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Thread: Rally 3 class

  1. #191
    Senior Member Mirek's Avatar
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    Quote Originally Posted by Rally Power View Post
    Come on mate, how can you believe that a 1.2L engine can match a 1.6L engine using the same restrictor? If engine capacity doesn't matter why don't we see manus building R5 cars with 1.2 or 1.3 engines?
    IMHO that's wrong and illogical comparison because R5 cars have larger restrictor for such cylinder capacity (21% larger). If they would run smaller restrictor it's possible the teams would select smaller engines because for every air quantity there is an ideal engine size. Otherwise if bigger engine would be always better it would make sense to run 6 litre V12 with 30 mm restrictor. That is obviously a nonsense. You loose power at high rpm because you can't fill the larger chamber with enough air. With bigger engines everything is heavier you loose power by accelerating the inertia of the heavier parts, in larger friction areas, with more oil inside etc. There is no point to have larger engine than necessary.

    Of course we have to take into account other factors which speak for selecting larger engines for R5 such as reliability (since they use stock engines), cooling (since they use stock engines) or large enough valves (since they use stock engine and can't enlarge its cylinder diameter) but all these three factors goes down with smaller restrictor.

    Another factor is level of turbo boost. With R5 it's given and same for all. With Rally3 it looks like they don't run on the same given maximum level. Maybe Br21 can add somethign here.
    Last edited by Mirek; Yesterday at 00:21.
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  3. #192
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    I think you added enough
    Once it popīs, you canīt stop...

  4. #193
    Senior Member Rally Power's Avatar
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    Quote Originally Posted by Mirek View Post
    IMHO that's wrong and illogical comparison because R5 cars have larger restrictor for such cylinder capacity (21% larger).
    How can R5 32mm restrictor be 21% larger than Rally3 30mm restrictor?
    Rally addict since 1982

  5. #194
    Senior Member Mirek's Avatar
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    Quote Originally Posted by Rally Power View Post
    How can R5 32mm restrictor be 21% larger than Rally3 30mm restrictor?
    Sorry, my bad. It's 14%. For some reason I counted with 33 mm.
    Stupid is as stupid does. Forrest Gump

  6. #195
    Senior Member Rally Power's Avatar
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    Quote Originally Posted by Mirek View Post
    Sorry, my bad. It's 14%. For some reason I counted with 33 mm.
    I was hoping you'd get it wrong again…

    Honestly, I wish you and the others are right on this matter, but I’ll only be convinced when Peugeot and Renault present their cars; with so many ups and downs on Rally3 rules and having R4-Kit fiasco in mind, one wonders if the FIA really know what it’s doing.

    Btw, it seems that Rally3/4 and 5 can also get a mild hybrid kit, just like Rally2. https://www.rallye-magazin.de/wrc/ar...klassen-45462/
    Last edited by Rally Power; Yesterday at 22:48.
    Rally addict since 1982

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