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      12-03-2020, 11:08 PM   #1
lafuerza
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Z4MC on KW3 Square Setup Question

I have a 2007 Z4MC on Volk TE37SL wheels with 245/35/18 and 275/35/18 with PS4s. Currently on stock alignment. I am used to driving square setups and wanted to try to go 265/35/18 square with more street/track alignment.

Here is the million dollar question: Where can I go with KW3 suspension? Will 265/35/18 RE71 fit (my tire of choice) It has progressive springs so they eat up space. Currently no camber plates but plan on putting Vorschlag for Castor and Camber adjustment.
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      12-03-2020, 11:19 PM   #2
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Just camber plates, it won't easily fit. Do you have square wheels now?

I have 9.5 ET35 with 5mm spacer in the front with linear spring and 2.8° camber. 265/35 Azenis 615+K tires.. (wider than most and with square shoulders)

I have 5mm clearance..
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      12-07-2020, 09:39 PM   #3
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No my wheels are not squared. I can't go passed 245 on front as its already ballooning. Was planning to go camber plates, Apex 18x9.5 ET35 wheels. I playing with idea of 17s but the ST60 brakes are huge and my current 18 wheels barely fit.

Talked to APEX. They recommended the 18x9.5 ET35 with 5mm front and 12mm rear if using 265/35/18 tire otherwise if using 275 no spacer. They did not think a 285 would fit with out starting to do body work/rolling/pulling.
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      12-10-2020, 08:12 AM   #4
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Quote:
Originally Posted by lafuerza View Post
I have a 2007 Z4MC on Volk TE37SL wheels with 245/35/18 and 275/35/18 with PS4s. Currently on stock alignment. I am used to driving square setups and wanted to try to go 265/35/18 square with more street/track alignment.

Here is the million dollar question: Where can I go with KW3 suspension? Will 265/35/18 RE71 fit (my tire of choice) It has progressive springs so they eat up space. Currently no camber plates but plan on putting Vorschlag for Castor and Camber adjustment.

I do have the same situation with my 2007 Z4 Mcoupe, I have installed a KW3 with linear springs (with helper) an camber plates with ~3,2 ° camber.

The Maximum i can reach is 255/35 R18 on a 9" rim (20mm offset) , then i have ~5 mm space to the Springs ...

greetz Eric
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      12-21-2020, 10:56 PM   #5
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Went to Edge Motorsports today and saw a nice red Z4M that runs 265/35/18 on 18x9.5 ET35 square and also can run 275 at the track and also has KW3 without fender rolling/pulling but min 2.5 camber. Looks like I will be looking to get two larger VOLK TE37 wheels or selling off set and getting Apex Arc's.
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      12-22-2020, 03:50 AM   #6
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Quote:
Originally Posted by lafuerza View Post
Went to Edge Motorsports today and saw a nice red Z4M that runs 265/35/18 on 18x9.5 ET35 square and also can run 275 at the track and also has KW3 without fender rolling/pulling but min 2.5 camber. Looks like I will be looking to get two larger VOLK TE37 wheels or selling off set and getting Apex Arc's.
very interesting, here you can see my KW3 setup with linear Srpings in combination with 8,5x18 ET25 / 235mm Michelin Cup2... There is ~ 7 mm Space to the spring, on the outside there is maximum ~ 20mm space...

running 3,2 camber ...

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      12-22-2020, 04:06 AM   #7
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Quote:
Originally Posted by enzoaus View Post
very interesting, here you can see my KW3 setup with linear Srpings in combination with 8,5x18 ET25 / 235mm Michelin Cup2... There is ~ 7 mm Space to the spring, on the outside there is maximum ~ 20mm space...

running 3,2 camber ...
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      12-22-2020, 01:30 PM   #8
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I have KW ClubSports on mine with 275/35/R18s all around, but had to do quite a few "tricks" to get them to fit.

1. I had to run without the helper springs to clear enough space for the wheel to strut clearance.



2. I had to run with up to 3º negative camber up front for the outside of the tires to clear the fenders.

Image attached is an older pic but it gives you an idea how close it is while settled to the ed of the fender.

3. I had to run spacers to get to the ideal offset. Running the stock rear wheels all around at 30mm of offset works up front, but with aftermarket rims (9.5" wide) I need at least 26mm of offset to fit without rubbing the struts. 9" is a little on the narrow side to run 275mm. Heck even 9.5" is a little on the narrow side to run 275. I am almost certain 10" will be a problematic fit up front, although it's more ideal for a 275mm wide tire.
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      12-22-2020, 02:27 PM   #9
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In doing some more research I think the ideal "useful" setup is 265/35/18 square with 9.5" wheel to maximize contact patch and make for an "easier" setup without modifying the coilovers or car. Definitely will need spaces to play around with to get things to fit right and at least 2.5 degrees of camber up front but likely closer to 3.

My front wheel now is a 8x8.5 Et35 with PSS4 245/40/18 and there is an inch or roughly 25mm on the outside of the tire and good clearance on the inside as well so if I go to 9.5 wheel with 265mm width with spacer I should be okay with some finesse with 265s up front.

Tire wise I was thinking RE71R, ZIII, or RS4. PSS4 are just too soft of a sidewall for aggressive use. RS4 was recommended as a good all arounder though I had RS3s and they were really bad in the wet and okay dry though noisy.
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      12-26-2020, 02:18 AM   #10
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Quote:
Originally Posted by enzoaus View Post
very interesting, here you can see my KW3 setup with linear Srpings in combination with 8,5x18 ET25 / 235mm Michelin Cup2... There is ~ 7 mm Space to the spring, on the outside there is maximum ~ 20mm space...

running 3,2 camber ...
Hi enzoaus,

What wheels do have? I've been looking for 18 x 8.5 +25 front wheels to make sure I can clear KW V3s (when I get them), but haven't found any options. BBS RG-R at +22 is the closest I have found.
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      12-28-2020, 01:58 AM   #11
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Quote:
Originally Posted by The HACK View Post
I have KW ClubSports on mine with 275/35/R18s all around, but had to do quite a few "tricks" to get them to fit.

1. I had to run without the helper springs to clear enough space for the wheel to strut clearance.
Yes: this was my idea too, as you can see on my picture, the helper is compressed fully, si I don't think it's necessary ???


Quote:
Originally Posted by The HACK View Post

3. I had to run spacers to get to the ideal offset. Running the stock rear wheels all around at 30mm of offset works up front, but with aftermarket rims (9.5" wide) I need at least 26mm of offset to fit without rubbing the struts. 9" is a little on the narrow side to run 275mm. Heck even 9.5" is a little on the narrow side to run 275. I am almost certain 10" will be a problematic fit up front, although it's more ideal for a 275mm wide tire.

yes, agree : with the more free space when going w/o helper a 9,5 is possible (~12 mm) with a 265 in front ...
I think that 9,5 in the rear is a perfect fit with 265 and a offset of ~25mm

thx
Enzo
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      12-28-2020, 02:12 AM   #12
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Quote:
Originally Posted by MBan View Post
Hi enzoaus,

What wheels do have? I've been looking for 18 x 8.5 +25 front wheels to make sure I can clear KW V3s (when I get them), but haven't found any options. BBS RG-R at +22 is the closest I have found.
Front: 8,5x18 ET35+10 spacer: OZ ALLEGGERITA HLT with 235 ...
Rear: 9,5x18 ET35+10 spacer: OZ ALLEGGERITA HLT with 265 ...

if you want KW3: order additional Camber Plates and a linear spring in front, but then you can better go with the CS .... its about the same price ...

greetz
Enzo

in Europe a good adress for wheels:
https://www.pro-track.de/ProTrack-ON...ml?language=de
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      12-30-2020, 04:42 PM   #13
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Thanks, enzoaus.

I have Advan RS-DFs 18 x 8.5 +35 at the front. I ran these with a 10mm spacer for a while but in Australia spacers are illegal, so I am hoping to find a wheel that has the offset I am looking for 'out of the box'.

Thanks for the advice about the KW CS, which is an option. From the reviews I have read, the V3 with progressive springs sounds like it is better for street driving so I am hoping to make it work. It looks like the BBS RG-R is going to be my best option unless I can find a set of Volk ZE40s second hand (I don't really like the designs offered by Forgeline, HRE, etc, who do custom offsets).
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      12-31-2020, 05:00 AM   #14
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Quote:
Originally Posted by MBan View Post
Thanks, enzoaus.

I have Advan RS-DFs 18 x 8.5 +35 at the front. I ran these with a 10mm spacer for a while but in Australia spacers are illegal, so I am hoping to find a wheel that has the offset I am looking for 'out of the box'.

Thanks for the advice about the KW CS, which is an option. From the reviews I have read, the V3 with progressive springs sounds like it is better for street driving so I am hoping to make it work. It looks like the BBS RG-R is going to be my best option unless I can find a set of Volk ZE40s second hand (I don't really like the designs offered by Forgeline, HRE, etc, who do custom offsets).

the V3 is perfekt for street driving, it was my first thing i changed on my z4m in 2014 ... intersting that spacers are not allowed in Australia, but you can change the tire dimensions ?

Here in Austria (not Australia ) on Streets i have to use the original 225/255 on the Z4m, i did have a visit at our lokal government to allow 235/265 with spacers and KW3 ... therefore i got a special license.

on track i now want to use 255/265 ...

with KW V3 an w/o plates a 235 or245 on 8,5 (ET 25) is my suggestion for you ...

greetz form Austria to Australia

Enzo
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      12-31-2020, 06:57 PM   #15
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Quote:
Originally Posted by enzoaus View Post
the V3 is perfekt for street driving, it was my first thing i changed on my z4m in 2014 ... intersting that spacers are not allowed in Australia, but you can change the tire dimensions ?

Here in Austria (not Australia ) on Streets i have to use the original 225/255 on the Z4m, i did have a visit at our lokal government to allow 235/265 with spacers and KW3 ... therefore i got a special license.

on track i now want to use 255/265 ...

with KW V3 an w/o plates a 235 or245 on 8,5 (ET 25) is my suggestion for you ...

greetz form Austria to Australia

Enzo

Thanks, Enzo. Tyre widths are not so much an issue here but you aren't supposed to change the wheel width by more than 0.5 inches or diameter by more than 1 inch. There are also some rules around changing the track but that is less of a concern as long as long as you don't go to extremes.

So, with camber plates it is easier to make a higher offset work? I have heard Ground Control camber plates are good?The RG-R comes in 8.5 +30 and 8.5 +22. The +22 option is starting to get a bit aggressive for my liking, though.

Sorry to the OP. I hope this is still relevant to the topic.
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      01-01-2021, 12:12 PM   #16
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Quote:
Originally Posted by MBan View Post
Thanks,

So, with camber plates it is easier to make a higher offset work? I have heard Ground Control camber plates are good?The RG-R comes in 8.5 +30 and 8.5 +22. The +22 option is starting to get a bit aggressive for my liking, though.

Sorry to the OP. I hope this is still relevant to the topic.
I Think that's the topic, it's not easy to find a good combination for our Z4.

So you want to use BBS RG-R 8,5 at +22 for the front - that should work.
a simple method to geht more neg. camber in the front is to use washer plates between the strut and the damper - i did it with my KW V3 w/o the plates in 2014 ..you easily can do this yourself... search in this forum ...
yes neg. camber is better to "get" the tire in the wheel houing.


in the rear youn can use 8,5, 9, or 9,5 with ~25 offset...

tires: in the front should work 245 (255), in the rear up to 265 (275) with this setup...

cu
Eric

PW: sorry for my bad English
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      01-01-2021, 10:12 PM   #17
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Quote:
Originally Posted by enzoaus View Post
I Think that's the topic, it's not easy to find a good combination for our Z4.

So you want to use BBS RG-R 8,5 at +22 for the front - that should work.
a simple method to geht more neg. camber in the front is to use washer plates between the strut and the damper - i did it with my KW V3 w/o the plates in 2014 ..you easily can do this yourself... search in this forum ...
yes neg. camber is better to "get" the tire in the wheel houing.


in the rear youn can use 8,5, 9, or 9,5 with ~25 offset...

tires: in the front should work 245 (255), in the rear up to 265 (275) with this setup...

cu
Eric

PW: sorry for my bad English
Thanks for the advice and no need to apologise for writing in your second language!

The Advans I have at the moment are 18 x 9.5 +22 at the rear with a 265 tyre and I like that fitment. The closest that the RG-R has is 18 x 10 +25, but that should fit.

Some of the more obscure Japanese wheel brands (e.g. Neez and TWS Forged) do 8,000 - 10,000 tonne die forged wheels in custom offsets but they are expensive and not easy to buy from. I'll explore those brands as well but I suspect the BBS RG-Rs will be the best solution on balance.

Thanks again.
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