Thread: 30 mm bump stop gap on a 110 - Why?

Why space the bump stop for a 2" lift?
That's where you've gone wrong!!!

And TF springs are pretty ordinary at the best of times.

A 2" longer shock is safe with standard mounts. Not sure why you've done what you have..

Thanks for your reply Tombie.

I hope i have made a mistake! It would be easy to fix!

The closed length of the standard LR front shock is 330 mm (550 mm open). The closed length of the Terrafirma shock is 50 mm more at 380 mm (600 mm open). So don't the bump stops need to be extended 50 mm to prevent the TF shock from bottoming out on compression?

Edward

The TF springs had probably started to sag as soon as they left the factory.

Your mate gave them to you as he wouldn't be able to look you in the eye if he sold it to you. What was the reason for your mate to only use them for 20,000Km and then get rid?

His intentions were good. The set up was too firm for him (the fronts especially) and they caused problems with the driveline angles on his Puma.

Edward

I suspect the wieght of the motor and accessories is making a difference.
Your V8 vs a puma motor(dura-what's it).
Does the front look like it's been lifted or heavily nose down when you stand back?

I'm with Tombie, remove the bumps stops to give you close to the same gap as the rear.
Do you remember what the gap was with original suspension?
30mm is simply not enough.
It may be worth dropping the lower shock mount and measuring the 50mm of length is available on compression within the shocker.
As side note I've only seen bump stops extended on 70mm+lifts subject to spring rates and shocker choice.

You have the numbers you need.
Your new dampers have a closed length of 380mm so take a tape and measure the distance that the damper is at static height. Subtract 380 from that and you have your clearance to crash. Optimise your bump clearance to match crash clearance taking into account that you will get 20mm ish of bump compression on the big hits.

If after doing these measurements you are not happy with your clearances well then you need longer springs or higher rate springs?

S

Originally Posted by alien

I suspect the wieght of the motor and accessories is making a difference.
Your V8 vs a puma motor(dura-what's it).
Does the front look like it's been lifted or heavily nose down when you stand back?

I'm with Tombie, remove the bumps stops to give you close to the same gap as the rear.
Do you remember what the gap was with original suspension?
30mm is simply not enough.
It may be worth dropping the lower shock mount and measuring the 50mm of length is available on compression within the shocker.
As side note I've only seen bump stops extended on 70mm+lifts subject to spring rates and shocker choice.

Thanks for the tips alien.

The front has just a slight nose-down look - what i'd consider normal. I measured all the hub to flare heights and the truck is sitting nice and even.

Edward

Originally Posted by roverrescue

You have the numbers you need.
Your new dampers have a closed length of 380mm so take a tape and measure the distance that the damper is at static height. Subtract 380 from that and you have your clearance to crash. Optimise your bump clearance to match crash clearance taking into account that you will get 20mm ish of bump compression on the big hits.

If after doing these measurements you are not happy with your clearances well then you need longer springs or higher rate springs?

S

Thanks for the tip roverrescue. It seems so straightforward now that you say it. I'll measure it up and report back.

Edward