What did you buy your Z4 this week?

[dfg4240!!]

Just wanted to let you know I took it to a mechanic in East Rochester ny who said if he couldn't spin balance it he would do it for for free.
He did all of them and could not get it out.
That's why I leaned towards from end alignment.
David
thanks for your reply though and good luck with your car.

[blufc3s]

DISA valve and Carfax report

[TRiCC]

BMW Motorsports 3.91 gears

[blufc3s]

They aren’t broken but my 03 Z4 “bottoms out “ occasionally , bought these
LESJÖFORS 5208452 Coil Spring

[grannyknot]

Originally Posted by TRiCC

BMW Motorsports 3.91 gears

Nice! I just installed the 3.91 ring and pinion last month so can't wait for the snow to melt.

[maupineda]

I wanted to post photos but the list is long.

To be installed tomorrow / Friday

Dinan coil packs
CPV Viton o-ring
Oil change + ceratec
Warning triangle
Repair vapor barrier seal on passenger door
3in exhaust tips
Karbonious OEM style intake

[Vanne]

Originally Posted by grannyknot

Nice! I just installed the 3.91 ring and pinion last month so can't wait for the snow to melt.

How did you get on with this? Happy?

V.

[Vanne]

Bought myself a new *LOGGER* racepak street dash. Since I got my non logger version to work, as a success present,thought I'd buy this.
(I'll post up a write up sometime in the future, it's not easy with zero info out there.)


(I haven't contributed to this thread in a while)

[grannyknot]

Originally Posted by Vanne

How did you get on with this? Happy?

V.

The car is driveable now but waiting for a day that is dry and mild enough to take it out.
That might be while, if only I was in Dubai.

[mothy5000]

Originally Posted by MVRS

Retrofitted the Aux/USB from a F10 I found on eBay, I wanted a extra charge port that looked OEM. Only hard part was finding the 4pin to USB cable… other than that it was a success!

I'm assuming this is connected to the radio. What sort of power are you getting from the USB?

[Kuky]

Originally Posted by grannyknot

Nice! I just installed the 3.91 ring and pinion last month so can't wait for the snow to melt.

I see you are from Toronto as well. Did you source the parts from Canada? what made you decide to go with 3.91 instead of 4.1?

[grannyknot]

Originally Posted by Kuky

I see you are from Toronto as well. Did you source the parts from Canada? what made you decide to go with 3.91 instead of 4.1?

I bought everything from Racingdiffs.com, they are in Latvia or Lithuania? Alekzander is a knowledgeable guy and threw in a couple of things because I ordered the whole kit from him.
The price was fantastic compared to Diffsonline and it took a week to reach me, the shipping costs were reasonable too.
I had a 3.91 in the last car I built and I missed that extra kick it had over 3.64.
I've driven cars with a 4.10 and they are great off the line, lots of fun to drive but I do a lot of highway driving so would have to deal with more sound from the higher rpms and more costly fill ups.
I figured the middle road was a good bet although you will hear lots guys here swear by the 4.10

We might have met at one of the two Z4 meet ups this summer.

[Piper1]

Originally Posted by grannyknot

I bought everything from Racingdiffs.com, they are in Latvia or Lithuania? Alekzander is a knowledgeable guy and threw in a couple of things because I ordered the whole kit from him.
The price was fantastic compared to Diffsonline and it took a week to reach me, the shipping costs were reasonable too.
I had a 3.91 in the last car I built and I missed that extra kick it had over 3.64.
I've driven cars with a 4.10 and they are great off the line, lots of fun to drive but I do a lot of highway driving so would have to deal with more sound from the higher rpms and more costly fill ups.
I figured the middle road was a good bet although you will hear lots guys here swear by the 4.10

We might have met at one of the two Z4 meet ups this summer.

If I plugged the info in right with the ratio comparison on bokchoys 3.91 vs 4.10 is about 8-10mph on the top and about 150rpm difference cruising at 70mph. Sucks diffsonline like any retailer prices have gone up. Same diff built now that I had them build for me in 2016 is over 1k more now. Will be sourcing one in the not so distant future for the coupe too.

[grannyknot]

Originally Posted by Piper1

If I plugged the info in right with the ratio comparison on bokchoys 3.91 vs 4.10 is about 8-10mph on the top and about 150rpm difference cruising at 70mph. Sucks diffsonline like any retailer prices have gone up. Same diff built now that I had them build for me in 2016 is over 1k more now. Will be sourcing one in the not so distant future for the coupe too.

Only a 150 rpms? I thought it would be much more.
This is more than I paid last summer but it is still very good.
https://racingdiffs.com/products/bmw...42833941889260

[Piper1]

Originally Posted by grannyknot

Only a 150 rpms? I thought it would be much more.
This is more than I paid last summer but it is still very good.
https://racingdiffs.com/products/bmw...42833941889260

This was what I used https://web.archive.org/web/20200729...calculator.htm
When going to the table on that link on the left to pull the gear info needed for the z4m and plugging into the calculator above has 6th at 70mph at 3,125rpm 3.91, 3,276rpm with 4.10 with 255/35/18 tires at a 3.62 has 70mph at 2,893rpm.

When I was calculating for my 03 went from 3.64 to 4.10 there’s about 400rpm difference in 5th.

[grannyknot]

Originally Posted by Piper1

This was what I used https://web.archive.org/web/20200729...calculator.htm
When going to the table on that link on the left to pull the gear info needed for the z4m and plugging into the calculator above has 6th at 70mph at 3,125rpm 3.91, 3,276rpm with 4.10 with 255/35/18 tires at a 3.62 has 70mph at 2,893rpm.

When I was calculating for my 03 went from 3.64 to 4.10 there’s about 400rpm difference in 5th.

Thanks, good site. Correcting for my wheel and tire size I come out at 2933 rpm in 6th gear. Damn! I should have gone for the 4.10 it is only 3076 rpm.

[Vincethome]

Lower radiator hose and cooling fan sensor

[Frank851]

I'd vote for the black knee pads...

[Frank851]

Originally Posted by deemo319

So, the Skyer Time Attack Spoiler arrived today. When I purchased one from the initial ten last month the lead time said 8-10 weeks. It was just barely under a month.

That is impressive considering all of the manufacturing and shipping problems. I don't know when I will get it installed but hopefully soon. And the carbon fiber looks good.

Did you ever get this on your car? More photos on the car please.

[MVRS]

Originally Posted by mothy5000

I'm assuming this is connected to the radio. What sort of power are you getting from the USB?

That I never tested but it's enough to charge small devices I am guessing. I just hooked up a 12v to 5v step down converter to a fuse tap for the USB cable. The Aux pin was plug n play.

[thrak410]

No pics - but I replaced the battery

[OneFastMac]

I bought a new center dash air vent assembly! Previous owner destroyed the clips when doing a head unit install. I had to basically hulk-rip it out of the dash.
Managed to get a black one instead of the graphite colored stock piece so it will actually match the radio surround now!