Who's online: scottyH, fat55, Colin, blueystar, Fatboy80, sherpa, John.R, Guests: 147
2/2
  • tussuck Posts: 2307
    Melbourne
    Motor Head tussuck
    12 Nov 2019 01:07 PM
    So whats the CR?  Is it 9.75:1 or 10.25:1?  (whats the 'corrected' mean in the CR ratios provided)
    I ask because that cam is a about a 10:1 stage 1 cam best suited for Stock compression.  
    And should'nt that setup be making 95ish HP?
  • night_prowler Posts: 30
    Northern NSW
    Stock Poster night_prowler
    13 Nov 2019 06:25 PM
    Hey Tussack, check this out, keeping in mind this is before the recent dyno tune. 

    0EE587D3-36C2-4E03-808E-79A7261ABEF1.jpeg

    And Kinkade, it’s got a 58t rear, gotta check the front, but the guys reckon it’s geared pretty short, it feels like it accelerates pretty quick but really I don’t have anything to go by because I’ve never ridden stock gearing on a sportster bar a quick test ride around Springwood on a forty eight last year but it to me it feels tall, it’ll hum along nicely at about 130-140 no worries. 

    Between the 570 jackhammer cam and the gearing it feels like it wants to be up in the mid to high rpms but I still don’t think it should be pinging like it does in the heat. Ive had a few people say “sportsters need to be revved! Don’t try and ride it like a big twin!” but i utilise the RPM’s and always try keep it in the fat part of the torque. 
  • night_prowler Posts: 30
    Northern NSW
    Stock Poster night_prowler
    24 Nov 2019 10:36 AM
    For all ye who may be interested; 

    Another dyno run done last week, they adjusted the timing by 2 degrees and it is absolutely flying, rides amazingly and zero pinging even in the Gold Coast traffic at about 35 degrees splitting through the traffic at a snails pace. 

    They uncovered some more fuckery with my real wheel though so the drama continues. Treating it more as a project now, I seem to uncover new problems on a weekly basis. 
  • night_prowler Posts: 30
    Northern NSW
    Stock Poster night_prowler
    24 Nov 2019 10:39 AM
    The almighty dyno sheet; 

    A85F1BB6-BCDE-4F5B-8D9A-7FDEE6F73D19.png


  • tussuck Posts: 2307
    Melbourne
    Motor Head tussuck
    24 Nov 2019 05:03 PM
    amazing what a tweak to timing does.
2/2
© 2020 - 1.0.4.2