Quote:
Originally Posted by Allan1875
As quoted stripes are progressive, dots are linear. Higher the number of dots, stiffer the spring. I have a chart on my home PC that i have converted to lbs.
The bit I have highlighted in bold, i personally wouldn't be running a stiffer rear spring on low traction, I'd be softening the rear spring to stop over rotation, the rear spring on the XRAY by kit is already at 2.28lbs from memory which is firm enough. On low traction like grass or polished floor, i tend to come down to the 1 Dot rear although I am planning to try AE springs on the car soon. Stiffening a car up tends to increase rotation at least from my testing as the car leans less, therefore bites less.
Neal - Not sure if you were running the same AE Gray as Nathan was on the rear of his XRAY but they are ever so softer than XRAY kit springs.
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I did run the greys yes, and they were too soft for low traction tracks. Going softer made it worse! Going harder stopped the collapse mid corner and kept the rotation constant (no instant spin out) and so the corner traction, rotation and apparent grip was better.
I've just gone through exactly the same with my BMAX4-III. I'm now running the hardest spring i can, and its spot on on low traction, but switching to a soft spring kills it into a spinning out wreck. I think its all about getting the right spring weight for the weight of the car. I struggled for a year with the xray trying to get it work on the low traction indoor tracks what we have here, gym floors. Tried everything. more weight, less weight, light diff oils, heavy diff oils, shock towers, wishbone hangers, roll centres, no roll bars, roll bars (never tried super stiff on rear though to be fair), all the spring/oil weights you can imagine. Stiffer spring is better for the car I had. I ended up running AE yellows (their heaviest) on the low traction indoor tracks, which was the best I had had it. I tried all the xray springs available at the time (1dot, 2dot and 2 stripe). the progressives were awful.
Changing to another car instantly helped, but i went through the same issue to start with. Going to spring weights much heavier than AE yellow rears has helped so much. I'm currently running Yokomo Orange which are much heavier, and I've got blacks and purple to try next, but possibly they will be best for high grip astro. Saying that i know someone who runs purples (heaviest) at York indoors on a BMAX4-II.
I think had I tried this on the xray then it would have been much better. It's gone now, so i can't.
I guess my point is, with the car, you need to try find what works for you, don't take "lighter spring is better for low traction" as a gospel rule. it isn't.