V&H FP4 experiences?
#11
Join Date: Jul 2010
Location: The free State of Florida!
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Done it a couple times using 2-3 tanks of gas each.
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SharkyCA (04-19-2023)
#12
You download a canned tune and see if it works for your bike.
If your bike runs great then you are all set.
If you feel it still needs a little help then you turn on the autotune and ride the bike in as many environments as you can like interstate, twisty mountain roads, fast two lane, city riding with traffic.
Once you're done riding for the day you flash the tune to your bike.
Then do it again. They say it usually takes a couple tanks to get a good tune out of autotune.
After you've autotuned a couple times then your finished and you can remove the tuner or leave it on to read bike data.
I personally never had to autotune my SG. Runs great with the canned tune from V&H.
The following 3 users liked this post by Hecklerboy:
#13
No that's not exactly how it works.
You download a canned tune and see if it works for your bike.
If your bike runs great then you are all set.
If you feel it still needs a little help then you turn on the autotune and ride the bike in as many environments as you can like interstate, twisty mountain roads, fast two lane, city riding with traffic.
Once you're done riding for the day you flash the tune to your bike.
Then do it again. They say it usually takes a couple tanks to get a good tune out of autotune.
After you've autotuned a couple times then your finished and you can remove the tuner or leave it on to read bike data.
I personally never had to autotune my SG. Runs great with the canned tune from V&H.
You download a canned tune and see if it works for your bike.
If your bike runs great then you are all set.
If you feel it still needs a little help then you turn on the autotune and ride the bike in as many environments as you can like interstate, twisty mountain roads, fast two lane, city riding with traffic.
Once you're done riding for the day you flash the tune to your bike.
Then do it again. They say it usually takes a couple tanks to get a good tune out of autotune.
After you've autotuned a couple times then your finished and you can remove the tuner or leave it on to read bike data.
I personally never had to autotune my SG. Runs great with the canned tune from V&H.
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SharkyCA (04-19-2023)
#14
If you have your phone visible during autotune runs you will see a VE table representation of RPM vs throttle position. When you have a stable point the cell will turn orange when the cell has been computed it will turn green.
If you can find the right road it should be possible to get a good proportion of the table filled in with very few miles. The shape of the green cells will look like a rugby ball.
If you are not confident in going all out for as much as possible or if you are only interested in getting a small portion tuned for pottering around then that is all you need do. I don't think there is any in game purchases for a best score! LOL.
If you can find the right road it should be possible to get a good proportion of the table filled in with very few miles. The shape of the green cells will look like a rugby ball.
If you are not confident in going all out for as much as possible or if you are only interested in getting a small portion tuned for pottering around then that is all you need do. I don't think there is any in game purchases for a best score! LOL.
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SharkyCA (05-18-2023)
#17
When you plug the Digital Tech into a bike after it's been flashed with FP4, there is a notation set to the VIN, but no voided powertrain anymore. FTC Agreement with H-D states that they can no longer void warranties for using 49/50-state-approved products, the FP4 being 49-state compliant.
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SharkyCA (05-18-2023)
#18
The FP4 is different. It is the first aftermarket tuner that is EPA-compliant and 49-state certified. Harley cannot legally void your warranty for using an FP4.
BUT, this also means the FP4 is a very limited tuner; it can only tune Stage 1 components (intake and exhaust). It doesn't support camshafts or big bore kits or anything else. Maybe someday it will, to some degree, but as of right now it cannot be used for Stage 2 or higher.
The following 3 users liked this post by FatBob2018:
#19
Not quite. The restriction isn't about a non-HD tuner, it's about a non-EPA-compliant tuner. Now, those used to mean the same thing, as no aftermarket tuner was EPA-compliant, so using any aftermarket tuner did result in immediately voiding the warranty on powertrain components.
The FP4 is different. It is the first aftermarket tuner that is EPA-compliant and 49-state certified. Harley cannot legally void your warranty for using an FP4.
BUT, this also means the FP4 is a very limited tuner; it can only tune Stage 1 components (intake and exhaust). It doesn't support camshafts or big bore kits or anything else. Maybe someday it will, to some degree, but as of right now it cannot be used for Stage 2 or higher.
The FP4 is different. It is the first aftermarket tuner that is EPA-compliant and 49-state certified. Harley cannot legally void your warranty for using an FP4.
BUT, this also means the FP4 is a very limited tuner; it can only tune Stage 1 components (intake and exhaust). It doesn't support camshafts or big bore kits or anything else. Maybe someday it will, to some degree, but as of right now it cannot be used for Stage 2 or higher.
As I understand it the FP4 is EPA compliant which is why its capabilities are limited to stage 1 modifications but that said?…the cats on softail exhaust systems are in the stock mufflers (unlike touring model M8’s where the cats are in the head pipes so going the slip-on route was similar to getting full system results decibel and sound quality wise.
The V&H tech walked me through the entire installation and flashed a canned map that was Dynojet developed for V&H 3” slash cut slip-ons telling me it would be plenty close enough and that only about 10% of the folks who run off the beaten trail systems would benefit from the auto tune feature and to run 2-3 tanks through before making any decisions because he felt that canned map would work out perfectly as it’s been a popular and well received map for any slip-ons with hundreds of documented dyno runs supporting that statement. He also added the stock ECM supports +/- 12% adjustments of the fuel mapping through the stock exhaust narrow band O2 sensors which is why he advised to run 2-3 tanks through before drawing any conclusions.
2 weeks later I agree with everything he said and I watched as my range and mpg started out like 170/36mpg and slowly leaned back up to 200+/45-47 mph and the bike is running like a bear. Nothing dramatic like with stepped headers and cams but enough so that my seat of the pants dyno can detect a noticeable improvement especially during power passing situations.
Note: I wasn’t going for any dramatic performance increases. I just want more decibels (to be heard for safety reasons) and the bonus points of a cooler running engine and I got both with no loss of range/mpg’s
#20
I’ve heard a lot of badness about the FP4 but I’m hearing most of that badness is straight up BS and urban myth one being that as soon as you plug it in it flags your ECM (and that part is believable) but I also hear that the stock ECM will eventually stop accepting the modified flashing and one day your bike won’t start and that’s the part I’m hearing is BS but there’s so much BS out there these days it’s hard to extrapolate any truth from it so if you own and use a V&H FP4 fuel tuner what has your experience been?
Note: I’m only looking to put on Khrome Werks slip-ons but the manufacturer recommends fuel tuning because they get rid of the cat and are so free flowing
Note: I’m only looking to put on Khrome Werks slip-ons but the manufacturer recommends fuel tuning because they get rid of the cat and are so free flowing
Use punctuation please.