Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
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I have a pair of Birmingham manufactured SUs on a 240 manifold. Their serial numbers are AUD 425F and AUD 425R. Any one know what they are origionally off.
Last reply by olzed, -
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- 6 replies
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hey guys i was given these carbs when i bought my 240K. The K originally had a single carb on it. Just wondering what my options are. im gathering their of a Z? are they worthy of putting on? i want to get them restored and a kit through them. has anyone got theirs restored so that their back to that golden shiny colour? do they dip them to do that? cheers terry
Last reply by tez240k, -
- 16 replies
- 2.6k views
Ok so I finally got working on my 73' 240. When I picked this car up the exhaust manifold, intake and carbs were off the car. After noticing that the previous owner snapped a stud off going to the exhaust manifold, I drilled that out and put a new stud in there, finally got everything that come with the car together and tired to fired it up no fuel. I found that the mechanical pump was not working so I had a spare 5-7 psi electric pump handy and hooked that up and bam fired up and then out of know where the throttle was stuck wide open. I quickly shut it down and then omg a fire!!! I have never ran so fast in my life to get the fire out. So I may have jumped the gun (noob…
Last reply by lady24d, -
- 2 replies
- 1.7k views
What size tubing fits the carb vent tubes? Who sells it? With no tubing on my ITG setup can I get dirt into my carbs? Thanks!
Last reply by jmark, -
- 27 replies
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I've been looking at various stub stacks for SU's and I'm wondernig if anyone here understands the function of these things enough to know which design is best. I've attached a few representative pictures of the various designs I've seen (including a longer ram jet but I'm not really too concerned about that because it's difficult to use with an aftermarket filter such as a Ramflo or K&N). But anyway I'm wondering if the circular one is best because of the overall symmetry, or if the smaller thin cast ones have some advantage because of the smaller size and shallower mounting area. Or does nothing but the curvature and length really matter? The first one is a ca…
Last reply by jmark, -
- 3 replies
- 2k views
Hi Guys, I've installed my tripple DHLA40L Carbs recently. The motor is an L28 and in need of a rebuild in the near future, perhaps 6 to 12 months away at this point so I don't want to blow a heap of money getting them professionally set up on a dyno until after the rebuild. In the mean time I thought I would get them running as well as I could. My L28 is stock with elec dizzy, headers and 2 1/4" pipe with a hot dog and turbo flow muffler. The engine idles ok atm however running extremely rich. I've been using the Des Hammill book "How to tune Webers & Dellortos". Anyhow I've attached a spread sheet I hope to build on as I fumble my way through the world of tripple ca…
Last reply by datgillie, -
- 9 replies
- 1.9k views
I was always under the assumption these were from a 72, but I am unsure if the previous owner changed them out or not. I cant really make out the stamping on the side it looks like it says HJG46 W-F3 but I am kind of guessing, especially on the W-F3 part. It has a clicky type adjuster on the bottom and not the turn style knob. 3 screw on top and the round throat.
Last reply by esmit208, -
- 5 replies
- 1.7k views
Running a 2.8 on triple Dels. Facet 2 to 4 lb. fuel pump, filter before the pump, 5/16 hose all the way to the carbs, no pressure reg, no return, Carbs were pro rebuilt . It has run hard for the past few months. Out of the blue it dies out past 3500 rpm on the freeway only. On city streets it still runs ok. I have change the pump, lines, and filter with no joy. It will not even run at 3000 rpm on the freeway. Any ideas ?
Last reply by LeonV, -
- 5 replies
- 2.5k views
No question this time, just something that may help someone some time. My gauge works, and seems at least consistent, however, the markings on the gauge don't correspond with the needle. That is, it never shows (F)ull and I remember going pretty far once when the needle had hit (E)mpty. The gauge was registering "E" so I thought it would be a good time to drain the tank and measure then resistance of the sender after adding a known quantity of gasoline to the tank. I'll be posting pictures of the gauge and resistance measures in another thread in the next day or two. My fuel pump is a generic electric "thumpa-thumpa" type installed at the tank, with a filter betwe…
Last reply by Jetaway, -
- 2 replies
- 2.9k views
Hi, I'm currently redoing all my old fuel hardlines. I was wondering what fuel line size is suitable for these two different carbs. Mikuni 44's weber 48's would stock fuel line size manage? I have a early 260z thanks
Last reply by Mike W, -
- 2 replies
- 1.6k views
Just like the title says, My newly rebuild SU's squeak. I have had my Z therapy carbs on my car for over a year now and they are quite brilliant. Lately though, I have been noticing a squeaking coming from the dashpots as they go up in the dome off idle when I blip the throttle. Is there a way to lubricate these? I did not think they needed any lubrication? But since I am chasing down a mixture issue, I wonder if my needle is not rising all the way and that could be messing with my fuel mixture. I have not had my carbs apart since they left the Z therapy labs. Never needed to mess with them. They were flawless after being tuned and balanced.
Last reply by Zedyone_kenobi, -
- 1 reply
- 1.5k views
Does anybody know who sells the Gunson Color Tune in the central valley in california?
Last reply by Gary in NJ,
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