Compression ratio is a moving target.. How hard are you going to turn
the engine and what are the breathing capabilities ??? It is more of a
cylinder pressure thing than a compression ratio deal.. If the intake
and / or breathing are restricted then the CR can be set very high. An
example of this is a Winston Cup restrictor engine.. Current C/R in
those is 17 to 1 at sea level racing conditions... No air no pressure in
the cylinder, hence no problems.. Just don't put a heavy load on it at
low RPM.. At Bonneville I would consider 16 to 1 a good starting point
if you want to get with the program.. At 4200 ft the air pressure is low
and it will run like 14 to 1 at sea level... Unfortunately it will not
make the 14/1 sea level power.... The largest problem you have is dyno
time on the engine with the high compression.. I have considered dyno
engine with 14.5/1 and then swap pistons for 16 to 1 or more to go to
salt and run with that.. Unfortunately also is the Cosworth I run you
can really only get about 14/1 no matter what you do .. Was enough for
the 2 club for John Goodman but not enough for me.. runs G/GL and G/FL
have had both records for a while but going for more this year..
Shooting for 240 as G/FL .. Been over 230 out the back door with
averages in the 218..224 range.. Many transmission woes keep the car
back really needs a good working 6 spd. to keep the RPM in the 10-11 k
range...Hope this helps.
Dave Dahlgren
Engine Management Systems
Keith Turk wrote:
>
> Hey Rich you are right.. that ought to be good enough for the long
> course...
>
> That was one of my goals going into this thing was to drive the Long course
> on the salt....
>
> I really have kinda set myself up for the possibility of going over two
> hundred this year... don't know if it is going to happen but I sure would
> get a kick out of it...the current record for D GALT is like 219 mph and I
> don't really have an aero package that will be helpful there... we did
> start on the D motor tonight... I am a little worried about the
> compression... and Cam.. it is really High.. and I am not sure how good
> that is up there... The motor is around a 15:1 compression and there isn't
> much I can do about it.... I really think it would be better in the 12-13
> range.. any thoughts?
>
> Keith
> 100/4 ... Bugeye... to many Box sprites and this ole Camaro..
>
> ----------
> > From: V4GR@aol.com
> > To: Land-speed@autox.team.net
> > Subject: Fwd: Powerfest Rockingham...boundary="part0_922931505_boundary"
> > Date: Wednesday, March 31, 1999 5:51 PM
> >
> > This is a multi-part message in MIME format.
> >
> > --part0_922931505_boundary
> > Content-ID: <0_922931505@inet_out.mail.aol.com.1>
> >
> >
> >
> > --part0_922931505_boundary
> > Content-ID: <0_922931505@inet_out.mail.aol.com.2>
> > Content-disposition: inline
> >
> > From: V4GR@aol.com
> > Return-path: <V4GR@aol.com>
> > To: johnbeck@blueridge.cc.nc.us
> > Subject: Re: Powerfest Rockingham...
> > Date: Wed, 31 Mar 1999 20:48:24 EST
> > Mime-Version: 1.0
> >
> > hey Keith--nice going. Its great when something works the way you planned
> > isn't it? Any class that Camaros can run in are tough cause there are so
> many
> > of them. You should be good for the long course in Aug, With
>any
> luck.
> > See you there.
> Rich Fox B/G alt #1104 or maybe 104
> >
> > --part0_922931505_boundary--
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