Front springs

Author
Discussion

captainpugwash

Original Poster:

110 posts

111 months

Monday 20th November 2017
quotequote all
My SR4 is currently at 65mm under front chassis rail but the front top spring seat has only about 5mm adjustment left to top of threaded body?
Under load the springs are about 100mm in length & say on them, Radical 100 / 95.
Any advice appreciated smile

Gc285

1,216 posts

200 months

Tuesday 21st November 2017
quotequote all
I assume its the same as the sr1,
I set front ride height using the tie bar, not the spring height adjuster. Front springs I generally only set a preloaded adjustment of 3 to 4 turns.
When off the ground with nik link anattached one end, I release the spring until loose and then wind it back up until it just touches,ie zero preload, I then turn the spring height adjuster to +3 or +4 turns pre- load. I do the same with the rear but set it to zero preload and then do the corner weights adjusting only the back springs to get the best cross weight. Re check ride height.
If you have a look at the Radical owners manual, it says it all in there along with their base setup for all the geometry.
....unless ive been doing something wrong all this time


Edited by Gc285 on Tuesday 21st November 14:27

captainpugwash

Original Poster:

110 posts

111 months

Wednesday 22nd November 2017
quotequote all
Gc285 said:
I assume its the same as the sr1,
I set front ride height using the tie bar, not the spring height adjuster. Front springs I generally only set a preloaded adjustment of 3 to 4 turns.
When off the ground with nik link anattached one end, I release the spring until loose and then wind it back up until it just touches,ie zero preload, I then turn the spring height adjuster to +3 or +4 turns pre- load. I do the same with the rear but set it to zero preload and then do the corner weights adjusting only the back springs to get the best cross weight. Re check ride height.
If you have a look at the Radical owners manual, it says it all in there along with their base setup for all the geometry.
....unless ive been doing something wrong all this time


Edited by Gc285 on Tuesday 21st November 14:27
Interesting! Doesn't say any of that in my manual??????

Gc285

1,216 posts

200 months

Friday 24th November 2017
quotequote all
I just read the Sr4 2006 manual and it indeed says adjust height with spring platform, What I described is for SR1 which I thought was a 4 renamed. Do you not have adjustable pushrods on the front?
Send a note to Josh or Darcy, they will know.

Josh Smith

437 posts

243 months

Friday 24th November 2017
quotequote all
Hi,

I assume you are on Intrax dampers?

The early pre-high downforce cars didn't have adjustable push rods although some were converted.

If you have adjustable push rods then ride height is adjusted with those and the spring platforms are purely for preload.

If you don't have adjustable push rods then ride height is adjustable with the spring platforms.

If your springs say 100-95 then they are 100mm in length with a spring rate of 95N/mm (just over 540lbs/inch). Radical and other spring suppliers can supply different lengths if that's what you are after.

Just remember that the front splitter will sit lower than the chassis rail height that you are currently measuring.

Josh


Gc285

1,216 posts

200 months

Friday 24th November 2017
quotequote all
Thanks josh

captainpugwash

Original Poster:

110 posts

111 months

Friday 24th November 2017
quotequote all
Josh Smith said:
Hi,

I assume you are on Intrax dampers?

The early pre-high downforce cars didn't have adjustable push rods although some were converted.

If you have adjustable push rods then ride height is adjusted with those and the spring platforms are purely for preload.

If you don't have adjustable push rods then ride height is adjustable with the spring platforms.

If your springs say 100-95 then they are 100mm in length with a spring rate of 95N/mm (just over 540lbs/inch). Radical and other spring suppliers can supply different lengths if that's what you are after.

Just remember that the front splitter will sit lower than the chassis rail height that you are currently measuring.

Josh
That's brilliant! Thanks a lot smile