M140i with m4 lca's on there own advise please

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M140i with m4 lca's on there own advise please

Post by Samp4856 » Sat Oct 06, 2018 6:12 pm

hi guys,

sorry if this has been asked before, i have looked on the forum and there seems to be mixed answers...

does running the m4's LCA's on their own work/benefit at all?

the reason i ask is.. on my m2 i ate the outside tire edge on track and im sure i will destroy the outside edge of the 140,

now from what i have read the m4 LCA is an easy way to get some more front end negative camber?

my question is this....

do they work on their own? and will there be any fitment/rubbing issues i hear they move the wheel further forward in the arch? i am currently running oem wheels/tyres on motech springs and 12mm front spacers...

also best place to order and rough idea on cost?

thanks again guys and apologies if this has been asked.
M140 Shadow edition manual lots of goodies! :spotman:

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Re: M140i with m4 lca's on there own advise please

Post by Samp4856 » Sat Oct 06, 2018 7:08 pm

looking at what i have seen from marco polos old thread i may need to drop to a 10mm spacer to ensure no rubbing?
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Re: M140i with m4 lca's on there own advise please

Post by marco_polo » Sat Oct 06, 2018 8:13 pm

Most of us started with just LCA's, they're the component which add all the extra track width/camber.

Depends on tyre choice whether you'll need to remove the spacers. Definitely avoid very tall tyres like 235/40/18's as they're proven to catch the bumper hard.
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Re: M140i with m4 lca's on there own advise please

Post by Blind Pugh » Sat Oct 06, 2018 8:41 pm

Samp4856 wrote:
Sat Oct 06, 2018 6:12 pm
now from what i have read the m4 LCA is an easy way to get some camber.

do they work on their own? and will there be any fitment/rubbing issues i hear they move the wheel further forward in the arch? i am currently running oem wheels/tyres on motech springs and 12mm front spacers...
Sam

Yes - F8x LCA only are a robust oem upgrade to add approx -1deg extra front camber.

Yes - F8x LCA only do shift wheel fwd in the wheel arch but I doubt you will have any contact issues if you remove front spacers - no longer needed as F8x LCA are longer so add track by pushing wheel face further outboard.

BP
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Re: M140i with m4 lca's on there own advise please

Post by Samp4856 » Sat Oct 06, 2018 9:07 pm

Soo bp...

Am i correct in saying on the standard 1er chassis my current spacers exaggerate the standard camber, but by removing them and adding the m4 lcas will add more?

Any idea how much further the m4 lcas make the tract? Wondering if a small spacer may still be required?
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Re: M140i with m4 lca's on there own advise please

Post by Samp4856 » Sat Oct 06, 2018 9:09 pm

marco_polo wrote:
Sat Oct 06, 2018 8:13 pm
Most of us started with just LCA's, they're the component which add all the extra track width/camber.

Depends on tyre choice whether you'll need to remove the spacers. Definitely avoid very tall tyres like 235/40/18's as they're proven to catch the bumper hard.
Perhapps swapping to a 10mm spacer may be best? On the owm 225/40’s?
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Re: M140i with m4 lca's on there own advise please

Post by marco_polo » Sat Oct 06, 2018 9:12 pm

Start with no spacer and check the clearance I guess, 12mm might still be ok with 225's
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Re: M140i with m4 lca's on there own advise please

Post by Samp4856 » Sat Oct 06, 2018 9:26 pm

marco_polo wrote:
Sat Oct 06, 2018 9:12 pm
Start with no spacer and check the clearance I guess, 12mm might still be ok with 225's
Perfect thank you, Any idea how much further the m4 lca’s make the wheel stick out?
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Re: M140i with m4 lca's on there own advise please

Post by Blind Pugh » Sat Oct 06, 2018 9:47 pm

Samp4856 wrote:
Sat Oct 06, 2018 9:07 pm
Soo bp...

Am i correct in saying on the standard 1er chassis my current spacers exaggerate the standard camber, but by removing them and adding the m4 lcas will add more?

Any idea how much further the m4 lcas make the tract? Wondering if a small spacer may still be required?
Sam

No - spacers don’t have effect on camber. Spacers do mess up scrub radius whereas longer LCA don’t effect scrub radius at all.

Upgrading LCAs adds about -1deg to your current front geo and adds about 10mm width each side ie an extra 20mm to front track.

I’m not a fan of spacers hence why went with wider wheels and more aggressive offsets all round on my m135i
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Re: M140i with m4 lca's on there own advise please

Post by Samp4856 » Sat Oct 06, 2018 10:20 pm

Blind Pugh wrote:
Sat Oct 06, 2018 9:47 pm
Samp4856 wrote:
Sat Oct 06, 2018 9:07 pm
Soo bp...

Am i correct in saying on the standard 1er chassis my current spacers exaggerate the standard camber, but by removing them and adding the m4 lcas will add more?

Any idea how much further the m4 lcas make the tract? Wondering if a small spacer may still be required?
Sam

No - spacers don’t have effect on camber. Spacers do mess up scrub radius whereas longer LCA don’t effect scrub radius at all.

Upgrading LCAs adds about -1deg to your current front geo and adds about 10mm width each side ie an extra 20mm to front track.

I’m not a fan of spacers hence why went with wider wheels and more aggressive offsets all round on my m135i
Perfect thank you! I didnt mean the spacers effected camber as such however i thought due to them extending the wheel outwards i assumed they would exaggerate it if you follow me?

Sounds like no spacers and m4 lca’s may be the way to go for me!
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Re: M140i with m4 lca's on there own advise please

Post by marco_polo » Sat Oct 06, 2018 10:47 pm

Spacers don't exaggerate any angles, they just add track width and upset the scrub radius as BP said earlier.
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Re: M140i with m4 lca's on there own advise please

Post by Ry_B » Sun Oct 07, 2018 8:25 am

What about m4 lca’s with 19”s ?
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Re: M140i with m4 lca's on there own advise please

Post by marco_polo » Sun Oct 07, 2018 8:39 am

Ry_B wrote:
Sun Oct 07, 2018 8:25 am
What about m4 lca’s with 19”s ?
Wheel diameter doesn't effect anything?

When people buy 19" wheels they fit tyres with smaller tyre walls so the overall tyre diameter is identical.

17" with 225/45
18" with 225/40
19" with 225/35

All the same overall size, for example.
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Re: M140i with m4 lca's on there own advise please

Post by Samp4856 » Sun Oct 07, 2018 9:07 am

marco_polo wrote:
Sat Oct 06, 2018 10:47 pm
Spacers don't exaggerate any angles, they just add track width and upset the scrub radius as BP said earlier.
Perfect thank you, ive read somewhere that they also lower the front end a little, is that right?
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Re: M140i with m4 lca's on there own advise please

Post by marco_polo » Sun Oct 07, 2018 9:34 am

M4 LCA's will lower the front end a little, as the struts 'do the splits'.

You gain both caster and camber as a side effect of fitting the longer wishbones, moving the wheels forward and outwards.
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