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About jonbill

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  1. jonbill

    Car wont run triple webers

    At least you've got one working one to compare too, and a good book. On my Dellortos the problem with the accelerator pumps is always the one way valve gets gummed up if the carbs aren't used for a while and sit with fuel in them.
  2. jonbill

    Car wont run triple webers

    There might also be throttle stops per carb. This is a good book on setup. https://www.amazon.co.uk/gp/aw/d/1845849590/ref=dbs_a_w_dp_1845849590 I'd start with making sure the throttles are closed at rest and adjust the linkages so all 3 throttles start to move at the same time. Idle mixture screws I think should be a couple of full turns out from fully closed (but not sure of this, I don't have Webers). Have a look down the bore of each choke in turn as you open the throttle briskly and you should see a squirt of fuel going toward the engine. (3 pumps should be plenty for cold start even without choke, too many pumps will flood it). If the carbs are reasonably assembled and no big air leaks at manifold it really should start like that.
  3. jonbill

    Where to go with this rusthole

    The left one is for the crank case ventilation pipe (although it looks small in that photo? ) and the one on the right is the block coolant drain. It should be just plugged in normal use. (although I have see one with a secondary electric pump extracting from there)
  4. jonbill

    Home Built Z 'Full video build'

    Imperial and US ounce are the same I think. Wiki agrees https://en.m.wikipedia.org/wiki/Ounce I think we just deviate on how many ounces are in larger units like pints and gallons. An ounce is 28.3 g, so 24oz is 679.2g
  5. jonbill

    Datsun 240z engine issues

    If the colour of the plugs is OK, and it really is backfiring through the inlet, I'd suspect the ignition timing.
  6. jonbill

    installing diff/axles

    +1, they definitely have to be in the diff first, and it's much easier to do it while the diff is on the floor out of the car.
  7. jonbill

    Christmas oil

    There's an explanation of Z7 here: https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=4017 I liked it better when there was some mystery.
  8. Kameari sell larger valves. I'm sure many others do too, but I like Kameari stuff. https://www.rhdjapan.com/search/engine/nissan_fairlady-z_s30-l28-10-1971-08-1975/model/nissan_fairlady-z/car/nissan/category/cylinder-head-and-valvetrain_valves
  9. jonbill

    SU carbs will not sustain Heavy load

    I'd agree. Definitely get a decent pump, get a decent regulator and see if you've still got a problem or not. If there's still a problem, at least you'll be sure where the problem isn't.
  10. jonbill

    SU carbs will not sustain Heavy load

    I've used Holley Red and Blue pumps and I found them both ferociously loud and rather unreliable (correctly positioned at the level of the bottom of the tank). I wouldn't recommend them. I'm currently using an old quiet Bosch 4 bar diesel pump out of my BMW. I've got an Aeromotive FPR that regulates it down to 2.5 psi and I'm very happy with it. I haven't read the whole thread but I read the first post and I'd say if it's going lean almost immediately at 3k in 3rd when you apply load, I don't think it's the fuel supply, it would take a few seconds to use up the float chambers. I think your needles are too lean. Are they the ones that came with the carbs? Apologies if you've been over this.
  11. jonbill

    engine/trans help

    I use a length of box section bolted to the block to lock the flywheel:
  12. jonbill


  13. jonbill

    engine removal

    Fwiw, I always lift mine with ratchet straps round the engine rather than chains. I've got very limited height in my garage so I need to get the leveller as close to the engine as possible.
  14. Where do you even get 99 Ali? Mine is happy with 95.
  15. jonbill


    Thanks. It's very far from perfect but it gets a bit better most years.

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