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240260280 last won the day on August 24

240260280 had the most liked content!

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About 240260280

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My Z Cars

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  1. Glad you are sorted. Yes that run looks nice but as you say 0.5 point leaner will be nicer.
  2. Thinking about installing an BMW M6 engine in my Z

    Great solution! Another way to skin the cat would be to cut a reverse thread into the other end to make a turnbuckle-like adjustable solution and forego the welding.
  3. Need some Francophone assistance SVP

    I can put you in touch with a bilingual Z nut who keeps after me to sell #249. He even gave me this mega photo he took of it before it came my way. He looked at it but did not know how special it was and missed the opportunity. Seems like an OK guy.
  4. Need some Francophone assistance SVP

    Verify age http://www.cbc.ca/news/canada/montreal/used-car-lien-nightmare-1.4295456
  5. Home Built Z 'Full video build'

    Datsun Music: https://www.youtube.com/watch?v=wUVQBC-0GOo What I used in video(Japanese Singer) https://www.youtube.com/watch?v=WZZzxS_SGHY
  6. Weber idle jet size help needed...

    This thread should be of interest. http://www.classiczcars.com/topic/41332-understanding-a-weber-side-draft-carburetor-through-a-fictional-supposition/ What size chokes are in your carbs?
  7. Weber idle jet size help needed...

    Fuel height is an important parameter affecting the slow the off-idle transition to the mains as well as the fuel richness when cruising on the highway. 30mm down to 27mm down are optimal for Webers. It is a critical tuning parameter. It is important to balance the fuel height with a friendly sized idle jet to get the best performance for the off-idle transition and the air/fuel ratio at cruise. The number of turns on the idle enrichment screw are not important and come after finding the best idle jet and fuel level. here is a nice blurb on fuel height: http://www.classiczcars.com/topic/44512-setting-weber-dcoe-fuel-level-with-caliper/
  8. Weber idle jet size help needed...

    What 40DCOE version do you have? The later 150/151's have finer thread and the turn out at idle is usually ~ 2 turns.
  9. All is right and good in the world again!
  10. Murphy's law. Glad the e-tubes arrived. We will have great data soon! No need to rush... snow is still far away
  11. Great. Thanks for reporting the details, it helps to rule out variables. No worries about the free-air calibration. It should be close. Still it is difficult to understand the cause of these occasional strange jumps in behaviour. Why the recent run has the rise in the middle part of the run is baffling. The larger air jet should have leaned the top end like the 238 but not as much. Maybe it is atmospherics as SweatyBetty suggested. I guess more testing is needed. It sure is iterative. Hopefully the new E tubes on the way will have different shapes with no hump in the middle. We could be simply battling an"F16"... and not the type that flies.
  12. btw are all tests run with air filters either in place or removed? A partially restrictive air filter will have a choke effect and draw more fuel so if they are in place for one run but not for another, a change in AF may occur,
  13. Very strange. The middle hump raised. No flattening occurred, Try the 165 to add more fuel. Maybe a free-air recalibration is needed too.
  14. Getting spammed by this website

    Thanks as always Mike!
  15. Very strange. I wonder if we are battling manufacturing variance? Weber used to flow test every jet before stamping with values based on flow measured (not drill bit size). I doubt modern suppliers of jets do this or even change or measure their drill bits often enough.