explain why i need to remap
Road Warrior
Joined: Apr 2010
Posts: 1,739
Likes: 10
From: Suffolk, England
Your cage has either a (map) Manifold absolute presser sensor, or a (maf) Mass air flow sensor, These tell the computer how much air the engine is ingesting, so your cage is better at adapting to changes in exhaust and air cleaner changes.
Harley EFI lacks these sensors, so the computer is set with very narrow parameters, when you make a change, in a/c and exhaust, the airflow into the engine changes, and exceeds the set parameters, therfore they need to be changed, to accommodate the new airflow.
Harley EFI lacks these sensors, so the computer is set with very narrow parameters, when you make a change, in a/c and exhaust, the airflow into the engine changes, and exceeds the set parameters, therfore they need to be changed, to accommodate the new airflow.
As for whether the ECU on '07+ Harelys can cope with stage-1 hardware without mod then have a little read here: http://www.aimag.com/wordpress/2010/...low-1-hr-tech/ and here: http://www.nightrider.com/parts/ied_faq.htm
Road Warrior
Joined: Apr 2010
Posts: 1,403
Likes: 72
From: North Dakota
Foxster is right. H-D Stage 1 download has slightly different timing baseline (another learned behaviour of your ECM) and bumps up the RPM limiter, NO FUEL ADDED per California Air Resources Board evaluation report.
Download the instructions for TTS Master Tune. Read it, understand it and you will never have to guess again. Even they admit in the instructions that a tuner is not necessary for normal operation but is desirable to get as close to perfect a Harley motor can be.
Download the instructions for TTS Master Tune. Read it, understand it and you will never have to guess again. Even they admit in the instructions that a tuner is not necessary for normal operation but is desirable to get as close to perfect a Harley motor can be.
Ultimate HDF Member
Joined: May 2008
Posts: 6,642
Likes: 48
From: Ogden, UT
07 up ECM's with o2 sensors CAN compensate for the changes you made, but it will only get you back to stock AFR settings. which most believe is a bit lean, but it is safe. If you get stuck in lots of traffic, a tuner is a damn good idea so you can lower the AFR to help her run a little cooler.
In laymen terms....
Narrow band o2 sensors means they can only get you back to a preset AFR, Wide Band sensors like I have in my ThunderMax allow you to make bigger changes and lower the AFR, I run around 13.5 which makes a huge difference in heat produced.
In laymen terms....
Narrow band o2 sensors means they can only get you back to a preset AFR, Wide Band sensors like I have in my ThunderMax allow you to make bigger changes and lower the AFR, I run around 13.5 which makes a huge difference in heat produced.
6th Gear
Joined: Feb 2012
Posts: 10
Likes: 0
From: Minneapolis
What about XIED's? Would that drop the ratio low enough, or is it a $100 gamble? From what I have read, if you get it down to 13.8 by "tricking" the computer it would be a sufficient adjustment. Sorry if this is a dead horse. I'm new to Harley- recovering Ducati addict.
Ultimate HDF Member
Joined: May 2008
Posts: 6,642
Likes: 48
From: Ogden, UT
What about XIED's? Would that drop the ratio low enough, or is it a $100 gamble? From what I have read, if you get it down to 13.8 by "tricking" the computer it would be a sufficient adjustment. Sorry if this is a dead horse. I'm new to Harley- recovering Ducati addict.
My only point would be that they do not allow optimum performance to be gained. I tried other tuners first, FuelPak, PC III, before buying a ThunderMax, I wish I had done it right in the first place instead of spending money on what were in the end, half measures.
Ultimate HDF Member
Joined: Apr 2010
Posts: 7,138
Likes: 26
From: Southern Oregon
What about XIED's? Would that drop the ratio low enough, or is it a $100 gamble? From what I have read, if you get it down to 13.8 by "tricking" the computer it would be a sufficient adjustment. Sorry if this is a dead horse. I'm new to Harley- recovering Ducati addict.
150.00
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Intermediate
Joined: Mar 2011
Posts: 35
Likes: 0
Umm, actually Harleys do have MAP sensors, along with several others.
As for whether the ECU on '07+ Harelys can cope with stage-1 hardware without mod then have a little read here: http://www.aimag.com/wordpress/2010/...low-1-hr-tech/ and here: http://www.nightrider.com/parts/ied_faq.htm
As for whether the ECU on '07+ Harelys can cope with stage-1 hardware without mod then have a little read here: http://www.aimag.com/wordpress/2010/...low-1-hr-tech/ and here: http://www.nightrider.com/parts/ied_faq.htm
In regards to the OP's request for info concerning whether he was good to go, would it also depend on if a MAF was present? I found a sensor connection plugged into the back of the air cleaner (FXDC) base plate. No active connection, does something get added to this to allow ECUs to accomodate higher air intake flow?
Ultimate HDF Member
Joined: May 2008
Posts: 6,642
Likes: 48
From: Ogden, UT
In regards to the OP's request for info concerning whether he was good to go, would it also depend on if a MAF was present? I found a sensor connection plugged into the back of the air cleaner (FXDC) base plate. No active connection, does something get added to this to allow ECUs to accomodate higher air intake flow?