Thread: Shock Lenghts and rates for a D2 50mm Lift

I'd be looking at about 220-230lb/in front springs for sure. There isn't a lot of benefit in going stiffer unless you like that type of ride. For the rears those also look to be a good compromise between empty and loaded running.

For shocks, it depends on how much control you like on the suspension and how much you will compromise the ride for that control. For a light D2, 360/80 linear rate is right on the money. Be careful that those buggy shocks (7100 etc) dont come with a bullnose curve shock curve, the rates are only a peak value of the shock, just like a power curve only tells you the peak power of an engine - but nothing about how the rest is delivered. Fronts would probably be very good at the 275/78 spec.

For a stiff ride or full laden heavy touring then 400/100 rear, 360/80 fronts - but be aware it will stiff when empty for all of that control.

Lengths, for those springs you'd be at standard shock lengths or just a fraction longer.

Also, I'm not sure what the 5150's and 7100's are like for fit, you may have to make to mods to make them go, but I wouldn't fit the rose jointed shock ends. I run the 6100 and flogged out the rose joint ends in no time, setting up an annoying rattling noise. I ended up having Bilstein cut them off and replace them with small dia bush ends. The rose joints will also make fitting the front shock a PITA. The rose joints are relatively expensive to replace (about $50 per bush) and although they last longer than a rubber bush, they have nothing that is remotely near the life of a polyurethane bush from my experiences.

Also, to add debate, I don't think that with this suspension setup that there is any gain to running remote canisters. In the Bilstein you pretty much cant fade them anyway as the gas is seperated from the oil, even running over GVM with stiff springs, stiff shock valving through desert terrain or endless corrugations (I've tried) although they do get hot! The remote canisters do increase the oil capacity, but the biggest boon in my books is that they provide extra travel as the gas section is removed from the area at the bottom of the shock pistons travel, and so allowing more room for shock travel than an equivilent sized Bilstein. In a 2" lifted vehicle, you're still operating within the normal limitations of the springs free length and the bumpstop, and so there any extra travel that is available in the shock from going to remote canister isn't actually usable.

Originally Posted by Slunnie

I'd be looking at about 220-230lb/in front springs for sure. There isn't a lot of benefit in going stiffer unless you like that type of ride. For the rears those also look to be a good compromise between empty and loaded running.

For shocks, it depends on how much control you like on the suspension and how much you will compromise the ride for that control. For a light D2, 360/80 linear rate is right on the money. Be careful that those buggy shocks (7100 etc) dont come with a bullnose curve shock curve, the rates are only a peak value of the shock, just like a power curve only tells you the peak power of an engine - but nothing about how the rest is delivered. Fronts would probably be very good at the 275/78 spec.

For a stiff ride or full laden heavy touring then 400/100 rear, 360/80 fronts - but be aware it will stiff when empty for all of that control.

Lengths, for those springs you'd be at standard shock lengths or just a fraction longer.

Also, I'm not sure what the 5150's and 7100's are like for fit, you may have to make to mods to make them go, but I wouldn't fit the rose jointed shock ends. I run the 6100 and flogged out the rose joint ends in no time, setting up an annoying rattling noise. I ended up having Bilstein cut them off and replace them with small dia bush ends. The rose joints will also make fitting the front shock a PITA. The rose joints are relatively expensive to replace (about $50 per bush) and although they last longer than a rubber bush, they have nothing that is remotely near the life of a polyurethane bush from my experiences.

Also, to add debate, I don't think that with this suspension setup that there is any gain to running remote canisters. In the Bilstein you pretty much cant fade them anyway as the gas is seperated from the oil, even running over GVM with stiff springs, stiff shock valving through desert terrain or endless corrugations (I've tried) although they do get hot! The remote canisters do increase the oil capacity, but the biggest boon in my books is that they provide extra travel as the gas section is removed from the area at the bottom of the shock pistons travel, and so allowing more room for shock travel than an equivilent sized Bilstein. In a 2" lifted vehicle, you're still operating within the normal limitations of the springs free length and the bumpstop, and so there any extra travel that is available in the shock from going to remote canister isn't actually usable.

So you would go stiffer shocks in the rear than front? 360/80 sounds very stiff for the rear to me.

Absolutely. The stiffness you will feel through the bump rate on the shock, the rebound you don't really feel. I've tried that rate and thought that it was pretty good, perfect when empty. Looking through the application charts, I guess you've also go to remember that you're comparing a full bodied truck over light weight buggies and utes. The Disco is 1.1T over the front with a Bar, and 1.2T over the rear before you put anything in, with the stiffer rear springs and greater overhung load needing more rebound control.

All of this said, if you think the 360/80's are going to be too stiff then absolutely for something lighter. If you don't like it you can get them revalved in syd for about $150/pr.

Originally Posted by Slunnie

Absolutely. The stiffness you will feel through the bump rate on the shock, the rebound you don't really feel. I've tried that rate and thought that it was pretty good, perfect when empty. Looking through the application charts, I guess you've also go to remember that you're comparing a full bodied truck over light weight buggies and utes. The Disco is 1.1T over the front with a Bar, and 1.2T over the rear before you put anything in, with the stiffer rear springs and greater overhung load needing more rebound control.

All of this said, if you think the 360/80's are going to be too stiff then absolutely for something lighter. If you don't like it you can get them revalved in syd for about $150/pr.

No worries, I am glat you let me know the weights. Do you know the lenght of a stock D2 shock?

Also, my user name and password has expired for D2au

Originally Posted by Maggot4x4

No worries, I am glat you let me know the weights. Do you know the lenght of a stock D2 shock?

Also, my user name and password has expired for D2au

For D2Au the forum or Yahoo group? For the forum you may ave to chat to Will, I cant do much on there.

Shock length I'm not sure. I think it's something around 590mm but I'm not definate about that. Front to rear is aso marginally different.

Originally Posted by Slunnie

For D2Au the forum or Yahoo group? For the forum you may ave to chat to Will, I cant do much on there.

Shock length I'm not sure. I think it's something around 590mm but I'm not definate about that. Front to rear is aso marginally different.

Yahoo group I ment.

Cheers Simon