Fixed Damper Spring recommendations

[IamScotticus]

There are soooo many discussions on springs...

Its just easier to ask again than to sort through it all.

 

What springs are we running on the basic SPAX G303 Front and G305 rear non-height adjustable spring perch on a standard S3 Caterham Live axle (Ital) that will not be raced?

 

I have old G305s on the rear now with blue springs that I can't ID yet, possibly Hyperco, but I will be looking for springs in a different color. Bilstein yellow would be nice.

Where do these spring numbers get stamped?

 

Thanx

 

 

 

[jbcollier]

They are not stamped.  Sometimes they will have paint markings identifying them by the manufacturer's own system, usually not though.  You can use a spring rate calculator (diameter, wire size, coils-per) to roughly figure out what you already have.

 

What spring ratings to use?  Depends on what you want.  Going to drive mostly by yourself?  Going tripping with a companion and full luggage?  Just a toy for the occasional track day?  Full race and you want to be competitive?  Lots of variables to consider.

 

Myself?  I went with as close to the original (Lotus S3) spring rates and lengths as I could find.  Mine will strictly be on the street and long, two-up trips planned at least annually, though probably more like two or three.  I suspect I might have to go to slightly stiffer rear springs but we'll see.

[IamScotticus]

Yes, just fun blatting, nothing serious.  I will require a softer ride for the roads here.

Edited April 10, 2023 by IamScotticus

[jbcollier]

Just go with the stock springs then.

[IamScotticus]

I don't know what stock springs are...

[jbcollier]

Redline will have them.  What you can readily find are

 

Front: 125 lb/11 inch, and Rear: 100 lb /14 inch

 

Love to find 115 fronts and 80 rears.

Edited April 11, 2023 by jbcollier