My pig headed buddy insists he can install wild pig pipes and a SEAC only on his 07 Road King. Fuel management is not necessary with this setup - is his exact quote. Please - reply so I can email him all the responses to his stupidity. I tell him he will at least burn out his 02 sensors and possibly burn his valves and probably much more damage. He's my BRO - maybe he'll listen to you guys...

 

If he was just doing some moderate pipes..then maybe yeah.
But if he's doing the AC too...time for some fuel management.

lp

 

You are correct. He is looking to do major damage to his engine without some sort of fuel management system. Do a search on this and you will find lots of stuff to email him.

Ride safe,

 

More Air Flow - Less Back Pressure (Exhaust)... Will run it even leaner... LEAN = HEAT...
Watch the spark plugs - They'll tell the story -

 

I installed a terry components terminal valocity 11 to avoid any problems! Better to be safe than sorry.

 

I just scheduled my scoot for a set of Rush 2 1/4 SERT and SEAC. The dealer warned that if I even just went with the slip on and no SEAC it could void my warrentry. I would tell your freind to check with the stealer before making those mods.

 

I've "talked" about this some in several threads recently.

The '07 (and up?) Delphi ECU has auto-tuning capabilities. It will note differences in the amount of fuel it needs to supply while in closed-loop mode and alters a multiplication factor for the Volumetric Efficiency tables. It applies this factor to them at all times. When you get up out of the closed-loop range things should be good.

But this assumes the VE tables are otherwise correct. If whatever you're swapping onto the bike would require various portions of the VE tables to change relative to one another you're playing with fire without addressing the situation by either changing the values directly via a dealer download or with the SERT, or by piggybacking another unit onto the ECU.

If by chance what you're swapping onto the bike would require VE changes that are merely a few percentage points the same throughout the table (probably slip-on mufflers, but not pipes or airbox, would be close enough) the stock ECU by itself will work quite well, though still EPA lean down low.

Yes, decreasing the backpressure can result in a leaner running condition, but the adaptive fueling capabilities have a fair range and will remedy the situation.

Mufflers of different designs will have varying flow characteristics at different engine speeds (which would tend to alter VE requirements non-uniformly) but not nearly so much as a different airbox assembly (like the SEAC, Ness, K&N, etc). At small throttle openings the main obstruction is the butterfly valve. As it opens, the main obstruction shifts outward to whatever is present outside the throttle body. With the stock airbox it'll be the outside opening. That is pretty much non-existent with the others. So what'll happen is the adaptive fueling mechanism will not really note the difference in the intake system. When you open up the throttle and get out of closed loop, the VE factor will be way lower than it needs to be and you will be lean. Don't do it.

(the O2 sensors should not be affected by anything, but the stuff in the heads will)

 

He'll lose significant power and torqueespecially down low where he doesn't have enough to begin with. Once he starts riding it will get so hot below his jewels that he'll want to be making changes without anyone telling him to. His pipes will turn nast colors all the way back to the mufflers and even the mufflers may blue.

He'll come around to wanting a cooler running and more powerful bike real quick.