More autocrossness

http://www.youtube.com/watch?v=PCVZ03ZEZ7A

Bounciness is from 700 lb rear springs. They make corner exits pretty good, but entries can get sketchy under brakes.

it was fun man. i can tell from ur video that ur car handles so much better than mine. i was really hoping to her my skid out on the 3rd run. (but didnt :frowning: lol) it was freaking fun though cuz i didnt loose it ha

:frowning:

I hate being in santa barbara :frowning:

Good suspension setup!!! Don’t want to go too much harder…or softer. Softer and your tires would be barking up a storm. Seems to be a pretty balanced one! Good job! Are you using any anti-sway bars or rear strut bars?

Actually the rear is too stiff. On one or two occasions the rear goes loose, and the car takes aggressive steering inputs to correct it. A softer rear should make skids more catchable. I would definitely advise against 700lb rear springs in conjunction with the 23mm rear swaybar.

Or use the ST 19mm like me:) if you’re going that stiff with a spring to balance it out. But, of course a bigger sway bar is better overall to reduce overall body roll.

santa barbara hates u being there too :stuck_out_tongue:

:frowning: i worked

overall, eh?

Yeah, just make sure you match up the spring rates according to the bigger sway bars.

it was a joke, lol.

Your issues aren’t ‘because your springs are too stiff’, your issues are primarily due to your shocks aren’t able to properly damp the motion of the spring. Over-the-shelf Koni’s aren’t effective past 450lb/in springs in my opinion. OTS Konis are design for stock springs, maybe a little bit stiffer. I’ll have to check my spreadsheet a bit to find out about what they’re matched well with as terms of spring rate, but I know for a fact that they’re way underdamped on my car and I run 450F/550R. I think my damping coefficient was like 0.3 or something. Good for a street car, not for a race car.

Cars work well as a package. Either pick softer rates and over-the-shelf springs, or get custom valved shocks. That is, assuming you’ve got new bushings all around, plus your alignment is well sorted, and that you’ve got new tires. Or else changing rates/dampers is going to have much less of an effect on vehicle handling. Possibly could even have an adverse effect. Remember, they work as a package.

EDIT: My first statement is assuming your car is well sorted in all other areas regarding vehicle dynamics (proper alignment using appropriate values for an autocross car, proper tire pressures, good bushings, corner weight, good tires, etc…

I’m considering the springs too stiff cause I am hardly using any suspension travel. I dabbed some grease on the shock shafts, went riving on the roughest roads in my area, and found I am only using 20-35% of the overall available travel.

What makes you think that a low amount of suspension travel is a bad thing?