Please if you find this site helpful & wish to help with it's funding. Thank You.


Author Topic: Sierra coilover spring rate suggestions  (Read 5056 times)

0 Members and 1 Guest are viewing this topic.

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
    • http://
Sierra coilover spring rate suggestions
« on: September 21, 2014, 14:55:01 PM »
I'm after some suggestions for spring rate and length for coilovers on my xr4x4 24v(BOA) please, ie what are you using and what for?

For now im keeping the arb and the rubber top mounts,its not a daily drive it will probably be mostly road with occasional track use.

I like a good firm ride but the roads round here can be very poor in places and I don't want to crack the windscreen or my spine if I cant dodge a bad pothole.

cheers Col.



Offline robrs2

  • Hero Member
  • *****
  • Posts: 1112
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 31.0 Firefox 31.0
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #1 on: September 22, 2014, 22:06:28 PM »
You will not crack the screen. I have 650lb front and 450lb rears for track use only. Although that seems hard its not to bad. Standard coilovers for road are about 320lb front and 250lb rear.

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #2 on: September 23, 2014, 17:47:22 PM »
thanks rob that's usefull to know,
I don't suppose you know the weight difference between a boa and a 2.9 12v?

I have searched but cant find anything usefull or definite

Offline Heath Robinson

  • Sr. Member
  • ****
  • Posts: 254
  • Karma: +0/-0
  • OS:
  • Mac OS X 10.6 Mac OS X 10.6
  • Browser:
  • Firefox 32.0 Firefox 32.0
Re: Sierra coilover spring rate suggestions
« Reply #3 on: September 24, 2014, 10:24:08 AM »
I'll be interested to hear that too, I tried to track down the weights for them the other day, and came up with 3 different figures for the BOA!

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #4 on: September 25, 2014, 19:57:54 PM »
exactly  :unsure:

Offline v6gerry

  • Hero Member
  • *****
  • Posts: 573
  • Karma: +1/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
Re: Sierra coilover spring rate suggestions
« Reply #5 on: September 25, 2014, 21:56:05 PM »
thanks rob that's usefull to know,
I don't suppose you know the weight difference between a boa and a 2.9 12v?

I have searched but cant find anything usefull or definite

A 24v BOA is 205KG with out flywheel there a post under 24v engine section , hope this helps .

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #6 on: September 26, 2014, 21:45:43 PM »
thanks I looked before and never found it  :rolleyes:  so I looked more, still can only find guestimates not much better for the 12v either
best guess so far is  12v 160ish kg  24v 220ish kg

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #7 on: September 28, 2014, 16:05:20 PM »
I was wondering what ride height you guys are running at ? can I get a few measurements from the center of the alloy engine crossmember to the road please
 4b v6s only especially if you consider it lowered but sensible
thanks

Offline robrs2

  • Hero Member
  • *****
  • Posts: 1112
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 32.0 Firefox 32.0
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #8 on: September 30, 2014, 22:28:46 PM »
There is a measurement but cant find the manual. Rear beam to floor and front cross member to floor.

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Mozilla compatible Mozilla compatible
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #9 on: October 02, 2014, 18:04:38 PM »
you mean the Haynes Rob? iv got the v6 one no sign in there.
 but I bet 90mm on the crossmember is not enough

Offline robrs2

  • Hero Member
  • *****
  • Posts: 1112
  • Karma: +0/-0
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 32.0 Firefox 32.0
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #10 on: October 03, 2014, 22:53:54 PM »
No. cosworth motorsport manual

Offline totsy

  • Advanced Member
  • **
  • Posts: 46
  • Karma: +0/-0
  • Gender: Male
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Chrome 38.0.2125.104 Chrome 38.0.2125.104
Re: Sierra coilover spring rate suggestions
« Reply #11 on: November 10, 2014, 22:09:44 PM »
I've fitted Avo coilovers to my 24v XR4x4. Haven't set it up yet. you'll need to take a sledgehammer to the rear inner arch where the shock is mounted or the spring will get stuck.
 [ You are not allowed to view attachments ]  [ You are not allowed to view attachments ]

Offline scud

  • Sr. Member
  • ****
  • Posts: 329
  • Karma: +0/-0
  • OS:
  • Linux Linux
  • Browser:
  • Safari 4.0 Safari 4.0
    • http://
Re: Sierra coilover spring rate suggestions
« Reply #12 on: November 14, 2014, 23:07:57 PM »
I'll look out for that cheers

 

SMF spam blocked by CleanTalk