The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Intake and Exhaust > Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

Active Threads
0 Show your favorite pic of your bike. just one
Last Post: Lone Rider
Posted On: 1 Minute Ago
Replies: 4,724
Views: 1,801,863
0 Turn signals and switch required 1972 xlch
Last Post: Lone Rider
Posted On: 6 Minutes Ago
Replies: 5
Views: 191
0 Crank Assembly problem or Cams Knocking????
Last Post: acable23
Posted On: 7 Minutes Ago
Replies: 19
Views: 528
0 Morris mag wheel question
Last Post: USAFpj
Posted On: 16 Minutes Ago
Replies: 9
Views: 2,560
0 Fuel pump replacement
Last Post: nativebroncofan
Posted On: 18 Minutes Ago
Replies: 6
Views: 24
0 Longtime XL owner, 1st time forum joiner
Last Post: Folkie
Posted On: 24 Minutes Ago
Replies: 4
Views: 24
0 Hey, new guy from Detroit
Last Post: Folkie
Posted On: 27 Minutes Ago
Replies: 12
Views: 342
0 28 years later..
Last Post: USAFpj
Posted On: 40 Minutes Ago
Replies: 40
Views: 1,717
0 How to eliminate TSM on 2000
Last Post: steveolds
Posted On: 50 Minutes Ago
Replies: 5
Views: 164
0 Clutch issues
Last Post: bassgrinder
Posted On: 1 Hour Ago
Replies: 12
Views: 296
0 Hottie of the day, no nudity.
Last Post: trainman
Posted On: 1 Hour Ago
Replies: 12,312
Views: 1,121,984
0 cscycle service Mt. Victory , Ohio
Last Post: Larry May
Posted On: 1 Hour Ago
Replies: 0
Views: 16
0 What did you do for your sporty Today?
Last Post: boomerguy
Posted On: 1 Hour Ago
Replies: 6,143
Views: 780,934
0 oil filter choices
Last Post: boomerguy
Posted On: 1 Hour Ago
Replies: 14
Views: 202
0 Primary will not seal
Last Post: dodgetrucken
Posted On: 1 Hour Ago
Replies: 16
Views: 331
0 Sportster Crankcase Pressure / Engine Breathing / Wetsumping and Mods
Last Post: bustert
Posted On: 1 Hour Ago
Replies: 113
Views: 3,659
0 Upcoming 1275 hammer upgrade carb choices
Last Post: 60Gunner
Posted On: 2 Hours Ago
Replies: 4
Views: 65
0 Oil cap problems - Bikers Choice 02-073
Last Post: dieselvette
Posted On: 2 Hours Ago
Replies: 21
Views: 775
0 Hello with new to me 60’ xlch
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 12
Views: 117
0 EFI hose clamps
Last Post: NGOT8R
Posted On: 2 Hours Ago
Replies: 18
Views: 589
0 New member 76 sportster
Last Post: jaa55
Posted On: 3 Hours Ago
Replies: 64
Views: 6,065
7 Hy from Austria
Last Post: heyshott 81
Posted On: 3 Hours Ago
Replies: 11
Views: 115
0 Leaking Head Gasket, Loose head bolts
Last Post: NGOT8R
Posted On: 3 Hours Ago
Replies: 4
Views: 108
0 Sportster. Xlh model. 1982
Last Post: heyshott 81
Posted On: 3 Hours Ago
Replies: 5
Views: 142
0 Front end swap
Last Post: stalkie
Posted On: 3 Hours Ago
Replies: 15
Views: 663
0 Fuel pump replacement
Last Post: nativebroncofan
Posted On: 3 Hours Ago
Replies: 0
Views: 28
7 Oldest Motorcycle You've Owned
Last Post: Highly-Dangerous
Posted On: 3 Hours Ago
Replies: 66
Views: 3,126
0 1986-90 Evo Sportsters: What every owner should know but were afraid to ask
Last Post: lehel
Posted On: 3 Hours Ago
Replies: 360
Views: 43,354
0 1975 XLCH1000 Splitting Cases
Last Post: Gold Member
Posted On: 4 Hours Ago
Replies: 7
Views: 188
0 Hot Chicks on Hot Bikes
Last Post: trainman
Posted On: 5 Hours Ago
Replies: 10,047
Views: 1,690,041
More...
Members Birthdays
View Poll Results: What grade gasoline do you use?
Premium Gas 91+ octane 3,691 81.99%
Mid-Grade Gas 89-90 octane 308 6.84%
Regular 87 octane 380 8.44%
I mix it up, don't care, etc. 104 2.31%
Change based on the weather 19 0.42%
Voters: 4502. You may not vote on this poll

Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #1761  
Old 6th June 2019
THEWILDONE THEWILDONE is offline
Biker
 
Join Date: Mar 2018
Posts: 80
Sportster/Buell Model: 1200 XLC
Sportster/Buell Year: 2003
Reputation: 10
THEWILDONE is an unknown quantity at this point
Default

Quote:
Originally Posted by 60Gunner View Post
Doesn't it require 91? Running a lower octane than required could cause detonation.
Dont need a dyno to prove known facts.
No it does not. Sticker right on the frame from HD specifies 87 octane.


I'm very familiar with avoiding detonation. In the world of boosted home-built-hotrods which utilize a stock bottom end, it only takes a little bit of detonation to bust a ring land.


A dyno would be a great tool for quantifying said "facts".
Reply With Quote
  #1762  
Old 6th June 2019
60Gunner's Avatar
60Gunner 60Gunner is offline
Chief of Security
 
Join Date: Sep 2017
Location: United States
Posts: 1,393
Sportster/Buell Model: 1200/1250C
Sportster/Buell Year: 05
Reputation: 1664624
60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute
Default

Quote:
Originally Posted by THEWILDONE View Post
No it does not. Sticker right on the frame from HD specifies 87 octane.


A dyno would be a great tool for quantifying said "facts".
If you feel it's necessary then fork out the money for one. As far as 'said facts', dont take my word for how the octane rating affects burns. It's common knowledge. Google it for f$%# sakes or ask the experts in the field. They'll tell ya the same damn thing. Otherwise keep throwing your $$$ down the proverbial sh!++er. No skin off my a$$.
Even with my build which requires a minimum of 91 is good on just that. I sure as hell won't be running 93 with 101 octane boost or fricken rocket fuel because I'm not naive enough to think a few more octane will make it run better or set the world on fire.
__________________
05 1200/1250C/Hammer 570 Cams/E1 clutch kit
TC88A Gunner's V00D00 map/DCPR7E/Taylor Pro 8mm
S&S Premium Lifters/KhromeWerks HP Plus 3" slip ons
HSR42 25 pilot 1 1/2 turns 97 needle 2nd groove 170 main
Dragtron II AC K&N filter/VR1 20W50/Spectro 85wt Primary Oil

Reply With Quote
  #1763  
Old 6th June 2019
THEWILDONE THEWILDONE is offline
Biker
 
Join Date: Mar 2018
Posts: 80
Sportster/Buell Model: 1200 XLC
Sportster/Buell Year: 2003
Reputation: 10
THEWILDONE is an unknown quantity at this point
Default

Quote:
Originally Posted by 60Gunner View Post
If you feel it's necessary then fork out the money for one. As far as 'said facts', dont take my word for how the octane rating affects burns. It's common knowledge. Google it for f$%# sakes or ask the experts in the field. They'll tell ya the same damn thing. Otherwise keep throwing your $$$ down the proverbial sh!++er. No skin off my a$$.
Even with my build which requires a minimum of 91 is good on just that. I sure as hell won't be running 93 with 101 octane boost or fricken rocket fuel because I'm not naive enough to think a few more octane will make it run better or set the world on fire.
Woah man, not sure why your panties are twisted and you're on the defensive??

And no, I am not forking out the money for dyno time. I do all my own stunts: street tuning, plug reading, WB02, datalogs etc. Now I sure wouldn't be OPPOSED to dyno time for the educational aspect but not going out of my way at this point.

All I was getting it was I personally am curious as to how much measurable difference it actually comes out to. Nothing more or less..

Run whatever gas you want, I definitely don't care
Reply With Quote
  #1764  
Old 6th June 2019
shanneba shanneba is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2013
Location: Franklin, Indiana
Posts: 1,791
Sportster/Buell Model: XL1200C
Sportster/Buell Year: 2013
Reputation: 2354006
shanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond reputeshanneba has a reputation beyond repute
Default

You could look at Sunoco Race gas tech information-

https://www.sunocoracefuels.com/tech.../beyond-octane

Beyond Octane
Overheard at the local track:

“High octane fuels burn slower.”
“My motor doesn’t need all that octane so that fuel won’t do me any good.”
“I need the highest octane so I can max out my timing.”

Unfortunately, those statements are not always true.

As a matter of fact, those statements only have some merit in the street gas world where 93 octane fuel is king and 87 is used by most.
__________________
2013 XL1200C

Find your Owner's Manual, Wiring Diagram and Parts List here :

https://serviceinfo.harley-davidson....cle/lookupForm
Enter your VIN OR
Use the search - enter year and model

If something doesn't work on your Sportster look here:
SportsterPedia.com
Reply With Quote
Sponsored Links
  #1765  
Old 6th June 2019
60Gunner's Avatar
60Gunner 60Gunner is offline
Chief of Security
 
Join Date: Sep 2017
Location: United States
Posts: 1,393
Sportster/Buell Model: 1200/1250C
Sportster/Buell Year: 05
Reputation: 1664624
60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute
Default

Quote:
Originally Posted by shanneba View Post
You could look at Sunoco Race gas tech information-

https://www.sunocoracefuels.com/tech.../beyond-octane

Beyond Octane
Overheard at the local track:

“High octane fuels burn slower.”
“My motor doesn’t need all that octane so that fuel won’t do me any good.”
“I need the highest octane so I can max out my timing.”

Unfortunately, those statements are not always true.

As a matter of fact, those statements only have some merit in the street gas world where 93 octane fuel is king and 87 is used by most.
I agree with what they're saying. But the assumption of those here that think higher octane = more power in and of itself is pure nonsense and can actually hurt performance in some cases. I have a choice here of 91 pure gas or 93 with ethanol. The 91 pure gas is a better option for my motor.
Reply With Quote
  #1766  
Old 7th June 2019
boomerguy boomerguy is offline
XL FORUM TEAM MEMBER
 
Join Date: May 2018
Posts: 263
Sportster/Buell Model: xl1200c
Sportster/Buell Year: 2003
Reputation: 519530
boomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond reputeboomerguy has a reputation beyond repute
Default

According to my 2005 owner's manual, the 883 engine requires 87 (91 RON) and the 1200 requires 91 (95 RON) because of the compression ratios.
I run 90 octane in my 883 because that is the only octane I can get my NON-ethanol gas in near home.
When I travel farther away and get the good stuff, I try to buy TOP TIER gas and I don't sweat the octane because I know I can run 87 or higher.
For me, NON-ethanol and TOP TIER take priority. If I had a 1200 engine, I would always stick with the 91 octane.
Reply With Quote
  #1767  
Old 9th June 2019
THEWILDONE THEWILDONE is offline
Biker
 
Join Date: Mar 2018
Posts: 80
Sportster/Buell Model: 1200 XLC
Sportster/Buell Year: 2003
Reputation: 10
THEWILDONE is an unknown quantity at this point
Default

Quote:
Originally Posted by 60Gunner View Post
I agree with what they're saying. But the assumption of those here that think higher octane = more power in and of itself is pure nonsense and can actually hurt performance in some cases. I have a choice here of 91 pure gas or 93 with ethanol. The 91 pure gas is a better option for my motor.

Gunner, I know you mentioned octane booster in your last post replying to me. Just for clarification in case I didn't explain myself well enough or you didn't understand me, when I said boosted, I was referring to forced induction, not octane booster. I should have worded myself more clearly. I only later realized this.

I agree with you though, lots of people seem to be running the expensive higher octane stuff in their bikes which don't need it. I used to run 91 in my '03 1200 before I learned that in the case of my bike at least, it doesn't need it. I first experimented with filling up with 87 and was paying attention to see if it would cause the engine to knock.... I then later discovered the sticker right on my frame from HD specifying 87.

I used to have a book written by David Vizard detailing building up high performance SBCs.. I haven't seen the book floating around in years, but I remember in there he talked about doing a compression test and running some simple math to determine what octane would be required. I wish I could find it because I'd love to revisit that section to learn some more about it. It would be cool to compare say, my '03 1200 to a later 1200 and run some actual math on the compression numbers, just for fun in terms of octane requirements.....
Reply With Quote
  #1768  
Old 12th June 2019
Renecito's Avatar
Renecito Renecito is offline
Biker
 
Join Date: May 2013
Posts: 32
Sportster/Buell Model: XLH883
Sportster/Buell Year: 1994
Reputation: 1660
Renecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura aboutRenecito has a spectacular aura about
Default

Got a stock '94 XLH883 Hugger named Azül. I use Premium Unleaded, cheaper stuff when I'm really broke! jaja!

He doesn't like premium Chevron gas specifically. Makes him sick and sputter and fart with all its additives if you can believe that. I know because every time I used Chevron, he gets sick until I ride out the gas and go put some Shell or something. I thought it was because I was using the "good" stuff with all its cleaners!

Runs fine on 87 octo but I had to add carb cleaner every once in a long while and was back on with no issues. Finally rebuilt the carb, added bigger jets (for a 1200) and modded it to drink heavier as well as modding the air intake to breathe better. Everything is basic OEM stock, I just did some DIY mods. Added a Pingel petcock/filter some time back as well.

Really jumps. Been using Premium Unleaded. Haven't had any issues at all. When I'm really broke, I use the cheap stuff, but mostly I'll drop in the Premium at the local watering hole (1 hose). I've learned that my horse, Azül, likes certain things and dislikes certain things and I don't go against it, just flow with it as long as it keeps me celebrating my freedom on the road.

I do change the plugs every few months. Does it have some carbon burn when I do? Yes. Will I need to clean the heads at some point? Yes. Like all motors, it will need its maintenance. Got my ride 6 years ago, rescued from sitting in a field with a tarp on it by some guy who cleaned it up just enough to sell it for the widow and take a cut. So I know my horse will need some love and I've learned to wrench it. You take my primary cover off and after washing out the oil, you can eat off that thing, clean and shiny on the inside.

Point is, I didn't know anything about "detonation" or things like that. I just listen to my horse and the sounds he makes when I use certain things. I use good high quality oils, and that goes with what I give him to drink. This is N. Texas so it's mostly hot, and the dang gas has ethanol in it.

Sorry for the dissertation! jaja! Was bored at work and was looking for a thread to amuse myself with and stumbled upon this one. Gave me something to think about and experiment with and consider that top end cleanup. Perhaps I will split the difference and play around with mid-grade octo, but usually anything termed mid-grade just gives me a bad taste, especially when it comes to my horse. jajaja!!!!

Ride safely, stay upright and between the pipes!


From my OEM Manual: FUEL: Use a good quality leaded or unleaded gasoline (87 pump octane or higher). Pump octane is the number shown on the gas pump.

From my Clymer 86-03 Service Manual:
Fuel Type: Unleaded
Octane:
1986-1990 models Pump research octane of 89 or higher
1991-2003 models Pump research octane of 87 or higher
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Sponsored Links
All times are GMT +1. The time now is 23:14.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC