My 07 EGC engine is stock.&nbsp\\; I can buy a set of 2004 Screaming Eagle Touring slip ons for a good price.&nbsp\\; I'd like to test them to make sure I like the sound before adding a new air filter &amp\\; PC III.&nbsp\\; Can I run the with the stock intake &amp\\; flash for about a month without doing any harm to the engine?&nbsp\\; I asked this same question&nbsp\\;with 2 serperate HD service manglers in our area &amp\\; got 2 different answers.&nbsp\\; Help!!!!

 

as long as you do not alter the air mixture you will be safe with slip ons. I have D&amp\\;D slip ons that I installed and it runs just fine. I am scheduled heavy breather and sert next month.

 

Yes you can run the exhaust without the flash, your new pipes will pop on decel because of the naturally lean condition of the tuning.&nbsp\\; No you cannot run the intake without the flash.&nbsp\\; The old style SE slip ons sound pretty good.&nbsp\\; I've got a set with lots of miles on them they get better with age.&nbsp\\; I'm not ready to part with them just yet.

 

I highly doubt there even is a flash for your ECU with those mufflers.

As has been said, you will be safe to run the stock flash with them. The Adaptive Fuel mechanism in the ECU will pretty much handle things for you, but you will need to reset the AFV prior to installing the PC-III if you are going to use a canned map. The two ways to reset the AFV are at the shop with the Digital Technician or by re-installing the stock mufflers and riding normally for a while.

 

Thanks to all.&nbsp\\;
glens, I'm not familier with resetting the AFV, but then I'm not familier with a lot of electronic things (I'm 60 &amp\\; grew up&nbsp\\;with carbs).&nbsp\\; When you say re-install the stock pipes &amp\\; ride normally for a while,&nbsp\\;how many hours or miles equals&nbsp\\;"a while"?&nbsp\\; On the other hand, do you think if I leave them on&nbsp\\;I can&nbsp\\;rely on the tech&nbsp\\;to re-set&nbsp\\;the AFV&nbsp\\;when he adds the PC III?&nbsp\\; I probably won't go with a dyno a first, just a canned map, if one can be dredged up for the combo I'll be running.
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The AFV is a variable factor the computer uses when determining the amount of time to have the fuel injectors operating. The computer checks many things in making that decision. The way it is programmed, it pretty much knows how much fuel to use for each situation. When the system is getting/using feedback from the exhaust sensors it can check itself. When it needs to make corrections to obtain the proper exhaust composition it is usually because of things like differing fuels (oxygenated or not), a dirtying air filter, etc. Such things produce relatively uniform deviations from normal so the simple factor works well. The factor is used in every situation, even when the engine is not in a running mode where the computer can use feedback from the exhaust sensors.

As and when the factor needs updating it replaces the old value the computer has been using. The value is kept in memory even after the power is turned off, for immediate use the next time the engine runs. The value even survives having the battery disconnected.

Altering engine breathing components can induce changes in the AFV which are not linear across operating ranges. For specific intake and exhaust components, the factory provides downloads for the computer to correct the programming so the AFV can stay centered and be properly functional in every operating area. If the component list is not matched exactly to the factory download it is really hit-or-miss. I would bet that for the 07 and newer engines there is no factory download available for historic mufflers. Maybe if there is one for off-road use, but certainly nothing with EPA stamp-of-approval as those older mufflers are not EPA-approvable.

I do not know of a specific time-frame for reseting the AFV. I would suggest a good solid 10 minutes of steady closed-loop operation should take care of it. The more the better, just to be sure.

If you are having the PC-III installed by a savvy tech and he has the instrumentation, he can reset the AFV for you by talking directly to the engine control computer. If he is going to develop a custom map for the PC-III for your bike then it is probably not all that important to reset the AFV. With a canned map we (hopefully) can assume the person who created it had previously reset their AFV. Having talked to one such famous-around-here individual I would say that may well not be the case (that they had reset the AFV). I believe that as much as anything it is the underlying cause for different folks to have different experiences with canned maps. If everyone had the same AFV then it would be merely down to production-line differences between the engines. I believe it is a combination of that and differing AFVs in the computers.

As a prime example I had been running an otherwise stock 07 touring-family bike for about 1000 miles with aftermarket slip-on mufflers when I got a PC-III and an air cleaner assembly to complete the package. The map was not right. Close, but not nearly as good as I would have figured. It was so fat on top that it would hardly run.

After discovering the new computers had Adaptive Fuel capabilities I put the stock breathing stuff back on, took a little road trip (an embarrassing one because of the [lack of] sound), then put all the aftermarket stuff back on and it ran (and still does) like a champ everywhere.

Knowledge is our friend.

One thing for you to take into consideration while evaluating those mufflers is that they will definitely be louder/harsher-sounding just letting the stock engine computer handle things with them than when there is proper fueling being provided by the PC-III.

 

Thanks glens.&nbsp\\; Members like you make this forum great.

 

The old style SE slip-ons sound way better than any of the cureent EPS'd versions.

 

pab, I did it for a couple of months and it was fine.&nbsp\\; The decel pop they mentioned will happen but that is to be expected.&nbsp\\; I went with the SE A/C and SERT to fix all the decel and pinging issues.&nbsp\\; It will still ping sometimes in the rockies but it is all good.&nbsp\\; Enjoy the sound of those and they are definetly better than the ones you can get today.

 

Sorry for keeping this thread going for so long, but I've noticed that all members advising it's o.k. to run slip-ons without a re-map, SERT, or PC III are (1) in the north or the Rockies (I'm in Tennesse where it's HOT !!! right now), and/or they are riding pre-2007 bikes.&nbsp\\; All things considered, can I safely go with slip-ons without changing the flash for a while, or should I wait until the $$$ is available &amp\\; do it all at once?
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Thanks all.