Date: Tue, 18 Nov 2003 23:59:05 -0400 From: Dexter J <lamealameadingdongnopsamlamelame.org> Subject: Re: Failiure On Track
Salutations: **-** <m.faulksnopsamternet.com> wrote: > >> The great problem with crisp >> aerodynamics is that they work just as well off the pavement as they do > on. > No argument with that one!!! > >> http://members.aol.com/healeypics/lemans.html > > Or that one!!, Worst crash I've had was putting an AX GT backwards into a > tyre wall at speed, broke a finger and compressed my spine. After that > you don't half take a lot of care over the setup and safety of the car. >> >> Not trying to be a wet blanket or anything - I think 170+ is completely >> doable and the right way to go.. > > Well lets put it this way if it does get airborn at 170+ your not going > to have much time to think "Oh Dear" ;-) Hence why safety is beyound > paramount on this one. > Sorry brother Faulks - I'm singing to the choir. Having just stupidly greased a beloved 9000T and looking down the barrel of cheapo NG900 5 speed (no T) - it is on my mind.. Your choice of C900 will inherently limit a number of problems relating to excursions off the line at most any speed - basically a very a good skin design to mount a cage in. The only extra trick I've seen and not mentioned was to extend the cage around the floor along the fire wall to keep the wheel wells off your feet in the event of disaster. That round front windscreen should go a long way to keeping drag under control as you get beyond 160. But I would be concerned about the rear end lifting as you get into that range as I've always felt it makes for a vortex over the rear quarters and my overall take is that you may have to eventually lower the roof to make 170+ - but at that point you are back to square one on the belly math.. Just how much have you chopped out of the engine to lighten it? Rods and crowns of course - have you looked closely at the crank lobes yet? Thar be dragons - but you might well be able to squeeze a extra 3-500 RPM out of the mains if you can carefully lower the weight in there. Here's a link to a very interesting PDF on my server regarding a Mondello 403 Olds block build out that might be useful. It's not a great scan, nor a SAAB engine of course - but if covers some interesting oiling problems regarding high RPM builds. ftp://gmc:gmcnopsamdexterdyne.org/UnsungHero.pdf J Dexter - webmaster - http://www.dexterdyne.org/ all tunes - no cookies no subscription no weather no ads no news no phone in - RealAudio 8+ Required - all the Time Radio Free Dexterdyne Top Tune o'be-do-da-day The Rolling Stones - The Last Time http://www.dexterdyne.org/888/186.RAM
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