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Author Topic: Best road course spring rate setup  (Read 9409 times)

Offline BlueZo6NVA

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Best road course spring rate setup
« on: March 09, 2015, 09:08:06 pm »
Hi Guys,
I'm looking into getting my car setup for the season.  It was an oval car that I'm setting up for road course duty.  Does anyone have any info on a good spring rate setup that I could use for turning right and left and hitting the occasional curbing?  Thanks!
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Offline justfreaky

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Re: Best road course spring rate setup
« Reply #1 on: March 09, 2015, 10:43:39 pm »
If you are in the 200lb range I would start with 175-185 (F) and 135-150(R). The front needs to just be stiff enough to keep from bottoming out the shocks and ball joints.

The rear needs to be really soft to plant the rear of the car to drive off from cone to cone.

This is info I got from Randy when I first ask the same question. Run even spring rates on both sides (as we run left and right turns).

Hope that helps you some.

Steve
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Offline IraceLegends77

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Re: Best road course spring rate setup
« Reply #2 on: March 10, 2015, 06:19:01 am »
How big is the track? We ran a 2+ mile track last year and had a lot bigger springs than what Steve has suggested. I could see running softer though if it was a auto cross.
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Scott Wilkerson #77   Vision Graphix Racing

Offline BlueZo6NVA

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Re: Best road course spring rate setup
« Reply #3 on: March 10, 2015, 08:27:12 am »
I'll be running Summit Point's Main course in W.VA which is 2 miles.  I don't plan on straying away from that course to much in my first year, so I'm trying to focus my setup there. 
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Offline IraceLegends77

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Re: Best road course spring rate setup
« Reply #4 on: March 11, 2015, 06:32:36 am »
front 275 and rears 180 t0 190 depends how much you weigh
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Scott Wilkerson #77   Vision Graphix Racing

Offline racerrad8

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Re: Best road course spring rate setup
« Reply #5 on: March 11, 2015, 12:56:46 pm »
Quote from: justfreaky on March 09, 2015, 10:43:39 pm
If you are in the 200lb range I would start with 175-185 (F) and 135-150(R). The front needs to just be stiff enough to keep from bottoming out the shocks and ball joints.

Steve

Yeah, that changed several years ago when we started running the sidewall flexing & stickier Federal tires.  Since then set-ups are all over the map from really stiff to what would be considered soft at 250 in the front & 175 in the rear.

Randy - RPM
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Randy - RPM
randy@rpmracingca.com
2010 INEX/Intercomp Raceteam of the Year.
2009 INEX National and World Champion, Thunder Roadster.

Offline BlueZo6NVA

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Re: Best road course spring rate setup
« Reply #6 on: March 11, 2015, 01:16:54 pm »
yea, I would weigh in with all my gear at about 245 lbs, so im thinking that the 250 front and 175 rear may be to soft?
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Offline Earnst85

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Re: Best road course spring rate setup
« Reply #7 on: March 11, 2015, 02:34:01 pm »
I weigh about 260 and ran the Turkey Bowl @ Summit a few years ago. I had 275 fronts, 225 (LR) and 200 (RR).  I think going stiffer @ Summit would have helped as you have to carry a lot of momentum. There are only a few slow speed corners.
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Chad Earnst #85
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Offline BlueZo6NVA

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Re: Best road course spring rate setup
« Reply #8 on: March 11, 2015, 05:45:28 pm »
Awesome!  Thanks!  I'm hoping to lose a bit of weight before I get out there so those rates should be pretty close.  Appreciate it!
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