Plugs and wires?
Thread Starter
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Intermediate
Joined: Sep 2008
Posts: 30
Likes: 0
From: Seattle, WA
Plugs and wires?
I have an 08 Ultra set up with a stage 1, true dual Monster Ovals, and a PCIII. It has been dyno'ed a couple of times trying to get fuel management under control (my hog gets the WORST MPG of anyone I know...around 34mpg average with reasonable riding).
Now, I am not going to stop ridding just because my buddy's UC gets 44mpg with damn near the same set up, however, I was recommended to try Denso Iridum plugs with Magnecor wires to try for a slight MPG boost. Was able to pick up both for dirt cheap.
My question: is it safe to change out stock plugs and wires once a bike has been dyno'ed, or will the dyno be messed up?
Now, I am not going to stop ridding just because my buddy's UC gets 44mpg with damn near the same set up, however, I was recommended to try Denso Iridum plugs with Magnecor wires to try for a slight MPG boost. Was able to pick up both for dirt cheap.
My question: is it safe to change out stock plugs and wires once a bike has been dyno'ed, or will the dyno be messed up?
Grand HDF Member
Joined: Sep 2007
Posts: 4,122
Likes: 44
From: Boise Idaho
Magnacor wires are the best, I have replaced the wires on all my Harleys with those as I have found some very bad wires from Harley.
The plugs are a joke, nothing works any better than a plain old set of Autolights.
The plugs are a joke, nothing works any better than a plain old set of Autolights.
Advanced
Joined: Dec 2009
Posts: 79
Likes: 0
From: Athens, AL
How many miles are on the bikes? I don't remember what exactly happened when I got my '96 springer broke in, but when my '06 Victory broke in at around 8000 miles my mpg jumped from around 35 to 45 mpg. For me I thought it was pretty excessive jump, but my other Victory pals were all getting that kind of mpg.
Tourer
Joined: May 2009
Posts: 483
Likes: 1
From: Tampa Bay area, Florida
Really shouldn't affect your dyno at all, and sadly I do not see it affecting your gas mileage. Good luck though
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6th Gear
Joined: Oct 2009
Posts: 10
Likes: 0
From: NW Ohio
Did get better mpg when the bike was stock? Also were all of the changes made at one time or individualy. I am thinking the PCIII is your problem. I get about 42 on my 09 UC with close to the same setup.
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Thread Starter
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Intermediate
Joined: Sep 2008
Posts: 30
Likes: 0
From: Seattle, WA
To answer a few questions:
-I have 15000 miles on the mile (ALL put on by me)
-Had NO BETTER MPG stock
-Did all the mods at once and then did the dyno..however I had a bad PCIII. When the new one arrived I had the bike re-dyno'ed
-As of now am happy with the Magnecor wires...understand that the plugs will make no difference.
I will be changing out both however seeing that most people say it will not screw up my dyno and I am willing to try this to see if there is ANY difference in MPG.
-I have 15000 miles on the mile (ALL put on by me)
-Had NO BETTER MPG stock
-Did all the mods at once and then did the dyno..however I had a bad PCIII. When the new one arrived I had the bike re-dyno'ed
-As of now am happy with the Magnecor wires...understand that the plugs will make no difference.
I will be changing out both however seeing that most people say it will not screw up my dyno and I am willing to try this to see if there is ANY difference in MPG.
