Re downforce of the nissan GTP cars.
I remember a certain Friday at Lime Rock Park when John Morton experiences a
significant _lack_ of downforce at the top of the uphill.
I was @ turn 2 at the time. If you've never seen Roz Rozitoski's photos of
the shunt, you are missing a classic. Roz had the old Nikon grinding out
6pfs when John came up the hill and got the front off of the ground. The
rest of the car followed, going totally airborne, flipping front over back
and landing upside down and backwards, then flipping back over and coming to
a stop in more than a few pieces. There are, I think about 5 or 6 frames in
the series. By frame 2, the car is in the air. in frame 3, the car hasn't
landed yet and the corner worker, Bruce Kohlker is already on his way with a
fire bottle.
Amazing.
Heady days those were.
On Thu, Mar 11, 2010 at 4:03 PM, Ted Schumacher <tedtsimx@bright.net> wrote:
> Hello list. We need to remember we are talking about race cars and racing.
> Somehow getting only 1 or 2 seasons out of a set of calipers before they
> need something is like being "slightly pregnant". After every session they
> should be checked and after every event they should be thoroughly inspected.
> Do this immediately after the car is unloaded, not the day before you head
> out the next time. If you want to help cooling, drill some holes around the
> perimeter of the piston, where it protrudes beyond the boot. These holes
> will let the hot gas that builds up inside the piston vent to
> atmosphere.This will get rid of some of the heat transfer from piston to
> caliper. Commercial content, we have rebuilt calipers - Spit. GT6, TR4,
> early and late TR6 for $69.95 each exchange. Toyota 4 piston calipers,
> rebuilt, including steel braid hose to go from caliper to TR bulkhead
> fitting (eliminates need to adapt hoses or steel lines) - $225.
> On another topic. the IMSA GTP cars did indeed generate a huge amount of
> down force. On the banking at Daytona, tires would blow from down force
> load. This led to the track installing the chicane at the end of the back
> straight just before entering NASCAR turn 3. Ted
>
> --
> Ted Schumacher
> tedtsimx@bright.net
> http://www.tsimportedautomotive.com
> 108 S. Jefferson St.
> Pandora, Ohio, USA 45877
> Fax: 419.384.3272 (24 Hrs.)
> Phone: 800.543.6648 (US & Canada)
> Tech/ Gen. Information/ Worldwide: 419.384.3022
>
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