Fuel additive
Cruiser
Joined: Oct 2009
Posts: 123
Likes: 2
From: dual locations: wash. & az.
Other things to use
I have found, while out on a long trip across country on my High compression Hot build 2000 FXDS. When not able to get at least 91 octane, I would put a mix of diesel into the tank, using a little more than 40/1 mix... This made my bike run Better than when on 92 octane gas.. It didn't Ping-knock at all and i HAD to use 87 octane.. Careful IF you are using 02 sensors, as the oil mix will damage them....
I also did the same thing on a high compression sportster by using a Kerosene mix..
I took along a pint bottle of it incase of low octane problem..
signed....REDHEAD
I also did the same thing on a high compression sportster by using a Kerosene mix..
I took along a pint bottle of it incase of low octane problem..
signed....REDHEAD
Thread Starter
|
Road Captain
Joined: Aug 2008
Posts: 559
Likes: 0
From: Berwick, Pa.
REDHEAD Thanks. On another thread the fellow mentioned the 10% ethanol will be increasing to 15%. At 10% I can feel the difference. What I am asking is for are recomended ,easily obtainable, fuel additives that will boost octane and help with preformance.
Seasoned HDF Member
Joined: Feb 2008
Posts: 34,654
Likes: 36,249
From: outskirts of ba habba
Take a stroll through the Wally-World stores and automotive
parts stores and see whats on their shelves....
I'm sure someone makes an octane booster to fill your needs...
Any 'indy' shops around your area to ask a mechanic ??
parts stores and see whats on their shelves....
I'm sure someone makes an octane booster to fill your needs...
Any 'indy' shops around your area to ask a mechanic ??
Road Master
Joined: Nov 2009
Posts: 997
Likes: 3
From: Charlotte, N.C.
The best way to protect the engine and help it run better on 15% eth is to get a tune or you can just let the O2 sensors do their job. Ethanol produces less btu's when you burn it. So instead of having 100% gasoline which the 14.7:1 A/F ratio is based on, you are combining it with the thinner alcohol mix that has a 7:1 A/F ratio. This means you need twice as much Ethanol when compared to gasoline to get the same burn. So just enrichen the A/F ratio and you will not have to worry about adding anything to the fuel. 13.6:1 A/F ratio will more than make up for the difference this is about what i am running at cruse and I have cooler engine temps and more throttle response.
Last edited by fireaxxe; Jan 22, 2011 at 11:43 AM.
Road Captain
Joined: Feb 2008
Posts: 507
Likes: 1
From: Portland, OR
The best way to protect the engine and help it run better on 15% eth is to get a tune or you can just let the O2 sensors do their job. Ethanol produces less btu's when you burn it. So instead of having 100% gasoline which the 14.7:1 A/F ratio is based on, you are combining it with the thinner alcohol mix that has a 7:1 A/F ratio. This means you need twice as much Ethanol when compared to gasoline to get the same burn. So just enrichen the A/F ratio and you will not have to worry about adding anything to the fuel. 13.6:1 A/F ratio will more than make up for the difference this is about what i am running at cruse and I have cooler engine temps and more throttle response.
As you indicate, ethanol has no direct affect on octane, after all ethanol has a higher octane rating than petrol because it burns cooler. But does change effective afr which can cause lean conditions. Could correct by increasing octane, but better to tune.
Trending Topics
Cruiser
Joined: Dec 2010
Posts: 158
Likes: 1
From: Ky
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
Cruiser
Joined: Sep 2010
Posts: 112
Likes: 0
From: Southern Tier NY
Another Startron user here --- use it in all my vehicles ---- buy it by the quart as the directions indicate the quart size is a more concentrated solution so you only need to use 1 oz per 16 gals of gas.