Body lift .. Metal or High Density Poly

[rainsey]

Howzit all,

Say folks... whats the go with body lifts... plastic vs metal. Being NSW based is there any specific legalities on either... is the poly(fill in the blanks) better for the perceived resilience... or metal better for the strength and longevity.

Yours Confused

Rainsey

[mtzook]

Both work fine. You've gotta have bushings on one end of it anyway, as they do almost all of the work of absorbing the shock. Most people use box steel if you can't replace the bolts with longer ones (vitaras), or because it's cheap and you can get it anywhere. Poly is fine because it lasts a long time, but you can only use it if you can use a longer bolt instead of stock. I've had metal engineered no probs, and i don't think poly has any problems. I think it's more of a choice as they're pretty much as stong as each other.

Either way, 2" should be about the max you'll wanna do because of body/chassis flex.

[Tiny]

Very few poly type compositions are engineerable, regardless I think they will both be successfull, but I will only sell the alloy ones for my peace of mind and you will def have no probs with the engineer*

*IMO anyway

[fatassgq]

alloy ones can have probs with corrosion when put up against the steel body.
Polyurethane can only be used with crush tubes.

We have spoken with transport department up here (qld) and while they would prefer steel or ally they said at this stage there is no reason that poly with a crush tube cannot be approved up to 2" of lift.

Cheers
Brian

[fatassgq]

alloy ones can have probs with corrosion when put up against the steel body.
Polyurethane can only be used with crush tubes.

We have spoken with transport department up here (qld) and while they would prefer steel or ally they said at this stage there is no reason that poly with a crush tube cannot be approved up to 2" of lift.

Cheers
Brian

[bruiser]

yes spoke to department of transport 2 days ago and they said poly was ok.
actually asked twice to make sure and...ok.
but what I would like to know as well regarless of legal aspects as has been asked, what is the best type for your truck.................................

[fatassgq]

I would say after factoring in cost etc then polyurethane with a crush tube comes out on top.

As I said alloy can have corrosion probs and will usually cost a fair bit more.

This really is a personal preference mate as both are legal and have there own pro's and con's.

[DVS-4x4]

i used boat rollers cut them in half with the lathe they look identical to the ones my mate bought ive had them in for a few months now and at three inches there hav been no snapped bolts or any problems there is a bit more flex i thuoght but like i said no probs

[muddyperils]

I used POLLY ones in my MQ thrasher, they have been in for around six years and are not showing any signs of where or breakdown what so ever!!!
personaly if the polly ones can be legal I would not buy any others....
If you know any one in the manufacturing industry buy a meter of the POLLY and get them to saw it up for ya and buy the high tensile bolts ya self saves HEEPS...