Aluminum VS Polyurethane

Post by **bn_sil80** » Mon Oct 20, 2008 10:02 am

Hey guy's going to do a 2 or 3 inch body lift on my '92 Triton. I can get aluminum spacers machined up pretty cheap. Just wondering what would be better, poly or alloy. I just have this image in my head that the poly will flex like hell.

I'm going to get under the car and count the mounting points, also maybe take one out to measure the OD and internal hole. Do you guys think 2 inches or 3?

Post by **macca81** » Mon Oct 20, 2008 10:56 am

poly will need a crush tube in it... but if you can get alum cheap, get that for sure

Post by **Ruffy** » Mon Oct 20, 2008 11:56 am

HDPE. High density poly ethelyne is what you need. Poly urethane will not be any good.
Aluminiun will be fine.
Which ever you can get cheapest/easiest

Post by **macca81** » Mon Oct 20, 2008 3:02 pm

polyurethane is what many blocks are made from... superior use urethane with a crush tube

Post by DK » Mon Oct 20, 2008 5:17 pm

Ally if you can get it or if you want poly look for something like Acetal

To answer your other Q i would never go any higher than 2"

Post by **joeblow** » Mon Oct 20, 2008 5:34 pm

also realise that poly etc won't be passed by most engineers etc in victoria.

Post by **ISUZUROVER** » Mon Oct 20, 2008 5:39 pm

joeblow wrote:also realise that poly etc won't be passed by most engineers etc in victoria.

Likewise, DOT in Qld will only approve metal lift blocks AFAIK - and only up to 2". Just FYI in case you ever move to QLD like most Mexicans are doing

Post by **nastytroll** » Mon Oct 20, 2008 5:47 pm

DK wrote:Ally if you can get it or if you want poly look for something like Acetal

To answer your other Q i would never go any higher than 2"

Acetal cracks, so I doubt an engineer will pass it. It also absorbs water.

Body blocks need to be made from a material that does not split or rub away.

Maybe UHMDPE, Ultra High Molecular Density Poly Ethelene.

I used 6000 series ally and had to change to poly and crush tube to get it aprooved. There reason was they could not varify what grade of ally it was.

Post by **-Scott-** » Mon Oct 20, 2008 6:03 pm

nastytroll wrote:I used 6000 series ally and had to change to poly and crush tube to get it aprooved. There reason was they could not varify what grade of ally it was.

OK, time to show my ignorance. Can somebody explain why it matters which grade of aluminium? Serious question - I don't understand.

Post by **shakes** » Mon Oct 20, 2008 6:16 pm

-Scott- wrote:
nastytroll wrote:I used 6000 series ally and had to change to poly and crush tube to get it aprooved. There reason was they could not varify what grade of ally it was.
OK, time to show my ignorance. Can somebody explain why it matters which grade of aluminium? Serious question - I don't understand.

an un-educated guess -> different grades have different property's ie, one will stress crack and shatter from vibrations very easily, while another will deform alot more elastically, ie crush down and then the bolts will become loose.

bn_sil80 - fit the minimum lift in you can to fit the tires you want. I'm also guessing you havent thought about things possibly needed such as.. extending gearar shifter's clutch/brake lines, moving the radiator etc?

Post by **want33s** » Mon Oct 20, 2008 6:36 pm

ISUZUROVER wrote:
joeblow wrote:also realise that poly etc won't be passed by most engineers etc in victoria.
Likewise, DOT in Qld will only approve metal lift blocks AFAIK - and only up to 2". Just FYI in case you ever move to QLD like most Mexicans are doing

Qld T'port WILL approve non metal blocks.
Just Cruizin has sold heaps of them for Suzuki's.
Lux89 got his hilux lift approved only a week ago with plastic type blocks.

Jas.

Post by **bn_sil80** » Mon Oct 20, 2008 6:45 pm

Thanks heaps for all the responses guys. I have thought of all the necessary mods such as brake lines and rad hoses, but never thought about the gear selector. I'll go 2 inch I think. I just go my first set of muddies - MT117 Xtremes 33x10.5's and I have very minimal clearance. I trimmed the outer guard and gets VERY close to the inside wheel arch.

I'll get the blocks made up in 3 weeks when my old man gets back to Melb.[/i]

Post by **ISUZUROVER** » Mon Oct 20, 2008 7:02 pm

want33s wrote:
ISUZUROVER wrote:
joeblow wrote:also realise that poly etc won't be passed by most engineers etc in victoria.
Likewise, DOT in Qld will only approve metal lift blocks AFAIK - and only up to 2". Just FYI in case you ever move to QLD like most Mexicans are doing
Qld T'port WILL approve non metal blocks.
Just Cruizin has sold heaps of them for Suzuki's.
Lux89 got his hilux lift approved only a week ago with plastic type blocks.

Jas.

Are they metal sleeved?

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