From Our Friends at DynoJet:One big question is about re-mapping after changing the exhaust. Some say do it, other’s say it’s not necessary.
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Cattle software reviews. More does than do not. Do I need to remap if I change aftermarket exhaust for another aftermarket exhaust? The work has been done. Why do it again?To get the most performance out of your bike remapping the fuel injection is a must. With just a setup of pipes installed it is not imperative to remap the fuel curve as it will not run lean enough to cause any damage.
If you were to purchase an exhaust that is similar in size, shape, volume, and design then remapping the fuel injection may not be necessary. But if you go from a set of slip-ons to a 2:1 full system remapping will be necessary.Related Videos:Have more questions? Check out the Tags here and our Q&A index page to find some answers.Tags. 47 Responses to “Remap My EFI After New Exhaust?”. NandoBefore you buy a intake or a new set of shiny exhaust get yourself a fuel management system as this is necessary for the proper function of your ride.I use a vance and hines fuelpak and its the best purchase I did for my bike and this avoids a dynotune every time I do a simple upgrade.
DrewMy 2018 Street Glide will not start after installing Rinehart slip ons. What’s the problem?. DonI BOUGHT A NEW HD STREET GLIDE SPECIAL. ON THE BIKE IS A UP TO DATE AIR CLEANER AND A SET OF SCREAMIN EAGLE PIPES AND THE SYSTEM WAS MAPPED. DO YOU THINK THAT I SHOULD RE-MAPP WHEN I GET A NEW SET OF SLIPP -ON’S?. Dennis SantopietroHi Don, Congrats on the new ride. Most slip-ons do not require remapping.
Check with the manufacturer to be sure. MichaelWhat if I have a K&N high flow filter and change my stock pipes to a different style of stock pipes?
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I picked up a set that came off a newer touring model, but my 07 FLHT is in the fitment list. Part number is obsolete, but what I’ve found online shows they are a Screaming Eagle pipe yet they do not have anything on them saying Screaming Eagle. Service techs at local dealer say I am fine, bike is running awesome.
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I was told if there would need an issue it would be noticed right away. No back firing or choking out when I get on it. I still plan on having it dyno’d just to be safe. Customer Service TechsIf you make performance upgrades for your bikes airflow, you will need to add more fuel to the mix with a tuner.The bike may run ok but, ultimately, it will be lean.
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I second this recommendation. I was looking for what OP wants: deeper sound, maybe a bit louder, but nothing in the 'annoy the neighbors' range.I listened to endless sound samples online, and tried to pay attention to what bikes with aftermarket pipes sounded like out in the wild.I decided to put on Vance & Hines Big Shots. It was a mistake. WAY louder than anticipated, particularly from the before-and-after videos on the V&H site. Truly crazily loud, even with the 'quiet baffles', especially on the echoey downtown streets where I live. Couldn't get the bike above 2,000 RPM without it being (literally) deafening.
They made the bike a burden to ride. Not fun at all.In the end, I gave them up. Instead I went back to the original headers and put on Screaming Eagle slip-ons.
Deeper and a little louder than stock. I went with the black exhaust including adding the black heat shields, and I like the look a lot.Going from OP's wish list (deeper sound, staggered look, no divorce), I strongly recommend Screaming Eagle slip-ons. Well, being a 'burden' is a matter of personal taste, I guess.
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I have always subscribed to the philosophy that car drivers a) do NOT see me, and b) generally don't care if they see me, but loud pipes make a CLEAR difference when I'm in traffic (folks move over to let bikes they hear go past- quiet bikes get ignored), deer don't come near the road when I'm riding in the country, and my wife always knows when I get home from work, as she can hear me coming down the freeway half a mile away. Makes it easier to meet me at the door with a smile and a kiss:D. Slip-on pipes are cheaper than full pipes, and you get to keep the stock heat shields. Vance & Hines, Bassani, Rinehart, Bubb and Supertrapp all sell quality slip-on mufflers. Take a look through eBay's offerings, and realize that many suppliers are about 30% less-expensive than the dealer for the exact same part numbers.
I picked up my V&H ProPipe for just under $600 when it was new in late 07. The dealer wanted almost $900 for the same exhaust. I spent the difference on a full length bike lift so I could do any repairs and washing at chest level, without having to sit on the floor with a bad back and knees.Edit: make sure you pick one with 'free shipping', as many suppliers are happy to have your business enough to offer it. American Classic Motors has a great, reasonably prices store on eBay.
Depending on your intentions with the rest of the engine, you may want to go for slip-ons or the whole new pipes. Basically, if all you want to do is change the sound, slip-ons may be the way to go. Depending on the slip-ons you select, you may need to remap your computer to work with the new parts.I kind of have the same issue, I'd like something a little nicer than stock, without pissing off everyone in the surrounding counties. Realistically, if you change the way your bike breathes, then you need a new map.I'd recommend going for a complete stage 2 upgrade, but that might get a bit expensive. Personally, I am looking to replace my cams, so I'll need new intake, exhaust, and a new engine management system. The cost just snowballs from there because why not change these other things while I'm in there (things like rockers, valve springs, port and polish the head, etc.)Keep in mind, if you keep your bike the way it left the factory, it will run forever. When you start changing parts, you run the risk of burning through pistons, or other damage.
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