Car Analogy

OK, here are the spreadsheet results. The Orange cells, those are where I put the spring and bars that are under evaluation. That row is where all your results are. All the other columns to the right of the orange, those are your results for that setup. The rows above, those are the results for stock setups for all years, so you can get a feel for how your values compare to each years stock values.

Its important to note this is just static bias. Its a starting point and a guide. Nothing replaces real world testing. This could help you decide what to try next, and to understand why a change made the difference it did.

First, your current setup. 10K front (560 in/lbs), 8K rear (448 in/lbs), stock '06 swaybars. Look at the Overall Balance column. Your current bias is very near CR, which is very front, understeer biased. A good track setup, a less than fun street setup. Thats assuming you have a stock stagger. If you are square, then this is probably a decent bias. Most of the high end coilovers have spring rates that seem to assume square setup, as they are very front biased.

8k/10k, '06 swaybars in orange cells:

Car Analogy

Now lets compare to several other possible setups. Pay attention to the Overall Balance column.

Car Analogy

First, CR front swaybar. Even more front biased than CR. I would not recommend for stock stagger. 8k/10k CR front bar, '06 rear bar.

What if we go stiffest stock swaybars, '00-'01? This is stiffer than stock, and its shifted you a little more rear,, but if we compare to the original chart, it actually shifted bias more front than your 300/311 '06 bars. Seems counterintuitive, since rear is so much stiffer. The motion ratios are why. 8k/10k '00 bars.

OK, so what if we reverse the springs, and run the stiffer ones on rear. 8k/10k. Here is is with stock '06 bars. Way too rear biased, even for stock stagger. An oversteer recipe. 8k/10k '06 bars.

Lets throw a CR front bar on that, see if that fixes it. Better, but still really rear biased. Probably really bad for square setup. Perhaps OK for stock stagger if you want a very neutral, lively feel. 8k/10k CR front bar, '06 rear bar.

Lets try something different. Get another 10k spring, and run 10k/10k. Here it is with stock '06 bars. Hmm, this could be good with stock stagger. 10k/10k '06 bars.

What if we throw a CR front bar onto our 10k/10k setup? Look at that, right back to near original stock '06 bias! If you liked the stock bias, this might be your setup. 10k/10k CR front bar, '06 rear bar.

noodels

Thanks for posting this,
My oem 04 is 56/45. standard
current is 60.8 & 39.2 <with 10kg front 8 kg rear +CR front bar>
As said before 10/10Kgs with CR front ARB would be for my plan.
Again big thanks for posting

srovner

First, I cannot thank Forum Member CarAnalogy enough! Your charts are easy to interpret and provide clear findings. Just great!

So, the 10/10 w CR front sway seems to be the call. As I said before, I now run 10/8 but have a new set of Swift 12 lb front springs. I likely will install 12/10 and test it. I am predicting I will then install CR front sway. I just like to do things one step at a time to limit too many variables into the equation.

Member Noodkes- thanks to you, too.

This is great stuff!

Scott R
Golden, Colorado

srovner

srovner

noodels

Guess 60/40 again like post*23 above

srovner

Car Analogy

Will do soon as possible. Had shoulder surgery today abd difficult type one handed now.