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post #11 of 30 (permalink) Old 01-31-2012, 12:50 PM
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Quote:
Originally Posted by capttxrngr View Post
Looking for Iridium plugs for 2007 FLHT. What do you carry?
NGK DCPR7E is the standard nickel

NGK DCPR7EIX is the single iridium version

Pulstar HE-1i is a new favorite. Made especially for Harley, owners have been very happy with the results. We've had such good results with the product we offer a 100% money back guarantee.
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post #12 of 30 (permalink) Old 01-31-2012, 02:08 PM
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How about a quick run down on what we will gain or lose by running different plugs?

Welcome to the forum from north Texas!!

What cha got for a '07 FLSTN??

"don't wish it were easier, wish you were better'
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post #13 of 30 (permalink) Old 02-01-2012, 01:37 PM
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Originally Posted by pipewizard View Post
How about a quick run down on what we will gain or lose by running different plugs?

Welcome to the forum from north Texas!!

What cha got for a '07 FLSTN??
FLSTN will take the same plugs.

Most of the 1000cc+, late 90s+ models take the DCPR7EIX/HE-1i plug.
Only real exception to that is the V-Rod and V-2. Then everything else pre 90s and with a smaller engine takes a different plug

As far as the benefits of various plugs - we can talk all day about the science behind various features and technology - but we all know it means nothing without proving ground.

If there's a forum member who would like to test out various plugs and report back for the benefit of the community - we'd be happy to supply the product!
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post #14 of 30 (permalink) Old 02-01-2012, 01:57 PM
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Not looking for a hand out, but I would like to try some different plugs just to see how different they perform.

"don't wish it were easier, wish you were better'
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post #15 of 30 (permalink) Old 02-01-2012, 05:39 PM
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Not looking for a hand out, but I would like to try some different plugs just to see how different they perform.
Sweet. We'd be looking for a well-respected forum member who'd be willing to test various plugs systematically and report back on gas mileage, perceived throttle response and acceleration. Dyno results would be a bonus, if access is available.
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post #16 of 30 (permalink) Old 02-01-2012, 07:01 PM
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Originally Posted by sparkplugs.com View Post
Sweet. We'd be looking for a well-respected forum member who'd be willing to test various plugs systematically and report back on gas mileage, perceived throttle response and acceleration. Dyno results would be a bonus, if access is available.
Well crap, that leaves ME out!! I could recommend a couple with more knowledge and less attitude!!

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post #17 of 30 (permalink) Old 02-03-2012, 03:11 PM
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Well crap, that leaves ME out!! I could recommend a couple with more knowledge and less attitude!!
We're happy to work with whoever the community nominates!
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post #18 of 30 (permalink) Old 02-03-2012, 04:02 PM
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Iridium is six times harder than platinum and withstands temperatures in excess of 4000 degrees. Platinum will withstand temperatures in excess of 3000 degrees. The electrodes on Platinum, and more so with Iridium, are smaller than standard plugs which means the plugs will fire even in extreme cylinder pressure conditions and with less voltage.

Does this mean you will get increased horsepower from swapping out plugs?
No, not if your current plugs are currently igniting your A/F mixture properly.

It means the smaller electrodes are able to ignite the A/F mixture in higher compression motors than stock without needing to narrow the sparkplug gap. Also, being of a harder metal than standard plugs, they will last longer before needing replacement. Thats why a lot of new cars can run the OEM plugs for 120,000 miles before needing replaced. Thats about it in a nutshell.




I've been running the NGK DCPR7EIX Iridium plugs on my carbed '05 Night Train for about 6 years or so now.






Going to try the Denso IXU22 Iridiums this year. The Denso's have a .4mm electrode, vs .6mm for the NGKs.
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Mala Ipsa Nova
Psalm 144:1 Luke 22:36

'05 Carbed Night Train
111 rwhp, 112 rwtq
Best 1/4 ET 12.557s
Best 1/4 MPH 108.59
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post #19 of 30 (permalink) Old 02-03-2012, 04:37 PM
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You've got it.

One addendum though, would be that there's always room for improvement during the ignition stage. The extent to which a plug can ignite the air/fuel mixture (how much of it burns) equates to how much power the ignition process is able to produce, and how much waste there is from what didn't get burned (emissions). No spark plug out there is able to burn 100% of the air/fuel mixture.

A fine wire plug has less surface area than a traditional 2.5mm center electrode, which means there's less voltage required to jump the gap, reducing the chance of misfire. It also produces a more concentrated flame kernel as there's less surface area to hinder its growth. The thinner electrodes required the use of precious metals (such as platinum and iridium) to make the plug last as long as, and usually longer than, a traditional electrode.

Pulse technology, however, seems to be a game changer, making huge improvements in ignitability. The capacitor inside of pulse plugs stores up what is usually wasted energy and releases it with each spark sequence. That results in a stronger, more powerful spark that is able to burn a much greater amount of the air/fuel mixture. Scientifically speaking, that should translate to more power or better gas mileage (depending on how you choose to use it) and lower emissions.
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post #20 of 30 (permalink) Old 02-03-2012, 06:47 PM
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Pulstar plugs have been brought up on these forums before, but not in a good light.

Pulstar spark plugs


Link to BBB complaints against Pulstar:

Significant Complaints

Mala Ipsa Nova
Psalm 144:1 Luke 22:36

'05 Carbed Night Train
111 rwhp, 112 rwtq
Best 1/4 ET 12.557s
Best 1/4 MPH 108.59
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