Rear wheel pushing forward when lowered

Jun 23, 2011
623
0
Inverurie
To reduce roll as much as possible on an LCR you need:

Coilovers wound down. :think: hmm
Front and Rear ARBs on stiff setting. check
Front upper strut brace, rear brace also. :think: hmm
Fully polybush the car underneath. check

That will be night and day over standard.

2 outta 4 :S !

the purpose of struts i always thought was to keep the bonue of suspension to a min , ie when going over bumps (mainly for the use of rally cars etc) to keep speed going :shrug:
 

Muttley

Catch that diesel!
Mar 17, 2006
4,987
31
North Kent
Strut braces are to improve the stiffness of the shell and make the handling more predictable.

Lowering the suspension of a Mk.4 Golf platform drops the roll center by much more than the center of gravity, increasing the roll moment arm and the force lifting the inside wheel when cornering. Stiffening up the ARB only stops body roll, with lowered suspension you will lift the inside wheel sooner than with suspension at standard height.

Improved handling is not just about making the car stiffer and reducing roll. It's about being able to go round corners faster, and reducing the adhesion weight on the inside wheels won't help.
 
Jun 23, 2011
623
0
Inverurie
It wasn't meant to be related lol, just an added comment for you to go get some ;)

:rofl: haha ... might do , not caring about comfort anymore tbh , with fitting engine/dogbone mount cars vibrates anyway so may as well get some nice handling + lowness , prob just get the weitec GT kit
 

Dan1720v

Active Member
Feb 28, 2010
1,928
2
Street, Somerset
Strut braces are to improve the stiffness of the shell and make the handling more predictable.

Lowering the suspension of a Mk.4 Golf platform drops the roll center by much more than the center of gravity, increasing the roll moment arm and the force lifting the inside wheel when cornering. Stiffening up the ARB only stops body roll, with lowered suspension you will lift the inside wheel sooner than with suspension at standard height.

Improved handling is not just about making the car stiffer and reducing roll. It's about being able to go round corners faster, and reducing the adhesion weight on the inside wheels won't help.

To an extent, however, by limiting suspension droop on the rear can be a way of reducing understeer in the corners. Have a look at the 172/182's for an example. Lifting the rear wheel was actually a design.
 
Jun 23, 2011
623
0
Inverurie
anyone know the site to order them rear brackets?

and anyone got any info on them? ie would i lose handling ? possible problems or anything? anyone know?

ordering some coilovers soon (weitec GT kit)
 

csd_19

Full Member
May 11, 2005
2,270
28
Angus / Edinburgh
Need a rear end alignment after fitting those then - original rear beam brackets are slotted to allow some movement. Hence why when you do rear beam bushes you remove the beam and leave the brackets in place. ;)

Also wonder what it does to the rear end behaviour, if it lowers the original pivot point of the beam then the rear bushes will be under more torsion as the beam arcs. Probably too small a height difference to make a difference to the sceners I guess (show > handling)
 

csd_19

Full Member
May 11, 2005
2,270
28
Angus / Edinburgh
cool cheers , so lowering 40-50 would be the best (thats from standard leon, ie what companys selling sus say from :p) haha

If you're going for coilies best way to do it is take a measurement from the top of the arch to the ground on each wheel, then adjust the coilies (once fitted) to go -25 -30mm from the measurements.
 

Rgm racer

Active Member
Sep 22, 2009
317
0
Wull covered a lot of suspension details/mods on some of his threads, iirc the drop was 20-25mm from stock to keep the handling good.

Too low and you begin to encounter issues with bump steer and the car's centre of gravity will rise, messing up the handling.

Then again if your driving style is low and slow, you're not bothered about how it handles :)

If you lower suspension/car surely this lowers centre of gravity?
 

Muttley

Catch that diesel!
Mar 17, 2006
4,987
31
North Kent
Lowering the suspension of the Golf Mk.4 platform lowers the roll center by twice as much as it lowers the CofG - so the roll moment is increased. As I indicated in April, above.
 
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