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Author Topic: need quick response coil  (Read 593 times)

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Offline neilc

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need quick response coil
« on: January 31, 2014, 10:22:09 AM »
On my way to pic up a used set of 1982 900 f coils will they work okay on my 72 750  points system
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Offline iron_worker

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Re: need quick response coil
« Reply #1 on: January 31, 2014, 10:37:21 AM »
http://forums.sohc4.net/index.php?topic=21425.0

Here is a thread I found about putting 900F coils into a 550. Hondaman seems to think it will work but it will work your charging system harder and will also wear your points out faster due to larger draw.

IW
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Offline BobbyR

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Re: need quick response coil
« Reply #2 on: January 31, 2014, 11:52:19 AM »
It is a common Mod since the 900 coils had removable ignition wires.
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Offline neilc

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Re: need quick response coil
« Reply #3 on: January 31, 2014, 11:55:26 AM »
Said f&%# it and am going with stock coils and drill out the wires to add longer length wires
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Offline Deltarider

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Re: need quick response coil
« Reply #4 on: January 31, 2014, 12:03:25 PM »
Yes, the 900 coils will work but best with an extra 1,5 Ohm ballastresistor, so the draw is limited and your points will not burn. It's an old trick. For instance: for cars Bosch had the normal coil (blue) coil and the socalled supercoil (red) which was 3 Ohms with an extra (switchable) ballastresistor added.
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Offline neilc

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Re: need quick response coil
« Reply #5 on: January 31, 2014, 01:09:27 PM »
lost me on the ballisresistor,what is it and where do you get it and how to wire it in
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Offline 74750k4

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Re: need quick response coil
« Reply #6 on: January 31, 2014, 01:23:35 PM »
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Offline Deltarider

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Re: need quick response coil
« Reply #7 on: January 31, 2014, 01:25:13 PM »
Hondaman has them. For some reason he offers them as a pack. Doesn't cost much.
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Offline 74750k4

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Re: need quick response coil
« Reply #8 on: January 31, 2014, 01:29:33 PM »


    $4.34 each
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Offline 74750k4

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Re: need quick response coil
« Reply #9 on: January 31, 2014, 01:40:19 PM »
But this seems like a good deal too...

the resistors, wires attached with connectors, and an aluminum heatsink!!! all for $19.00

http://sohc4shop.com/catalog/product_info.php?manufacturers_id=12&products_id=44&osCsid=1ac3160a74269a7058eda974b89a890b




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Offline 74750k4

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Re: need quick response coil
« Reply #10 on: January 31, 2014, 01:43:26 PM »
Plus those are 25 watt Dale resistors. Probably overkill, but worth the price for sure.
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