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Octane Booster

Discussion in 'Motorcycle Tech Talk' started by RKBud, Aug 31, 2008.

  1. FLHTbiker

    FLHTbiker Moderator Staff Member

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    DKIN21, is the PCIII working out with the SE 110 motor. I had a 07 SE Ultra and we were having so many problems with the motor that we sold it.

    I'm considering either the PCIII or the Harley Race Tuner for the 09 Ultra but not sure which route I want to take yet. I've had the Race Tuner on other bikes and sometimes feel its to much of a Harley only tuner which limits what can be done.
  2. Sleepy

    Sleepy Well-Known Member

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    Buddy, I'm sorry to hear about your friend too much of that stuff happening. Things are getting so stupid this way with the cars that I don't ride around in town any more..just take the car. When I'm on the bike I'm getting out of town. Marc, you sure have had some tough luck with the bikes. The '09's are sweet. I had bought the extended warranty for my '04 and wound up getting the cam chain tensioners changed out before things got too bad..other than that it's been a great bike..best yet..[for issues] I still have a soft spot for the FXRS-Sp I had though. As far as gas goes I use premium mostly, I have the 95 inch big bore, stock cams stock exhaust SE air cleaner. If it's cool outside and I'm not pulling the trailer I can get by with regular with no pinging.
  3. FLHTbiker

    FLHTbiker Moderator Staff Member

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    Bob, the 09 bike has got to be the best handling and running (so far) Harley I've owned. I've only replaced the pipes on the bike with a set of V&H ovals (they sound very nice), even the air cleaner is still stock. The bike seems to have a lot of good power as it is and not really sure it needs anything else. I loved the look and paint on the 07 SE but to many issues with the motor and when I sold it I didn't even look back. The Harley dealer is having its annual HOG appreciation night on Sunday and are giving 25% off so I'm sure a few chrome pieces will get added on to help dress it up.
  4. 1JITSU1

    1JITSU1 New Member

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    I always keep a can of seafoam on the bike
    had some bad experience with gasstation :wtf:
    1JITSU1
  5. DKIN21

    DKIN21 New Member

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    I have had no problems with the PCIII at all, I had it installed when i put the V&H Big Shots on and have since removed the SE air filter and added the Arlen Ness Big Sucker, and removed the baffells that came in the Big Shots and now running Big City Thunder QC baffells and have never taken it back to be remapped, Its running just a bit on the rich side, hurt the gas mileage a little, but it cooled the bike down some.
  6. FLHTbiker

    FLHTbiker Moderator Staff Member

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    I checked with my dealer and they want $150.00 just to down load a program that they have already on file for the 09 with Vance and Hines Ovals. Probably charge me another $100 or more for the labor to.
  7. skull2007

    skull2007 Active Member

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    your better offf getting a pciii or some type of fuel management you can fine tune and adjust to your own riding syle. those down loads are one of the biggest fluck jobs HD has to offer:devil:
  8. DKIN21

    DKIN21 New Member

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    I agree with SKULL, What they are talking about for 150.00 is to down load a program into your bikes puter, their program may have worked on another bike but may not work on yours. Its a lot cheaper going that way but may cause a lot of problems, or at least thats what i have been told. I had the dealer install the PCIII, Then they tuned it on the Dyno, so it has its own settings. Just make sure the Tech is good at whatever fuel management system you decide on, some like and are better with the PCIII and some like and are better with the SERT. Another one you might want to look at is the V&H Fuel Pak, You install and put the numbers in yourself from a list that comes with it, I ran one for a couple months but did not like thats when i went with the PCIII, One of the guys i ride with installed the FP on his and has had no problems, He is riding a 06 Wide Glide with V&H Big Radius.
  9. FLHTbiker

    FLHTbiker Moderator Staff Member

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    I won't let these guys put it on their Dyno ever again, they want $475.00 to Dyno it and to me that is stretching it a bit to far. It's a good dealership but at times they definitely are a stealership.
  10. Sleepy

    Sleepy Well-Known Member

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    I did the download when I went with the stage one big bore a few years back and aside from changing the fluids and tightening the odd bolt or two...[not including the work they did changing out the cam chain tensioners...and bearings under the extended warranty] the bike's run great. I didn't put it on the dynothen , still haven't..no need to.
  11. Harleyjeff

    Harleyjeff New Member

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    FLHTbiker - You made me dig out my owner's manual and look at what HD recommends. My 98 FLHTCI manual recommends at least 87. When I hear pinging (usually summer months) I will fill with 89 but never 92. Does your manual really indicate to use 92? Just curious if things have changed since 1998 with respect to recommended fuel fill.
  12. FLHTbiker

    FLHTbiker Moderator Staff Member

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    My manual recommends 92
  13. hotroadking

    hotroadking Super Moderator Staff Member

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    My bike holds 5 gallons of fuel
    Regular unleaded is $2.00 here
    Super is $2.30

    Total cost extra to put super in a complete fill up $1.50

    I the cost of the octane increaser is over a buck fiddy then you are wasting money.

    Personally I wouldn't want to save a buck fifty and risk detonation in an air cooled hot vtwin motor that costs $5K to replace.

    Thats 3333 full tanks of gas to make up $5K
    at 40 MPG that's 666,600 miles.

    I doubt I'll ride that far on one bike over my lifetime..
  14. DKIN21

    DKIN21 New Member

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    My 07 recommends 92 as well
  15. gabby

    gabby New Member

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    boost

    i'm a little confused.( a little?!!!) my friends have put 89 octane in their bikes and not complained. i know they would not chance hurting their bikes. well, maybe Rabbit. he's a gear head. anyway, my bike is a 2000 fxstb. i bought it with a 107 screaming eagle engine. it has an s&s carb, i don't know what cams, and i put 2.25 in. upswept drag pipes on it. it not only needs high octane, but very good high octane. i can't get consistant quality. in 93 or 89 octane with boost. it is a bitch to get some good fuel and have my bike run GREAT, then get some watered down crap and be embarassed when it grinds the starter to pieces, trying to start. my opinion is leave'em stock and run 92 octane.:banghead:
  16. hotroadking

    hotroadking Super Moderator Staff Member

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    Do you have compression releases on the 107?

    Have you done a compression test on each cyl and if not do you know how?

    High pressure in the cyl can make cold starts fine and then hot starts a PIA

    If you don't have one rent one or buy one at a parts store not that expensive

    With the AC cover and cleaner off
    Engine Cold
    Fuel off
    Remove plugs
    Install comp tester in one cyl
    Slowly open throttle 100% or have friend do it for you anad hold open
    Press starter button - rotate engine 3 or 4 times until you get the final reading.
    Do same for other cyl

    High pressures (190 plus) will cause hot starting as the fuel lights off from the hot dome on the piston, such as stopping for gas on a warm day, you go to fire and the engine kicks back like a hammer

    Compression releases are your only solution.

    However to make it easier on the starter on hot restarts.

    1) DO NOT twist the throttle before starting hot, this adds fuel which onlyl serves to increase the fuel to pre-ignite
    2) Just bump the starter until you hear a whoosh out the carb, this means you're good to go
    3) pop the starter like normal but leave the throttle alone don't twist it.

    Bike should fire right up.

    Also you might consider SNS travel limiters in the lifters, keeps lifters from bleeding down, you might have one bleeding enough that it closes a valve and that leaves you with a closed cyl when it should have an open valve increasing cranking pressures.

    I doubt it's only low octaine fuel it's more than likely one or all of the above.... and the higher test super clean octane has a higher flash point (burns slower later) so it seems to help the situation... really only covers it up...
  17. gabby

    gabby New Member

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    hot starts

    thanks hotrodking, my bike does have comp. releases. but i needed the extra advice on starts.i have a tester, just haven't tried a reading. the plugs look the same and a light brown. it seems if i get bad gas, they get a darker brown and a HEAVY coating. like rust. when all is good, the bike will fire just about as quick as you hit the button. if not ,it's bad. i'll try a comp. test just to be sure. again, thanks for the info. gabby:)
  18. hotroadking

    hotroadking Super Moderator Staff Member

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    Won't hurt and do a leakdown test as well.

    If you have a lifter bleeding down, it doesnt take much for it to close a valve if the engine is in the right position.

    I use SNS travel limiters in my lifters on high lift high comp builds, don't want them bleeding all the way down.
  19. gabby

    gabby New Member

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    sns

    hotroadking, i'm not , duh, wtf is sns?!!! is this something i can do easily? you know, pull the push rods, maybe the lifter blocks. what am i looking at in cost? who offers them? ok, i'm starting to freak. i've been out of touch for awhile. the last time i really wrenched on harley's, i swore i'd never own an 80 inch unless i stroked my 74. i timed my bike with a set of feeler gauges and a rolling paper. you could put a belt drive and clutches on for 4 or 5 hundred. 2 inches was wide. old ,ain't i. anyway, help would be GREAT. thanks gabby:cool:
  20. chucktx

    chucktx Moderator Staff Member

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