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Viewing 7 posts - 1 through 7 (of 7 total)
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  • #17397

    Peter De Saegher
    Participant

    @ John Savage : Do you have plans to add this carb on the Jet tech software ?

    #17014

    Peter De Saegher
    Participant

    Hello Lee, for more than 2 years I have been working on 4 cilinders to found some HP. For the moment I have 33,8 hp on the wheels and a engine with a width power band. Engine has now 15 houres , no problem at all. It’s a real pleasure driving it.

    First of all ==> writing about HP is much easier than having them realy on a testbench. Believe me it’s a lot of trail and error. Bigger ports doesn’t always mean more power guys, it’s not that simple. I had more power with a smaller exhaust port than a bigger….. you don’t want to have all your fresh gases going without burning into your exhaust pipe and cool it down….

    The Krauss max doesn’t have a reliable image in europe and not very popular.
    The Polini kit has the same problem ( mine had 3h and boemmmmm :-(

    The DD2 cilinder or supermax only has high rpm output , I was not impressed because of the lack of bottom and middle power.

    What I have done :

    I have the ignition you have mentionned but directly from the OEM without rev limiter.
    Modified cilinder ( additional booster ports, modified A, B, C ports )
    Other cil head & piston
    other conrod
    balanced crank
    Handmade exhaust & muffler.

    I will try to post some pictures to make it more visuel.

    just a question : what’s the price of a Rotax max cilinder in your country ?

    #15488

    Peter De Saegher
    Participant

    The sensor 265560 is placed in the carter of the engine to mesure the crank revs , no oil there. Order part 431500.

    #15388

    Peter De Saegher
    Participant

    He told me that the pick up has an original spacer, he has added the same one. ( 2 in total ). Hope this will work for you.

    #15189

    Peter De Saegher
    Participant

    I will try to phone the guy next week and keep you informed.

    #15139

    Peter De Saegher
    Participant

    On the underside of the engine you have a sensor for your crankshaft rotation.
    Take it out, put an O ring spacer to have the sensor farther away from the crank.

    I’m not running DD2 but a tuned Senoir, one day I was next to a professional team in the pitlane, running DD2 , they had the same problem. They changed carb, wirings,ignition coil etc etc. Madness. Until the moment a technician from another team came in and he told them to place the o ring spacer.
    10 minutes later , problem solved.

    I hope this will work for you ….

    #15137

    Peter De Saegher
    Participant

    After houres of googeling I found this pictures,it’s not 100% the same but I’m on the right track now !
    Thanks for your answers

Viewing 7 posts - 1 through 7 (of 7 total)