[Diy_efi] CDI Ignition cut
Doug Allison
powerjet at iafrica.com
Mon Aug 22 08:03:01 UTC 2005
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I do hill climbing with a modified 500cc 2-stroke bike.
Traction is a problem ! I'm looking at making a traction
control set-up by cutting the ignition.
I begun by delaying the pulse from the magneto pick-up
by up to 40 deg. which effectively retards the timing.=20
This works quiet well because you have a variable=20
power output. However, if the retard is applied too fast,
the bike will back-fire, and then it takes +- 5 engine revs.
before it starts firing again ??
Initially I wanted to cut on the primary side of the coil,
but with CDI ignition there is around 600V there !!!!
Any suggestions / help would be much appreciated.
Many Thanks,
Doug =20
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<DIV><FONT face=3DArial size=3D2>I do hill climbing with a modified =
500cc 2-stroke=20
bike.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Traction is a problem ! I'm looking at =
making a=20
traction</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>control set-up by cutting the=20
ignition.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I begun by delaying the pulse from the =
magneto=20
pick-up</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>by up to 40 deg. </FONT><FONT =
face=3DArial=20
size=3D2>which effectively retards the timing. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>This works quiet well </FONT><FONT =
face=3DArial=20
size=3D2>because you have a variable </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>power output. However, if the retard is =
applied </FONT><FONT face=3DArial size=3D2>too fast,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the bike will back-fire, and then it =
takes +- 5=20
engine revs.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>before it starts firing again =
??</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Initially I wanted to cut on the =
primary side of=20
the coil,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>but with CDI ignition there is around =
600V there=20
!!!!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Any suggestions / help would be much=20
appreciated.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Many Thanks,</FONT></DIV>
<DIV><FONT face=3DArial =
size=3D2>Doug </FONT> </DIV></BODY></HTML>
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