Suspension

Big ginge 82 · Aug 24, 2021

Evening all
I'm new on here so bare with me
I'm starting a rebuild on my c reg 90 galv chassis etc
I'm putting a plus 3 inch kit on it as part of the rebuild but was after some advice on what load rating to use on the springs to get the 90 to sit as level as poss front to back
Any advice much appreciated
Regards chris

payydg · Aug 24, 2021

Big ginge 82 said:
Evening all
I'm new on here so bare with me
I'm starting a rebuild on my c reg 90 galv chassis etc
I'm putting a plus 3 inch kit on it as part of the rebuild but was after some advice on what load rating to use on the springs to get the 90 to sit as level as poss front to back
Any advice much appreciated
Regards chris

My advice is don't lift it at all. It really ****s the handling. It'll roll like a bastard. Put any weight up top and it'll roll like a ****ing bastard. The load rating depend on how you'll be landing it.

300bhp/ton · Aug 25, 2021

Big ginge 82 said:
Evening all
I'm new on here so bare with me
I'm starting a rebuild on my c reg 90 galv chassis etc
I'm putting a plus 3 inch kit on it as part of the rebuild but was after some advice on what load rating to use on the springs to get the 90 to sit as level as poss front to back
Any advice much appreciated
Regards chris

Why a 3" lift? That is rather extreme, are you planning on monster truck tyres?

Knappster · Aug 25, 2021

The axles and diffs will still be the same height from the ground unless you fit taller tyres. Personally, I’d replace the existing springs and shocks with decent ones like OME or genuine. They will sit slightly higher than sagging aged ones but you will get a much better ride. However, it’s your vehicle so go with what suits you. Remember to factor in castor corrected arms, etc for a three inch lift.

300bhp/ton · Aug 25, 2021

Knappster said:
The axles and diffs will still be the same height from the ground unless you fit taller tyres. Personally, I’d replace the existing springs and shocks with decent ones like OME or genuine. They will sit slightly higher than sagging aged ones but you will get a much better ride. However, it’s your vehicle so go with what suits you. Remember to factor in castor corrected arms, etc for a three inch lift.

Bumper, rear crossmember, chassis and gearbox will be higher from the ground though. Which could be valid reasons, depends on the use case really.

As for shocks, this also depends on the end goal. Genuine shocks are ok as a middle ground and will work well in most situations, but they can be a compromise if you are tailoring the vehicle for a specific use. The biggest limiting factor off road is the shock length. Especially on the rear, where the standard shocks do limit the amount of suspension droop available. OME make some good shocks, but there is a wide variety of options with them. As a rule shocks shouldn't really impact ride height, unless they are gas filled and want to expand on their own. But shocks shouldn't 'sag'.

Castor corrected arms might also be an option, but they also create other problems, which might not be desirable either.

Turboman · Aug 25, 2021

300bhp/ton said:
Bumper, rear crossmember, chassis and gearbox will be higher from the ground though. Which could be valid reasons, depends on the use case really.

As for shocks, this also depends on the end goal. Genuine shocks are ok as a middle ground and will work well in most situations, but they can be a compromise if you are tailoring the vehicle for a specific use. The biggest limiting factor off road is the shock length. Especially on the rear, where the standard shocks do limit the amount of suspension droop available. OME make some good shocks, but there is a wide variety of options with them. As a rule shocks shouldn't really impact ride height, unless they are gas filled and want to expand on their own. But shocks shouldn't 'sag'.

Castor corrected arms might also be an option, but they also create other problems, which might not be desirable either.

Guessing that a 3" lift is going to put quite a bit of extra load on the propshafts too?

Suspension

Big ginge 82

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payydg

Well-Known Member

300bhp/ton

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Knappster

Well-Known Member

300bhp/ton

Well-Known Member

Turboman

Mab An Gov

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