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Can I run 4 inch coils with 6 inch 3rds arms?

Posted: Fri Feb 19, 2010 8:08 am
by morewheeldrive
What I mean is can I put some super flexy 5 inch coils in my gq which will probly sag to 4 inch with my 3rds arms that I got for 6-7 inch lift?

Posted: Fri Feb 19, 2010 5:17 pm
by nastytroll
yes, I have been running 6" 2dextreme arms with 4" lift in 2 different GQ's for over 5 years. A little extra caster will not hurt, some prefer it.

Posted: Fri Feb 19, 2010 6:08 pm
by big lux
nastytroll wrote:yes, I have been running 6" 2dextreme arms with 4" lift in 2 different GQ's for over 5 years. A little extra caster will not hurt, some prefer it.
X2 i ran 6inch lift 3rds arms on my gq with 4 inch coils for 6 mnths was fine.

Posted: Fri Feb 19, 2010 10:07 pm
by SuperiorEngineering
I am going to be different with the last 2 posts here.
One very common problem with nissan's and headshake is having arms fitted with not enough lift. eg 6 inch arms with 4 inch lift.
as soon as their is any wear in parts you will ussually get headhsake problems.
tire size make a difference as well.
generally the larger the tire the smaller the arm can be.
eg. 4-5 inch lift with 32-33 inch tires 4-5 inch arm okay.
4-5 inch lift with 35 inch tires a 3 inch arm is better driving
4-5 inch arm with 37-40 inch tires a 2-3 inch arm is okay a 4-5 inch arm would drive shit .

This is a general rule we use everyday , we have set up hundred's of patrols with this rule of thumb that we worked out ourselves and it works extremely well , their is the odd truck that drive unlike others but the majority are the same.

We have seen nissan diffs totally unmodified and the caster readings are way out compared to factory , this may be why the odd truck is different.

Generally if you go to much caster it will get a headshake when a pothole is driven over and it they do not have enough caster the vehicle will wander.

A properly set up patrol should drive at any speed and you should be able to take your hand of the steering wheel with total confidence that it will not wander or encounter any sort of steering issue ( not encouraging driving no handed :lol: )

Also keep in mind that different manufactures have slight differences in their drop radius arms.

Posted: Sun Feb 21, 2010 12:56 pm
by nastytroll
I was running 37" tyres until a few months ago. Other patrol and this one also run 35" or 315 tyres. I have found more issues running not enough caster then too much.

There was a bloke on the patrol forum with a good suspension back ground that stated why he wanted to run more caster than stock.

If you already have the parts try it and see for yourself.

Posted: Sun Feb 21, 2010 6:51 pm
by SuperiorEngineering
agree 100% you have nothing to lose if you already have the parts , just fit them and see how it drives.

Posted: Wed Feb 24, 2010 8:57 am
by nastytroll
A properly set up patrol will normally pull left (follow camber in road) unless fitted with eccentric trunnion bearings or has had the housing bent. Patrols are built for a zero camber road which is why they scrub the outside edge of the lh front tyre.

Posted: Fri Mar 19, 2010 11:55 pm
by MudMac
Hi everyone .... it's my first post here.
SuperiorEngineering wrote:....
generally the larger the tire the smaller the arm can be.
......


What is a reason of that rule? I mean the tire size has no influence on configuration between chassis mount and axle position - may it make a difference when vehicle is in motion?



Thanks in advance

Regards:
Matthias