What did you buy your Z4 this week?

[maupineda]

You know, I thought this a lot when choosing the ratio, and settle on 4.1. Now I think 3.91 might be a better compromise… and, you can still go to a 12% increase by changing tire size down to 40/35 from 45/40.

A 3.91 is 8% increase, tire size is 4%, and 4.1 is 13%.

[grannyknot]

Originally Posted by maupineda

You know, I thought this a lot when choosing the ratio, and settle on 4.1. Now I think 3.91 might be a better compromise… and, you can still go to a 12% increase by changing tire size down to 40/35 from 45/40.

A 3.91 is 8% increase, tire size is 4%, and 4.1 is 13%.

I rebuilt my diff a couple of yrs ago and swapped out the stock gearing for 3:91 gears, I do like the quicker take offs but I'm wishing now that I had gone with the 4:10 instead.

[3002 tii]

Originally Posted by maupineda

You know, I thought this a lot when choosing the ratio, and settle on 4.1. Now I think 3.91 might be a better compromise… and, you can still go to a 12% increase by changing tire size down to 40/35 from 45/40.

A 3.91 is 8% increase, tire size is 4%, and 4.1 is 13%.

4.10s is more fun and better ‘bang for buck’. The only time 3.91 is better is when you’re on the highway. Cruising at 70-75mph no longer feels like cruising. But just comes down to what you want, but the M won’t ever feel tame with 4.10s.

[dre99gsx]

Improved splitter mounting

[3002 tii]

After getting boatload of maintenance done (rod bearings, vanos, cooling), decided to get the car dyno’d. Only drivetrain mods are Euro headers, 100 cell high flow cats and off the shelf Epic tune. Put down a respectable 298whp, which means I should be able to crack 300 once I install the Eventuri intake in few weeks

[homebrw]

Congrats! 300 at the wheels on an 18 year old is legit!

[robblr]

Took a few months to arrive, but good art is worth waiting for.

Going with an Alpha-N tune from pokeybritches .

[SepangZ4MC]

I am attempting to program this homelink mirror

on my coupe but couldn't find any programming instructions on it. After researching for a bit, this doesn't seem like the stock oval mirror. Anyone know what BMW this mirror is from?

[ried]

Isn't there a part number on it?

[cbpip]

Try this

Clearing Existing Homelink Programming
Before you can program new settings, you must clear the existing programming in your Homelink system. Here’s how:

Step 1: Start by sitting in your vehicle near the garage door opener. Car on, not started. Doors closed.
Step 2: Locate the Homelink buttons on your car’s visor or rearview mirror.
Step 3: Press and hold the first and third Homelink buttons simultaneously until the indicator light begins to flash slowly.
Step 4: Continue holding the buttons until the light changes from a slow flash to a rapid flash, indicating that the programming has been cleared.
Programming Homelink for a Single Garage Door Opener
If you have a single garage door opener, follow these steps to program Homelink:

Step 1: Again, sit in your vehicle near the garage door opener.
Step 2: Press and hold the desired Homelink button you wish to program and the button on your compatible remote simultaneously.
Step 3: Wait for the indicator light to change from a slow flash to a rapid flash, indicating successful programming.
Step 4: Test the Homelink button by pressing it to ensure the garage door opens or closes as expected.

[wdb]

My experience with older Homelink mirrors (2007 in my case) is that they won't work on modern doors without an adapter. And the adapter doesn't maintain its settings through a power outage. Which makes it essentially useless. I gave up and now use a clip-on unit from the garage door maker.

[SepangZ4MC]

Originally Posted by cbpip

Try this

Clearing Existing Homelink Programming
Before you can program new settings, you must clear the existing programming in your Homelink system. Here’s how:

Step 1: Start by sitting in your vehicle near the garage door opener. Car on, not started. Doors closed.
Step 2: Locate the Homelink buttons on your car’s visor or rearview mirror.
Step 3: Press and hold the first and third Homelink buttons simultaneously until the indicator light begins to flash slowly.
Step 4: Continue holding the buttons until the light changes from a slow flash to a rapid flash, indicating that the programming has been cleared.
Programming Homelink for a Single Garage Door Opener
If you have a single garage door opener, follow these steps to program Homelink:

Step 1: Again, sit in your vehicle near the garage door opener.
Step 2: Press and hold the desired Homelink button you wish to program and the button on your compatible remote simultaneously.
Step 3: Wait for the indicator light to change from a slow flash to a rapid flash, indicating successful programming.
Step 4: Test the Homelink button by pressing it to ensure the garage door opens or closes as expected.

I've tried that but it appears that's only for older garage doors with static codes. Rolling codes have a different procedure which I have not been able to get working.

[3002 tii]

Was planning to install my Eventuri intake with RE silicone elbow but ran into fitment issues with the boot. Really didn’t want to chop off the connector off the factory piece so running the factory elbow for now.

Now I just need to decide if I bother installing the intake “scoop”, don’t really think it does much and not crazy about the red hardware showing behind the grill.

[DiscoJax]

After screwing around with a couple other tuners, I finally came to my senses and tried for a third tune - this time with Severn. Along with the tune for the Vortech, I upgraded the fuel injectors to 525 cc FICs, MS45.1 ECU conversion with wideband sensors and new ignition coils. Had the intake pressure tested and replaced the intake manifold gasket set.

Car sounds and feels so different. Has a completely different exhaust tone and rumble which is very nice. Still early on working through the tuning but I like what I see so far. Also planning on a second tune to run E85.

A couple other things were bothering me like the aftermarket lights poorly wired and all the expensive plastic underneath was destroyed so I went ahead and replaced that.

Topped it off with a shiny new wind screen from a guy who makes them in Latvia.

[onebluemcm]

Originally Posted by 3002 tii

Was planning to install my Eventuri intake with RE silicone elbow but ran into fitment issues with the boot. Really didn’t want to chop off the connector off the factory piece so running the factory elbow for now.

Now I just need to decide if I bother installing the intake “scoop”, don’t really think it does much and not crazy about the red hardware showing behind the grill.

You can make it work, don't throw the towel in. I bought an adapter instead of the big huge barb they send with the elbow. Goes from 3/8 to 1/4 I think it was. Then use some regular vacuum tubing to go the the elbow to the solenoid.

I didn't install the red scoop, kind of like tits on a bull to me anyway, and yeah, hard pass on the red showing through the grille.

[3002 tii]

Originally Posted by onebluemcm

You can make it work, don't throw the towel in. I bought an adapter instead of the big huge barb they send with the elbow. Goes from 3/8 to 1/4 I think it was. Then use some regular vacuum tubing to go the the elbow to the solenoid.

I didn't install the red scoop, kind of like tits on a bull to me anyway, and yeah, hard pass on the red showing through the grille.

Yea I thought about cutting down the barb and using a rubber hose with clamps. I’m just more annoyed this was advertised as only to be used with factory style intake only to find out it doesn’t even fit that.

Re adapter, so you just used a 3/8 to 1/4 barb reducer + 1/4” ID tubing?

[onebluemcm]

Originally Posted by 3002 tii

Yea I thought about cutting down the barb and using a rubber hose with clamps. I’m just more annoyed this was advertised as only to be used with factory style intake only to find out it doesn’t even fit that.

Re adapter, so you just used a 3/8 to 1/4 barb reducer + 1/4” ID tubing?

Yep, pretty sure. Measured the barb that came with it to get the elbow end size, and I'm pretty sure the barb on the solenoid end is 1/4. I had left overs from a coil of Vibrant vacuum hose from a difference project, different vehicle, that worked fine.

I'm assuming you got the Z4M specific RE elbow? Mine is on the factory air box with an Eventuri filter housing, so identical to what you are doing. I don't know if they did this on purpose and stupidly haven't made it clear, but I found it to be oversized. I took my time comparing it side by side on the workbench to the OE elbow, used tape on the new one to mark where I wanted to cut, and carefully trimmed it to fit. Got a pretty perfect fit at this point.

I also had some 1/4" thick by 1" aluminum bar stock laying around, made two simple, short brackets to lower the aux water pump that is below the elbow about an inch, maybe inch and a half. I've see where people have cleared it in it's stock location and others have had interference - I just lowered it a tad just in case. Don't think I have and photos of that.

I hate that the over flow hose from the radiator just sits on top. I'm trying to source that same type of semi hard/semi flex tubing they used to reroute it along the side, the hose material is hard to find. It's high temp stuff that is thin wall, so looks OE. You could easily use some regular rubber hose, but it might look like turd. Work in progress...

[3002 tii]

Correct, same exact setup. Factory airbox + RE elbow (Z4 M specific) + Eventuri sans scoop lol.

I noticed it being a rather tight fit. But again I gave RE the benefit of doubt that it was spec’d perfectly so I sorta jammed everything during the test fit. But it’s definitely not ideal, there was so much tension and very little clearance for the other ancillary hoses.

I have a bigger issue to deal with. I was tinkering with the location of the maf sensor and ended up shearing one of the screw heads. Was too much in rush and used my cordless ratchet. I swear I’ve never broken so many clips or stripped as many bolts as compared to my other cars lol.

[maupineda]

I gave up on those stupid silicone elbow, too much work for nothing IMO.

[ried]

Bilstein B16 PSS10

[onebluemcm]

My Coupe needed a friend.

[3002 tii]

Originally Posted by onebluemcm

My Coupe needed a friend.

AW with hard top, nice!!! More details!