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May 7, 2010 | 08:57 PM

RKC2010

Thread Starter

Cruiser

Joined: Oct 2009

Posts: 162

Likes: 0

From: Bremerton, WA

Stupid ?

Alright, for those of you that see me post, you know I can be all over the place. With that said, I'm trying to decide what to do next. I've added the 4point docking kit, passenger backrest and lowered the rear and front one inch with progressive kit's. I've been looking at seats, ( Danny Gray Big seat) and bars, ( hell I'm not sure yet). Well, now I'm looking at doing a stage 1 air cleaner. If I go with the stage 1 air cleaner and nothing else at this time, Exhaust and TTS Master tune to come later, do I have to have my engine re-mapped, or can I wait until I add exhaust?

May 7, 2010 | 09:01 PM

NoCoLoco

Road Warrior

Joined: Jul 2009

Posts: 1,979

Likes: 2

From: Northern Colorado

You need to re-map whenever you change the way the motor breaths.

May 7, 2010 | 09:04 PM

96roadking

Outstanding HDF Member

Joined: Mar 2010

Posts: 2,877

Likes: 2

From: Hallsville, Tx.

I would say that exhaust can be done without messing with the EFI but not so sure that I'd add more intake air without jacking up the fuel.

May 7, 2010 | 09:39 PM

J2X

Road Master

Joined: Aug 2008

Posts: 898

Likes: 66

From: Slidell, Louisiana

There are a few threads that explain this situation. Some gve the advise that the computer automatically calibrates the fuel air mixture.

May 7, 2010 | 10:14 PM

Texas Fat Boy

Extreme HDF Member

Joined: Dec 2006

Posts: 10,045

Likes: 36

From: ST. Louis

Quote:

Originally Posted by J2X

There are a few threads that explain this situation. Some gve the advise that the computer automatically calibrates the fuel air mixture.

This is what I believe. The O2 senors read what mixture is coming out of the motor and the computer adjusts it to whatever the mixture the computer wants.

When people change to K&N air filters on cars, you don't have to readjust the computers on them.

May 7, 2010 | 10:18 PM

Iceman24

Seasoned HDF Member

Joined: Sep 2009

Posts: 25,307

Likes: 2,443

From: Eastern NE

HD's run lean from the factory - you're OK w/pipes, but would recommend re-map if you change the breather. Another option is to add a tuner & adjust yourself. Cheers!

May 7, 2010 | 10:31 PM

NoCoLoco

Road Warrior

Joined: Jul 2009

Posts: 1,979

Likes: 2

From: Northern Colorado

I thought the O2 sensors could only make minor adjustments like for a change in altitude. I didn't think they could compensate for a freer flowing intake.

Last edited by NoCoLoco; May 7, 2010 at 10:36 PM.