[V8] Track F/R
J123fs at aol.com
J123fs at aol.com
Mon Apr 9 23:19:22 EDT 2007
In fact, I really didn't mention any of those inferences......but, Scott
came the closest to explaining things correctly.
You can look at the finite level of grip at either end of the car- on our
front heavy cars when push (pun) comes to shove the front tires will always have
less absolute grip as you are asking the front wheels to both corner, turn,
brake, ect while carrying most of the weight. With the exception of braking
this ALWAYS equals less grip, ergo understeer.
Making the track wider, increasing the tire size up front, or also in my
case extra negative camber to counteract the roll of the chassis, ect gives the
front some MORE GRIP.
Not less in the rear, or some other explanation.
As I mentioned with regards to the wheels spacers up front before is: making
wider the track lowers the roll center (more grip) and lowers the effective
front spring rate as you just made the lever arm acting on the spring longer
- this too will equal MORE grip up front on an understeering car. Making the
front tires wider than the rear increases the amount of friction the tires
can put on the pavement relative to the rear - this too equals more grip up
front all things being equal.
Sadly, I have put way too much thought into car handling lately rather than
putting it to practice, and because I haven't been racing actively since my
kids where born, and money, time, wife's patience, ect (well, not exactly
true, I HAVE raced some) where in more abundance. I spend more time redesigning
the suspension(s) on my current and future race cars (all VWs, with both a MOD
and Production car on the way, so I KNOW about understeer :-) on software
and in my head in an effort to get some relief from the pressures in life in
general! I just wish I had more of the fore mentioned items, mainly time! I
have learned one cardinal rule though - in most cases it just takes more $$ to
solve most handling issues!
Here is a good primer on basic handing fixes courtesy the Texas region SCCA.
Title:
Car Setup and Troubleshooting Guide
Taken from the book "Performance Handling" by Don Alexander (Motorbooks
Intl. Publishers)
_http://www.wtrscca.org/tech.htm_ (http://www.wtrscca.org/tech.htm)
Cheers,
Jack
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