landcruiser/prado castor help

kdub104 · Post by **kdub104** » Mon Jun 11, 2007 11:26 am

hi guys i have a 93 71 serries prado with ome 2inch lifted coils and shocks and since the new springs it get sa bit of scary bump steer......

do i need to get castor correction bushes?

and to bushes change on the size lift?

and will i need adjustable panhard bars or am i safe?

thanks guys hoping someone has had similar issues and can help me on this.

Clint · Post by **Clint** » Mon Jun 11, 2007 1:39 pm

Remember that trigonometry stuff from skool? you can work out stuff like that...

Ya need 2.5 - 3 degrees. The amount of correction needed does increase with lift. Be aware that the offset bushes will flog out quicker than std ones.

You shouldn't need adjustable panhards with a 50mm lift, you've only shifted the axles over about 1.2mm

If you're getting 'scary bump steer' you might have other issues, a 50mm lift on a coil sprung rig won't do bugger all to cause bump steer in the true sense of the term. All you should get is a bit of instability due to the reduced caster angle. My prado got a bit more wandery when I lifted it 40mm, but it certainly isn't 'scary' Check all your suspension bushes & steering linkages for wear.

I'm looking at making some new front arms for mine, to correct the caster angle and to get some more strength as I've bent mine twice already.

Cheers
Clint

wjw · Post by **wjw** » Mon Jun 11, 2007 3:16 pm

Bent ones arent certable anymore

we were going to with mine... luckily we asked first...

oldblue · Post by **oldblue** » Mon Jun 11, 2007 3:31 pm

Toyota's use about 90mm backspace on there wheels, if you have decreased this , it may injuice bumpsteer.
I know of guys with 3"+ lifts , with not problems.

Clint · Post by **Clint** » Mon Jun 11, 2007 4:28 pm

wjw wrote:Bent ones arent certable anymore we were going to with mine... luckily we asked first...

It'd probably take a skilled eye to spot a 2.5 deg bend tho. When I first heard of people cold bending prado radius arms to correct caster I thought they were nuts - the bends in mine were trail damage, not intentional - Now I know how soft they are I'd do it quite happily.

Cheers
Clint

oldblue · Post by **oldblue** » Mon Jun 11, 2007 5:47 pm

Toyota must of realised how soft the arms were, my 1993 arms are a lot smaller in cross section than the 1995-96 Prado's, prob about 30%

kdub104 · Post by **kdub104** » Thu Jun 14, 2007 9:06 am

thanks for youre help guys.....

CLINT are those rims on youre prado 8inch? i did have some 10 inch rims but i think they are gona stick out too far and rub what do you think?

cheers again dudes

Clint · Post by **Clint** » Thu Jun 14, 2007 10:11 am

kdub104 wrote:thanks for youre help guys.....

CLINT are those rims on youre prado 8inch? i did have some 10 inch rims but i think they are gona stick out too far and rub what do you think?

cheers again dudes

Yep 8 inch, they seem to work OK. if the tyres are the same & the backspacing is right 10" rims shouldn't make the wheels stick out any more than 8" ??

The 8" should hold the tyre on the bead offroad a bit better, 10" should give a little more stability on road.

Cheers
Clint