Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
Subforums
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1,454 topics in this forum
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I've been looking for a good throttle cable kit for my 73 240Z with SU's, but couldn't find any. I heard MSA had one, but no luck finding any links or info. There's an ArizonaZCar instructions link I kept seeing, but link is broken. So, seeing nothing available, I decided to build my own. Actually, I put together a few kits (9 more left) thinking maybe others might also be interested. You provide the cable kit, but you decide if you want to spend more for a Lokar cable, or a cheaper $20 Amazon knockoff. The design objectives were: Use of readily available 24" universal throttle cable kit (you provide). No junkyard rummaging needed. No weld…
Last reply by KenFirch, -
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AB Valve Question 1 2 3
by Richie G- 3 followers
- 27 replies
- 537 views
Working my way through the engine bay and starting to take apart and get ready for some work replacing the mess of hoses left by PO. I took the AB valve and corresponding hose off and a bunch of what i would say looks like petrified carbon fell out. Some of it is typical dust and small particles but a few are large and pretty "square" so I'm wondering if this is some sort of broken diaphragm, or gasket or something in there? Or is it just carbon that formed this way? Last i had the car running about 6 months ago I don't recall any backfire, how would I know if this valve is still good? Or is there a way to disassemble and clean it? BTW search seems to be down so…
Last reply by Richie G, -
- 9 followers
- 150 replies
- 24.2k views
I'm getting ready to put the motor back in after a YEAR!! My dumb a** thought it would be a few months. Anyway, I'm getting the fuel supply worked out. Drained the year old gas from the tank, flushed the carbs then checked the float levels with clear tubing. Question? They're mounted level on a wall and the rear has a taller float valve (actually doubled up washers) so could you all look at my pictures and tell me what you think? The front is a little short but I think that may be because of the way they're mounted, level. I cut out the rotten fuel line under the battery too. Found a small pin hole. That stuff looks like zinc plated cop…
Last reply by Captain Obvious, -
- 6 followers
- 37 replies
- 2.3k views
I thought you guys would to see what my friend is doing to put bearings in the su bodies for the throttle shafts.First he made a fixture to hold body in a machine block on a mill
Last reply by Captain Obvious, -
- 3 followers
- 49 replies
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I am now going to attempt to take off the old non working flat top SU carbs and put in the round top SU carbs can someone please tell me which lines must stay and which lines can go and/or is there a step-by-step instruction on how to do this I have not seen any any videos on the swap or any step-by-step instructions on the swap. I need to buy any extra parts or can this be done with what is there between the two sets of carbs? I have another manifold that goes with a round top carbs. Do I just takeoff the manifold that’s on there now and put on the round top carbs on the manifold that I have with them or do I just take the carburetters off and put them on the existing m…
Last reply by Zed Head, -
- 3 followers
- 12 replies
- 346 views
Can someone tell me if these flat tops have an easy to access bone desolate screw? I just want to drain the bowl.
Last reply by Captain Obvious, -
carb oil leak 1 2
by kully 560- 3 followers
- 18 replies
- 769 views
I need a little help from the forum again, I have 1971 4 bolt su carbs that seems to have a small oil leakage from the mixture nut. not bad but when I adjust the mixture my fingers get wet with oil. is there a o-ring in there I can change? also can it be done with the carbs still in the manifold buy removing the assembly from the bottom of the carbs? thanks
Last reply by kully 560, -
Ever since I bought these new webers nothing has worked quite right. I am starting from scratch. Again. want to get my float squared away before I touch another dang think. Where are my Weber heads.
Last reply by Zedyone_kenobi, -
- 3 followers
- 7 replies
- 551 views
This is a first. I've probably rebuilt 60-80 Z SU carbs over the years, but have never seen this modification. These pistons were in a set of early, 4 screw carbs from a customer's 1970 240Z. As you can see in the pictures it appears someone drilled and inserted a short piece of steel rod into the bottom of each piston. The end protrudes below the bottom of the piston raising the piston perhaps 1/32" off the bridge. The net effect would richen the mixture significantly, similar to dropping the needle from the piston. The piece is small enough that I wouldn't think the extra weight would impact throttle tip in but I can't be sure. Anybody else seen this modification before…
Last reply by Mark Maras, -
- 3 followers
- 21 replies
- 997 views
I'm working through some stalling issues on my 71'. The fuel level in my fuel filter varies from about the halfway level in the filter to about 1/2" from the bottom. Does anyone know if the varying fuel levels in the filter are typical for this car? I'm running an original mechanical pump and it's pumping out the fuel just fine. Just going through the process of elimination and this seemed kind of strange. Thanks!
Last reply by Zpenman, -
- 5 followers
- 191 replies
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Installed my 40 DCOE webers on the L24: Engine specifications 2.4 liters original motor/head/cam. Pertronix ignition Pertronix 1.5 Ohm coil MSA 6-2-1 headers adjusted idle mixture screws 1/2 turn out Adjusted all idle speed screws (without actuator rods hooked up) until they were about to uncover the first progression hole I had at my disposal, an wideband O2 gage installed into my header (innovative LM1) and a Air Sychronizer tool with weber air horn adapter (note, air horn adapter not shown) My factory out of the box settings for my 40 DCOE 151's were: 30mm venturi 130 main Fuel Jet 170 Air corrector F11 Emulsion tube 55F9 idle/slow running mixture …
Last reply by Zedyone_kenobi, -
- 2 followers
- 10 replies
- 1k views
I have a question about intake manifolds, I was just thinking for a winter project. I have a stock 280zx motor with a header and 4 bolt su carbs. so right now, I have the e46 intake manifold on the motor and the car runs great. but I heard some place years ago that the n36 has better flow. has anybody made the swap, is it worth the hassle. and if so, do I use the 71 carb thick insulator or the 260z thin insulator from the n36 intake. thanks again kully
Last reply by kully 560,
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