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C5 spring rates - going HIGHER on front?

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Old 10-29-2014, 02:52 AM
  #81  
C5Natie
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My current setup is C5Z springs, DRM Bilstiens and C6Z bars. Would I gain anything by going with a slightly stiffer front spring only, like a VBP Sport front spring? I do feel the car understeers at times but its very predictable and controllable. I run in a dot street tire class so Im on Toyo R888's.
Old 10-29-2014, 07:03 AM
  #82  
LateBreak
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Originally Posted by C5Natie
My current setup is C5Z springs, DRM Bilstiens and C6Z bars. Would I gain anything by going with a slightly stiffer front spring only, like a VBP Sport front spring? I do feel the car understeers at times but its very predictable and controllable. I run in a dot street tire class so Im on Toyo R888's.
What tire widths are you on? I'd expect that setup to oversteer unless you have some pretty wide rear tires with the c6z bars.

If it were me, I'd probably leave it as slight understeer is safer on a road course, but if you're auto-xing then I'd go to a softer front bar like a C5z.

I'd also get the car on scales if you haven't done that lately, you could be chasing a simple cross weight problem.
Old 10-29-2014, 08:50 AM
  #83  
C5Natie
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Originally Posted by LateBreak
What tire widths are you on? I'd expect that setup to oversteer unless you have some pretty wide rear tires with the c6z bars.

If it were me, I'd probably leave it as slight understeer is safer on a road course, but if you're auto-xing then I'd go to a softer front bar like a C5z.

I'd also get the car on scales if you haven't done that lately, you could be chasing a simple cross weight problem.
295/30r18 up front and 315/30 r18 in the rear. The scales is a good idea. Been wanting to do that.
Old 10-29-2014, 09:22 AM
  #84  
Matt_27
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Originally Posted by LateBreak
What tire widths are you on? I'd expect that setup to oversteer unless you have some pretty wide rear tires with the c6z bars.

If it were me, I'd probably leave it as slight understeer is safer on a road course, but if you're auto-xing then I'd go to a softer front bar like a C5z.

I'd also get the car on scales if you haven't done that lately, you could be chasing a simple cross weight problem.
What? Your front bar is a big part of what determines how you put power down. Don't go smaller. Yes, a higher rate front spring can be beneficial but it won't help your understeer- it will move the balance further towards understeer steady-state. If it makes the car faster though, who cares? It's all about getting on the throttle earlier and harder.
Old 10-29-2014, 09:31 AM
  #85  
crimlwC6
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Run a square set up before switching out springs. The staggered setup is suppose to balance towards understeer.
Old 10-29-2014, 01:30 PM
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C5Natie
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Thanks the advice guys. I'll will look into each of those points.



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