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Back in the Zed!

Discussing the current generation Z4
ori
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Post by ori » Tue Nov 10, 2020 12:19 pm

Pretty much my feelings about diamond cut alloys.
Reality is that are a pain.
More of a pain is my mates Porsche turbo which has one central nut like race cars.
Changing a tyre requires precise work or you could damage the hub and refurb of the diamond cut alloys is not recommended due to the balance changes.

It’s going the way of style over substance, but damn do the alloys look good on the z4. ;)

john-e89
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Post by john-e89 » Tue Nov 10, 2020 9:11 pm

tomscott wrote: Tue Nov 10, 2020 11:09 am
john-e89 wrote: Mon Nov 09, 2020 7:19 pm
tomscott wrote: Mon Nov 09, 2020 4:02 pm Problem will all BMW and mini is they don't have the facilities to diamond cut so what's the point.

My dad bought an M3 with diamond cut alloys the day he picked it up was windy, and the car had one of those dealer flags that sits under the front wheel and it was so windy it snapped and caught the wheel so they just dry sanded it back and it has a lovely little flat spot.... absolute joke.

Even when they refurb normal wheels they aren't dipped and powder coated they rub them down and spray them direct on the tyre so you get loads of overspray everywhere. When I bought my Z4M coupe this is what happened and they were an absolute state.

So the M3 was at BMW Williams stockport and the Z4M was Lloyds Carlisle.
It’s insurance not a warranty so they’d just replace the wheel no...?
Not nessarilly just like any insurance premiums they wouldn't want to claim for small issues that can be sorted pretty easily it essentially just scratched the diamond cut area on the wheel.

Same at Porsche recently Paul had the same issue they curbed it while in for service and it came back a sanded flat spot rather than diamond cut with his eagle eyes he caught it and pushed for a new wheel and got one but those wheels are probably £1250 each.

Essentially diamond cutting is still niche although the wheels have been around a long time, its not something dealers do or even the mobile refurbers they use and has to go to a shop on a CNC cutting lathe. Obviously the other issue with diamond cut wheels is that they need to be protected because its just bare metal so they lacquer them but re-laquering is difficult to do correctly with multiple finishes (mine are painted black on the inside and diamond cut on the edge and main parts of the spoke) and you find that re-cut wheels wear faster as water gets under the finish. The other issue is they take material away so they can only be done so many times which is why you see so many E46 M3 wheels style 67 powder coated.

Diamond cut wheels imo are just a ball ache all round, they look nice but they wouldn't be my first choice. Unfortunately every car seems to come with them these days even really low end Kias they all seem to have them.

My mrs has made a right mess of my mini JCW wheels and got a quote for £800 locally from the wheel specialist to have them done. Ridiculous... thankfully its only £20 per wheel on the PCP scheme but really that doesn't help the next person who buys it because referbing a set of wheels is seen as "good will" but like I said the dealer can't do it and there's no chance they would send them out to be done properly so its a loose loose.

Places like Lepsons are pretty reasonable at £100 per wheel but its like a 510 mile round trip for me. Could send them but don't have another set to swap.
I’ll ask the question before signing for it then.
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Post by PaperSniper » Wed Nov 11, 2020 1:39 pm

ori wrote: Mon Nov 09, 2020 10:45 pm I’m sure this question was answered, but the engine note coming out the pipe at the back. It changes in sport mode, but does it change even more on sports plus?
Yes, at least in my car. Mine is still fairly new to me, and I am discovering things about it all the time. For instance, I always push the Sport button once on the console after starting the engine. Interesting thing happens when I park somewhere and secure the engine for just a few minutes, like to fill up, or run into the post office. When I re-start the engine, and from habit press the Sport button again, the computer puts the car into Sport-Plus mode.....and yeah, the exhaust note is much more aggressive than in Sport mode!

Apparently the car "remembers" the last setting if the car has only been turned off for a short period of time. I believe the seat heaters are included in that same memory, but it's not been cold enough yet to check that out.
2020 BMW Z4 M40i
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ori
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Post by ori » Wed Nov 11, 2020 6:35 pm

Ooo I like that.
Does the exhaust not change if you have it in individual settings? Like sport plus, but lighter steering?

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