PDA

View Full Version : Stock Spring Rates + Aftermarket



alscall
28-07-2008, 05:39 PM
Hi,

Does anyone know what the spring rate is in the AWD's?

Or for that matter, VRX, Ralliart or Exec?

Also if anyone knows the spring rates for King, Lovells & Pedders Lows too it'd be great.

Thanks

Type40
28-07-2008, 06:46 PM
Al, I would give King springs a call in QLD if you want to know details like that. They have been really helpful with me in the past with my various spring questions. Im not sure about Pedders however.

alscall
28-07-2008, 06:50 PM
Yeah, I've emailed them & expect they'll send a reply soon enough.

Mitsubishi & Pedders, however are a little less forthcoming with information. Closest I've got so far from Pedders is "15% firmer than stock"

Hopefully someone here can give me exact rates, or point me in the right direction at least, so I can find out for myself.

alscall
03-08-2008, 02:50 PM
OK, There doesn't seem to be a lot of definite information out there so here's what I've found out so far. If anyone can fill in the gaps/ correct the info it'd be great.


3rd Gen Exec (Stock Height)
Front 120lb/"
Rear

3rd Gen VRX/ Sports (10mm Drop)
Front 140lb/"
Rear

AWD + AWD Sports (?? Drop)
Front
Rear

Pedders Lows (38mm Drop)
Front 145lb/"
Rear 169lb/"

King Lows + King Lows SPs (45mm + 30mm Drop)
Front 185lb/"
Rear 190lb/"

This is information that I have received from Pedders + Kings (+ Chisholm :D )so far. Lovells have not replied with any definitive answer to date.

If anyone can tell me the 'eyebrow' heights of their cars fitted with these springs, without LPG fitted to their car it'd be great.

Mr_Roberto
03-08-2008, 03:06 PM
the VRX has a 10mm drop

alscall
03-08-2008, 04:55 PM
Updated, Thanks :D

spud100
04-08-2008, 06:38 AM
I've got a set of AWD sports springs in the garage.
When I get a chance I'll measure them and calculate the spring rates.
Give me a couple of days.

However, me feeling is that King's Lows aren't that much stiffer than the staddard fit AWD springs.
Gerry

ar3nbe
04-08-2008, 08:16 PM
Pedders Lows (38mm Drop)
Front 145lb/"
Rear 169lb/"

King Lows + King Lows SPs (45mm + 30mm Drop)
Front 185lb/"
Rear 190lb/"



Those pedders look worrying. Stiffer springs in the rear of the car ? I understand FWD cars need a stiff rear suspension setup inorder to get some serious handling, but, they shouldnt have stiffer suspension in the back, and softer in the front. Thats just wrong.

alscall
04-08-2008, 09:12 PM
I've got a set of AWD sports springs in the garage.
When I get a chance I'll measure them and calculate the spring rates.


That'd be great, thanks. Interested to know if they're different from my exec AWD springs.

alscall
04-08-2008, 09:15 PM
Those pedders look worrying. Stiffer springs in the rear of the car ? I understand FWD cars need a stiff rear suspension setup inorder to get some serious handling, but, they shouldnt have stiffer suspension in the back, and softer in the front. Thats just wrong.

Does seem a bit strange, yes. This is the reply I received when I asked about that.


When Pedders design a lowered coil for an application we do not automatically make it a significantly heavier in rate.



We evaluate the O.E. Coil design and compare it to the existing shock control rates and other variables, then design a lowered coil from this data. now days we often find that the original coil needs more of a “tweak” than a total redesign to gain significant improvements in handling. If a coil is designed with too great an increase in rate or other parameters, it can depreciate the cars handling as the genuine shocks may not be able to handle the increased loads placed on them.



The other thing to be aware of is the quality of the coil build and the materials used to build aftermarket springs when compared to those built for mass production. It really becomes a balancing act between achieving a “lowered look”, with enhanced performance that is still works properly with the rest of the cars suspension. Ultimately every coil is designed on its merits in some cases this requires a significant increase in rate while in others a simple “tweak”.