I've read several threads but am still not too clear on this. Have an 08 FLHT and installed some IED's a year or so ago. Just recently installed the Full Sac conversion, and K&N filter cartridge in stock AC. Am running stock muffs.

Took bike out for a 200+ mile loop on I-80 staying at speed limits, and pulled 52mpg. Normal for this bike has always been 46 mpg.

Bike feels like it is running well throughout rpms; no flat spots etc. that I can tell. It IS a bit louder, but everything else feels the same.

I'm not really looking for any increased HP or performance, so my question is: Do I really need to put in a fuel management modification? Bike has never had any dealer downloads. Is there any chance that I could be ruining the engine by not running a correct fuel/air mix?

What do you guys think?

Thanks for any input......

 

Check their website or give em a call.

 

It sounds like your bike is running well, and the IEDs will work pretty much the same with the Fullsac as with the stock y-pipe.

 

In my opinon yes once you change the airbox out and exhaust you are causing your bike that is already running a little lean to become even leaner. I would put in a new set of plugs take it for a ride and see if they turn a little tan. If they are white and chalky looking odds are you are running really lean.

 

I didn't change the airbox...just the filter element...from a stock HD element to a K&N element.


Do you think that would make that much difference in air flow so as to lean it out? I was kind of thinking that the IED's might compensate for any slight change a K&N might make over a stock filter element.

Thank you for your thoughts.....