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Old March 15th, 2010, 07:04 PM   #31
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Old March 15th, 2010, 08:10 PM   #32
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Although I think there is no HUGE difference in performance of NGK & Denso plugs, it has to be said that the iridium plug is superior.

In my case, the Densos are widely available so that's the way I went.

I'm with Throttlestop on this since I have used Densos for a long time, albiet not as long as him.

First thing you will notice with the Denso Iridiums is that the thing starts up quicker - sign of a better spark.

I've heard rumours from captured Decepticons in Guantanamo that the "allspark" is a technologically advanced Denso Iridium from Cybertron.
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Old March 16th, 2010, 07:00 PM   #33
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Quote:
Originally Posted by vinman View Post
In case anyone is interested in using something other than the NGK plugs, I just installed the Denso Iridium IU27 plugs and they work great. I did need to purchase a spark plug socket because it is a different size plug. I got a set of three (husky) from home depot, part #379 438. Unless you already have a thin wall 5/8th or 16mm socket.
Why did you need to do that? You could have used the 14mm end of the Ducati spark plug tool that came with the standard toolkit to remove the NGK plugs, then flipped the tool around to use the 16mm end to fit the Denso's.

This was covered in my spark plug thread on the "other" Ducati site:

Denso Iridiums for 1098's
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Old March 17th, 2010, 06:43 AM   #34
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plug question

im getting my microtec "set up" dyno work..I have ordered these plugs (iu-27) should i put them in before the dyno work or after as it will not make much of a difference? thoughts....
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Old March 17th, 2010, 07:11 AM   #35
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k i think i just made my decision.... im gonna order me some denso's

wait hey guys i cant find a difference in the
IU27 (5363) and the IU27A (5366) plug
both are iridium denso... whats the difference whitch do i order?
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Old March 17th, 2010, 08:23 AM   #36
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Originally Posted by Mr Jurassic View Post
k i think i just made my decision.... im gonna order me some denso's

wait hey guys i cant find a difference in the
IU27 (5363) and the IU27A (5366) plug
both are iridium denso... whats the difference whitch do i order?
I think one comes with the screw on terminal and the other without. Don't remember which, though.
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Old March 17th, 2010, 09:02 AM   #37
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k does haveing a screw terminal matter?
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Old March 18th, 2010, 01:40 AM   #38
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Originally Posted by Mr Jurassic View Post
k does haveing a screw terminal matter?
Our stock sparkplug harness is designed to use the non-screw top.


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Old March 18th, 2010, 07:39 AM   #39
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Originally Posted by anatra difettosa View Post
Anyone indexing these plugs...?
With the combustion chamber being so shallow in these new Evo heads and the plug right in the middle I doubt indexing will give any noticeable improvement.

From personal experience I have found indexing plugs is usually only a real benefit when the plug is well over to one side of the combustion chamber and being heavily washed by the intake charge. For example in a wedge head small block chev etc. I've tried indexing them all directions on Hemi style heads with central plugs (much like Ducati heads) and found no gains.
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Old March 18th, 2010, 04:37 PM   #40
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Originally Posted by ELTWIN View Post
With the combustion chamber being so shallow in these new Evo heads and the plug right in the middle I doubt indexing will give any noticeable improvement.

From personal experience I have found indexing plugs is usually only a real benefit when the plug is well over to one side of the combustion chamber and being heavily washed by the intake charge. For example in a wedge head small block chev etc. I've tried indexing them all directions on Hemi style heads with central plugs (much like Ducati heads) and found no gains.
True,good for old Chevs etc but waste of time in a decently designed chamber.
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Old March 19th, 2010, 03:21 PM   #41
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k i did alot of digging and found out that ngk makes a plug called the
cr9eix but does not have the correct terminal on top
the iu27 denso is the iridium version with the correct terminal top
also the iu27 u will have to tap the gap down a bit to match the
mar10a-j that is stock in the ducati.
the denso iu27a is equal to the the iu27 except its has the identical
terminal top to the cr9eix witch is ridged and we need the fat terminal
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Old April 29th, 2010, 04:28 PM   #42
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I've ordered the Denso IU27 for my 1098 w/ Termi Slips, Race ECU. Just FOR THE RECORD - Is this correct? What is the gap for these plugs for the Ducati 1098 in inches or mm ? Please help/Advise. Thanks fella's.
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Old April 29th, 2010, 06:12 PM   #43
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i just put the iu27's in my 1198
starts quicker... ya your right
um...gap is in owner manual
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Old April 29th, 2010, 06:26 PM   #44
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Quote:
Originally Posted by Mr Jurassic View Post
i just put the iu27's in my 1198
starts quicker... ya your right
um...gap is in owner manual

Interesting... gonna pass this on for my 7500 mile service. Gonna do it in a month or so. Thanks Mr. J!
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Old April 30th, 2010, 08:26 AM   #45
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ya.. just rember to tell your service rep... duc ngk plugs are on the up side of 60 bucks a peice.... the iu27's are around 13 at any dealership. If you dont tell him not to change ur plugs they will still charge u
you do have to slightly regap them but its micrometers... very small.
and to get the stock ones out use the tool in the lil red bag that came with the duc. flip the toold and u can use the opposite side to put in the iu27's and be careful not to over torque them. i pulled up a service manual on a 1098 and used those torque specs for my 1198 if i rember it was like 8nM or so...

Over all its cheaper... starts better and will last longer then stock cuase its iridiums.
although they burn 1 heat range hotter then stock. i have not noticed a differences in heat.
it seems to warm up quicker but i dont have any data to support that.

But for sure the starting is a hell of alot better. i used to slightly give it gas on start. no i dont have to at all. Im very pleased
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