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May 20, 2017 | 01:46 PM

skeazle

Thread Starter

6th Gear

Joined: Jun 2009

Posts: 14

Likes: 0

Horsepower

Anybody know how much H.P. difference there is between the 103b that is in my Heritage Softail and a 103 that is in rubber mounted ? I have done the exhaust change and the high flow air filter so should my bike have about the same H.P. now that the others have that did the same upgrade? I noticed that after the air filter change my plugs are still burning a little too white. I want them to be more tan in color. thanks, Jim

May 21, 2017 | 02:11 AM

OldEnuf2NoBtr

Seasoned HDF Member

Joined: Dec 2009

Posts: 9,166

Likes: 1,911

From: Doghouse... mostly

Pretty much ZERO.

May 21, 2017 | 07:18 AM

98hotrodfatboy

Seasoned HDF Member

Joined: Mar 2010

Posts: 21,143

Likes: 7,657

From: Poolville

Todays fuels will not tan the plugs... If your worried about it running lean, go get a good tune and yes the motor will run cooler and possible a little more umph.......

May 22, 2017 | 03:38 AM

13RoadKing

Banned

Joined: Jan 2017

Posts: 894

Likes: 25

From: Jacksonville FL

Quote:

Originally Posted by skeazle

I noticed that after the air filter change my plugs are still burning a little too white. I want them to be more tan in color. thanks, Jim

You cannot adjust anything if you have narrow band O2 sensor. Don't know year of your bike, check wiring diagram, narrow band O2 sensors have up to 4 wires, wide band ones have 5-6 wires.

May 22, 2017 | 10:41 AM

Hillsidecycle.com

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Joined: Dec 2007

Posts: 12,084

Likes: 829

Quote:

Originally Posted by skeazle

Damn little, if any.
Scott

May 22, 2017 | 11:49 PM

hog-doc

Outstanding HDF Member

Joined: Feb 2009

Posts: 2,005

Likes: 53

From: ID Ho

Build to build from an A motor to a B motor will see 3-5% less on the B to drive the counter balance hardware around...nothing your ever gonna feel seat of the pants!