Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
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73 Z with SU's. The water tube that goes between the front and rear E-36 intakes has a leak where it meets the rear manifold. There are hex nuts at each end of the tube. Don't know much about it so don't want to mess it up worse. Want to keep using the water tube. It's a small leak but I want to fix it before it gets worse. Temporary and/or permanent fix?
Last reply by Stanley, -
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- 10 replies
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Hi all, the car seem to run well. It's not on the road so I just run it in the driveway on the weekends as I put it back together. It should be on the road in the next week or two and I don’t like gas leaks. I put new gaskets in the carb's and cleaned them as well as I could this past winter. The car has not been on the road for 29 years but the refresh is almost complete. They dripped a little from the intake the day I got the Webers brand new in 1978 but it never stopped me then. In my old age I do not want to drive it with any gas leak. When I turn it off for the day I'm getting a slow drip of gas from the air filters. Can anyone help me locate and fix the problem?…
Last reply by 240260280z, -
- 4 replies
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Hey guys. I would like some advice on what I believe to be a Mikuni jetting or tuning issue. Sorry it’s long but here goes… The issue is as consistent as clockwork. At our local AutoX events, we do 3 runs in the morning (day 1) and 3 runs in the afternoon for (day 2). On warm or hot weather events the following occurs: 1st Run – Car runs excellent 2nd Run – Have trouble launching off idle at the starting line, once going 10+mph the car runs excellent 3rd Run – Slightly erratic idle, hard to launch, once going 10+ mph the car runs excellent Lunch Break (Cool Down) 4th Run – Car runs excellent 5th Run – Have trouble launching off idle at the starting line…
Last reply by acador, -
- 3 replies
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These were in the back of my parts car. I thought they were sss1800 flat tops, but I found a thread where Bruce Palmer referred to the sss1800 carbs as 38mm, and I measured the inlet at 36mm... Can anyone positively identify them? I can take more pictures and measurements if necessary. They were mounted to a pair of E41 intake manifolds with a N30 balance tube. It seems the previous owner intended to use them on the 240z, but I don't know if 36mm carbs could provide enough airflow to an l24 in the higher rpm range. If anyone can answer these questions or provide me with some insights as to what exactly I have and what I might be able do with them I would greatly appreciat…
Last reply by putmattaway, -
- 12 replies
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Anyone successfully use one of these for tuning the carbs? Bought a gen-tech IR on sale at Harbor Freight, tried it out a couple times. I'm running SU's on a 240 with stock exhaust manifold. I can see it would work better with headers. You can get a good shot at the first and last exhaust runners about 2 inches from the head, the 2 middle ones are obstructed by the intake so you can only take it's temp very close to the head. Noticed the front is about 100 F lower than the rear one so maybe the rear carb is lean? I know the manifold is open inside so I guess it wouldn't help to check the down pipes. How close to the manifold should I be holding the gun? Noticed it …
Last reply by Stanley, -
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I was rooting around in the old threads here in the forum and came across more than one post that said that, for the most part, you really don't need to choke Weber carbs. The entries were from a few years back and I was wondering if that is still the consensus. Also, if anyone has a '73 240z with triple Webers, I'd be interested to see how you've got the choke cable hooked-up. Thanks!
Last reply by Dr. 240Z, -
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I have 3 or 4 sets of SU carbs that I would like to sell but am missing some parts. Anyone out there have a small stash of good, used SU floats, nozzles or needles? Can buy the nozzles and needles new, but trying to find good used ones. Can't find the floats. Any ideas or thoughts?
Last reply by beermanpete, -
- 20 replies
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Are there any basic settings for the different adjustment screws? Was wondering.. since I have them of now for cleaning Bart
Last reply by Stanley, -
- 11 replies
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Does anyone have Triple weber DCOE 45? I got Weber DCOE 45 - 152 E/T F16 Main Jet 135 Air Jet 155 Idle Jet 70F9 Pump Jet 45 Needle 200 I saw a lot of folks use 40 DCOE. But seldum to see people using 45. I found one Japanese web site mention about Weber 45 DCOE with 280z, 240z setting. Weber Carburator Manual - Google Translate I wonder how useful of this setting is. I'm planning to order "power pump jet" (Garage Carry-Back) from Japan. Normal Jet Power Pump Jet Garage Carry-Back - Google Translate But I haven't decide what is the good base setting combination. I would like to exchange setting info! Thanks, tamo3
Last reply by tamo3, -
- 63 replies
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I have made the acquaintance of a guy who has been mentioned here more than a few times. Keith Franck knows an amazing amount of information about the Weber side-draft DCOE carbs, and has invented and manufactured a number of innovations. Just last weekend, he had a 'tuning day' for Lotus owners who's cars use Weber side-draft carbs. He offered to include us Datsun peeps but it was really too late to set this up. I am wondering if we have enough people who would attend a Tuning Day for us Datsun guys with Webers? I have a friend with a restoration shop who would be willing to host in Sonoma CA... (Keith lives in the Martinez area). We could have a BBQ and maybe even a dri…
Last reply by conedodger, -
- 0 replies
- 869 views
So I was working on rebuilding the SU's for a new project, and I either bought the SU's with a broken fuel nozzle (on bottom, the feed one), or broke it in storage, etc. Anyway, what is the replacement part, and procedure? I don't see a clean way to do it. Thanks! Curtis 70 240
Last reply by CEgg11, -
- 3 replies
- 1.2k views
Hey, I just need some real quick clarification on setting the high-speed balance setting for the early SU carbs. My understanding is that you set the idle airflow, bring the service screw in to 3000 RPM and then check the airflow again? Adjusting the same screws as you would at idle to maintain balance at high RPMs? I need to be efficient before I attempt it, my neighbors really don't like the noise ;P I just haven't seen it described in more detail then "First you balance your idle, then you set your high-speed balance" Thanks!
Last reply by tlorber,
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