Slip-ons
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Joined: Oct 2008
Posts: 88
Likes: 1
From: Columbus,Ohio
Interesting that you all say no need for fuel management for the slip-ons. I was told by local HD mechanic (and friend so he was not trying to sell me anything) that if you step up from the stock 1 3/4 inch baffle, you would need the managment due to back pressure changes and the fact that the bikes come pretty lean from the factory anyway due to EPA standards.
I don't know the answer just repeating what I was told.
I don't know the answer just repeating what I was told.
Road Warrior
Joined: Jan 2007
Posts: 1,661
Likes: 2
From: Monroe, Louisiana
IMHO you need a fuel manager even if you leave it stock. I'm running my slipons w/o a fuel manager right now cause my dfo died. I changed back to the stock a/c to try and keep it from being to lean, but I can tell that it is running lean from the slight surge I get and the frosty white plugs. I wouldn't run it this way for an extended period of time, but the weather has been cool and I haven't been riding much. The big sucker goes back on along with a new PCIII after Christmas.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,609
Likes: 1
From: Indy area
To the original thread post: you can get by with just slip-ons, assuming you have a closed-loop bike, but any breathing changes, in or out, really benefit from a reassignment of some values in the EFI programming. If you don't want to go that route, a piggyback device that'll let you tune each cylinder individually is the next best choice.
Assuming you have a closed-loop bike, especially, and even if not, probably, you'll be smiles ahead to spring extra over the PC-III for the TTS tuning system. Trust me, I've done both.
Assuming you have a closed-loop bike, especially, and even if not, probably, you'll be smiles ahead to spring extra over the PC-III for the TTS tuning system. Trust me, I've done both.
Seasoned HDF Member
Joined: Oct 2007
Posts: 10,946
Likes: 818
From: Nevada
A book could be written on this topic, but this post best summarizes the answer.
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