Fat Bob 114 Fuel Moto Power Vision With Just Slip-Ons
#21
That's the way things used to be. That is not how things are now. Harley is under court-mandated orders to void every powertrain warranty on every 2017+ bike if they (or their dealer) has any knowledge whatsoever that an aftermarket tuning device was used. They have no choice. Their dealers have no choice. It is a court order that you can read about in the EPA Consent Decree.
#22
I'm still not sure how the SEPST can really change much. It can't change AFR's to stay EPA compliant. From what I can tell it just tweeks timing to adjust things. I'm sure there is more to it than that but I still don't see the value (besides keeping one's warranty) of the SEPST.
We've had guys on here who have had dyno tunes using the SEPST as their tuner; mjwebb is an example, and he's quite happy with the improvements that were made to his bike using just the SEPST.
On the other hand, we've had dyno tuners like FLTRI7 who say that if all you've got is the SEPST, you don't really need to run a full dyno session, just put in the proper base calibration and then run a couple of SmartTune sessions and that'll be about as much as you can expect to get out of an SEPST.
So no, it's not capable of as much as a non-compliant tuner could do. But, it is the only tuner on the market that can be used and maintain the warranty. Generally you use it to establish a proper base calibration, then run the SmartTune a few times to help it dial in the tune for your exact components.
Or, you could get the SE Auto Tuning Module, which works in conjunction with the SEPST to adjust the tune on the fly to prevailing conditions. There are some on here who have it and love it, there are others who cast serious doubt as to its effectiveness, I just bring it up as another way to stay EPA-compliant and warranty-friendly while optimizing the tune for your particular configuration.
Last edited by FatBob2018; 05-28-2018 at 07:02 PM.
#23
#24
Someone earlier posted this somewhat interesting link:
https://jalopnik.com/how-a-car-compa...our-1821736111
Simply put, the Motor Company is under federal edict by the courts to void warranties if an aftermarket tuner was used. They either are, or are not, smart enough to know about the PowerVision advertising, and either did or did not build in some ways to detect when an aftermarket tuner was used. Since they were fined millions and millions of dollars, and probably face severe penalties if they fail to follow up on their court-ordered responsibilities, I think it would be safe to bet that Harley knows more about their own system than PowerVision does, y'know?
But, maybe they don't, and maybe PowerVision outsmarts them. That's a gamble you'd have to decide if it was worth it to you. By the letter of the law, the warranty is void, whether the PowerVision restores the factory tune or not.
#26
can't give you a direct link to it.
http://prosupertuner.harley-davidson...ENU/index.html
Last edited by Rakthi; 05-29-2018 at 11:56 AM.
#27
#29
You don't have to run the smart tune session; in fact I would bet most people don't, as it's a bit of a hassle.
The canned tune should be reasonably close, and the ECM does have the ability to adapt to current conditions within reason. The SmartTune evaluates your bike's actual installed components and adjusts the base tune to accommodate differences in the actual running parts you're using. As such, it's probably a good idea to do at least one or two SmartTune sessions, especially if (like me) you're not using the same exact components that the base calibration was intended for. I'm running Stage II, so my cam and A/C match what Harley's calibration was designed for, but my mufflers are S&S and not Street Cannons; because of that difference, I decided to SmartTune it a few times.
The canned tune should be reasonably close, and the ECM does have the ability to adapt to current conditions within reason. The SmartTune evaluates your bike's actual installed components and adjusts the base tune to accommodate differences in the actual running parts you're using. As such, it's probably a good idea to do at least one or two SmartTune sessions, especially if (like me) you're not using the same exact components that the base calibration was intended for. I'm running Stage II, so my cam and A/C match what Harley's calibration was designed for, but my mufflers are S&S and not Street Cannons; because of that difference, I decided to SmartTune it a few times.
#30