Dopdog
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| posted on 23/7/14 at 12:16 PM |
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Racing spring rates
I am interested to see what people use on their cars with regards to spring rates and bike engined cars used for racing.
I understand we all have a different view on this but will be interesting to see 
I will start my car has 275 rear with 300 front.
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adithorp
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| posted on 23/7/14 at 12:50 PM |
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Those sound high. I'd be interested to know if thats common on race BECS.
Wasn't the original sugested rates 160f/130r for road use. I know there's been a general move towards higher rates (prob'as the
motors have got more powerful). Mine are only road and trackday use but just for comparison, 210f/180r. I've recently swapped from 160 on the
back mainly because I found when loaded with camping gear and on lumpy roads I hit the bump stops more often than I'd like.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Dopdog
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| posted on 23/7/14 at 12:59 PM |
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yes they do seem high but have not driven the car yet. On my striker I also ran the same as you 210/180 and that was with a car engine in?
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jeffw
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| posted on 23/7/14 at 01:30 PM |
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220F/180R
I was thinking of going to 250F/220R
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MK9R
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| posted on 23/7/14 at 01:51 PM |
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You are far better off starting soft and stiffening it up slowly. Is it live axle? ? I dropped my fury rgb car down to 180 at the rear and then
stiffened it to 200. Any more than that and yoh couldnt get power down at the rear. I had custom front wishbones and requirwd 350 at the front but
that was a lot higher than standard. Id say you starting of far too high with those rates.
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
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Dopdog
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| posted on 23/7/14 at 01:59 PM |
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Thanks for the replays, the car has an independent rear end (for info). Looks like I have a few little jobs to do over the winter ready for next years
sprinting.
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MK9R
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| posted on 23/7/14 at 02:02 PM |
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If ypu want to make the front end of the fury more streamlined and generate some downforce I still have the mould for the front clam shell, basically
its a nose that bokts onto a classic bonnet
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
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SPYDER
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| posted on 23/7/14 at 06:06 PM |
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When pondering the same question multiple RGB Champion and friend Tim Grey advised us "250 all round".
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strikerbird
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| posted on 24/7/14 at 12:19 PM |
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I hillclimb my mk3 striker and use 225 front with ARB and 180 rear with a live axle. It's to hard for rough roads but works well on the hills.
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Robear919
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| posted on 25/7/14 at 02:06 PM |
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I ran 275/225 on my live axle plate LSD Striker Fireblade (420kgs - track day) nicely balanced in the dry but required aggression to overcome turn in
understeer in the wet.
I'm starting with 250/180 with my open diff live axle Striker Zetec (track day only sub 550kgs - I hope).
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