No tuner, no Dyno?
Thread Starter
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Road Captain
Joined: Aug 2009
Posts: 535
Likes: 1
From: CA
No tuner, no Dyno?
I am running slip ons now and the HD shop says if I go to a full system the only thing I will need is a dyno to tune it, but supposedly can't run a PCV without voiding warranty.
My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.
Basically my question is, has anyone had a dyno without having a tuner?
My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.
Basically my question is, has anyone had a dyno without having a tuner?
Tourer
Joined: Jun 2008
Posts: 272
Likes: 0
From: In your closet
Firstly, why are you looking to dyno your bike? By doing so, you'll just get hp and torque figures. Secondly, WTF is this shop saying you can't dyno a bike without 'tapping into the ECM and doing damage"? If you want to know hp at specific rpms, you simply clamp on a lead to one of your spark plug leads, and bingo boffo... If he's referring to 'tuning' your ECU, he's not correct about that either. HD sells either a tune-able ECU, or sells the software to tune your own.
You can also buy one of the myriad of 'tuners' sold for HD's. A Power Commander is one of them. If a PC5 is available for your bike, then you can also buy the optional 'Auto-Tune" which plugs into the PC, as well as your o2 sensors, and maps the bike while you ride, eliminating the need for 'dyno tuning'. There are other tuners sold that also have the same capability. The downside to these are while the do map your bike, they don't get it perfect, so you're gonna leave a little power and efficiency on the table. For a street bike however, they're perfectly fine.
Last edited by fastkevin; Sep 27, 2009 at 12:54 AM.
Thread Starter
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Road Captain
Joined: Aug 2009
Posts: 535
Likes: 1
From: CA
What?
Firstly, why are you looking to dyno your bike? By doing so, you'll just get hp and torque figures. Secondly, WTF is this shop saying you can't dyno a bike without 'tapping into the ECM and doing damage"? If you want to know hp at specific rpms, you simply clamp on a lead to one of your spark plug leads, and bingo boffo... If he's referring to 'tuning' your ECU, he's not correct about that either. HD sells either a tune-able ECU, or sells the software to tune your own.
You can also buy one of the myriad of 'tuners' sold for HD's. A Power Commander is one of them. If a PC5 is available for your bike, then you can also buy the optional 'Auto-Tune" which plugs into the PC, as well as your o2 sensors, and maps the bike while you ride, eliminating the need for 'dyno tuning'. There are other tuners sold that also have the same capability. The downside to these are while the do map your bike, they don't get it perfect, so you're gonna leave a little power and efficiency on the table. For a street bike however, they're perfectly fine.
Firstly, why are you looking to dyno your bike? By doing so, you'll just get hp and torque figures. Secondly, WTF is this shop saying you can't dyno a bike without 'tapping into the ECM and doing damage"? If you want to know hp at specific rpms, you simply clamp on a lead to one of your spark plug leads, and bingo boffo... If he's referring to 'tuning' your ECU, he's not correct about that either. HD sells either a tune-able ECU, or sells the software to tune your own.
You can also buy one of the myriad of 'tuners' sold for HD's. A Power Commander is one of them. If a PC5 is available for your bike, then you can also buy the optional 'Auto-Tune" which plugs into the PC, as well as your o2 sensors, and maps the bike while you ride, eliminating the need for 'dyno tuning'. There are other tuners sold that also have the same capability. The downside to these are while the do map your bike, they don't get it perfect, so you're gonna leave a little power and efficiency on the table. For a street bike however, they're perfectly fine.
Road Captain
Joined: Jun 2007
Posts: 547
Likes: 2
From: Oregon
I've had 3 baseline dyno readouts done to my bike. Stock, with Rush slip-ons and with KW slip-ons.
My main purpose was to verify the air fuel ratio, which should be included with each dyno run. I wanted to be sure that the a/f ratio didn't change after installing the slip-ons.
I have no other mods. Just slip-ons.
My main purpose was to verify the air fuel ratio, which should be included with each dyno run. I wanted to be sure that the a/f ratio didn't change after installing the slip-ons.
I have no other mods. Just slip-ons.
Thread Starter
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Road Captain
Joined: Aug 2009
Posts: 535
Likes: 1
From: CA
I have Stage 1, but I think I am going to go with the PCV.
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Banned
Joined: Mar 2007
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From: Woodstock, Ont , Can
I am running slip ons now and the HD shop says if I go to a full system the only thing I will need is a dyno to tune it, but supposedly can't run a PCV without voiding warranty.
My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.
Basically my question is, has anyone had a dyno without having a tuner?
My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.
Basically my question is, has anyone had a dyno without having a tuner?
Ron
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Tourer
Joined: Mar 2009
Posts: 421
Likes: 2
From: United Socialist Republic of Massachusetts
I am running slip ons now and the HD shop says if I go to a full system the only thing I will need is a dyno to tune it, but supposedly can't run a PCV without voiding warranty.
My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.
Basically my question is, has anyone had a dyno without having a tuner?
My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.
Basically my question is, has anyone had a dyno without having a tuner?
the dealer can change your ECM programing (they have to keep it with in EPA Specs)
A dynamometer or "dyno" for short, is a device for measuring force or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed (rpm).
Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
Likes: 6
From: Leander Texas
man your dealer is giving you some BS. better get advice in the forum or from an indi
to answer the question "has anyone had a dyno without having a tuner?"
yes my sportster was carb and i had a few dyno runs done to check the afr but no dyno tunes.
to answer the question "has anyone had a dyno without having a tuner?"
yes my sportster was carb and i had a few dyno runs done to check the afr but no dyno tunes.
Last edited by tk353; Sep 27, 2009 at 11:24 PM.