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      03-15-2017, 10:39 AM   #1
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Z4MC S65 DCT + Suspension/Cosmetic Build

Hey guys! There are some crazy things going on over here. You'll notice I'm new to the Z4 side of things, but not BMWs in general. I picked up a Z4MC the other day (more on that later) and I'm proceeding with a build.

I might not post everything about the engine build, but it will certainly all be on [Admin Notified]. I would link but apparently the mods don't like that. Weak. Absolutely weak.

I'm starting a project build using the S65 platform. My first thought is to build a stroked motor and slap on a nice supercharger to make "big numbers". The problem is, there's a lot of information around about builds such as this and I'm left rather apprehensive. Admittedly, I'm not an expert engine builder, nor am I a physicist or mechanical engineer so bear this in mind when evaluating my statements. I am in no way attempting to be make any statements written in stone. I'd like to hear all of your feedback and thoughts on this matter to try and get a better idea of what to do.

Here's where we are at so far: I have the donor car for the build so at this time all we have to do is do the build. I'm still in the planning phase of this build and the only thing I have gotten is a block. Specifically, I just picked up a block from ebay for a very good price that was hydrolocked. Since I plan to build a stroked engine I figured this is no big deal at all and any machining/sleeves would render this a very usable block.

To elaborate on my goals a bit more, I really would like to get at least 700 wheel. My first plan is to go with the PPM stroker kit and a compression of 10:1. I've been speaking with Peter Helmuth from PPM in Australia and he has advised me that he can sell me the same stroker kit they use in their 4.8L race motor. It's an 86mm stroke and a 94mm bore. This sounds absolutely nutty awesome and it's something I'd like to do. He advised me that I don't really need sleeves even with running boosted. Now, this is where my apprehension comes into play. I'm not too sure about all of this. It seems to me that alusil is not exactly the strongest material in the world and sleeves like Darton makes are really great for running in boosted motors. My main concern with sleeves is excessive temperature retention, but again I'm no expert here.

Before I tackle the supercharger, I'd like to lay out my stroker build first.

I've attached some pictures of the block I picked up. One of the pictures details a repair that was one on one of the cylinders. Everything looks fine here to be a candidate for a stroker build like this. Thoughts on this block? I don't see anything that jumps out and throws a big red flag.














I ordered a ton of parts for this engine build and picked up several big items locally. Pictures to soon. This build is happening guys! I'll make sure to document all my steps and results for prosperity. Maybe the motor fails, maybe it does not. We'll just have to see, but I'm giving the stroker/supercharged motor a go. I'm sure I'll get a lot of flame over certain aspects of this build, but oh well. Gotta live life the way you want.

I just bought the car that will be being swapped. I'll be picking her up this weekend. Reason for getting this car: weight. It's much lighter, shorter wheel base, perfect for building something with great handling. The torsional rigidity is 32,000 N.m which is far more than most cars. The reason I'm building an S65 for this car instead of an S85 is weight and size. With the S65, it will sit further back in the bay than the S54 and weigh much less until I throw on the supercharger which will probably get it to be only a few more pounds heavier, but remember it will be further back for better weight distribution.

Believe me, I wanted to go with the S85 for the V10 sound, but too much weight.

If anyone is wondering what is going to happen to the S54 and trans, I may offer it up for sale when I get closer to pulling it. We'll have to see. I have a feeling grabbing a prepped rolling E30 and dropping in the S54 would be a fun treat. However, if anyone wants to reserve the S54, I am open to offers. It has around 90k on it and would be perfect for a track build. I won't be needing the 6 speed trans either.







More updates and pics to follow so follow this thread!
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      03-15-2017, 11:05 AM   #2
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Eager to see your results! A friend of mine has been looking to source an S65 for his Z4M endurance racing build
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      03-15-2017, 11:07 AM   #3
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Quote:
Originally Posted by 86Zed View Post
Eager to see your results! A friend of mine has been looking to source an S65 for his Z4M endurance racing build
I have two S65 engines and a spare block that would need sleeving. I can sell my S65 long block with 6 speed trans for the right price. Let him know.
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      03-15-2017, 11:49 AM   #4
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As an S65 AND Z4M owner, I'm absolutely subscribing to this. It's going to be such a fantastic project.
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      03-15-2017, 11:50 AM   #5
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Quote:
Originally Posted by W/// View Post
As an S65 AND Z4M owner, I'm absolutely subscribing to this. It's going to be such a fantastic project.
There's no financing issues with this project like other people's projects so this is going to get done quick!

Edit: I'll document every step in getting the engine and trans to bolt in so that anyone else can easily reproduce it. If I get enough good feedback, I'll build a swap kit for anyone who wants to attempt.

Last edited by MPLICIT; 03-15-2017 at 12:06 PM..
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      03-15-2017, 12:20 PM   #6
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Awesome!!!
Good luck with the build
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      03-15-2017, 01:35 PM   #7
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Subbed..
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      03-15-2017, 01:36 PM   #8
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This should be fun!
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      03-15-2017, 03:37 PM   #9
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I'll be posting some update pics in a few minutes! Making good progress over here on my parts collection for the motor! Do you guys want to get the same motor build updates as [Admin Notified] or would you rather this be all about the build of the chassis?

Last edited by MPLICIT; 03-15-2017 at 05:00 PM..
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      03-15-2017, 03:41 PM   #10
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Seeing that we can't access "[Admin Notified]", I would like to hear about the engine build.
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      03-15-2017, 04:56 PM   #11
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Quote:
Originally Posted by StickMon View Post
Seeing that we can't access "[Admin Notified]", I would like to hear about the engine build.
Moderators are a bunch of panzies that won't let me name or link out to the other forum because they are free speech censoring tally-waggers. I may be wrong, but I figure the admin lives in the US like most of us. He should understand the importance of free speech, but apparently not. So sad.

I'll go ahead and put all the content here as some of you may care, and Admins/mods, why don't you PM me and stop being fudge-sicles. I'm trying to bring quality material here and keep things relevant, but you are stiffing that.

Update time!

I picked up an intake manifold (I'll be running for a month or two on the stroker before I SC), headers, and tons of other goodies as you can see pictured. I have parts coming in for the rest of the week and even next week. The block will be heading out next week with any luck and we'll get this show on the road.

I almost have all the random tid-bits here and there to have a running engine when I throw the top end on my built bottom end. I'll eventually build the top end with cams and better springs, but not for now. Just bottom end.

A bit of a side note: I don't plan on running stock headers forever, I mainly got them because they were a good deal and should help me fit the motor in the car. I have no idea if stock headers will fit, but we'll see. I'll report all my findings in depth and with measurements so anyone else can follow in my foot steps.

I'll have the DCT trans, complete heads, and other parts next week. I'll be sure to include some pictures. Getting the DCT to work in this car is going to be a nightmare. I'm thinking I'll just throw in all the E9x electronics and gauges and get it to "fit" nicely with an OEM look.


Last edited by MPLICIT; 03-15-2017 at 05:02 PM..
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      03-16-2017, 12:17 PM   #12
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those stock headers on from ///M are SWEET.
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      03-16-2017, 05:44 PM   #13
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Quote:
Originally Posted by ApolloTheGod View Post
If I get enough good feedback, I'll build a swap kit for anyone who wants to attempt.
This I am subscribed for... hopefully for a 6 speed too
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      03-16-2017, 06:13 PM   #14
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Quote:
Originally Posted by F360C View Post
This I am subscribed for... hopefully for a 6 speed too
You'll be disappointed then because I'll be running DCT trans

Okay so you're probably wondering why DCT... Because it competes better and any prudent individual would conclude such. Yes, 6 speed is more fun, but I'm building a car for competition, not fun. Anyway, it will be fucking cool to see a running DCT in a Z4MC that is OEM feeling/looking and clean. It could be a helpful DIY for anyone attempting to swap DCT into any 6 speed car and getting it to go in cleanly.

Update time!

Here is a pic of the complete head assembly I'll be picking up. I got everything for a reasonable deal so this will really expedite the build. Brian from VAC just got back to me today with a quote on the bottom end. It's expensive but VAC is a top shelf shop with top shelf wrench masters. I'll update more about the engine build as we get closer to sending the bottom off. I'll update this thread again Monday with the project car pics and more part pictures. I plan to assembly everything on a stand to make sure I have everything I'll need. It helps to visualize it all first

As a side note, you guys can expect things to keep moving at a good pace. The funds for this project have already been allocated so there won't be any hold ups due to money. If there's a hold up it's going to be with shipping or manufacturing of something.

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      03-16-2017, 06:50 PM   #15
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Mad respect brother!
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      03-16-2017, 09:22 PM   #16
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Mad respect brother!
Come to Bimmerfest East this year and check it out! I'll be long done by then
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      03-16-2017, 10:42 PM   #17
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      03-17-2017, 05:04 AM   #18
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      03-17-2017, 05:41 AM   #19
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Hey bud, have you done any think time in regards to how your gonna do the electrics? Thats gonna be your most difficult bit. The z4m dme is not nice to work with.
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      03-17-2017, 07:00 AM   #20
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Quote:
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Hey bud, have you done any think time in regards to how your gonna do the electrics? Thats gonna be your most difficult bit. The z4m dme is not nice to work with.
Great question you have! I actually have taken the time to already plan out the electronics and I'm confident this will be the easiest swap.

Here's the plan: I've got an E92 donor car with complete body harness and all electronic modules with options I want like Comfort Access and such. My plan is to basically pull out the entire Z4 electronic suite and harness leaving behind only lights, door locks, window switches, etc. I'll then be dropping in the E92 harness and modules and splicing connectors where I need them. This will result in a "drop in" electronics swap. I need the E9X M3 gauge cluster and some of the other electronics anyway so this is the easiest way.

You may now want to know how we're getting it all to fit... Well, I'll be fusing parts of the E9X dashboard with the Z4 dashboard. For instance, the gauge cluster tower part of the dash from the E9X will be cut off and fused in with the Z dash. Along with a few other areas, I'll then finish the dash in a leather or alcantara finish. I may remold the dash for a lighter version, we'll see. I may just know it's frankenstein underneath.

If you have any more questions I'll be sure to answer them. I want to make this as easy as possible for me so I'll be carefully documenting this process for anyone who wants to attempt or do something similar.
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      03-17-2017, 09:45 AM   #21
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Quote:
Originally Posted by ApolloTheGod View Post
You'll be disappointed then because I'll be running DCT trans

]
Ha I think you misunderstood... I am hoping you make a swap kit that I can use on my 6 speed. I would just mis rowing my gears on this car too much to do DCT in this car.

That said I TOTALLY support you going DCT! Driving PDK 911s on track vs 7 speeds I was faster every lap. Add to that the fact that it lightens the mental load you can really see how it makes every driver from pro to amateur faster.

I still maintain that the Getreg dual clutch set up in the e9x is one of the best.

Awesome project and cant wait for all the updates!
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      03-17-2017, 10:05 AM   #22
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Quote:
Originally Posted by F360C View Post
Ha I think you misunderstood... I am hoping you make a swap kit that I can use on my 6 speed. I would just mis rowing my gears on this car too much to do DCT in this car.

That said I TOTALLY support you going DCT! Driving PDK 911s on track vs 7 speeds I was faster every lap. Add to that the fact that it lightens the mental load you can really see how it makes every driver from pro to amateur faster.

I still maintain that the Getreg dual clutch set up in the e9x is one of the best.

Awesome project and cant wait for all the updates!
As far as I am aware the DCT and manual transmissions attached the S65 (I don't actually know which model name) are the same dimensions where they bolt in. So a mount I make for DCT should work with manual. If you guys are serious about doing this swap too I'll buy a 6 speed transmission to make sure and take the time to R&D.

Who all would commit to something like this? If you were to go 6 speed, you would not need to do many funky electronics stuff and the swap kit would be driveshaft, tranny mounts, engine mounts, and probably a few other small brackets and screws here or there. Perhaps a modified engine harness to get everything to work with Z4 electronics. As I develop this I'll note down what is needed.

Swapping in a 6 speed S65 is actually an incredibly intelligent move for this chassis. It's lighter than the S54, performs better than the S54, and distributes weight better. It leaves more room in the engine bay for many additions.
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