O2 sensor
Yes. If you change you ecm to a Thunder-Max, Daytona Twin-Tec, and there are probably others. Revolution Performance offers their EMS for all Twin C ams, but for some reason the '04 models have to install an ECM from an '05 model. You should call them and discuss this with them since they'll be able to explain this. The good thing about their system is you don't have to pay someone to dyno your bike and tune it. They'll even weld the bung in your pipes for a reasonable charge.
I guess it depends on where you live and ride. I live in Az. where the elevations vary greatly. O2's read the amount of oxygen in the air and adjust the fuel mix for that. On earlier models w/o O2's the MAP (manifold air pressure) sensor made the adjustment. O2's probably do a somewhat better job or all the auto mfg. wouldn't be using them. The other advantage to the T-Max or EMS is if you are planning some engine upgrades. They will allow you to adjust for them like the SERT, but you don't really have to dyno the bike or pay a tuner.
Thread Starter
|
Cruiser
Joined: Oct 2010
Posts: 162
Likes: 0
From: Marysville, WA
What does ECM, EMS stand for? What is T-max? Is it the same as the TSS master tuner? Will the TSS master tuner do the same thing? I live in Washington State, if I ride to eastern Wa it's a high desert. To get over there I have to ride over mountain passes.
Stellar HDF Member
Joined: Feb 2010
Posts: 3,394
Likes: 263
From: Southern California
The Society of Automotive Engineers sets the standards for Abbreviations and Acronyms in their document: SAE J1930 (There are a few thousand of them.)
Your HD Workshop Manual lists those Abbreviations and Acronyms that apply specifically to your bike in the Glossary/Appendix.
You can also Google the Abbreviations and Acronyms you are curious about and they'll usually show up that way.
Your HD Workshop Manual lists those Abbreviations and Acronyms that apply specifically to your bike in the Glossary/Appendix.
You can also Google the Abbreviations and Acronyms you are curious about and they'll usually show up that way.
2nd Gear
Joined: Nov 2009
Posts: 6
Likes: 0
From: HB So Cal
O2 upgrade
I was thinking about doing this one myself. U R right that you will need a new ECM (engine control module ie; computer) that is of the 05 and up design (I have an 06 FLHT) the new computers have the added capability to read the sensors and run closed loop. I bought the TTS and spoke with the designer, do some research there. Advantage is to operate in closed loop during most cruise operation, this gives the most economical AFR. Additionally U can auto tune the ECM volumetric efficancy tables with the TTS if you have O2 sensors, other wise you need a dyno with an AFR sniffer to get the tables spot on for your combo. With that said I programmed the calibration from TTS that matched my combo and the bike runs great ( way better than the dealer stage II download).
Trending Topics
Thread Starter
|
Cruiser
Joined: Oct 2010
Posts: 162
Likes: 0
From: Marysville, WA
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
Grand HDF Member
Joined: May 2008
Posts: 4,624
Likes: 189
From: Newcastle, Ca.
If you want the bike to run better look into cams, a 2n1 and even a 95" kit. Or at least a stage 1.
Sorry, not trying to derail you. Just want to understand the reason for the expense.
Thread Starter
|
Cruiser
Joined: Oct 2010
Posts: 162
Likes: 0
From: Marysville, WA
It was something I had asked a local builder. Just me trying
to figure out cost vs benefit
My goal by the way is to install a k&n with a Screamin eagle
Back plate, python 2 into 1, Andrews 37N cam, SE cam tensioner
oil pump kit, Fueling lifter, S E quick change push rods.
I think that about covers it
to figure out cost vs benefit
My goal by the way is to install a k&n with a Screamin eagle
Back plate, python 2 into 1, Andrews 37N cam, SE cam tensioner
oil pump kit, Fueling lifter, S E quick change push rods.
I think that about covers it
Last edited by Papi; Feb 21, 2011 at 09:51 PM.