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Increasing front track width on LX


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#1 IMORAL

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Posted 11 December 2020 - 10:30 AM

Gents

 

Has anyone increased the track width on the front of a LX?  I know P76 rotors (which I currently have) decrease track width but I am wanting to increase it

 

What options are out there?

 

TIA



#2 yel327

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Posted 11 December 2020 - 10:53 AM

Different wheel offset is the easiest.

#3 IMORAL

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Posted 11 December 2020 - 11:01 AM

Yeah true but that would be too easy.



#4 Bigfella237

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Posted 11 December 2020 - 11:01 AM

I assume you're not simply talking about rim offset or wheel spacers?

 

Just about the only way to (significantly) increase track while maintaining (or even reducing) the scrub radius would be custom (longer) upper & lower control arms (and tie rods to suit of course).

 

You could keep the same control arms and move the pivot points outward but that would mean a custom k-member & steering rack.

 

Both options would be difficult to get engineered and if you're going to that much trouble there are advantages to longer control arms anyway (the longer the arm, the flatter the arc they travel through).

 

Either route would require some fore-thought about the implications to the entire geometry. Spring & shock mounting positions may change, spring rates certainly would, it's real can'o worms type stuff!



#5 IMORAL

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Posted 11 December 2020 - 11:05 AM

Yeah bigfella. I run narrow fronts now and want narrower. Car is flared. I'm already running a large spacer to try and put the wheel further out. I'm trying to avoid a 6" wheel spacer lol



#6 skap

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Posted 11 December 2020 - 11:16 AM

Bike wheels/tyres aren't meant to be used on cars bro.



#7 Bigfella237

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Posted 11 December 2020 - 11:18 AM

Adding spacers is increasing the scrub radius (the arc in which the wheel travels when steering).

 

Generally a large SR is not desirable, it makes the steering heavier (even more so with big castor figures) and means less grip in tight cornering, which you can't really afford to lose with your already narrow front tyres.

 

Watching with interest for any other suggestions...



#8 yel327

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Posted 11 December 2020 - 12:12 PM

Yeah true but that would be too easy.


It is how GMH changed the track between HK and HT by 1”. Simple and easy. Just have to maintain a track within 1” of your original track otherwise you are illegal and possibly uninsured.

#9 rexy

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Posted 11 December 2020 - 01:32 PM

Custom front crossmember.



#10 axistr

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Posted 12 December 2020 - 08:36 AM

The only way to change scrub radius is larger or smaller diameter tyres, rim offset, hub offset, wheel spacers and stub axles with different king pin inclination. Correct KPI and stub axles are very important. HQ stub axles had 7 degrees Torana/A9X 9 degrees. Changing the length of the control arms will not effect the scrub radius. KPI also determines the amount of return to centre of the steering in conjunction with caster. KPI will make the car centre the steering even with zero caster.



#11 kiwi-lilj

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Posted 12 December 2020 - 11:27 AM

Flares and narrow fronts should be treated as a crime



#12 Ice

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Posted 12 December 2020 - 02:26 PM

Agree 



#13 Bigfella237

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Posted 12 December 2020 - 08:13 PM

~ Changing the length of the control arms will not effect the scrub radius. ~


Yeah sorry, I didn't mean to imply that they would by themselves, but Paul was talking about going with skinnier front wheels again, which would likely have less offset, which would reduce SR.



#14 UCSLE

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Posted 13 December 2020 - 08:28 AM

If only it was a LJ

 

I increased the front track on my LJ but to get the wheels under the guards i used lots of camber .

 

Using the least amount of camber needed on your LX should get the top of wheel out in the guard a little 

 

Attached File  lj1.jpg   192.78K   2 downloads

 



#15 Statler

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Posted 13 December 2020 - 07:55 PM

Put spacesavers on the front .......... or Mightyboy rims . :)



#16 claysummers

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Posted 13 December 2020 - 08:10 PM

Run sensible wheels or put up with the look, but don’t fnck with suspension geometry for looks.


Sent from my iPad using Tapatalk

Edited by claysummers, 13 December 2020 - 08:12 PM.


#17 BENN0

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Posted 19 January 2021 - 07:51 AM

Running commodore front discs will push your wheels outboard (approx 8mm each side). Obviously this will effect the scrub radius without supporting geometry changes (Unsure if noticable or not with street driving)






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