Search results

  1. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    I ran across an excellent primer on Weber set up and tuning. The author is a Porsche down draft Weber rebuilder and tuner but DCOE's will be set up the same. See this excellent source in his part 2 section. The other sections are great too...
  2. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    If you don't have a carb synchronizer you should get one and set all 3 carbs the same flow at idle. Your F16 emulsion tubes are perfect for your cylinder displacement. Your idle jet may be lean and a 55F9 would be better. Idle mix screws shouldn't need to go out more than 2 turns. if you have to...
  3. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    Hello Tim, When I first bought my '72 with the DCOE 40's I had no experience with Weber carbs. I was amazed by all of the different circuits and jets involved. The previous owner gave up and let them run rich and poorly. Luckily there are many online sources for learning and parts. It was a long...
  4. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    Now that I've conquered my DCOE's a good friend just bought a '74 Triumph TR6. It has some severe problems with the Zenith Stromberg carburetors. Got them all apart and we're making them clean and new. First time for me rebuilding this brand of carb. I hope to get them running well on this nice TR6.
  5. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    Thanks. My red '72 is way more fun to drive now. Especially in the hard corners. I'm now a DCOE fan for life.
  6. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    Weber DCOE 40 Emulsion tube change results. My shiny new F16 E Tubes showed up and I put them in. Went out for a test lap. Nice power with 125 main jets but there is still a leanish mid zone about 3,000 rpm I didn't like. That told me I still had a progression problem. I didn't want to add or...
  7. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    Greetings Atom, funny you mentioned the plastic organizer box. I just bought one last week for my growing Weber brass collection. They do add up over time. My Weber experience is a little over 3 years. As far as Emulsion tubes go, I am learning all the important stuff. Like, their numbers are in...
  8. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    I have run several richer Idle jets and it does mask the lean hole mid range quite a bit. The problem is it makes my cruising AFR richer than 11:1 and mileage suffers. I like your Hammill book suggestion for the F16. I'm looking into those too. Thank you.
  9. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    I do have the older DCOE 40 18's that have the shorter idle mix screws. I didn't know that you could swap them out for the newer longer tapered style. That would make setting idle mixtures not so touchy. I'm glad you can run F11 Emulsion tubes with a long duration, high lift cam but also I'm...
  10. Texasroadrunner

    Triple Weber DCOE 40 Emulsion tube quest.

    I've been tuning my '72 L24 with Triple Weber DCOE 40's for some time. I have successfully used my wideband sensors to read the air fuel ratios at various loads and throttle openings. Idle mixture, Idle jets and main jets are working well. My issue is the lean zone at mid throttle. The...
  11. Texasroadrunner

    Intermittent low voltage to starter solenoid fixed

    I have read about this problem in other Z forums. I didn't have the intermittent until a few months ago. It really doesn't happen often but with a relay running the solenoid, I don't think it will happen again. Cheap and easy insurance.
  12. Texasroadrunner

    Intermittent low voltage to starter solenoid fixed

    Not really, the original circuit power to the ignition switch is still needed and used to turn on the low current draw coil in the relay. The relay just makes sure that maximum voltage from the battery is sent to the solenoid. Newer vehicles do this, but our old Datsuns didn't. It's up to us to...
  13. Texasroadrunner

    Intermittent low voltage to starter solenoid fixed

    Even though my wiring and the ignition switch have all been replaced, the entire circuit with connectors and switch can have some voltage drop. The relay gets full voltage from the battery and will send that straight to the stater solenoid making it reliably engage the starter motor. The relay...
  14. Texasroadrunner

    Intermittent low voltage to starter solenoid fixed

    For the last month or so my '72 would not turn over for two or three tries. Then it would. My wiring has all been replaced as well as the ignition switch. But sometimes there's not enough juice to fire the solenoid. Yesterday I put in a 40-amp relay and connected it directly to the battery to...
  15. Texasroadrunner

    1971 Nissan Fairlady Z432 for sale in Texas.

    I can't believe this one exists. One amazing find. https://bringatrailer.com/listing/1971-nissan-fairlady-z-432/?utm_source=dm&utm_medium=email&utm_campaign=2024-01-17
  16. Texasroadrunner

    What did you do to your Z this week?

    Never read the book, now I want to.
  17. Texasroadrunner

    What did you do to your Z this week?

    Last Friday November 3rd our car club put on a mini show for the kids at Benold middle school in Georgetown. They had read the Book "The Outsiders" and wanted to see some cars from that era. I didn't think they'd care about an import, but I was wrong. They were very interested in it, inside, out...
  18. Texasroadrunner

    What did you do to your Z this week?

    Nothing upgrade wise but I did take it up north to a car show at Horney Toad Harley Davidson Motorcycle shop in Kileen Texas. The Harley shop guys did the judging, and it was obvious that they loved American muscle cars more than imports. My shiny red '72Z car couldn't have looked better. The...
  19. Texasroadrunner

    240z running, and now it’s not….

    Good debug session and lessons learned. My only suggestion into the future is to replace the points with a Pertronix magnetic pick up. They work great and never need adjusting. Get their matching coil for the Igniter you purchase. See https://pertronixbrands.com/pages/search?query=Datsun-240Z I...
  20. Texasroadrunner

    Tune weber carbs in central Scotland

    I've tuned my DCOE 40's for over 2 years and have had great success. I learned quite a lot from sites like these two. https://240260280.com/Tech/Carbs/Weber/DCOE%20Theory%20Operation%20and%20Tuning.html explains how Webers work and all the circuits. Next see...
Top