Question for slip ons and EFI

Discussion in 'Sportster Models' started by Bull Hog Grande, Jun 22, 2007.

  1. Bull Hog Grande

    Bull Hog Grande Member

    18
    11
    0
    Guys,
    If I install a pair of slip ons, do I need to put a new air filter in and have the EFI remapped? If it is just installing the slip ons, I can do it, but I don't knwo how to reprogram the brain. Any help would be greatly appreciated.
    Tom
     
  2. glider

    glider Veteran Member

    25,464
    108
    43
    Tom

    A lot of people just install the slip on's and ride. Considering that these newer bikes (you didn't say what year you have) are running very lean out of the factory, I would advise some sort of fuel management like a TFI, PC III or the like and richen things up a bit. If you add the stage 1 intake with a K&N filter, you will pick up about 8 - 10 HP and tq also, well worth the money. The motor will run cooler and better also besides the extra power.

    If you have a newer bike, the TFI is a plug and play operation that most anyone can do. I run one on my RK and it works well.

    http://www.dobeckperformance.com/

    I also have a brand new TFI in the package if anyone is interested that fits all 07 bikes except sportster and v rods.
    It's the 1250ST.
     
  3. Bull Hog Grande

    Bull Hog Grande Member

    18
    11
    0
    Glider,
    I have a 2007 1200N. I think I am going to have to wait till next year to do this as I am looking at some money. How much are the PCFIII? Do you have to hook your computer up to it? Sorry for being ignorant this is my first harley.
    Tom
    ps-Thanks for your help.
     
  4. H2oBear53

    H2oBear53 Member

    15
    11
    0
    On my 2007 EFI..... you can put slip-ons .. on and be ok. If you do both you have to get a ECM calibration. Went thru this.
     
  5. glider

    glider Veteran Member

    25,464
    108
    43
    Even with just slip ons, it's marginal with the lean mapping in the new bikes.
     
  6. tsp45acp

    tsp45acp Active Member

    296
    26
    0
    I asked some of these questions in my "Louder Pipes" thread, But what I didn't ask was :

    Ball park figure ($$$) for slip ons, TFI & K&N A/C? Thanks, Tracy
     
  7. glider

    glider Veteran Member

    25,464
    108
    43

    $800 :D
     
  8. 67hat34c

    67hat34c Active Member

    297
    26
    0
    I had dealer install v&h slipons and HD Stage one breather and they did the performance down load. I got this before I ever started the bike. Hind site I should have done all labor myself and purchesed one of the SERT or an aftermarked one.

    Either way you should do the breather and download if you change the pipes.

    I estimate that I increased hp and torque by about 20%. One day I will do a Dyno run and post the results.

    08 1200c
     
  9. artisan

    artisan Active Member

    108
    26
    1
    i put the SE street performance slipons on to my otherwise stock nighty & she runs just fine.
    mind the pipes do have propper baffles in them,they sound great though & they're not "too" loud ,i don't like my bikes too loud though.