harley davidson Classic
what is the minimum octane that you can put in a 1999 harley davidson ultra classic?
My answer to a similar question.........
You CAN run 87...minimum recommended is 89...but BEST is 91 or 92. Gas is NOT ..THAT expensive for 5 gallons...run PREMIUM for best performance....ALWAYS!!!
EDIT: being an Ultra, I ASSUME it's injected.....PREMIUM gas has added detergents that cheap gas simply doesn't have that helps keep the injectors clean and open. Being an Ultra, it will run hotter than the other models from HD, the higher octane will help in pre-ignition and detonation under high heat conditions.
Like I said above, you CAN get away with 89, but even HD tells you in the OWNERS MANUAL to run a minimum of 91........read the bottom of the page on this link.......
http://www.harley-davidson.com/wcm/Content/Pages/Specs/full_specs/full_specs_09_popup.jsp?locale=en_US&dwp=&market=US&model=fxdl
HERE IS SOME INFO ON OCTANE.........
Best Answer - Chosen by Asker
TRUE octane booster is no longer available....thanks to the EPA. If it is, I haven't seen it in over 15 years, I would not know where to find it.
There are, however other boosters on the market that "increase your octane". To use it, just following the mixing instructions on the container.
Octane controls the compressability of gas.
The higher the compression ratio of an engine is, the higher it's fuel's octane rating must be. Let's say an engine with 8.5:1 compression requires an octane rating of 89, if you run 87, it may pre-ignite causing pinging. You can run 92 octane with no harm at all, but it would be a waste of money, because the compression is low enough to run on 89. If you have an engine with 10.5:1 compression, you need a minimum octane of 92, anything lower would cause it to pre-ignite and ping.
If you are experiencing pinging running the vehicle manufacturers specified octane rating, you most likely have an intake and/or exhaust leaking, incorrectly jetted carb or incorrect fuel injection settings incorrect ignition timing.
A very common misconception that can be proven on the dyno, is people running aviation fuel in their cars for the added octane, this is actually detremental to your engine, there are additives in av-gas that can corrode an automotive fuel system and the viscosity of av-gas is different than that of auto fuel...it is designed for higher altitudes.
Another misconception is people running high octane racing fuel in their normal cars, they THINK it's the octane that SLIGHTLY helps their performance...it's not, it other additives in the gas that provide at quicker, hotter, more powerful burn, causing higher combustion pressure than standard gasoline, but this can also damage a normal engine due to the extreme heat racing fuel creates.
Rating gasoline
Gasoline is primarily a mixture of two volatile liquids, heptane and isooctane. Pure heptane, a lighter fuel, burns so quickly that it produces a great amount of knocking in an engine. Pure isooctane evaporates slowly and produces virtually no knocking. The ratio of heptane to isooctane is measured by the octane rating. The greater the percentage of isooctane, the less knocking and the higher the octane rating. For example, an octane rating of 87 is comparable to a mixture of 87% isooctane and 13% heptane.
EDIT!!!!!!:
SLIMCOLO........are you smokin' CRACK or what???
110 octane????.......that's is RACING FUEL!!!!........
and........
89 is PREMIUM???????......WHAT???????
89 is MID-grade........91-94 is PREMIUM!!!!!!.......
Where do you live that 85 is regular and 89 is premium.....
if your owners manual manual says to run 110 octane in your bagger..........that manual and you must be from Seinfeld's Bizzaro World.......the HD Owners' Manual CLEARLY states to run 91 octane........once again......110 is racing fuel.
 |
 |
HARLEY DAVIDSON ROAD CLASSIC EYEWEAR 98828-05V LENS NEW |  |
 |
US $69.95 | 3d 15h 19m |
 |
Saddlebag Insert Kit for HARLEY HERITAGE CLASSIC FLSTC | |
|
US $47.95 | 1d 6h 14m |
 |
2007 Harley-Davidson FLHTCU Ultra Classic Electra Glide | |
|
US $74.99 | 1d 13h 48m |
 |
2008 Harley-Davidson FLHTCU UItra Classic Electra Glide | |
|
US $79.99 | 12d 13h 11m |
 |
HARLEY DAVIDSON MENS CLASSIC FLEECE VEST 98430-09VM L | |
|
US $49.95 | 11d 7h 2m |
 |
HARLEY MENS CLASSIC CRUISER RAIN JACKET 98245-09VM 2XL | |
|
US $115.95 | 12d 10h 22m |
 |
HARLEY WOMENS CLASSIC GAUNTLET GLOVES 98229-10VW NEW | |
|
US $54.95 | 8d 10h 24m |
|
HARLEY WOMENS CLASSIC GAUNTLET GLOVES 98229-10VW NEW | |
|
US $54.95 | 8d 10h 24m |
 |
HARLEY DAVIDSON MENS CLASSIC FLEECE VEST 98430-09VM XL | |
|
US $49.95 | 11d 6h 58m |
 |
HARLEY MENS CLASSIC CRUISER RAIN JACKET 98245-09VM M | |
|
US $105.95 | 12d 10h 20m |
 |
HARLEY DAVIDSON CLASSIC CRUISER MENS LEATHER JACKET L | |
|
US $359.95 | 18d 14h 7m |
 |
2007 Harley-Davidson FLHRC Road King Classic in White | |
|
US $79.99 | 16d 7h 48m |
 |
HARLEY DAVIDSON FENDER EMBLEM *ULTRA CLASSIC* 1 PAIR | |
|
US $34.99 | 1d 14h 59m |
 |
HARLEY MENS CLASSIC CRUISER RAIN PANT 98246-09VM L | |
|
US $54.95 | 20d 16h 10m |
 |
HARLEY CLASSIC CRUISER LEATHER JACKET 98140-10VM 2XL | |
|
US $379.95 | 5d 17h 43m |
 |
Harley-Davidson FLSTC Heritage Softail Classic in Crims | |
|
US $99.99 | 9d 4h 26m |
 |
Graphic for Harley Electra Glide Standard,Ultra Classic | |
|
US $39.00 | 26d 17h 28m |
 |
Harley-Davidson® Ultra Classic® Electra Diecast 81039 | |
|
US $49.99 | 11d 10h 49m |
 |
44117-07A HARLEY DAVIDSON Classic Chrome Front Axle Nut | |
|
US $26.95 | 7d 11h 2m |
 |
Harley MENS Classic Fleece Orange Jacket 98425-09VM M | |
|
US $75.65 | 2d 7h 21m |
 |
Harley Davidson Classic Cruiser Mesh Jacket 98248-09VM | |
|
US $160.95 | 21d 8h 53m |
|
Harley Davidson Classic Cruiser Mesh Jacket 98248-09VM | |
|
US $160.95 | 21d 8h 53m |
 |
Harley Ultra Classic Chrome Tour Pack Trim kit | |
|
US $11.95 | 23d 10h 55m |
 |
Classic 1983 Harley Racing Poster Randy Goss Flat track | |
|
US $14.95 | 11d 15h 15m |
 |
2009 Harley Davidson FLHRC Road King Classic Turquoise | |
|
US $149.99 | 26d 16h 13m |
 |
2009 Harley Davidson FLHRC Road King Classic Vivi Black | |
|
US $69.99 | 26d 16h 19m |
 |
2009 Harley Davidson FLHTCU Ultra Classic Electra Glide | |
|
US $149.99 | 26d 16h 36m |
 |
7pc Harley Davidson Classic Car Floor Mat Seat Covers | |
|
US $86.00 | 13d 11h 27m |
 |
Harley Davidson 2010 TRI GLIDE ULTRA CLASSIC BROCHURE | |
|
US $14.99 | 18d 4h 41m |
 |
WWE Classic Superstars Series 7 Harley Race Figure | |
|
US $39.99 | 14d 9h 12m |
 |
2006 Harley Road King, Road King Classic Manual on CD | |
|
US $8.99 | 21d 15h 21m |
 |
Harley Davidson Classic Cruiser Rain Jacket 98245-09VM | |
|
US $104.95 | 9d 17h 55m |
 |
HARLEY MENS CLASSIC CRUISER RAIN JACKET RAIN GEAR BIKER | |
|
US $100.00 | 21d 4h 48m |
|
Harley Davidson Classic Cruiser Mesh Jacket 98248-09VM | |
|
US $169.95 | 21d 8h 53m |
 |
HARLEY-DAVIDSON® WOMENS CLASSIC TANK TOP 99118-10VW | |
|
US $18.00 | 17d 13h 10m |
 |
Chicago Cubs Harley-Davidson® Ultra Classic Electra | |
|
US $49.99 | 2d 9h 8m |
 |
HARLEY MENS CLASSIC BLACK FLEECE JACKET HD H-D XL TALL | |
|
US $99.95 | 23d 9h 53m |
 |
Hidden Antenna Harley FLHX FLHT FLTR Ultra Classic -WB | |
|
US $21.95 | 22d 1h 45m |
 |
Harley-Davidson® FLSTC Heritage Softail® Classic 81073 | |
|
US $69.99 | 13d 16h 1m |
 |
2008 Harley-Davidson FLHRC Road King Classic in Crimson | |
|
US $69.99 | 18d 7h 8m |
 |
New York Yankees Harley-Davidson® Ultra Classic Electra | |
|
US $49.99 | 24d 14h 29m |
 |
Harley-Davidson® Ultra Classic® Electra Diecast 81010 | |
|
US $49.99 | 14d 13h 23m |
 |
Harley-Davidson Men's Classic Boot Cut Jeans 99027-09VM | |
|
US $39.00 | 4d 9h 41m |
 |
HARLEY DAVIDSON Zippo Lighter Official BLACK CLASSIC | |
|
US $15.99 | 4d 11h 9m |
 |
HARLEY DAVIDSON CHROME TOUR PACK LATCH LATCHES CLASSIC | |
|
US $29.95 | 6d 5h 19m |
| Powered by phpBay Pro |
 |
Classic 33 Single Large Flame Decal Cover Kit red, orange, and yellow with blue trim, designed to fit all KitchenAid stand mixers, including Artisan, Ultra Power, 4, 5, 6 qt quart mixers, without accessory interference. List Price: $29.99 Sale Price: $15.99 Average Rating:   |
|
With Hot Rod flames on your mixer, it gets tons of attention like your mixer should! Notice the nice color bleed, the pin stripping, and smell of envy it creates! Actual color bleeds and pin striping will be similar, but each is one of a kind due to printing variations... |
 |
Harley Davidson Motorcycles - Bed In A Bag Set - Twin Size Bedding Sale Price: $87.99 |
|
Pattern: Harley Davidson Classic. Genuine licensed merchandise. Machine washable. One twin size comforter 66 x 86 in. (167 cm x 218 cm). One twin flat bed sheet, finished size 66 x 96 inches (168 x 244 cm)... |
 |
Harley-Davidson® Classic Models Pin-Up Girl Sign List Price: $19.99 Sale Price: $16.99 |
|
Heat things up in your game room, garage or business with the Harley-Davidson® Classic Models Babe Tin Sign.
|
 |
Born to Be Bad Vol. 3 The Best of Blues-Rock (Time-Life Compilation) Sale Price: $49.95 |
|
This compilation was released in 2003 by Time-Life Music. It has 18 songs on it by various artists. Please see the photo of the back insert for a list of tracks. |
 |
iPod Zune or MP3 Aux Auxiliary Stereo Car Radio Input Jack Audio Cable for Harley Davidson Electra Glide, Road Glide, Ultra Classic, Road King Sale Price: $3.99 |
|
This cable is 6' and is BRAND NEW. Guaranteed to work for any industry standard 3.5mm to 3.5mm standard mini jack. *Specs* Premium Plated, black cable, 6 feet cable. 3.5mm cable, for iPods, Zunes, Sansa and most MP3... |
 |
Harley-Davidson and Indian Wars (Motorbooks Classics) List Price: $24.95 Sale Price: $59.99 Used From: $12.50 Average Rating: |
|
This colorful reprint examines the dueling marques right up through Indians dissolution in the 1950s. |
 |
Harley-Davidson Classics 1903-1965: Illustrated Buyers Guide List Price: $17.95 Sale Price: $49.99 Used From: $22.99 Average Rating: |
 |
Harley-Davidson Electra Glide (Osprey Classic Motorcycles) List Price: $15.95 Sale Price: $25.00 Used From: $2.02 Average Rating:  |
 |
Harley Davidson - 2000 FLSTF Fat Boy Sale Price: $11.98 Average Rating: |
|
This officially licensed Harley Davidson motorcycle is sure to inspire a passion for the open road with kids of all ages. |
 |
Harley Davidson - 2007 XL1200N Nightster Sale Price: $11.98 |
|
This popular officially licensed Harley Davidson motorcycle is sure to inspire a passion for the open road for all ages. |
 |
Harley Davidson - 2005 FLHTCUI Ultra Classic Electra Glide Sale Price: $11.98 |
|
This officially licensed Harley Davidson motorcycle is sure to inspire a passion for the open road with kids of all ages. |
 |
MOTORCYCLE CURVED VERTICAL SIDE MOUNT LICENSE PLATE TAG HOLDER BRACKET FITS ALL SPORT BIKES AND CRUISERS. HARLEY DAVIDSON, KAWASAKI, HONDA, YAMAHA, SUZUKI List Price: $98.99 Sale Price: $24.99 |
|
Specifications: Vertical curved license plate bracket is CNC machined from medium gauge steel, then black anodized for a long lasting finish. Makes your bike look a lot cleaner and unique. Very easy to install... |
 |
Universal Car Motorcycle LED License Plate Holder Light fits roll pan Will fit: Suzuki, Honda, Yamaha, Kawasaki, Ducati, Harley Davidson, jeep, cars truck List Price: $19.99 Sale Price: $8.99 |
|
Enhance the look with these LED License Plate Light Easy installation. Direct Bolt-on. Condition: Brand New in original packaging Quantity: 1 x LED bar LED Color: White Universal Fitment: Honda (All Models & Years) Kawasaki (All Models & Years) Suzuki (All Models & Years) Yamaha (All Models & Years) Cruisers, Harleys, ATV's Ultra bright white LED light 100,000+ Hour Lifespan 12 Volts or 24 Volts |
 |
Side Mounted License Plate Assembly with Integrated LED Taillight and Brake Light and License Plate Light Enhance you Bike, Chopper, Cruiser with this Side Mounted LED License Plate Taillight Harley Davidsons, Suzuki, Honda, Kawasaki, Yamaha Cruisers List Price: $82.48 Sale Price: $49.99 |
|
Specifications: Enhance the look with these Side Mounted LED License Plate Tail Light Stop and tail light (ie leds get brighter when brakes applied) Condition: Brand New Quantity: 1 Lense Color: Clear Fitment: This is a custom product that will fit on all applications Harley Sportster, VRODS, FXR, DYNA Series Cruisers Choppers Honda (All Models & Years) Kawasaki (All Models & Years) Suzuki (All Models & Years) Yamaha (All Models & Years) Scooters (All Makes & Models) |
2007 HARLEY DAVIDSON ULTRA CLASSIC
Harley Road King Classic 2001 exhaust trooble shooting?
I have a Harley Davidson Road King classic 2001 that it has Magneti-Marelli FI. Only mods. are screaming eagle slip on mufflers, Arlen Ness big sucker2 air cleaner kit, and Arlen Ness big shot fuel tuner. I programed the tuner, seems to run best on the preset map settings already loaded. However, when I accelerate hard then let off and let motor idle down, every so often the exhaust pops. It is a loud pop, not the normal kackle. It is not a cough or sneeze through the breather. What could be causing this? I have tried the program in several modes but they all do this. Have also tried less fuel. I do not have an exhaust leek.
ACTUALLY.......exhaust backfire on decel can be caused by lean OR rich!!!!....USUALLY on injection, it's caused by rich (too much gas at 0% throttle position) , carbs by rich also ( high manifold vacuum pulling too much fuel through the idle ports), although, too lean can cause this also (lean mis-fire leading to raw fuel through the exhaust that get ignited by internal pipe heat and cold air from exhaust reversion hitting each other), it has alot to to with the total engine combination, exhaust length and diameter and cam overlap and igniton timing.
I don't mean to sound insulting, but you WASTED your money on the Ness Fuel controller, you SHOULD have gotten a Power Commander....ALWAYS go with products from a campany that SPECIALIZES in what they sell!!!....Power Commander III USB with Acellerator Pump Feature is the industry standard (for almost everything except HD Delphi, PC 5 with wide band O2 sensors for Delphi), even better, is HD's Super Tuner (for the newer Delphi System). With a Power Commander and a DYNO, you can dial in the injection PERFECTLY....with your situation, lean out the air/fuel ratio at 0% throttle from 1000-3000 rpm (approx, each engine is individual).
The best thing I can tell you to try is to lean out the LOW RANGE one step at a time until the exhausti popping stops. If it won't stop by leaning it out, you may have the rare case of actually being too lean as Adam said, try richening one step at a time....but I will lay odds on the fact that you are actually rich....HD's Super Tuner has a feature to lean out the a/f ratio at an already predetermined rpm range and throttle position, on the Power Commander, you have to manually change each cell of the map individually.
ALSO....EXTREMELY IMPORTANT!!!!........
In order for ANY adjustments to be CORRECT, you will HAVE to verify not only no exhuast leaks( as you state you don't have), you MUST verify no INTAKE leaks...AND....you MUST have the THROTTLE POSITION SENSOR "ZEROED"!!!!!!!......unfortunately HD is the best place for the TPS....they can do it in a matter of a few minutes....it REQUIRES special equipment.