Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
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73 Datsun 240Z with a 5-speed manual transmission looking for help. The ignition system ... I have a offset slotted distributor with dual contact breakers. The distributor can only be placed into the engine one way. The contact breakers are set to the correct dwell angel but I was curious as to the timing. When the No 1 cylinder is at TDC and the ignition timing marks on the crankshaft pulley line up with the zero degree mark on the engine front cover the rotor head is not pointing to the number 1 position ... it points to the number 6 plug. Is this correct? The carbureator ... I have dual Hitachi HMB46W (flat top) carbureators. I've been having a real problem getting the…
Last reply by beandip, -
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Hey All, This isnt really a question so much as an observation. I have the Weber dgv conversion on my '73 240Z. After a few months of research, I thought I finally unserstood them enough to begin trying to tune them. I had done everything short of a complete rebuild and I still couldnt get the car to run quite right. There was a flat or dead spot at 3500-4500 rpm where the car seemed like it was going to die and then it would " come back to life" and open up. I always figured it was because they were progressive carbs and thats the way they are (this is my first carb'd car by the way). The other problem was the car would loose power at 5500 RPM and you could not ac…
Last reply by Bleach, -
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hello to anyone listening...i have just bought my first 240Z....very sexy example in orange (1973) with Samuri adapted engine etc.....sounds fantastic when booted....problemis I picked it up in Carlysle last night and it ran out of petrol (or at least that what I think happenned)....was coughing and spluttering and fuel filter was gunged up...nice man from AA couldn't get it going so got home ignominiously in his lorry.... question is does anyonr know of a company in the Oxford/Coventry area who can clean my carbs? and check it over (tune it)....car only has 68K on clock and is virtually mint so this little hick up is merely annoying.....I can't pose over the bank holida…
Last reply by frank13, -
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Hi all, Well the time has come for me to make a decision on whether to get Triple Webers or Mikuni's?? Any thoughts on performance one versus the other, using a mild cam & headers and other minor performance upgrades. Anyones experience would be helpful! Thanks, Paul
Last reply by 26th-Z, -
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Does such a thing exist? I have the PHH Service Manual (like, 20 pages) and it has some basic info and blow-ups, but is there somewhere a really good tuning and adjustment and explaination document? I have been forced to educate myself because the incompetency of others is greater than the depth of my pocket-book. steve
Last reply by Zvoiture, -
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I was browsing one of the Japanese z site which pics showing Japanese style intake induction system. Link below http://www5a.biglobe.ne.jp/~satotats/zhp/z18p/index.htm I made my own cold intake system for my weber couple weeks ago. I should known this site. Ohh, well I can re-do the thing. Also this site includes many Japanese style mods: engine, body, wireing, but its language is Japanese. Ha Oh, his 240z is 12.7sec(0-400) with his mods. jaynez31 just like 240z, I'm from Japan too, what's heck.
Last reply by philUK, -
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I own a European Spec 260z registered in 1978, and i am trying to return it to its original spec. Does anyone know if a EGR system and crossover bar was included with the european spec 260z in 1978, or was this just in the US inorder to meet the emission laws? Thanks For looking
Last reply by Zedrally, -
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I've listened to everyone's advice and plan to change out the square tops on my '73 for round tops. I've gotten a set of round tops from E-bay, but I've got a few questions: - I've got 4 screw round tops that appear to be in good shape. However, the knurled brass screw that goes ito the bottom of the carbs are missing. I'll check with the guy who sold them to me, but I'm not holding out for a favorable response. Can any type of proper bolt be put in place? Don't know exactly what the intention of this brass knurled knob is. - The float bowls have the fuel inlet that's cocked at an angle, but what's the other fitting, just an overflow, and is that to be piped back int…
Last reply by Driftin Jon, -
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Hi, i just bought 73' 240z week ago, an di know the flat tops in that cars suks, but how do i know if the past owner change them to round or weber, or wathever?? how can i know?? ooo an other question, below my vin it says that it weights 2820 pounds!! i thought 240z s were like aboutt 2300 or alot lighter? well thx a lot guys
Last reply by sblake01, -
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I finally got to the point of my re-build on my 71 240z that I have purchased new exaust system and bought a carb rebuild kit from Ztherapy. The first thing they say about cleaning your carbs is "DO NOT put them in a bucket of cleaner" Well when I bought this car it did not run and I changed plugs, points, filters, and all the normal stuff to try to get the thing to run. Well one of the first things I did was stick those old dirty looking carbs in a bucket of cleaner. I'm sure all the parts Ztherapy said would disolve have. Has anyone else ever done this? What do I need to do? where can I get the replacement parts which I have ruined. I will of course call ZTherapy toda…
Last reply by mdixon, -
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Just wanted to say THANK YOU to Craig for stopping by this afternoon and doing me the huge favor of settig up my new (been sitting in my parts bin for over 2 years) ZTherapy carbs. The major flat spot at 4000 RPM that I've been experiencing since my engine rebuild has been eliminated with the installation and set up of the shiney new carbs. A little more tweaking on the ignition timing, and clutch adjustment and I'll be jamming. Thanks again Craig for helping me so much. If I can return the favor in any way, just let me know. I wish we could have chatted more. Never did get to check out under your hood. Carl
Last reply by Bambikiller240, -
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Hi, I am looking at a 73 240z that has a cartech manifold and cast aluminum air breather with a 4 barrel holley carb. Does anybody have any information on this set-up?
Last reply by BillD,
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