I just bought this beautiful car from the original owner. I need to find a mechanic to work on the carbs or preferably how to tune them myself. Any suggestions? Thanks
Last reply by Pop's Z, -
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I saw a thread awhile back by someone who built a gizmo to help with setting SU float levels. It even used an external pump to mimic fuel pressure through the float valve. If this rings a bell, please post the link - haven't been able to find it again. Thanks!
Last reply by NVZEE, -
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My friend has a 1973 240Z with smog equipment, and he decieded to get rid of it. I just wonder what is the purpose of these pipes, my -72 does not have them. One goes to heater hose that comes from manifold and other goes to exhaust manifold?? Is there any grand purpose for these items, will they affect on anything if removed? We are planning to put E41 balance tube (euro) but it seems we have to modify the throttle lever as well.. btw. what is that small pipe that attachs to brake booster outlet?
Last reply by LeonV,
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