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RANDOM TIMING QUESTION

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stirlinggaz
World Chat Champion



Joined: 22 Jul 2007
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PostPosted: 18:26 - 27 Jul 2009    Post subject: RANDOM TIMING QUESTION Reply with quote
Hi all,
i have a cdi in my hand. (thanks to another thread)
& it looks like someone has modified/bodged it.
the casing has been cut & protruding from the cut bit,surrounded by sealant is a tiny little adjusting screw & next to it, etched into the plastic is "clockwise-advance"
im presuming this is in relation to the timing.
but what effect would it have, to have it adjustable?
& why?
cheers,
GAZ
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Burnzy1989
Nitrous Nuisance



Joined: 06 Apr 2009
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PostPosted: 18:41 - 27 Jul 2009    Post subject: Re: RANDOM TIMING QUESTION Reply with quote
stirlinggaz wrote:
Hi all,
i have a cdi in my hand. (thanks to another thread)
& it looks like someone has modified/bodged it.
the casing has been cut & protruding from the cut bit,surrounded by sealant is a tiny little adjusting screw & next to it, etched into the plastic is "clockwise-advance"
im presuming this is in relation to the timing.
but what effect would it have, to have it adjustable?
& why?
cheers,
GAZ


It could be possible that it is used to control a variable resistor which might adjust the ignition timing or control power to something .
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stirlinggaz
World Chat Champion



Joined: 22 Jul 2007
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PostPosted: 19:17 - 27 Jul 2009    Post subject: Reply with quote
hi,
yes, its the little plastic adjusters you see on variable resistors & im presuming it controls/adjusts the timing, but what would be the advantage to that?
would there be any advantage?
would there be any point?
cheers,
GAZ
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Blue_SV650S
World Chat Champion



Joined: 27 Nov 2008
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PostPosted: 20:35 - 27 Jul 2009    Post subject: Reply with quote
stirlinggaz wrote:
hi,
yes, its the little plastic adjusters you see on variable resistors & im presuming it controls/adjusts the timing, but what would be the advantage to that?
would there be any advantage?
would there be any point?
cheers,
GAZ


Sounds like it - someone is Cool

Broadly speaking, the more advanced the timing, the more power the bike will have. If you go too far mind you, you can cause the motor to go pop (consider making the full force of the BANG as the piston is still on its way up - that isn't going to end well is it!! Wink).

Why have they made it adjustable? Coz they could?? Thinking

Perhaps they were experimenting with different grade fuels or 'squish'. The 'octane' in fuel helps reduce the onset of pre-ignition (igniting too early and forcing the piston back) so in theory, you can run a more advanced ignition with say 102 octane fuel than with say 92 octane. He might have been trying to get the benefits of higher octane fuel. Most bikes will be set up for say 92RON (octane) so you can get more power without damaging the engine by lobbing in 102RON and advancing the ignition ... the trick is to know/judge how far!! Wink

I guess he advanced it as far as he could before getting the signs of 'pinking' Thumbs Up

in short, don't randomly twiddle, you might end up with ignition that was too far advanced and it go pop!! Shocked
____________________
The purpose of life is to fight maturity.
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Burnzy1989
Nitrous Nuisance



Joined: 06 Apr 2009
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PostPosted: 11:22 - 28 Jul 2009    Post subject: Reply with quote
What bike is it off ?
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stirlinggaz
World Chat Champion



Joined: 22 Jul 2007
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PostPosted: 18:06 - 28 Jul 2009    Post subject: Reply with quote
Burnzy1989 wrote:
What bike is it off ?

f*cked if i know, lol
found it in my big tub of random leccy bits.
think its of a small suzuki 2 stroke,
cheers,
GAZ
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Old Thread Alert!

The last post was made 17 years, 50 days ago. Instead of replying here, would creating a new thread be more useful?
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