strange ignition question..not VW

speedster356 Plastic not Classic Racing

1,624 posts · joined Aug 2002 · 26 Apr 2003, 6:01 pm

#41506

Can you run 2 coils off one CDI unit?
I need a new ignition system for the jet bike. I need to spin the turbine up with a "leaf blower" to start it, so can I run a second coil off the leaf blower ignition (petrol 2 stroke) for the turbine ignitor at the same time?
The spark is only needed on the turbine untill it reaches self sustaining speed.
Motorbike guys might have the answers?
thanks

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Spyder-WISD 07-09-05 11.6s @ 125 MPH

Speedster-WISD Nats 05 14.4s @ 89 MPH

Jet cruiser-Coogee 22-09-05 900 deg C @ 110,000 rpm

Weaseling out of things is what separates us from the animals....................Except the Weasel.

Bizarre Moderator The artist formerly known as blue74l

12,787 posts · joined Aug 2002 · 26 Apr 2003, 8:26 pm

#41545

N.F.I.

😀

Futue te ipsum!!!

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 26 Apr 2003, 9:30 pm

#41576

yes my son

have a look at any new car common door or ford
they run six seperate coils.

Hey the bike looks a little lonely

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

bug eyed Commited Dubber

73 posts · joined Apr 2003 · 26 Apr 2003, 10:08 pm

#41605

but i did see you cruzin up clovelly road
and you (the car) looked sweet

KruizinKombi Seriously Obsessed Cyber Dubber

3,493 posts · joined Aug 2002 · 26 Apr 2003, 11:52 pm

#41635

Pete, the coil is just that - basically a primary coil of wire which sets up a magnetic field which is picked up by a secondary coil to create a spark.

Any coil will have some measure of resistance internally, so adding a second (identical) coil in series will double the circuit resistance and halve the power available to each coil - probably not a good idea.

Adding a second coil in a parallel circuit will effectively halve the total resistance and draw twice as much current. This would tend to burn out points in the old ignitions, but I'm not sure how a CDI would handle it. Best bet would probably be to add an appropriate resistor to bring the circuit's resistance back up to standard. This resistor's value would be equivalent to half the coil's (one only) internal resistance on the primary circuit (low tension).

I hope I haven't got the whole thing ass about or something. Maybe someone could confirm or correct for me?

Kruizin Kol

Tazzielittle

Former member · 27 Apr 2003, 4:11 pm

#41782

Ummm....
Still NFI.
Need more strongbows....