Raleigh/Durham/Triangle Area Meet
#7726
BTW as for upcoming events I know Dan and I (at the minimum) are planning on going to Fayetteville Nov 13th for Force-Fed's southeast faceoff. I was thinking we haven't had the fall cookout like I hosted last year so I can host a breakfast or something similar that morning at my place then we can all caravan down to the strip. Not 100% sure on the details yet but wanted to at least give some notice so you all can start making plans.
#7728
#7729
Yep. You can "corner balance" a car to affect the weight distribution, but from what I read on the second link below, it only affects cross-weight balance (LF+RR to RF+LR). I'm sure Jim could speak with much more experience on the subject, but if you have non-adjustable factory struts and shocks, there's not really anything to do.
http://grassrootsmotorsports.com/art...orner-weights/
https://www.evolutionm.net/forums/ev...t-numbers.html
My black car was corner balanced. If you spend that much for a suspension, might as well get the most out of it.
http://grassrootsmotorsports.com/art...orner-weights/
https://www.evolutionm.net/forums/ev...t-numbers.html
My black car was corner balanced. If you spend that much for a suspension, might as well get the most out of it.
Of course there are many other factors such as pre-load on springs or anti-roll bars, but let's not complicate things.
Jim
#7731
Could be. Because the driver weight takes effect. So, if your skinny you won't notice. But if you're.......fat like Justin then it will be more obviouse. Lololol
#7733
Second is ride height. That can be a tough one to get right because you never know how a chassis has been stressed or a body has been bent because of rough roads or very hard track use (road racing track). Fender gap is a quick way to dial in ride height, BUT - the best way to measure ride height is on a flat (absolutely flat) surface and measure to known frame points. If the body has been stressed a gap may look correct, but frame to flat surface measurements might tell a different story.
Third is corner balance, which is back to the four legged table metaphor. Unless you can do things like move the engine to the middle of the car or other weight transfers you are pretty much stuck with the front to rear weight bias, BUT you can work on getting the diagonal weights 50/50. IF your car's suspension allows for adjustment.
We can do small things such as move the battery to the rear in the hope of getting some weight off the front and if you have a coil-over setup you can adjust the corners so that (with driver weight) the diagonal is 50%.
If you were setting up a TRACK ONLY Evo you would want to first get ALL the weight out of the car that you can (i.e., sound insulation, A/C, rear seats, etc). The penalty will be NVH (noise, vibration, harshness). You will add weight with an approved roll cage - keeping in mind to minimize weight added to the front. All suspension bushings replaced with poly or metal bushings (lots more NVH).
If the class has a minimum weight requirement you will try to get well below the limit so you can add ballast weight where you want it to be (usually low and to the rear).
Set ride height, align to specifications that will provide you with grip (not a setup you want for the street), and then corner weight to keep handling consistent left to right.
But our cars are going to be street driven (maybe some HPDE weekends) so it is a compromise that we need to strike between ultimate handling and the realities of street driving.
If you ever want to discuss street/HPDE setups, let me know.
Jim
Last edited by jplgsx; Oct 25, 2011 at 05:31 AM.
#7734
Jim
#7736
#7737
So who all is planning on going down to Fayettville for the meet next weekend? We are planning on having a meet for breakfast on Sunday and then rolling down to the drag strip. We plan on getting down there when the gates open at 10:30. It would be nice to get a pretty good crew to roll down from the Triangle!
#7738
So who all is planning on going down to Fayettville for the meet next weekend? We are planning on having a meet for breakfast on Sunday and then rolling down to the drag strip. We plan on getting down there when the gates open at 10:30. It would be nice to get a pretty good crew to roll down from the Triangle!