Rear bush limiting kit + wheel spacers

[glendog74]

Hi guys,

Anyone got any feedback from fitting/using a Turner Motorsport bush limiting kit or similar, as well as wheel spacers for the fronts?

Having been on track a few times now i'm starting to push the car a little more on its standard setup with Michelin PS2s. In fast corners the back end can get a little 'twitchy' at times. I don't feel the need to replace the whole suspension but wonder if the limiter kit/powerflex route is worthwhile?

Also, i plan to get spacers for the front wheels to cure the slight understeer. Any advice on how big to get and whether i need rears as well? I do plan on upgrading the brakes in future also when current set die so presumably they need to clear the caliper size?

Cheers,

Rob. :-D

[dave1]

i put a limiter kit in 2 weeks ago transformed the car well worth the money :thumbs:

[SpineOnABap]

RTAB Limiter Kit - essential

Spacers - pointless

You'll notice a difference with the RTAB kit

[Andyk]

A friend has just fitted a limiter kit and has said it transforms the car. Simpsons highly recommend the kit.

[shimmy]

i have both and noticed immediately RTAB limiter kit improvement as well as it lengthening life of RTAB, like above essential foist mod for all owners

spacers are now fixed to my track rims and cant get them off but improvement much harder to notice. I think i have learnt not to go in too quickly to corners, which i used to do alot, whihc has cured my understeer. Dotn think spacers will 'cure the understeer' but may help just a little bit

spacers are likely to wear front suspension bushes quicker but mine come off with track tyres so most miles are done 'spacerless'

[SpineOnABap]

A friend has just fitted a limiter kit and has said it transforms the car. Simpsons highly recommend the kit.

If you saw the state they come out of the factory you'd see why! The amount of play is unreal (about 10mm per side!). I put 7mm limiters in mine.

[glendog74]

Thanks for the advice guys. :smt023

I have just booked the car into Simpsons next week for a bush check and to get the limiter kit fitted and geometry setup - just in time to try the car at the Ring again that weekend!

Will talk to Julian whilst there about any additional mods as he always has informed advice and i can try their AP brake fitted demo car. :thumbs:

[Andyk]

I'm going to book mine into Simpsons for the limiter kit to. When I spoke to them found them really helpful and knowledgeable

[cslbecks]

I am also really keen to get the limiter kit fitted as my first main mod. Simpsons is a long way from me but it seems theyve done a lot of CSL's so maybe its worth making the journey to them rather than use someone closer??
I was also keen to put spacers on both front and rear - but this was more for aesthetic reasons, to better fill arches out etc. Does anyone know whats the max size spacer you can go front and rear (my car is stock suspension)??
Also - i was thinking of buying a pair of rear csl alloys and putting them on the front. I know you need to put more neg camber on to do this - but has anyone done it/recommend it???

[Andyk]

Yep you do need to run a lot of negative camber on the front if fitting the rear wheels to the front, which is welcome on the circuit but will increase tyre wear and the tendency for the car to tramline in day-to-day driving.

[cslbecks]

Yes, ive heard it can wear the front tyres heavily - but it does look bloody awsome imo!!
In terms of the limiter kit - im slightly confused - what is the point and/or benefit of fitting the limiter "kit" as opposed to just having say powerflex bushes fitted?? Dont they do the same thing or do you get something extra with the kit??

[Mark CSL]

I run polly bushes and they cost under £40 thats a bargin
and make the car feel alot more planted :thumbs:

[cslbecks]

Ok - but then what is the point of fitting the limiter kit when it costs a lot more? There must be a benefit in fitting the kit as opposed to just fitting the bushes surely?? Otherwise everyone would just fit the bushes. Help??

[Mark CSL]

The limiter Kit looks to me like 2 washers to limit the play in the standard bush. witch are crap thats why i fitted polly bushes.

I am sure some 1 will have a differant opinion :blalalala:

[glendog74]

The limiter Kit looks to me like 2 washers to limit the play in the standard bush. witch are crap thats why i fitted polly bushes.

I am sure some 1 will have a differant opinion :blalalala:

Yep! :gayfight:

According to Simpson Motorsport, they seem to think the CSL bushes are actually ok as they are an uprated version of the standard M3's which weren't good...

The limiter is indeed 2 big aluminium washers that is designed to reduce the free space either side of the bush housing after BMW fitted a housing bracket with a little too much scope for lateral movement! In either case, the end result of a limiter kit and/or poly bushes is broadly similar...

Simpson don't really recommend poly bushes for cars used mainly on road as they can wear prematurely (compared to rubber items) and also transmit vibration more readily to other suspension components as well as making the ride harsher. The limiter kit is more expensive but in the long run, maybe needing to swap out poly bushes and worn kit would be more so? :smt012

If i had enough spare cash to just use my car on track as well as owning another daily driver that made me smile like the CSL, then i might consider poly bushes, but i have the issue of covering relatively high mileage in my CSL with the occaisional track day and i would rather not put any undue stress on suspension components.

As it is, the limiter kit has certainly worked to make my car feel noticibly more stable in high speed corners during my latest visit to the Ring. I recommend it... :smt023

[Andyk]

Agree Glendog, was told the same today.Poly's don't last as long. Was aLso told that with the Limiter kit there is no movement at all in the back......so my question is how does it affect the ride in the back. If you are using the car on the track often then this makes sense but surely for road use then the standard set up is OK?

[SpineOnABap]

Nice one!

I personally think the LK is one of the best (price vs effectiveness) mods you can do to a standard CSL. You can feel it immediately and is cheap as chips.
Unlike all these remaps and exhaust type things.

[Mark CSL]

If the limiter kit stops it moving why has bmw not done it ??

It needs to move thats what the polly bushes do but are not prone to falling
to bits

[Andyk]

If the limiter kit stops it moving why has bmw not done it ??

It needs to move thats what the polly bushes do but are not prone to falling
to bits

Thats what I was thinking to be honest Mark. The rear of my car seems well planted without to be honest. As I mentioned if you area track junky then it may make sense but for everyday is it needed.

[glendog74]

If the limiter kit stops it moving why has bmw not done it ??

It needs to move thats what the polly bushes do but are not prone to falling
to bits

I suppose it all boils down to being a handling compromise between a stripped out road racer and a 'luxury cruiser' - of sorts! I tend to prefer the car on the racier side.

Oh and cost, and the fact that BMW wouldn't want to admit being wrong! :whistle:

[glendog74]

If the limiter kit stops it moving why has bmw not done it ??

It needs to move thats what the polly bushes do but are not prone to falling
to bits

Thats what I was thinking to be honest Mark. The rear of my car seems well planted without to be honest. As I mentioned if you area track junky then it may make sense but for everyday is it needed.

Andyk - you need to start driving your CSL more like you stole it! :hahaha:

[Andyk]

Was talking to a BMW employee this week who commented on the brakes on the M3 CSL and the flack they get. He said that BMW wanted the road/track compromise as it though by veing and out and out track car it would struggle to find customers....It needed manners on the road and by adding track pads etc they felt it would let down some of it's day to day manners........so yes it was all about compromise.

[Mark CSL]

Andyk
The standard 1s dont last and you will know when you give it the beans
it will feel as if you are driving on ice when they are fooked :hahaha:

[Andyk]

If the limiter kit stops it moving why has bmw not done it ??

It needs to move thats what the polly bushes do but are not prone to falling
to bits

Thats what I was thinking to be honest Mark. The rear of my car seems well planted without to be honest. As I mentioned if you area track junky then it may make sense but for everyday is it needed.

Andyk - you need to start driving your CSL more like you stole it! :hahaha:

:-D :-D :hahaha:

I did :whistle: