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Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 2:20 pm
by macjohnw
Just got a quote back from Stofpad, he does not have a design for my Gen3 yet:

Front: R900
Rear: Up to R2200 - depending on the size

Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 2:26 pm
by SimonB
macjohnw wrote:Just got a quote back from Stofpad, he does not have a design for my Gen3 yet:

Front: R900
Rear: Up to R2200 - depending on the size
Offer your vehicle for R&D. He might give you a decent discount on the finished product

Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 2:41 pm
by CATS
Impossible for the rear to be that expensive, unless I am missing something ?

As I understand it we need a ring shaped metal piece about 4mm thick that will fit above the coil inside the coil housing. Surely it can't cost that much?

CATS

Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 5:46 pm
by jaco_n
I'm confused and can't seem to get an answer. Are you saying it is possible to add a spacer to the Gen 3?I asked this before and was told due to it being a unibody it is not possible.
Will the addition of spacers increase the ground clearance?

Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 5:46 pm
by jaco_n
I'm confused and can't seem to get an answer. Are you saying it is possible to add a spacer to the Gen 3?I asked this before and was told due to it being a unibody it is not possible.
Will the addition of spacers increase the ground clearance?

Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 6:44 pm
by Davidvan
Simon, my Paj is going for the R&D next week will chat with Uys. The cost is based on Billet for the rear, will see what options and size and definately find a cost effective solution which we can all make use of.

Jaco it is not a body lift, just same effect as coil replacement or suspension upgrade, at cheaper cost. It should improve approach, breakover and departure angles, but the clearance under the vehicle ( diff, etc) is only increased by larger tyre size.

Re: Van Zyls Springs, shocks and spacers?

Posted: Tue Nov 08, 2011 7:27 pm
by Bostokkelos
David your theory on the app, dep and cross over ang is correct. but the theory on the diff hight that stays the same is only true for cars with a life axel at the back, where the body of the car rests on a tubular chassis, where the car goes up but the rear axel remains the same height, given the fact that the height off the ground is determend by the tyres. BUT on a full independent rear suspension where the suspension is attached to a fixed point on the car, your diff height would increase as well, moving up with the car working on the same principle as your and my front suspension where the lowest part of the car in front(sump) moves up with the car. Thus a Gen 3 and 4 would have total increase in height., cause your rear diff doesnt move away from your body as the life axel setup, but up with the car. Well this is my view, inputs welcome.

Re: Van Zyls Springs, shocks and spacers?

Posted: Wed Nov 09, 2011 7:54 am
by pierreandre
I agree with Bostokkelos, you do get more ground clearance. However, with spacers, you might decrease the total amount of suspension travel (articulation), because you may never reach the bump stop as the coil may be fully compressed before then. Since its a progressive coil, you don't even have to compress it fully before this happens. I the car is unladen, you might never reach the bump stop if the spacers are too thick. This whole scenario depends on how stiff the coils are and how much "extra" travel they have.

The other thing that happens when lifting the pajero, regardless of the method (spacers, OME etc), is that you lose drop travel, because the suspension is no longer in the center of its range of travel. In other words, there is less available travel for the wheel to drop into holes. You might find your wheels spend slightly more time in the air.

Both these arguments are very theoretical, :ugeek: and I reckon the best way to avoid problems is to not overdo the lift. I'm sure one of the clever suspension experts (Gerrit) will be able to tell us how much lift is achievable without degrading the performance.

Re: Van Zyls Springs, shocks and spacers?

Posted: Wed Nov 09, 2011 8:19 am
by Bostokkelos
"because you may never reach the bump stop as the coil may be fully compressed before then. Since its a progressive coil, you don't even have to compress it fully before this happens."

Pierre, I am not sure of the Gen models but on the Sport I have a bump stop on top ans well as on the bottom. As it was a concern, i tested it. Down travel is not a problem, the car still have all the down travel to the bump stop, in fact its happens easier due to the fact that the spacer (when there are no weight on the wheel) compresses the spring down forcing the wheel down. But when the cars weight is on the wheel it forces the car up(thus the "lift) as the wheel is on the ground and cant be pushed down. its the "up" travel that is actually a bit less on my car ( because of the reasons you mentioned) Due to the fact that the spring is under more tension, and lost 16mm of upwards movement.

Re: Van Zyls Springs, shocks and spacers?

Posted: Wed Nov 09, 2011 8:39 am
by pierreandre
Bostokkelos wrote:"because you may never reach the bump stop as the coil may be fully compressed before then. Since its a progressive coil, you don't even have to compress it fully before this happens."

Pierre, I am not sure of the Gen models but on the Sport I have a bump stop on top ans well as on the bottom. As it was a concern, i tested it. Down travel is not a problem, the car still have all the down travel to the bump stop, in fact its happens easier due to the fact that the spacer (when there are no weight on the wheel) compresses the spring down forcing the wheel down. But when the cars weight is on the wheel it forces the car up(thus the "lift) as the wheel is on the ground and cant be pushed down. its the "up" travel that is actually a bit less on my car ( because of the reasons you mentioned) Due to the fact that the spring is under more tension, and lost 16mm of upwards movement.
With bump travel, I meant upwards travel to the top bump stop.
What I meant with less down travel was that raising the suspension uses up some down travel. You still get the full articulcation, but it now consists of more upwards travel and less downwards.

It looks like you got the following results:
Lift: 45mm? (If I remember correctly)
Upwards travel: +45mm - 16mm = 29mm
Downwards travel: -45mm

Does that sound right?