bi22le
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| posted on 30/12/15 at 08:46 PM |
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spring rates on jpsc cars with ARB please?
Just wondering what the tried and tested guys are running on their cars.
I know car weight is important so please state this. Competition car info preferred.
I am expecting to be changing my Current 300lb front springs to mid or low 200lbs following some calcs and chats to a few people.
Rears will probably stay the same at 225lb.
i am going to fit caterham S3 ARBs as a starting point. Hopefully nice and soft and from a car of similar weight, 540kg.
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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mark chandler
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| posted on 30/12/15 at 09:52 PM |
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What size springs you running Bizzle, I have some 2 1/4, 225lb 9'" long ones that I would like to swap for some that are around 300lb.
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jeffw
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| posted on 30/12/15 at 10:10 PM |
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I run 250 fr, 225 rear.
[Edited on 30/12/15 by jeffw]
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adithorp
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| posted on 30/12/15 at 10:28 PM |
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I'm running 210 front and 180 rear with a front ARB. 550kg
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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theprisioner
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| posted on 30/12/15 at 11:13 PM |
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200ib front 300 rear and arb front and back own design
http://sylvabuild.blogspot.co.uk/2014/11/anti-roll-bars-arb.html
I did not do much calculation but I can tell you it works wonderfully at Kames sprint track 99.6s last MSA timed run. Of course it is a J15.
226/326 550Kg total
[Edited on 30/12/15 by theprisioner]
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
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SPYDER
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| posted on 31/12/15 at 01:59 PM |
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When we were building our Phoenix we asked our friend Tim Gray ( Multiple Locost, RGB and Bikesports Champion )
He said to go 250 all round. So we did.
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MattD
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| posted on 31/12/15 at 02:27 PM |
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Chassis supplied with 180fr / 130 rr, but that was way too soft.
Currently on 225 Fr / 180 Rr with front ARB, live axle rear, which is a good compromise.
Was better on 275 fr /225 rr on track, without the ARB but too stiff for regular road use (my old steel s/a AVO shox prob a factor too).
Stylus, 625 KGs
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bi22le
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| posted on 31/12/15 at 06:54 PM |
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quote:
Originally posted by mark chandler
What size springs you running Bizzle, I have some 2 1/4, 225lb 9'" long ones that I would like to swap for some that are around 300lb.
I mark. Unfortunately mine are 13.5" long as per procomp shocks. I would probably try and keep my old springs anyway just incase I need to
revert back.
I think I have a set of 225 squirrelled away somewhere. These seem to aiming in the right ball park.
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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strikerbird
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| posted on 1/1/16 at 07:25 PM |
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I use 225 front with an arb, 125 rear with a live axle on a striker. It handles well I won class 2A in the service hydraulics championship, so it
works for me.
Jim Spencer won about every championship going a few years ago using the same setup.
John Bradshaw also competes in a striker and I'm sure his rears are around the same.
The shocks are protech ones that have been valved to suit the car. My car weighs 490kgs.
Hope this helps
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