You wont notice that little bit of added HP even slightly. You just gain noise and if that's what your after just get the slip-ons and don't waste your money on the AC.

 

Exactly. I'd bet HD will sooner void your warranty with those mods and no fuel management than if you did have one.

 

Been running with the old Screaming Eagle mufflers ( straight thru no packing or baffles) for about four years 30,000 miles on my 05,with just a download,some decel pop,big deal.Se air cleaner also.

 

One thing no one so far has mentioned is when the bike is in open loop, it will run leaner if you have a free breathing a/c. Closed loop the stock EFI will compensate, but open loop it will not. So when you get stuck in heavy traffic, it will run hotter than stock. I would not advise changing out the a/c without a fuel management solution.

 

I think what they were getting at is that you can do slipons and and big breather and not change the map. If you want to take FULL advantage of those add-ons though, get a map and dyno done. you will gain more HP and Tq and run cooler.

 

[QUOTE]
I was told by a harley mech that works at the local dealer (who just happens to be a friend of mine) that the newer, 08 and 09, have better "self" tuning capabilities then the older EFI, due to the way the 02 sensors work with the new ECM, and that they will pretty much never go lean the ECM will see the lean condition and compensate to eliminate it, remember when the lean conditions accurred and store it so it won't happen the next time. but that just means it will keep it around 14.7,[QUOTE]


Was told the same thing by my dealer, bought rush pipes and a/c. Told me the 09's have a newer system, told me no need for remap or commander. I would think they would have wanted my $$ and tell me I needed one.

 

Throw a set of XIED's on if you want it to run cooler with new a/c and slip ons. It will run cooler and if you need service work they take 1 minute to remove. After installing the V&H Fuelpak I am beginning to wonder why I didn't stick with the xied's myself, It ran better and was less worry.

 

Shovelhead Bob where are you?
Gary D.

 

You can typically get by with adding a set of muffers OR changing the air cleaner, but simply put the ECM cannot "self adjust" for free flowing mufflers AND a free flowing air cleaner. I will try to make it easy, first note that the closed loop operation strategy is to keep the AFR at 14.6:1, not to accomodate the use of different components. The Delphi EFI is a speed density system, is basically uses RPM X TPS X MAP to determine load and fuel requirements, it is programmed to deliver a X amount of fuel at a specific event based on the STOCK components. In closed loop areas it does have the ability to make some adjustment, however the code is written to limit adjustment window which is designed primarily to accomodate variances such as injector flow rate, engine tolerances, etc.., however adding free flowing mufflers AND an air cleaner is beyond the window of adjustment in closed loop and this was never the intention of the strategy in the first place. In extreme cases the ECM sees the additional fuel requirements, maxes out the closed loop integers, wonders why additional fuel is required, and sets the P0131/151 front/rear lean codes. It is also important to understand that the closed loop AFR target is 14.6:1, so what happens when you are beyond is ability to richen the mixture? Most importantly, note that anything out of the closed loop area has no adaptive ability so the ECM relies on programming for fuel delivery which again, is based on the stock components. So during brisk accelleration, upper throttle and RPM areas the ECM has no ability to make adaptive changes.
I have not seen the magazine article but unless you completely log all of the break points a simple dyno graph only shows a very small part of the story. Again I have not seen the article, but have thousands of hours tuning these bikes. I have 500+ dyno runs on our 2009 bike and have datalogged break points at a high resolution with the stock EFI and components as well as with many other combinations and have a pretty good idea what the EFI does when and why.

 

Jamie,
Just curious but what is the verdict with the "auto tune" module? Does it work well and have guys been buying them? Or is the PC-V premapped by you generally good enough?

Also, do you have maps for the new 09 HD Screamin' Eagle TOURING Mufflers with or without high flow a/c?

Is the PC-V simple plug n play or do we need to hook it up to a laptop to make settings? (I saw others talking about throttle settings?)