Never Be beaten by Equipment
Kas Kastner
----- Original Message -----
From: Kas Kastner
To: Michael Porter ; SHANE Ingate
Cc: BillB@bnj.com ; fot@autox.team.net
Sent: Monday, January 08, 2007 12:47 PM
Subject: Re: [Fot] Header primary lengths
When considering long stack on aircraft or drag race cars vibration of the
pipe is a major concern. If there is no pipe then there is no worry. Nothing
like being at 25,000 and seeing your beautiful long pipe stack that had be so
carefully tuned flying into your tail assembly and sending you to the ejection
button.
With the extremely high revving F-1 engines, shorter pipes were an answer.
First shown by Ferrari and quickly followed by everyone else, but go back a
decade or two and see how the lower rev F-1 engines were tuned, not short pipe
by any means.
Hours and hours and even more hours looking for a couple more HP on the
engine dyno was mostly frustrating, but, it did confirm the longer primary
pipes ON TRIUMPH engines definitely made more power at the top end. Four into
one, squared off, into a collector for a single exhaust pipe did the trick for
me.
Lee Mueller by the way has the altitude record set at the old Sear's Point
race track in about 1968 for a land going Spitfire, about 20 feet. Lots of
stuff was shorter after he came down. Jimmy Coan would have to give the exact
position on the track as he was in charge that day.
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