Performance Plug Wires
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Grand HDF Member
Joined: Sep 2017
Posts: 4,359
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From: Dubuque, IA
Performance Plug Wires
Anyone running these plug wires from Speeds Performance Plus?
Speeds Performance Plus Plug Wires Part # SPC1HC40
I'm a fan of the Taylor/Sumax 8mm Pro for their added insulation and positive lock. 350 ohms per foot but still work with Harley's ion sense. But the ones from SPP got my attention and are 40 ohms per foot yet still provide high EMI/RFI suppression.(note:not just RFI)
The high spark energy is supposedly good for 2-8hp repeatedly in their dyno testing over the stock wires. I can understand how the better spark can add performance. I remember Hillside saying they consistently get another couple HP gapping the NGKs @ .035 for a stronger spark.
My question(s) is are they as good as they claim and give any kind of performance boost and do they work with the ion sense or do you disable it? I'm not opposed to disabling it if they're a worthwhile upgrade. I've got a real good tune and it addresses any possible pinging issues due to heat without retarding the main spark tables and affecting the tune any longer than necessary for the condition to correct itself.
Also, I'm currently running the DCPR8E with my 212psi CCP and wondering if anyone is running the DCPR9E with their high compression build. If so, what's your cranking compression?
Not interested in the typical "stock is best" responses. Not without proof to back it up in the form of repeated dyno runs under identical conditions anyway. That should eliminate most of those responses. I can promise you the stock 6R12 plugs are NOT the best for a high compression build. Too hot a plug.
If you're running an HD plug 1 or 2 steps colder on the other hand, I AM interested. (Is there such a plug? Vrod plug maybe?)
Mostly just interested in plug heat range comparisons in builds with a CCP of 20 or more.
Thanks for any and all HELPFUL responses/experiences good or bad.
Speeds Performance Plus Plug Wires Part # SPC1HC40
I'm a fan of the Taylor/Sumax 8mm Pro for their added insulation and positive lock. 350 ohms per foot but still work with Harley's ion sense. But the ones from SPP got my attention and are 40 ohms per foot yet still provide high EMI/RFI suppression.(note:not just RFI)
The high spark energy is supposedly good for 2-8hp repeatedly in their dyno testing over the stock wires. I can understand how the better spark can add performance. I remember Hillside saying they consistently get another couple HP gapping the NGKs @ .035 for a stronger spark.
My question(s) is are they as good as they claim and give any kind of performance boost and do they work with the ion sense or do you disable it? I'm not opposed to disabling it if they're a worthwhile upgrade. I've got a real good tune and it addresses any possible pinging issues due to heat without retarding the main spark tables and affecting the tune any longer than necessary for the condition to correct itself.
Also, I'm currently running the DCPR8E with my 212psi CCP and wondering if anyone is running the DCPR9E with their high compression build. If so, what's your cranking compression?
Not interested in the typical "stock is best" responses. Not without proof to back it up in the form of repeated dyno runs under identical conditions anyway. That should eliminate most of those responses. I can promise you the stock 6R12 plugs are NOT the best for a high compression build. Too hot a plug.
If you're running an HD plug 1 or 2 steps colder on the other hand, I AM interested. (Is there such a plug? Vrod plug maybe?)
Mostly just interested in plug heat range comparisons in builds with a CCP of 20 or more.
Thanks for any and all HELPFUL responses/experiences good or bad.
Last edited by 60Gunner; Jun 19, 2022 at 12:14 PM.
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,809
Likes: 7,446
From: OH
Anyone running these plug wires from Speeds Performance Plus?
Speeds Performance Plus Plug Wires Part # SPC1HC40
I'm a fan of the Taylor/Sumax 8mm Pro for their added insulation and positive lock.
The high spark energy is supposedly good for 2-8hp repeatedly in their dyno testing over the stock wires.
Not interested in the typical "stock is best" responses. Not without proof to back it up in the form of repeated dyno runs under identical conditions anyway.
Speeds Performance Plus Plug Wires Part # SPC1HC40
I'm a fan of the Taylor/Sumax 8mm Pro for their added insulation and positive lock.
The high spark energy is supposedly good for 2-8hp repeatedly in their dyno testing over the stock wires.
Not interested in the typical "stock is best" responses. Not without proof to back it up in the form of repeated dyno runs under identical conditions anyway.
Road Master
Joined: Mar 2013
Posts: 817
Likes: 380
From: Central Ohio
Taylor makes a 10mm wire, I've seen them listed on Summit before. Not sure on specs vs the 8mm as I can't find anything in the motorcycle section on their website besides 8mm
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