November 6th, 2012, 10:31 PM | #2 |
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Snazzy.
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November 6th, 2012, 10:57 PM | #3 |
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Notice any difference performance wise?
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November 15th, 2012, 06:20 PM | #4 |
wat
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none what-so-ever; as it should be. the difference is merely in how much space the coils take up... this way, they dont take up any extra space. it's kinda more of a farkle for engineers i guess... not really any benefit outside of saving a few ounces and the space (and how it looks)
although i did blow up my engine at the track a few weeks after putting them in, so maybe it was related :P :P
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November 15th, 2012, 07:09 PM | #5 |
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I think they look sick. I like your valve cover too. I want to paint mine black next time it's off in the spring. Plain old high temp paint? Any surface prep?
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November 15th, 2012, 09:23 PM | #6 |
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Just thought they might help with top-end if they had a higher output.
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February 7th, 2013, 10:49 AM | #7 |
RIP Alex
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What year ZX10r plugs did you use? Are the ZX6r plugs the same? Does different redlines of the two bikes affect characteristic of the plugs?
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February 7th, 2013, 11:41 AM | #8 |
wat
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its from an 05 06 zx636. it is from a CDI ecu which is a requirement for that type of coil (the 250 is also CDI, not TCI or others which will NOT work with a cdi ignition system)
the gains from this type of coil comes from the lowered resistance going from the collapsing field into the output coil and into the plug... if you look up joules law you'll see as you lower that resistance, you get higher inductance joules going through the plug for the same amount of charge current (from cdi) which means the spark is hotter and will last slightly longer. just make sure the coils are suited for the type of plugs you use otherwise you could melt a plug. (the 05 kawi 636 uses the same plugs as the 250)
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February 7th, 2013, 12:44 PM | #9 |
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Alex, post 8 was great. Thanks for the explanation.
Hotter spark that lasts longer means longer burn or more consistent burn or...? Sorry, I'm still figuring out that part. |
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February 7th, 2013, 12:59 PM | #10 |
wat
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well so if you have a weak spark, you are only igniting a part of the fuel, and then that fuel ignites the rest. if you put more joules through the plug (joules is basically heat... factor of power over time) then the spark contributes to igniting more of the fuel. if you are running very high RPM with high compression (lots of other circumstances but these effect it the most) then its possible to complete the burn cycle while still having unburnt fuel. having a hotter spark can start the combustion faster, which means you are able to get a more complete burn. more fuel burnt, more power output.
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February 7th, 2013, 01:10 PM | #11 |
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Again, thanks. That helped.
Is the difference noticeable at the top end or is it fairly minimal? I assume these aren't too pricey. |
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February 7th, 2013, 01:46 PM | #12 |
wat
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for a stock setup, the difference shouldn't be obvious as the stock coils are "good enough". but when you get into higher performance stuff like changing timing and compression, you can get larger changes. racerx has takai coils (better than zx coils) and is running much higher compression and agressive cam and ignition timing and will be doing a dyno with them at the end of the month so follow his thread for the results.
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August 27th, 2014, 09:28 PM | #13 |
RIP Alex
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Was searching up aftermarket ignition coils: http://motor.otomotifnet.com/read/20...i-Ninja-250-F1
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August 28th, 2014, 10:38 AM | #14 | |
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Quote:
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August 28th, 2014, 11:37 AM | #15 |
wat
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i think it makes very little difference in either unless you are running very aggressive timing. also, my understanding of the way the system works when i wrote that was slightly naive. i believe the most important aspect is how quickly the field is able to collapse into meaningful heat, and stay in a range that the plug is designed for. and how reliable the size of the field is so you don't over-charge the field and burn electrodes. (ie- what other influences are having an effect on the field near the coils, as well as the charge going into the coils before they collapse... so cdi is another big part of it as well as proper voltage regulation)
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August 29th, 2014, 07:55 AM | #16 |
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I like it, one less thing in the way lol.
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April 6th, 2015, 02:21 PM | #17 | |
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Found this info on the line and decided to dump this here for reference.
Quote:
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April 6th, 2015, 06:53 PM | #18 |
in your machine
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interesting I may have to put this on my list of things to do. I like the idea of eliminating the plug wire, as one less thing to go wrong
So from what I'm understanding it's a Plug-N-Play install?
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April 6th, 2015, 09:07 PM | #19 |
wat
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the connectors for the stock ninja 250 coils are those old school crimp on connectors. the zx style plugs use a little two wire connector thing... so its hard to connect the coilovers without the right connectors.
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April 7th, 2015, 09:04 AM | #20 |
in your machine
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Okay thanks, seen some on eBay, that also includes the wiring harness,
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April 7th, 2015, 10:46 AM | #21 |
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I am using the ninja 300 coils on my turbo 250, they fit very nice as well.
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April 7th, 2015, 11:41 AM | #22 |
I'm crazy,your excuse is?
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Are those compatible with the pregen/negen ignition? also what type electrical plugs do they use?
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April 7th, 2015, 03:58 PM | #23 |
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April 7th, 2015, 05:30 PM | #24 |
I'm crazy,your excuse is?
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<3
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October 30th, 2015, 04:26 PM | #25 |
in your machine
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I've done this modification, and a write-up on the subject,
https://www.ninjette.org/forums/blog.php?b=8379
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