Hi All,

It's getting quite cold this winter and my clubby is getting harder to start in the morning. I'm currently running a GT40R coil with a ballast resistor. Not taking full advantage of this setup as I'm not bypassing the resistor during cranking.

So, how does one correctly wire this bypass to feed the coil the full 12v during cranking?

I'm thinking the red-white wire between the solenoid and ignition will be 12V during cranking. Connecting the + side of the coil to the same terminal on the solenoid should bypass the resistor. When running normally however, doesn't this mean the coil is feeding ~8V to the solenoid? Is that enough to trigger the solenoid to crank the starter motor? Do I need a diode or something?

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Yes that will work, I did it on a motor a while ago, you need a blocking diode in the circuit as said.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

A diode will induce a voltage drop, best to wire a relay from the start wire switching full battery current or a wire from the output of the start solenoid to the positive coil.

Ash.

From the solenoid switching a relay I meant.

Ash.

Or just buy a GT40????

But i'm not getting the point....

Cheers, Ian

I didn't find any voltage drop when I did mine. You need to size it big enough.


@syahrr01,
I still have the diode & lead here somewhere (I think I know where), yours for postage if you want it.
I sold the 45D dizzy + electronic module on, replaced it with a Nissan Pulsar one.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

You could change the dizzy out to a higher voltage unit like at the link below. These are rated for your GT40R coil all day everyday, not just at start up.

You get the benefit of a high energy output all day everyday, and a new dizzy. Convertible Mini sells these locally in Oz.

http://www.simonbbc.com/distributors/4c ... h-powermax

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

I ditched the GT40R and the ballast resistor and fitted a MSD Blaster2 coil with a full 12 volts to it. Noticeable improvement in starting and pick up over the Bosch set up. I got it from here
http://www.ebay.com.au/itm/MSD-8202-Ign ... 23130b7cbb

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Slide
1965 Mini Van (1360)
1970 Mk2 Cooper S (1310)
1978 Rover SD1 V8 (4.6)
1996 Land Rover Discovery V8 (4.0)