Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: spring rates on jpsc cars with ARB please?
bi22le

posted on 30/12/15 at 08:46 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member
mark chandler

posted on 30/12/15 at 09:52 PM Reply With Quote
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.
View User's Profile View All Posts By User U2U Member
jeffw

posted on 30/12/15 at 10:10 PM Reply With Quote
I run 250 fr, 225 rear.


[Edited on 30/12/15 by jeffw]






View User's Profile View All Posts By User U2U Member
adithorp

posted on 30/12/15 at 10:28 PM Reply With Quote
I'm running 210 front and 180 rear with a front ARB. 550kg





"A witty saying proves nothing" Voltaire

http://jpsc.org.uk/forum/

View User's Profile View All Posts By User U2U Member
theprisioner

posted on 30/12/15 at 11:13 PM Reply With Quote
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/

View User's Profile Visit User's Homepage View All Posts By User U2U Member
SPYDER

posted on 31/12/15 at 01:59 PM Reply With Quote
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.

View User's Profile Visit User's Homepage View All Posts By User U2U Member
MattD

posted on 31/12/15 at 02:27 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member
bi22le

posted on 31/12/15 at 06:54 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member
strikerbird

posted on 1/1/16 at 07:25 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.