Does anyone know if STU will be a fully authorized class next year? I am considering swithing and will try to do some mods over the winter, but if it is not, then who knows.
I have started doing some calculations on spring rate and suspension frequency and have noticed that when most people put higher rate springs on the rear as compared to the front, the frequency is a lot higher than the front. Any input? One thing I can say is that suspension is extremely complicated figuring out balance between springs, sway bars and dampers.
STU
-
EliseAutoXr
- Posts: 1629
- Joined: Mon Jun 14, 2004 3:34 pm
- Location: Knoxville, TN
Hey, I may not. I really enjoy running with you guys, but I'm starting to see the logic in spending money on mods that don't wear out as fast as
R-compounds do. STU affords some mods, but not over the top like street prepared and beyond.
BTW, I put the front bar at its softest setting, so hopefully it will be more to my liking. The only problem is then I can't blame the car for sucking so bad.
R-compounds do. STU affords some mods, but not over the top like street prepared and beyond.
BTW, I put the front bar at its softest setting, so hopefully it will be more to my liking. The only problem is then I can't blame the car for sucking so bad.
2010 MINI Cooper S, DS
Trey
Trey
-
EliseAutoXr
- Posts: 1629
- Joined: Mon Jun 14, 2004 3:34 pm
- Location: Knoxville, TN
The reason that spring frequency goes up with a stiffer spring is that the spring is now under-damped. The damper was designed to make the spring critically damped or close to it. If your choice of new springs isn't TOO far from stock, you should be ok. If you're going for a drastic change then you should look into some adjustable dampers as well.
Stephen Wilson
^^^^
yes, If you get coilovers with teh spring rates you need for autocross, they will surely have to be custome valved.
OR
Since most coilvers for scoobs are 7kFront/5kRear, you could just flip the springs. I run 9kFront/10kRear.
spring rate chart
0 Kg/mm 0 Lb/In
1 Kg/mm 56 Lb/In
2 Kg/mm 111.9 Lb/In
3 Kg/mm 167.9 Lb/In
4 Kg/mm 223.8 Lb/In
5 Kg/mm 279.8 Lb/In
6 Kg/mm 335.7 Lb/In
7 Kg/mm 391.7 Lb/In
8 Kg/mm 447.6 Lb/In
9 Kg/mm 503.6 Lb/In
10 Kg/mm 559.5 Lb/In
11 Kg/mm 615.4 Lb/In
12 Kg/mm 671.4 Lb/In
13 Kg/mm 727.4 Lb/In
14 Kg/mm 783.4 Lb/In
15 Kg/mm 839.2 Lb/In
16 Kg/mm 895.2 Lb/In
17 Kg/mm 951.2 Lb/In
18 Kg/mm 1007.1 Lb/In
19 Kg/mm 1063.2 Lb/In
20 Kg/mm 1119 Lb/In
21 Kg/mm 1175 Lb/In
22 Kg/mm 1230.8 Lb/In
yes, If you get coilovers with teh spring rates you need for autocross, they will surely have to be custome valved.
OR
Since most coilvers for scoobs are 7kFront/5kRear, you could just flip the springs. I run 9kFront/10kRear.
spring rate chart
0 Kg/mm 0 Lb/In
1 Kg/mm 56 Lb/In
2 Kg/mm 111.9 Lb/In
3 Kg/mm 167.9 Lb/In
4 Kg/mm 223.8 Lb/In
5 Kg/mm 279.8 Lb/In
6 Kg/mm 335.7 Lb/In
7 Kg/mm 391.7 Lb/In
8 Kg/mm 447.6 Lb/In
9 Kg/mm 503.6 Lb/In
10 Kg/mm 559.5 Lb/In
11 Kg/mm 615.4 Lb/In
12 Kg/mm 671.4 Lb/In
13 Kg/mm 727.4 Lb/In
14 Kg/mm 783.4 Lb/In
15 Kg/mm 839.2 Lb/In
16 Kg/mm 895.2 Lb/In
17 Kg/mm 951.2 Lb/In
18 Kg/mm 1007.1 Lb/In
19 Kg/mm 1063.2 Lb/In
20 Kg/mm 1119 Lb/In
21 Kg/mm 1175 Lb/In
22 Kg/mm 1230.8 Lb/In
Last edited by thrdeye on Thu Apr 26, 2007 10:11 pm, edited 1 time in total.
Chris Harp
2009 Mazda RX-8 | 2018 Toyota Tundra | 2011 BMW M3
2009 Mazda RX-8 | 2018 Toyota Tundra | 2011 BMW M3