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Thread: V8s COTF

  1. 2nd March 2013, 01:10 PM #11
    33chinacars
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    NOT a Fan . Is there anyone else racing in the development series or is Stoner racing against himself . Thats what it sounds like
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  2. 2nd March 2013, 01:37 PM #12
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    rick130
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    Did I mention I don't really watch car racing ?

    (Ok, I turned on Channel 7 about ten minutes ago )
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  3. 2nd March 2013, 01:46 PM #13
    33chinacars
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    Quote Originally Posted by rick130 View Post
    Did I mention I don't really watch car racing ?

    (Ok, I turned on Channel 7 about ten minutes ago )
    Hooked yet
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  4. 2nd March 2013, 01:50 PM #14
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    pop058
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    New series (COTF) run a trans-axle, so quick roll centre adjustments would not be as simple I would imagine.
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  5. 2nd March 2013, 02:01 PM #15
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    rick130
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    Quote Originally Posted by 33chinacars View Post
    Hooked yet
    Well, I'm back on the 'puter
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  6. 2nd March 2013, 02:04 PM #16
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    rick130
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    Quote Originally Posted by pop058 View Post
    New series (COTF) run a trans-axle, so quick roll centre adjustments would not be as simple I would imagine.
    Post #3

    Although I haven't seen how they mount the wishbones up, whether it's to a subframe or directly to the trans case as in an openwheeler/sportscar.
    OK, just saw a graphic and the lower wishbones aren't mounted to the trans case.

    Whether the mounting point is stipulated or there is a tolerance, I don't know.

    It would make sense to give them a tolerance so they can change the RC position track to track and session to session.

    FWIW I haven't been near a racetrack or racecar workshop for over thirteen years now and don't really miss it. It seems like another lifetime. (and I had to work how long it was too )
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  7. 2nd March 2013, 03:41 PM #17
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    It can be changed, just not on the go as in the old car.

    The merc sounds so good as it runs a flat plane crank.
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  8. 2nd March 2013, 04:10 PM #18
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    Quote Originally Posted by clubagreenie View Post
    It can be changed, just not on the go as in the old car.

    The merc sounds so good as it runs a flat plane crank.
    So, this "flat plane crank" An 8 cylinders Boxer engine ?????
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  9. 2nd March 2013, 05:41 PM #19
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    Quote Originally Posted by pop058 View Post
    So, this "flat plane crank" An 8 cylinders Boxer engine ?????
    No, 180* crank throws instead of 90*.

    Real racing V8's use 180* cranks

    A 90* crank gives nicer natural balance, but a 180* crank gives even firing order for each bank so you can make use of the exhaust scavenging much better.

    Ferrari road (and race) V8's have always used a 180* crank, as do famous race V8's like the Cosworth DFV.

    The only way you can get the same exhaust scavenging with a 90* crank is to use 180* headers, and they're a nightmare to plumb.
    I've seen it done on a Speedway car and anyone I know that's attempted say never again.
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  10. 3rd March 2013, 08:36 AM #20
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    most of the holden engined f5000's of the '70's had flat plane cranks. They sounded awesome, someone still runs one at Murwillumba sprints . Frank Matich, John Walker, John Goss, Vern Schuppan, Warwick Brown, Alan Jones, Larry Perkins, Graham McRae, Frank Gardener, Chris Amon were just a few of the drivers in the fiercely competetive series. There has been nothing like it since.
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