[Fot] SCCA Archives (now bore size)

Kas Kastner kaskas at cox.net
Sat Dec 23 14:24:24 MST 2006


I suppose the power per inch reduces as you keep increasing the capacity and
do nothing for the volumetric efficiency.  But, the bigger bore does help with
the compression ratio and allows a reduction to the head milling. In the end
though, as a good driver, you'd feel 6 bhp the next time you ran against your
Dad. (so would he) With 17, hah, he'd have you out in the woodshed for a
"talking to".

Never Be beaten by Equipment
Kas Kastner
  ----- Original Message -----
  From: Tony Drews
  To: fot at autox.team.net
  Sent: Saturday, December 23, 2006 1:14 PM
  Subject: Re: [Fot] SCCA Archives (now bore size)


  If my calculations are correct, based in 1.2 HP per cu in, 89 MM
  would make 6.7 HP more than 87 MM.  92 MM would make 17.3 HP more than 87
MM.

  I'm not sure I could feel 6 HP.  I could probably feel 17,
  though.  I'm still going to run the 87's...

  - Tony

  At 01:49 PM 12/23/2006, Kas Kastner wrote:
  >Easy to calculate how much more power from the big oversize's.  Figure
about
  >1.2 horsepower for each cubic inch increase. Not nuts on accurate, but
close
  >enough for holiday gripping.
  >
  >Never Be beaten by Equipment
  >Kas Kastner
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