Springs for Spax shocks

[Vinman1]

Hope all are doing good.

Looking for DSK Spec springs for Spax AS 180-303 (Front) and AS 180-305 (Rear) shocks.

Springs specs; ID for both = 1.9-2.0"

Front = 125 lb/inch Free length = 10.75"   

Rear = 90 lb/inch Free length = 14.25" 

 

Got a message out to Springcoil in the UK, thought I would check this side of the pond

 

Best,

V

[NSXguy]

messaged. 

[MV8]

Spax's site does not cross reference to the old part numbers. If you have new old stock to install, are the seats adjustable? With the 1-7/8"/1.9" id springs, 10 inch free length is the standard. If the rear lower seat is not adjustable enough to accept a 10" but the seat is removable, a sleeve can be made to slip on and raise the lower seat as needed to accept a 10 inch spring (I did this when adapting adjustable seats to my spitfire coilovers using a coilover kit for a honda).

If you fit coilovers with an adjustable seat that accepts 2-1/2" id springs, 14" free length is available.

 

These will work if you can adjust the spring seats to accept a 10 inch spring but I would strongly consider 2-1/2 id adjustable coilovers all around if there is spring clearance. You could have 2-1/2 just on the rear to satisfy the 14 inch length and subsequent eye to eye length.

QA1 255SM10-10" are listed as 1-7/8 id, and come in 95 and 125 for about $68 each. Shot peened, double heat treated, and guaranteed to stay within 5% of the listed rate forever. Chrome-like powder coat.

Eibach 330-188-(rate) has the same dims but the closest rates are 100 and 130 for $66 each. Red.

Hyperco 444-10S has the same dims but the closest rates are 100 and 125 for $76 each. Blue.

www.speedwaymotors.com

[MV8]

The Spax G303/G305 are for Lotus '59-'70 series I/II/III and Caterham live axle '72+ but are not adjustable for ride height. The G775/G776 are. They don't provide the damper specs in the catalog but may provide that info with a call to the tech line. The spring ID may be different between the 300 and 770 series dampers. They don't provide that info.

[IamScotticus]

Was it stiff springs and soft dampers?

or

soft springs and stiff dampers?

 

[Vinman1]

Soft Springs w/ free length much shorter than called for. Front springs are coil bound. Shocks are NOS w/ adjustable platforms (AS) came with the barn find items, no leaks as of yet.

 

V

[MV8]

If you cannot find the 14 inch free length needed for the rear in 1-7/8, another option to two lower seat 4  inch sleeves with 1-7/8x10 rear springs are 2-1/2x14 rear springs using four lipped seat adapters that can be made or ordered. It can be a lipped 1/8 thick steel washer, where the washer id is 1-7/8 (centers washer to the body), the od is 3-1/8, and the rolled ring / lip is 1/8 x 3/8 or 1/2 wide, wrapped around the od of the washer or has a 2-7/16 od. The original seats support but the washers keep the springs centered on the body. The larger springs will only increase the coilover od by a radius of about 3/8 compared to 1-7/8.

[Vinman1]

Good info. Will consider doing that, if I can not get any to the desired specs. Thx!