Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
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it was running amazing yesterday then i adjusted the points to 0.18mm and started it up set the timing and purrfect then i am standing there after drining it home and it dies like i shut the key off now i have spark and fuel but no start?
Last reply by theblackpearl, -
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- 8 replies
- 9.3k views
I am considering going electric on the restoration as I will otherwise have to drill out the N47 head to allow the clacker arm to enter the head. (At least the stud holes for mounting the pump are there and they are threaded). So rather than do this, I am considering the following: 1. Fuel Pump Relay controlled by 12V signal from a pressure switch on the oil sensor 2. Fuse and 12V lead to pump motor via the relay 3. Maybe a cut-off switch to the relay control for security. Any recommendations? Is 280zx oil pressure sender/switch same thread as on l24 block?
Last reply by 240260280z, -
- 9 replies
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I'm new to this forum, and looking for some help. I have a '69 roadster 2000 with SU carbs (rebuilt about 7 years ago). They were working fine until the other day. When I first start the car, the idle is fine, around 800 rpm. After driving for several miles, the idle moves up to 2000 rpm. After driving further, it is up to 3000 rpm. It is not a linkage problem, and I cannot lower it by manually operating the throttle. Everything looks clean, and I haven't found a vacuum leak. Dash pot oil looks OK. The next time I drive the car, the process repeats. Any ideas?
Last reply by Captain Obvious, -
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so i have a 78 280z with 72 su's on it and i was wondering if anyone has ever had a river of gas going down their block while trying to start their car does anyone know what the bottom intake bolts look like cause im so close to finally getting her started but there are no bolts on the bottom of my intake so its not getting enough gas to the head......... OH and my front carb is pooling with gas and sometimes dripping out the front..... idle adjustment too high???
Last reply by theblackpearl, -
- 3 replies
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Running a 2.8 mild cam, headers, and 40mm, I just opened up the chokes from 30 to 32 and it seems to be better than before. Just need to know if 32 is about right or do I need to open them up to 34 or 36. I only have one set so if I go to big I have to start looking to for new ones.
Last reply by Carl Beck, -
- 11 replies
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I am trying to install a choke cable on my 73 because it didn't have one installed when I bought it. I took the cable off of my 71 and thought I would install it on the 73. Then realizing the hole that the cable goes through on the 71 isn't there on my 73. Sooo..... My question is: A) Is the 71 and 73 cables different Do I have to cut a hole in the 73 to make it work. (Doesn't sound right) C) The picture with the arrow is the choke cable hole (below the CMC) and I need to find one that will work for my 73. Because it would need to be longer because the position of the hole. :stupid: I hope this makes sense and any help would be appreciated as always.
Last reply by jackneuf, -
- 10 replies
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LOLNot a laughing matter folks I have a 260Z that slurps carb dampner oil I add everday. I have tried ATF, Marvel 3in1 and motor oils. At times she will idle smooth and steady and then she will shudder and pop from the exhaust Maybe I will pull the plugs and take a look even though I just did that a day or so ago. Are there supposed to be O ring seals on the caps of these carbs or just flush to the domes? They both seem to respond to adjustments and have power. Back to square one.
Last reply by Bruce Palmer, -
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I have a 71 240z I just picked up, I was going through the carbs and I noticed that the front is a 3 bolt and the rear is a 4 bolt. I also noticed that the choke on the back one doesnt pull down. Is having the different carbs going to affect anything on the way the car runs?
Last reply by SteveJ, -
- 10 replies
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Which is the most practical air filter for 42DCOE's on a 2.8L 240Z? 1. Individual K&N Filters (already have these so it's the easiest for me ... just need to get a heat shield) 2. Air horn socks / covers. These appear to be simple metal mesh filters. Honestly these look 'cool' and would really show off the air horns. 3. Single large air filter assembly with integrated heat shield (about $200 + cost of air filter ... likely $300 total). 4. Other exotic 'cold air boxes', carbon filter, etc. These seems to be more applicable to racing than something for the street. I'm currently leaning towards the K&N, but that leaves me with a need for a decent heat shield o…
Last reply by Lazeum, -
- 3 replies
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Any of you use one of those inline circular fuel pressure regulators with the rotary pressure adjustment? I used to use one... ...years back I installed an electric fuel pump and this type of fuel pressure regulator to feed dual Webers on my 4/71. Just recently while troubleshooting my car, the regulator failed, causing massive leaking. I think there is some diaphragm arrangement under the cap. Since the car has been sitting for some time, I'm having issues with rubber fitting failures. This was not a subtle leak...the pressure from the fuel hitting the cap caused a spray that covered most of the right (battery, alternator) side of the engine compartment. I was tryi…
Last reply by 5thhorsemann, -
- 4 replies
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Trying to find a low pressure quiet reliable fuel pump for a 240z resto however; not much out there that is quiet. I was thinking that maybe lowering the pressure of a 280z FI pump may be do-able: - remove some of the cylinders in the impeller to reduce flow (item 2 below) - lower relief valve pressure (item 3 below) These mods and a good low pressure FPR up by the carb may be suitable, reliable and quiet. Any input before Count Dracula and I go down to the lab...Fun Time.
Last reply by FastWoman, -
- 14 replies
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Hello classic z. New to this forum but have been a member of hybridz for awhile. I have a 75 280z that I have been piecing together over a couple years. Long story short, I am running dual webers on a 260 motor. I need to see all the pictures you have of what is the bare minimum in the bay. I have so many wiring harnesses for z's idk what goes where. Here are a couple of older pics of the car. It has came a little bit farther since. I LOVE feedback and opinions, especially on the one of stuff ive done to the car (front bumper from a cobra r mustang). I will really try and get some newer pictures soon. I will also try to get it lowered asap!!!
Last reply by 240260280z,
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