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Pinned So what have you done to your bike today?

Discussion in 'The Pub' started by kiffsta, Nov 3, 2013.

  1. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    All the hard work is done ;) My question becomes though, are you on standalone? 'cause on the stock trigger, I don't see how this would advance it. I'd almost be better off drafting a slotted keyway timing wheel instead with the stock number of teeth though.

    Regardless, I made you one just now. It'd be trivial to turn out 21 more as long as you don't mind my hand scribed marks for timing. If anyone else needs one or two, I'm down to help the cause, but I'm not trying to A: become a business or B: butt in on sponsored vendor territory so it'd be good to know the rules there. :)



    01D0414C-9322-4335-A9D4-E6A1073F36A8.jpeg
     
    Last edited: Nov 6, 2020
  2. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

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    Moving the holes slightly forward or backward on a standard wheel would/should retard or advance the timing. I think if you draw a line from the TDC (T1/4) mark to the TDC(T2/3) mark, the crank positioning holes will just touch the line. I'll use the standard marks for timing the valves and setting them, but being able to to advance the firing should give the engine a pit more power...maybe. I've always wanted to try it, but never got around to making a wheel to do it. Interested to hear what others on here think about this modification?

    Timing.jpg
     
  3. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    Ok- you and I are five-by-five then.

    The problem with using the 36-1 on the stock setup is that the teeth don’t align perfectly with the OE ones. What I should do is make a new wheel in OEM style, but where the 3mm index holes are, make that a slot, say 5 degrees either way on both so you can dial that in. Conversely, leave them round and non adjustable, but make a set of 3 pre-indexed for 1, 2, or 3 degrees timing advance. Lemme play this weekend- I’m all ears for other peoples ideas as well!
     
  4. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    Also of note, those index holes are on slightly different arcs, they’re not on one distance from center. One falls further under the bolt head than the other.
     
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  5. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

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    Yes, I think the T1/4 and T2/3 marks go through the dead centre of the wheel and the alignment holes are to the left of that imaginary line. I don't recall how many degrees before TDC the firing (F) occurs, but I'd only ever want to advance the timing, so the alignment holes would be moved a smidge counter clockwise.

    I think your second idea "Conversely, leave them round and non adjustable, but make a set of 3 pre-indexed for 1, 2, or 3 degrees timing advance" is best for fine tuning, but your original idea "...make a new wheel in OEM style, but where the 3mm index holes are, make that a slot, say 5 degrees either way on both so you can dial that in" might be best for quick changing timing. Whatever you do will be of benefit to our Turbo ZXR project that @Murdo is working on.

    ZXR Timing.jpg
     
  6. garry55

    garry55 Active Member Premium Member

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    installed the Ducati suspension onto the V4's SRAD frame.........

    [​IMG]

    [​IMG]
     
  7. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    Holy crap, this is awesome! Im presuming you added the cross piece to the frame to hold the link, right? What's it off of? Third gen monster?
     
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  8. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    So the F mark (I was wondering what it stood for!) is 20* before TDC.

    The index holes are definitely left of the T/BDC centerline, but what I was getting at is that more importantly- they're at different distances from center- ever so slightly. They're not symmetrical (1.9 and 2.4mm from the edge of the center hole) to prevent upside down installation I guess. It'll make creating those index arcs a little tougher- I can't just draw a circle at X distance from center and cut two grooves out. That said, with the turbo though, I'm wondering if you might wanna retard it overall- trade timing for boost level maybe? Look at how all the turbo LS guys go, they might never get over 12-15* total timing. If you knock 10 degrees out and gain 2lb of boost before detonation, it might be a decent trade?

    I'm gonna finish up some meetings and training for the day, and get on drafting this up for shits and giggles- 'cause its not like I need one but this seems fun!
     
  9. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    I think you should put your project in a project thread. Nobody reads this from start to finish. :)
     
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  10. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    So this, basically (this is 2 40 degree arcs which should give +/- 10deg travel) Screen Shot 2020-11-06 at 4.09.10 PM.png . I'm waiting on more 3d filament to arrive. I'll try and print it and test fit it tomorrow.
     
  11. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

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    @GreyImport We should move this to a unique thread. @DamnitLaverty do you agree?

    The index holes are definitely left of the T/BDC centerline, but what I was getting at is that more importantly- they're at different distances from center- ever so slightly. They're not symmetrical (1.9 and 2.4mm from the edge of the center hole) to prevent upside down installation I guess. It'll make creating those index arcs a little tougher- I can't just draw a circle at X distance from center and cut two grooves out. That said, with the turbo though, I'm wondering if you might wanna retard it overall- trade timing for boost level maybe? Look at how all the turbo LS guys go, they might never get over 12-15* total timing. If you knock 10 degrees out and gain 2lb of boost before detonation, it might be a decent trade?

    Sorry, I didn't realise the alignment holes were different distances from the centre of the wheel. In that case, your design from the previous post (image below) is the right way to go. We just need something on the wheel to align it to the 'standard' position for setting valve clearances (2nd image). I'm not sure about timing for turbo applications, but I do want to run advance on my normally-aspirated drag bike, so slots works for both.

    Slots.JPG

    Standard position line.jpg
     
    Last edited: Nov 7, 2020
  12. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    So, I added an index hole a couple MM above the slot to TDC side as an index for the bolt, not a TDC indicator... like so. Im not sure we really care about a BDC mark, since they're keyed to each other. One gets you the other.

    I'ma print this in a bit- I think as it goes to account for laser cutting, I'm more inclined to cut a TDC slot in the wheel, and a couple of 1mm round windows to account for the -20 Firing window, and the stock index. I definitely don't have the ability to engrave/etch timing marks. :) Screen Shot 2020-11-06 at 7.45.47 PM.jpg
     
  13. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    This is definitely drifting into project territory, and out of 'what I did today' territory. I got no problem with a move, but if we make this happen, it's not a profit center- it's a community service once my costs are covered. :)
     
  14. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    Just make sure I get a link- this is awesome, and im not sure i'da tuned in for a SRAD thread!
     
  15. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Under the Forums section you can find all sorts of categories. One is
    Other Projects - Other Bikes (non 250's)
    Just go in there and create a new thread. Then copy your posts and place them in your new thread. You can't expect @GreyImport to do it.
    This thread is just for "Today I changed my oil" type of fun trivia.
     
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  16. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    you're not wrong... but it is Friday night, and I've been on the sauce. ;)

    As a dude who's moderated forums for what might honestly be called decades now, you're doin' it right looking out for @GreyImport though. This community is on all of us.
     
  17. Gen

    Gen Well-Known Member

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    Introducing,,,DV8,,,,
     
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  18. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78! Premium Member

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    Thats the cutest v8 that ever v8'd! what IS THAT? Who do I get that from? I want, I need, I must have!
     
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  19. Gen

    Gen Well-Known Member

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    114.JPG It has become apparent, if a herd of CBR250R's are left alone, in the dark, nekid,,strange things happen
     
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  20. Andych

    Andych Senior Member Premium Member

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    It’s time to finally change the sand blaster to a Vapour Blaster

    Some final wiring to be done for the foot pedal and air solenoid but it is getting there.

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