skydivepaul
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| posted on 9/10/05 at 10:05 PM |
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Electric cut off switch
I am wanting to fit a cut off switch to my MK Indy with R1 engine, for sprints and hillclimbs next year, also adds a bit of security and makes it
easier to dis the battery when your working on it. Question is do you need the type with the diodes in for a BEC?? You need these in CEC! to stop the
engine running on when the switch is activated and also prevents alternator damage but not sure about the BEC. Has anyone fited one to a BEC for
racing? Any advice gratefully received
Cheers Paul
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
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tks
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| posted on 10/10/05 at 12:44 PM |
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wy no use an kill switch item?
if i was you i would just cut of the power to the injectors and to the coils...
thats the way the kill/run/bike angle switch works on my VFR 800 1998
TKs
The above comments are always meant to be from the above persons perspective.
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Jon Ison
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| posted on 10/10/05 at 03:04 PM |
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the answer you looking for is yes or it will run on.
Actually before i get shot down in flames i'm not 100% sure if it would run but i did it that way just in case and all is fine.
[Edited on 10/10/05 by Jon Ison]
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ChrisGamlin
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| posted on 10/10/05 at 06:28 PM |
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Im not sure if it will run on or not either, but it may well fry something because if you disconnect the battery whilst the alternator is still
spinning, there's nowhere for the charge to go and it can spike the system the same as it can in a CEC.
You dont need a switch with built in diodes but you do need a switch that has the two supplementary swtches built into it as well as the main battery
switch, one thats normally closed, the other normally open.
The way Ive done mine is to use the normally closed supplementary switch to activate the engine stop switch when the key is turned (so in an emergency
it will kill the engine anyway), and then the normally open switch kicks in a wire with a big resistor in line (cant remember the value), which then
goes to earth from the battery terminal on the engine side. When the switch is thrown this wire effectively earths the positive battery wire from the
engine side (so not connected to the battery at this time) through the resistor so any charge from the alternator is dissipated.
Hope this makes sense
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skydivepaul
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| posted on 10/10/05 at 10:07 PM |
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I think I get what you're saying Chris, many thanks.
Where would I get the said switch and do you know the name / part for it
Cheers
Paul
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
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ChrisGamlin
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| posted on 11/10/05 at 12:36 PM |
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Its one of these
This picture is from Vehicle Wiring Products but you can get them from virtually all car wiring / motorsport places like Rally Design, DT etc
Chris
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ChrisGamlin
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| posted on 11/10/05 at 12:48 PM |
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BTW, if I get time I'll draw a diargam tonight so its clearer how Ive wired it up
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skydivepaul
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| posted on 11/10/05 at 06:32 PM |
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Cheers Chris, looks like an FIA master switch I know where I can get my hands on one for about £15.00. If you get a chance to do a diagram for me that
would be much appreciated
Paul
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
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ChrisGamlin
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| posted on 11/10/05 at 07:32 PM |
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Yep, AKA FIA master switch
Here's the wiring diagram .....
 
FIA Keyswitch wiring diagram
Chris
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skydivepaul
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| posted on 11/10/05 at 08:26 PM |
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Ta very much
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
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zzrpowerd-locost
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| posted on 11/10/05 at 09:58 PM |
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on zzr1100 engine you fry the cdi if you disconect the battery with the engine running! oppppsss big bill  
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