Still no issues useing 89 oct!
Tourer
Joined: Mar 2010
Posts: 427
Likes: 1
From: Hot Springs, AR
I thought modern Harleys have a method to detect pinging and adjust timing automatically to prevent it. Something about the ECU monitoring spark decay voltage to sense pinging. I guess motor performance would be reduced if it retarded timing.
After a minute of research, Google says Harley has a patent on the spark decay voltage method of knock detection but I don't know if it's used on current bikes.
After a minute of research, Google says Harley has a patent on the spark decay voltage method of knock detection but I don't know if it's used on current bikes.
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
Likes: 173
From: Simi Valley, CA
Problem with this line of thought is that so many riders out there wouldn't hear pinging, or even have a clue what they were hearing if they did hear it. Just read some of the pinging threads around here and that will be obvious.
Road Captain
Joined: Dec 2007
Posts: 585
Likes: 59
From: Near St. Louis, Mo.
I always laugh at this argument. Have seen it posted before and everyone gets started. Most of us have basically spent 20 to 25000 of a toy. We don't think a thing about spending money for add ons. Then we worry about spending another 25 or 30 cents a gallon to put in the recommended fuel. Give me a break. LOL
I always laugh at this argument. Have seen it posted before and everyone gets started. Most of us have basically spent 20 to 25000 of a toy. We don't think a thing about spending money for add ons. Then we worry about spending another 25 or 30 cents a gallon to put in the recommended fuel. Give me a break. LOL
Novice
Joined: May 2006
Posts: 18
Likes: 0
From: Naples
Except I only get 35 MPG and they are now charging a 30 cent difference between grades and I get 5% cash back from my credit card. I dropped down t 87 when I'm riding the highway all day and don't notice a bit of distance....
Last edited by sir_will_yum; Mar 20, 2013 at 07:29 PM.
Extreme HDF Member
Joined: Dec 2007
Posts: 13,402
Likes: 941
From: Illinois
omaho5:
Less of the charge will burn during combustion and deposits will build up faster leading to preignition. The very thing that some think high octane will avoid. Want to build up deposits in the combustion chamber even faster. Use octane booster. That stuff will build up spots of purple deposits that will hold heat and cause pinging.
Life gets complicated.
Less of the charge will burn during combustion and deposits will build up faster leading to preignition. The very thing that some think high octane will avoid. Want to build up deposits in the combustion chamber even faster. Use octane booster. That stuff will build up spots of purple deposits that will hold heat and cause pinging.
Life gets complicated.
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
Thread
Thread Starter
Forum
Replies
Last Post
2011Iron883
Sportster Models
12
Mar 27, 2011 11:04 AM