engine difference comp vs street daytona? | FerrariChat
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engine difference comp vs street daytona?

Discussion in 'Technical Q&A' started by boxer frank, Nov 3, 2004.

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  1. boxer frank

    boxer frank Karting

    Sep 30, 2004
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    toronto canada
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    FRANK
    #1 boxer frank, Nov 3, 2004
    engine difference comp vs street daytona? ????
    whats a comp daytonas redline?
    whats the highest u gentlemen have ever reved your daytonas and how often??
     
  2. ferrarifixer

    ferrarifixer F1 Veteran
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    Jul 22, 2003
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    Phil Hughes
    #2 ferrarifixer, Nov 4, 2004
    ....again, very close to standard, just tweaked in the obvious spots. They use tappet shims on the valve stem tip, instead of big shims in buckets like std. Some say this is because the big shims flick out at high rpm, but I've never seen this. I think it's just to save weight.
     
  3. boxer frank

    boxer frank Karting

    Sep 30, 2004
    165
    toronto canada
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    FRANK
    #3 boxer frank, Nov 4, 2004
    always wondered why the ultimate sportscar uses such heavy shims
    guess cause they were off the shelf ie fiat volvo etc and otherwise cams would have to come out for valve adjustment !
     
  4. Jay GT4

    Jay GT4 F1 Rookie

    Oct 16, 2001
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    e sempre incinta
    #4 Jay GT4, Nov 4, 2004
    I've heard that comp Daytonas have about 400HP and all the differences are internal.
     
  5. pma1010

    pma1010 F1 Rookie

    Jul 21, 2002
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    Philip
    #5 pma1010, Nov 4, 2004
    Most of the [engine] stuff I've read about from the era focused on "breathing" - cams and carbs on the intake, exhausts on the output. For example, the Daytona (I believe) originated the "P6" competition cam profile, subsequently used on the race 308s etc. The race engines (like the Boxer, to your other, related thread) often used (Lucas) FI rather than carbs too.

    Given advances in [flow] understanding and materials, much more can be gained today from older engines than was possible in the past. [At Goodwood in 2003, Murray Walker (or Alain deCadenet) was reporting 64 bhp from a 500cc Manx Norton (128 bhp/L, one cylinder) compared with a max of 100 bhp/L in the era. Wayne Obry has reportedly built a (3L) 250 SWB motor with 420 BHP (140/L) - at a cost. Michelotto 308s with 340 - 360 BHP (2-valve, 120/L) mostly from cams, head porting, FI (Lucas) and so on. I am sure there are many more examples].
    This help at all?
    Philip
     

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