224's fitted...

[MACK]

Mike,
I think the offset is F42 and R30 with 224's dont forget the rear is 9 inch as apposed to 8.5 with the 107's. Then agin your hardly likely to forget after all that cleaning!
107's are F47 and R50
So if memory serves 224's will be poking out an extra 5mm over the 107's.

Hmm, so "may" get away with 10mm spacers and 225/40 rubber

Mike

Probably, most do on here it seems. You could also get a heat gun on the liner and try moulding it a little. Might work I'm not too sure.

 

[Ducklakeview]

It's rubbing right on the edge as per the pic.



So I don't think I could fettle it. Got some nearly new PZeros in 225/40/18 in the garage, might swap the fronts tomorrow and see if it cures it, if so I'll order some for the rears. Are the 225/45/18 and 255/40/18 standard ///M sizes? If so I'll hang them up for sale.

Mike

 

[Steve84N]

Unless you did that before it must be rubbing a lot to kill the liner so fast.

As for handling square or slightly wider front is better than wider rear unless you have oversteer problems, which the Z4 does not.

 

[Ducklakeview]

Unless you did that before it must be rubbing a lot to kill the liner so fast.

As for handling square or slightly wider front is better than wider rear unless you have oversteer problems, which the Z4 does not.

That was the result of a 16 mile "spirited " drive to work. Was perfect before.

Mike

 

[Steve84N]

Ouch. I would have guessed as much though as I still get slight rubbing with 108s on 10mm spacers coupled with B12 suspension and H&R ARBs set to the softer of the two settings. When the bar was on the stiffer setting it didn't rub but it understeered too much. My camber is maxed at around 1.4.

 

[MACK]

It's rubbing right on the edge as per the pic.

20170731_212235.jpg

So I don't think I could fettle it. Got some nearly new PZeros in 225/40/18 in the garage, might swap the fronts tomorrow and see if it cures it, if so I'll order some for the rears. Are the 225/45/18 and 255/40/18 standard ///M sizes? If so I'll hang them up for sale.

Mike

Yours is right on the edge because your wheel offset/spacer combo pushes it out an extra 5mm over my 107/15mm spacer setup. With mine I think I have half a chance with the heat gun as it's a tad further in but I'm expecting to have to go to a 10mm spacer to be honest, especially when I fit the suspension kit (10mm drop) I've bought for it a while back. One trick you can try that dramatically reduced the amount of rub I get is to put the wheel arch liner on the inside of the bumper.

 

[Panta Rhei]

Just to clarify, 3.0si 18" tyres 225/40 and 255/35 on 224s wheels instead of M 225/45 and 255/40 are just fine, even tho rears ET is 30, no rubbing?
3.0si car withour M suspension.

 

[mr wilks]

Just to clarify, 3.0si 18" tyres 225/40 and 255/35 on 224s wheels instead of M 225/45 and 255/40 are just fine, even tho rears ET is 30, no rubbing?
3.0si car withour M suspension.

You should be fine with either tyre set up if you fit the the 224s without any spacers

 

[Panta Rhei]

Just to clarify, 3.0si 18" tyres 225/40 and 255/35 on 224s wheels instead of M 225/45 and 255/40 are just fine, even tho rears ET is 30, no rubbing?
3.0si car withour M suspension.

You should be fine with either tyre set up if you fit the the 224s without any spacers

Thank you

From 17" OEM to 18" 3.0si tyres:
225/45 17" 8J -> 225/40 18" 8J -0,46% speedo error
225/45 17" 8J -> 255/35 18" 8.5J -0,22% speedo error

From 17" OEM to 18" M tyres:
225/45 17" 8J -> 225/45 18" 8J -3,85% speedo error
225/45 17" 8J -> 255/40 18" 9J -4,07% speedo error

I think it will be wise not to change diameter of a wheel and stick with 3.0si tyres

 

[MACK]

Just to clarify, 3.0si 18" tyres 225/40 and 255/35 on 224s wheels instead of M 225/45 and 255/40 are just fine, even tho rears ET is 30, no rubbing?
3.0si car withour M suspension.

You should be fine with either tyre set up if you fit the the 224s without any spacers

Thank you

From 17" OEM to 18" 3.0si tyres:
225/45 17" 8J -> 225/40 18" 8J -0,46% speedo error
225/45 17" 8J -> 255/35 18" 8.5J -0,22% speedo error

From 17" OEM to 18" M tyres:
225/45 17" 8J -> 225/45 18" 8J -3,85% speedo error
225/45 17" 8J -> 255/40 18" 9J -4,07% speedo error

I think it will be wise not to change diameter of a wheel and stick with 3.0si tyres

In theory the above is correct but in practise the speedo is set to over read from the factory by circa 3% so a switch to M tyre sizes actually gives you a more accurate speedo.

 

[Ducklakeview]

My speedo was within 1mph @70 - changing to 40/45's actually made it under read by just over 3mph at an indicated 80 - I was actually doing 83..

Mike

 

[MACK]

My speedo was within 1mph @70 - changing to 40/45's actually made it under read by just over 3mph at an indicated 80 - I was actually doing 83..

Mike

I believe you can change it in the coding somewhere. Maybe yours has been changed. In fact you can see it in decent diagnostic equipment in bmws (and others) with a digital speedo. The car knows it's doing x but the speedo is set to over read by y. Apparently it's to prevent any litigation issues from speeders etc.but the cars recorded mileage etc is still accurate. If memory serves certain bmws show this sort of thing in the hidden menus etc you can access without diagnostic gear.

 

[Worcester_spoon]

Look great! I would space them though Mike.

Did your facelift Xenons fit straight on without an updated LCM?

Hang on, have I missed something? Aftermarket Xenons that fit a pre facelift? I didn't think these were possible with MAJOR fucking about? Has someone found an easy way to do this - if they have, please share!

 

[Steve84N]

I have found a 245/40/18 to give very close to accurate speedometer readings along with the benefits of more sidewall for comfort and less stagger compared to the front for less understeer.

 

[MACK]

Look great! I would space them though Mike.

Did your facelift Xenons fit straight on without an updated LCM?

Hang on, have I missed something? Aftermarket Xenons that fit a pre facelift? I didn't think these were possible with MAJOR f***ing about? Has someone found an easy way to do this - if they have, please share!

Did you mean post facelift xenons rather than aftermarket? If so there a few on here now, Ive got them on mine and I went xenon to xenon. Ducklake has them on his and he went halogen to xenon. He's got another thread running on how he did it. There's a few different ways to do it and without seeing a wiring diagram of a pre facelift halogen I can't tell you if the configuration differs from the pre facelift xenon or not to start with.

Basically you can get them working (both halogen to xenon and xenon to xenon) with a few wiring changes however "flash to pass" wont work with the lights off. Or as ducklake seems to have done you can recode the exiting halogen LCM unit using SSSprogman to get these to work as well. I'm not sure once he did this if he kept the wiring changes he made or had to reverse them.

Xenon wise I'm only aware of folks getting the "flash to pass" to work with the lights off two ways.
1) by replacing the LCM with a post facelift jobbie and coding that. However the fact Ducklake seems to have managed it with a pre halogen unit does make you think it might be possible with a pre xenon unit as well.
2) Alternatively and if you have sat nav and can find one these days, you can install an intravee unit as mac did and this has a facility to enable the "flash to pass" to work.

With regards to "flash to pass" its not actually a legal/MOT requirement so you dont need it as such and therefore you can legally install the post xenons with just wiring changes. Just to be totally clear on this, the only thing you need to be road legal/pass the MOT are side/dip/main.
If you dont like the idea of that another work around you can employ rather than code/change LCM is to setup daylight running lights in the likes of the Caryl app or ISTA P etc. In this mode your dipped beam is on all the time and as your lights are on the "flash to pass" works.

 

[Ducklakeview]

Look great! I would space them though Mike.

Did your facelift Xenons fit straight on without an updated LCM?

Hang on, have I missed something? Aftermarket Xenons that fit a pre facelift? I didn't think these were possible with MAJOR f***ing about? Has someone found an easy way to do this - if they have, please share!

Did you mean post facelift xenons rather than aftermarket? If so there a few on here now, Ive got them on mine and I went xenon to xenon. Ducklake has them on his and he went halogen to xenon. He's got another thread running on how he did it. There's a few different ways to do it and without seeing a wiring diagram of a pre facelift halogen I can't tell you if the configuration differs from the pre facelift xenon or not to start with.

Basically you can get them working (both halogen to xenon and xenon to xenon) with a few wiring changes however "flash to pass" wont work with the lights off. Or as ducklake seems to have done you can recode the exiting halogen LCM unit using SSSprogman to get these to work as well. I'm not sure once he did this if he kept the wiring changes he made or had to reverse them.

Xenon wise I'm only aware of folks getting the "flash to pass" to work with the lights off two ways.
1) by replacing the LCM with a post facelift jobbie and coding that. However the fact Ducklake seems to have managed it with a pre halogen unit does make you think it might be possible with a pre xenon unit as well.
2) Alternatively and if you have sat nav and can find one these days, you can install an intravee unit as mac did and this has a facility to enable the "flash to pass" to work.

With regards to "flash to pass" its not actually a legal/MOT requirement so you dont need it as such and therefore you can legally install the post xenons with just wiring changes. Just to be totally clear on this, the only thing you need to be road legal/pass the MOT are side/dip/main.
If you dont like the idea of that another work around you can employ rather than code/change LCM is to setup daylight running lights in the likes of the Caryl app or ISTA P etc. In this mode your dipped beam is on all the time and as your lights are on the "flash to pass" works.

Yes, I have facelift xenons on my pre facelift HALOGEN car

Took me a while, but I basically probed and tested the original halogen to get the pin outs, then the same with the xenon. There are only two wires to swap over on each side, I used the correct extractor and removed the pins from the car's multiplug and swapped them. I did make notes/diagrams, which I'll upload to the thread when I get a min. With just the wiring changes, the xenons worked, as did the halo and the main beam etc, BUT the xenons would start flickering when the engine was started, regardless of whether the bulb failure was coded on or off, and at that time, the thumbwheel still moved them up/down.

After reprogramming the LCM with SSProgman - Choose E85 - Retrofits - Xenons, takes 15 mins, the flickering stopped, FTP worked and the thumbwheel now does nothing..

Mike

 

[MACK]

Hang on, have I missed something? Aftermarket Xenons that fit a pre facelift? I didn't think these were possible with MAJOR f***ing about? Has someone found an easy way to do this - if they have, please share!

Did you mean post facelift xenons rather than aftermarket? If so there a few on here now, Ive got them on mine and I went xenon to xenon. Ducklake has them on his and he went halogen to xenon. He's got another thread running on how he did it. There's a few different ways to do it and without seeing a wiring diagram of a pre facelift halogen I can't tell you if the configuration differs from the pre facelift xenon or not to start with.

Basically you can get them working (both halogen to xenon and xenon to xenon) with a few wiring changes however "flash to pass" wont work with the lights off. Or as ducklake seems to have done you can recode the exiting halogen LCM unit using SSSprogman to get these to work as well. I'm not sure once he did this if he kept the wiring changes he made or had to reverse them.

Xenon wise I'm only aware of folks getting the "flash to pass" to work with the lights off two ways.
1) by replacing the LCM with a post facelift jobbie and coding that. However the fact Ducklake seems to have managed it with a pre halogen unit does make you think it might be possible with a pre xenon unit as well.
2) Alternatively and if you have sat nav and can find one these days, you can install an intravee unit as mac did and this has a facility to enable the "flash to pass" to work.

With regards to "flash to pass" its not actually a legal/MOT requirement so you dont need it as such and therefore you can legally install the post xenons with just wiring changes. Just to be totally clear on this, the only thing you need to be road legal/pass the MOT are side/dip/main.
If you dont like the idea of that another work around you can employ rather than code/change LCM is to setup daylight running lights in the likes of the Caryl app or ISTA P etc. In this mode your dipped beam is on all the time and as your lights are on the "flash to pass" works.

Yes, I have facelift xenons on my pre facelift HALOGEN car

Took me a while, but I basically probed and tested the original halogen to get the pin outs, then the same with the xenon. There are only two wires to swap over on each side, I used the correct extractor and removed the pins from the car's multiplug and swapped them. I did make notes/diagrams, which I'll upload to the thread when I get a min. With just the wiring changes, the xenons worked, as did the halo and the main beam etc, BUT the xenons would start flickering when the engine was started, regardless of whether the bulb failure was coded on or off, and at that time, the thumbwheel still moved them up/down.

After reprogramming the LCM with SSProgman - Choose E85 - Retrofits - Xenons, takes 15 mins, the flickering stopped, FTP worked and the thumbwheel now does nothing..

Mike

Ok, so based on the above from DLV. halogen to xenon, you will have issues in excess of "flash to pass" with just wiring changes and no coding.
Xenon to xenon with just wiring changes, "flash to pass" with the lights off is the only issue

 

[MACK]

After reprogramming the LCM with SSProgman - Choose E85 - Retrofits - Xenons, takes 15 mins, the flickering stopped, FTP worked and the thumbwheel now does nothing..

Mike
[/quote]

Just thinking about the above Mike.
It sounds like you coded your car from a pre facelift halogen spec to pre xenon spec, not post.
If this is the case surely you would also have issues with "flash to pass" with the lights off just like everyone else who has gone pre xenon to post xenon.
Strange you haven't, unless the wiring for pre halogens/xenons differs in some way that's compensating for this or there's something different in the halogen LCM setup.
I just cant see how/where that would be though.