Outer Limits 4x4 Board

Posted: **Fri Sep 14, 2007 3:53 pm**

Own a 82 4 door Rangie with GQ diffs... just wondering what spring rates people have used with this conversion? i was thinking along the lines of 200 front an 240 rear... the car has a bar up front (no winch, yet) single battery soon to be dual battery system an was going to use a 3" lifted spring.

Posted: **Fri Sep 14, 2007 4:09 pm**

It's easy to work out.
Weigh the front half, take a punt on the unsprung weight.

Spring sag = Sprung weight (in lbs)/(2x spring rate)

Simple example.
1000lb unsprung weight, 200lb/in springs.
sag = 1000/(2x200)
sag = 2.5 inches.

Posted: **Sat Sep 15, 2007 3:40 am**

How much the Rover body and chasis weight ..?

Posted: **Mon Sep 17, 2007 6:43 pm**

i have 210 in the front of my disco they are pretty soft i used lovel 80 series progressive rate fronts allround initialy then swapped the rears for ironmans

Posted: **Mon Sep 17, 2007 6:52 pm**

Tapage wrote:How much the Rover body and chasis weight ..?

Don't know what the axles and wheels weigh. But my rangie with 4BD1T and Isuzu gearbox has 1130kg on the front wheels.

I run 180 lb/in springs with the bottom seats flipped (gives 30mm extra height). Rears are also 180lb/in but the pneumatic 3rd spring helps them out.

Posted: **Tue Sep 18, 2007 1:22 am**

KiwiBacon wrote:
Tapage wrote:How much the Rover body and chasis weight ..?
Don't know what the axles and wheels weigh. But my rangie with 4BD1T and Isuzu gearbox has 1130kg on the front wheels.

I run 180 lb/in springs with the bottom seats flipped (gives 30mm extra height). Rears are also 180lb/in but the pneumatic 3rd spring helps them out.

I tought you need a little more spring rate in front .. don't you ?

Posted: **Tue Sep 18, 2007 10:19 am**

Tapage wrote:
I tought you need a little more spring rate in front .. don't you ?

It seems to work very well, the stock springs were around 130lb/in, I have some 240lb/in ones but the ride suffers and front axle articulation was reduced.
I can change the compression damping in my front koni shocks so I can get away with softer springs than most.

Posted: **Tue Sep 18, 2007 11:38 pm**

KiwiBacon wrote:
Tapage wrote:
I tought you need a little more spring rate in front .. don't you ?
It seems to work very well, the stock springs were around 130lb/in, I have some 240lb/in ones but the ride suffers and front axle articulation was reduced.
I can change the compression damping in my front koni shocks so I can get away with softer springs than most.

And you are thinking get ones around 200lb/in .. ?

Posted: **Wed Sep 19, 2007 10:09 am**

Tapage wrote:
KiwiBacon wrote:
Tapage wrote:
I tought you need a little more spring rate in front .. don't you ?
It seems to work very well, the stock springs were around 130lb/in, I have some 240lb/in ones but the ride suffers and front axle articulation was reduced.
I can change the compression damping in my front koni shocks so I can get away with softer springs than most.
And you are thinking get ones around 200lb/in .. ?

My engine is significantly heavier than the original petrol V8. I suspect even with a winch, winch bumper and such on a petrol rangie, the front end on mine will still be heavier.

Posted: **Wed Sep 19, 2007 11:50 pm**

Just for reference the front coil rate for 80 diesel series are 220lb/in .. how much heavy it's your front ?

Posted: **Thu Sep 20, 2007 2:25 pm**

Tapage wrote:Just for reference the front coil rate for 80 diesel series are 220lb/in .. how much heavy it's your front ?

Do you know the front axle weight of an 80 series diesel? Mine vehicle is approx 1130kg.

Posted: **Fri Sep 21, 2007 12:02 am**

KiwiBacon wrote:
Tapage wrote:Just for reference the front coil rate for 80 diesel series are 220lb/in .. how much heavy it's your front ?
Do you know the front axle weight of an 80 series diesel? Mine vehicle is approx 1130kg.

The 1HD-T engine alone w/o oil around 800 lbs ..

Outer Limits 4x4 Board

What spring rates for a Nizrover

What spring rates for a Nizrover