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E89 Z4 Atacama Yellow Build

Discussion in 'BMW Z' started by fmorelli, Mar 9, 2018.

  1. R.G.

    R.G. Lieutenant

    523
    Henderson, NV
    E92 N54, F02 N54
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  2. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    I wonder why they rotated the strut mounts... What kind of calculations go into ensuring you've drilled them in the right spots for how the suspension was designed?
     
  3. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    @doublespaces, as I understand it, Barry took measurements and whipped up a drawing in CAD, which was then used to create the new holes. We have no idea why the mount holes were done as they were, and it has no effect on how the suspension works (once the plates are bolted to the strut tower, the bolts are have no relevance). So no impact to how the suspension was designed, but certainly impact to how the camber/caster plates work - they need to bolt such that the leading bolt is centered pointing forward, as on any E90.

    We wondered why BMW did that, too. Barry keeps kidding around that the Z4 was designed by interns :tonguewink:

    Not sure if this addressed your question... if not, ask it differently - I'm with Barry working on fuel tomorrow and can ask him any questions you have.

    Filippo
     
  4. NoQuarter

    NoQuarter Corporal

    194
    Indiana
    Z4 35is, 535xi, X5 35i
    Well.. it was designed by 2 women!

    :yum:
     
  5. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    Yeah ... but that was aesthetics. The more one digs in to taking apart the Z4, the more one finds the little variations. Not to mention all the cheap plastic clips that break, integrated into parts. I keep ordering stuff that just breaks in my hands at $20/pop ... disappointing. It really reminds me of a kit car in some ways.

    Filippo
     
  6. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    Ok we've gotten most of the work done, as far as drivetrain and suspension are concerned. We'll finish putting the bottom of the car back together Wednesday, then set ride height, corner weight, and align. I plan to bring it back to my place at that point, and work on finishing the stereo and reinstalling all the interior parts.

    I'm going to hold off on posting all the stereo stuff that I've done in the past two weeks, so I can do it in a complete set of posts once the car is back home. I'll cover the rest of the what we put together in the following post. Today I'll cover the Fuel-It and Flexfuel related installation.

    Let me add a few suspension photos here, of the rear end. Specifically, Barry notched the inner rear camber arm area so the adjusters can be accessed. Here's how the rear looks once completed.

    IMG_20180416_133702.jpg IMG_20180416_133731.jpg IMG_20180416_133902.jpg IMG_20180416_133931.jpg IMG_20180416_133939.jpg

    Filippo
     
    Last edited: Apr 16, 2018 at 5:10 PM
  7. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    Today Barry Battle and I spent the day working on the fuel system, from the tank to the HPFP. I took a lot of photos, and I'm sure this will bore some folks, but given the lack of published E89 Z4 information, I'd rather post more than less.

    In summary, we removed the in-line fuel filter inside the HPFP, replaced the fuel lines from tank to HPFP, added a 6-micron Fuelab fuel filter (to make up for the removed HPFP filter), and replaced the in-tank filter, and upgraded the in-tank LPFP with a Fuel-It Walbro-based bucketed LPFP. Finally we installed a Fuel-It bluetooth-enabled ethanol content analyzer (ECA). The ECA will ultimately feed the Motiv Flex Fuel box which then pins into the DME harness. The fuel line kit is also from Fuel-It. The Z4 is unique and Fuel-It delivered a seup that worked perfectly on the car.

    So for starters, it was just easier to pull the intake on the Z4, so we could get to the fuel hardline connected to the HPFP and running along the block. We need to remove it so we can take the HPFP fine fuel filter out, and then we also start installing the upgraded ethanol fuel line at the rear of the hardline. This is much easier to do on the bench than in the car. In this set of photos one can see the hardline running along the block. Once the line is removed, we could see the in-line HPFP fuel filter with the mirror, and a pick tool simply pulls it out. My filter, at 30k miles, looked pretty clean.

    Finally one thing to note! The fuel hardline is bolted to the engine block with an ALUMINUM torx bolt. It is a use-once bolt, since it stretches upon installation. We threw it out and replaced it with a steel bolt.

    IMG_20180416_110831.jpg IMG_20180416_111306.jpg IMG_20180416_111901.jpg IMG_20180416_111905.jpg IMG_20180416_112049.jpg IMG_20180416_112607.jpg

    From here we started the installation, working our way to the back of the car. It is at the LPFP that we'll make the final cuts to the new fuel hose, fitting everything together. We installed the first segment of hose on the back of the hardline.

    IMG_20180416_113309.jpg

    Ok ... before I move down the fuel line install, let me post some photos of what's being installed. The first is the flex fuel, which will not actually be connected to the DME until the MHD module for flexfuel releases. Props to Motiv for using Deutsch Connectors on their harness. The brown connector then ultimately connects to the ECA (or in my case the ECA has the black bluetooth device which then has the female connector which connects to the flex fuel harness. In the ECA photo, you see a brown connector going to a loose harness - in our case, that will be discarded since the connection be the brown Flex Fuel connector. There is a photo of the upgraded Walbro LPFP, as well.

    The Fuel Lab filter is shown with the connectors we will be using. The angle connector is supplied by Fuel-It to attach the new line to the LPFP upgrade. The two connectors at the bottom (with the two silver bands) slide over the ECA silver lines and lock in place. Finally, the upper two connectors are Russell 624013 -6AN to 3/8 twist-lok connectors which we use to put the Fuelab filter in line.

    IMG_20180416_113355.jpg IMG_20180416_113358.jpg IMG_20180416_151537.jpg IMG_20180416_113750.jpg IMG_20180416_113848.jpg

    I'll continue the installation in the next post.

    Filippo
     
    Last edited: Apr 17, 2018 at 6:54 AM
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  8. NoQuarter

    NoQuarter Corporal

    194
    Indiana
    Z4 35is, 535xi, X5 35i
    Definitely interested to see where you choose to mount the filter
     
  9. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    In the last post we had removed the HPFP filter and installed the upgraded fuel line on the outbound side of the HPFP hardline. Barry Battle and I spent some time trying to figure out where the Continental ECA and Fuelab fuel filter would be installed. We initially were going to install them together. I was initially convinced we could find a spot under the car along the floor pan, but the fuel filter is simply too big.

    So we decided to separate the two, install the fuel filter at the back of the engine bay where the fuel line comes up from the floor pan, and install the ECA (which is fairly flat) in a floor pan recess by the transmission cross brace.

    So first the fuel filter. We decided to make two aluminum L brackets which join to make a T, and bolt the T to a small bellhousing torx bolt. There is plenty of room in this space, and the filter works well with the orientation of the fuel line on both sides. Make sure the fuel filter is installed with the outlet facing the HPFP!

    IMG_20180416_143635.jpg IMG_20180416_144617.jpg IMG_20180416_144622.jpg IMG_20180416_145236.jpg IMG_20180416_145331.jpg
    IMG_20180416_151159.jpg
    IMG_20180416_151614.jpg IMG_20180416_153415.jpg
    IMG_20180416_155756.jpg IMG_20180416_155805.jpg

    Next we installed the ECA/bluetooth device just in front of the trans mount. There is an unused threaded body insert which worked perfectly. We just had the open up the bolt hole on the ECA, which happen to come with a button head hex bolt that threaded perfectly into this unused threaded body insert. We cut the line from the fuel filter to the ECA and installed the slip-on connector so we could attached it to the ECA. Then on the fuel tank side, we installed the same connector so we can connect on the other side of the ECA. In the photos one can see that the ECA is about 45 degrees to the car, but this follows the lines at that point, and puts the bluetooth extension safely in the trans tunnel area.

    IMG_20180416_155651.jpg IMG_20180416_155938.jpg

    From here we ran the new line along the carbon canister line, using MIL-SPEC wire ties. When we reached the back of the car, we drilled a 3/16" hole across the empty connector so we could wire tie the large line to the connector. For the connector above the driveshaft, we ran a wire tie around the bottom of the connector, so we could then slide to wire ties around the first tie and secure the new line on either side of the connector.

    IMG_20180416_162639.jpg IMG_20180416_172538.jpg
    Finally I did not take any photos of the fuel pump or filter installation. We were too predisposed dealing with fuel and honestly there was no easy way to take photos of the inside of the tank. Below is a final photo of the new LPFP and filter installed, with the supplied 90-degree fitting.

    IMG_20180416_172519.jpg

    I hope some of these details help another Z4 owner. Once the flex fuel MHD module is released, we'll install the flex fuel pins into the DME harness.

    Filippo
     
    Last edited: Apr 17, 2018 at 6:54 AM
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  10. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    The car is running in the shop, which is good news. We have some things we are sorting through with the Ohlins configuration. As well the E90 strut bar does not clear the hood, so I'll be modifying that to work with the Z4. I'll cover these things comprehensively once I work through them.

    That said, a quick post on the transmission mounts. Lots of folks go to poly, which I'm not a fan. When it comes to engine and trans mounts, there are plenty of stories about NVH woes. I decided to leave the motor mounts stock, and go to Rogue Engineering transmission mounts. At the provided link, designer Ben Liaw does a good job of explaining why the mounts are made the way they are. In short, they are made of neoprene rubber. I added AKG Motorsport aluminum cups.

    Two pieces of advice from Barry Battle on the install. First I would not use the flange bolts provided - shoulders are two narrow, both against the aluminum trans mount "forks" and on the aluminum trans cross member. I would reuse the BMW p/n 22316760944 which is an M8 nut with a large integrated washer. On the bottom we used a flange bolt but added a washer to spread the load on the aluminum mount area. Here are photos ...

    Filippo

    mounts and cups.jpg unit.jpg installed.jpg washer.jpg
    Screen Shot 2018-04-19 at 9.34.00 AM.png
     
    Last edited: Apr 19, 2018 at 4:16 PM
  11. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    I like that setup you choose. I may do something like that myself. You're manual? I wonder if this setup will work for the DCT also.
     
  12. fmorelli

    fmorelli Sergeant

    390
    E89 Z4 35i, F10 535d
    Call Rogue and ask - Ben usually answers the phone. He knows things :).

    201-783-8600

    Filippo
     
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