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Offline Dion

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Spark plugs
« on: October 08, 2013, 12:27:37 pm »
Gents, what plugs do you recommend for a 836 sohc - with Cr29 carbs? It will be used for historic racing.
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Offline Doctor_D

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Re: Spark plugs
« Reply #1 on: October 08, 2013, 04:57:02 pm »
Denso iridiums, IX27, made the most power in my 836.
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Online scottly

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Re: Spark plugs
« Reply #2 on: October 08, 2013, 07:00:40 pm »
David, do you have a back-to-back dyno test with no changes other than the standard NGK plugs for the Densos?
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Offline Doctor_D

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Re: Spark plugs
« Reply #3 on: October 08, 2013, 07:54:04 pm »
Quote from: scottly on October 08, 2013, 07:00:40 pm
David, do you have a back-to-back dyno test with no changes other than the standard NGK plugs for the Densos?

Yes, and I have different heat ranges. Ix24 vs IX27.  Want to try the IX24b extended tip at some point... but there's only so much time.
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Take care,
David
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1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Online scottly

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Re: Spark plugs
« Reply #4 on: October 08, 2013, 09:19:24 pm »
Please post the graphs you already have. (Dynos are cool! 8) 8))
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Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline Doctor_D

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Re: Spark plugs
« Reply #5 on: October 08, 2013, 11:08:43 pm »
Quote from: scottly on October 08, 2013, 09:19:24 pm
Please post the graphs you already have. (Dynos are cool! 8) 8))

Happy to.  I'll download the  data from the shop's dynojet this weekend.
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Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline PeWe

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Re: Spark plugs
« Reply #6 on: October 09, 2013, 04:07:18 am »
Quote from: Doctor_D on October 08, 2013, 04:57:02 pm
Denso iridiums, IX27, made the most power in my 836.

-What about NGK Iridiums? DR8EIX (6681)
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Offline trueblue

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Re: Spark plugs
« Reply #7 on: October 09, 2013, 04:37:50 am »
Quote from: Doctor_D on October 08, 2013, 11:08:43 pm
Quote from: scottly on October 08, 2013, 09:19:24 pm
Please post the graphs you already have. (Dynos are cool! 8) 8))

Happy to.  I'll download the  data from the shop's dynojet this weekend.
I'm interested ;D
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