'00 M Roadster log

[nevan]

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SS clutch lines... Finally replacing brittle oem lines while doing the clutch line flush...



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Not shown here, but I ended up replacing the clutch slave altogether as its nozzle was slowly leaking and letting air in...
And oh boy, did I think I was having a heartache when the above happened... . Apparently many inexperienced or even experienced but careless folks (i.e., for me, inexperienced and careless particularly) supposedly go through it.

[nevan]

Pressure bled them yesterday after the replacing the brake lines and clutch slave.

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[lotte]

Those chrome mirror surrounds, where can i get one. Looks great. I shud fly u over here so u cud give advise on what to do on my z3. .

나의 SM-G950N 의 Tapatalk에서 보냄

[nevan]

Randy's subframe reinforcement kit. - Marked it off my to do list!

I haven't post much update lately as I had some curve balls thrown at my life both family and work. But I'm happy to say that it is past now with better outlook and some spare time to get back into my z3!

And here is the most recent one... Pardon my craftsmanship though.



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[nevan]

Resonators deleted...

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UPDATE

Resonators are now put back on with dual vacuum butterfly valves. See them here >

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IMG_20180629_140516_edit.jpg + IMG_20170412_190218_211.jpg

As background, I've always liked the stock muffler sounds (even the 2000+/- rpm drone). But I felt it was lacking with 2.5" tips and the a little bit in exhaust sound in higher rpm. And I wasn't able to settle for a particular exhaust system.

With the 3" tips (by Eurosport Design) previously done, I finally got to try deleting the resonators, and it seemed to work for my need. I understand some s54 folks prefer adding resonators because of the rasp sound. But as for me, it was the cup of tea which I've been seeking. It makes about the same sounds as stock until it reaches 3000 rpm, then it adds the a bit of rasp sounds.

I added some video clips in case anyone might find it helpful because I'd also had hard time finding good sources when I was researching. But also note that it sounds much louder than it really is in the videos (i.e., It really has almost about the same sounds except it has that rasp above 3000rpm).


Clip from Side:

[Rev 1] Gradual 0~6500 rpm
[Rev 2] 0~3000 + 3000~4500
[Rev 3] 0~3000 + 3000~4500 + 4500~6500
[Rev 4] 0~3000 + 3000~4500 + 4500~6500 + 4500~6500
[Rev 5] 0~3000
[Rev n] …


Clip from Rear:

[Rev 1] Gradual 0~6500 rpm
[Rev 2] 0~3000
[Rev 3] 0~3000 + 3000~4500
[Rev 4] 0~3000 + 3000~4500 + 4500~6500
[Rev n] …


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[nevan]

My cluster gauges have been increasingly developing dark spots (not shown here though).

So I recently removed and fixed them with sanding the clear backplate method (i.e., making the surface frosty).

During:
IMG_20180428_155156.jpg IMG_20180428_155149.jpg

After:
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Referenced

[z3m.casey]

What did you do?

And here is the most recent one... Pardon my craftsmanship though.

Attachment 632272

[nevan]

What did you do?

Sorry about the confusion. That was the only photo i had at time of posting. I replaced the photo so I hope the new one looks less scrambling.

[Z3 M Roadster]

And here is the most recent one... Pardon my craftsmanship though.

nevan, don't be so hard on yourself it's a pretty darn good job!

[nevan]

nevan, don't be so hard on yourself it's a pretty darn good job!

Thanks for the kind words!

I feel lucky to be here with many experts (i.e., too many to name individually), which keeps me humble too!

[nevan]

Chrome Roll Bar

A couple of months ago, I stumbled upon a listing for a set of chrome roll bars from a Z3 forum in South Korea.

Upon talking with the seller, both seller and I gained the confidence so we decided to make a deal. Payment and shipping was a bit of challenge, but it went through.

7 weeks and across the Pacific, they finally arrived. And I couldn't be happier. ;-)

Photo from the listing:


Photos after the install:

[crashgordan]

WOW. you are incredibly dedicated and very meticulous. strong work!

[nevan]

WOW. you are incredibly dedicated and very meticulous. strong work!

Thank you!!

[nevan]

2sayter.jpg
Sub-frame bushings (ended up going with 80a bushings) + diff bolts

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Toe/camber adjustable eccentric busings

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Half shaft service kit

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Rear wheel bearings

[nevan]

An unexpected toll..

Replaced it sometime last year.

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...because this happened...

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[nevan]

Switching to a 2.62 pulley

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3.60 (7psi) --> 3.33 (10psi) --> 2.62 (15psi)

IMG_20190109_122953.jpg IMG_20190109_122909.jpg


Then I quickly learn that the VFE's DV was letting go at about 9-10 psi. With an adjustable BOV (set at about 15 psi), it stopped releasing the boost.

The_Splitter_a_Recirculation_and_Blow_Off_Valve_95804.jpeg IMG_20190120_154311.jpg


However, IAT issue became more prominent (due to considerably higher iat...).

IMG_20190129_130106.jpg

[nevan]

Intake Manifold Water Injection
This is the route which I've decided to experiment...

IAT at fuel cut-off:
- Currently at about 175F in 65F weather.
- Targeting for 50~70F lowered temperature.

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Injection pump bracket - mockup
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Finished bracket
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[nevan]

Injection pump installed in SAP location

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Next step: Tubing, test-wiring, and mounting the controller, probably inside of DME box (later, it was relocated to the cabin behind of where a head unit would go), etc...

[Z-Thrizzle]

Looking forward to see how much the temps drop with the water injection.

[328 Power 04]

The car is adapting down a lot of ignition advance, very likely due to the extra boost and intake temps. May have to send you a bit lower ignition advance.

[nevan]

Looking forward to see how much the temps drop with the water injection.

You and me both, Phil!!

The car is adapting down a lot of ignition advance, very likely due to the extra boost and intake temps. May have to send you a bit lower ignition advance.

Thanks Abel!

[nevan]

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Tapped to the windshield fluid tank. Thanks for the inspiration and the trade, Phil!

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Connecting the tube

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Loose wires (relocated to the cabin later on) need to be organized and tucked away after test drive...

[nevan]

[Experimental trials and errors]

Cliff notes from learned lesson:
100% is very effective in reducing iat. But it also dilutes fuel, which causes more knocks... And I settled with the 50/50 mix in the end.

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[NOTE] I used the Torque with a cheap ebay dongle... So please ignore all other data except the IAT.

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Idle IAT

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Near 5-6k rpm IAT in similar outside temp (which is about 45F drop from the original 175F est.). After some adjusting MIN/MAX psi and swapping nozzles, I was able to reach 114F with distilled water, no methanol.

In short, it did help improving the heat-soak under the load. And I was impressed when it did. Originally I thought it would engage at preset psi then simply normalize and spray linearly until it reached max psi... Interestingly (although i don't fully understand how the injection algorithm works), it seems to try conserving the w/m fluid during normal operation...which makes sense, I suppose. It does operate very smoothly though.

The downside is that it works as a just-in-time system. It isn't an intercooler replacement. So it idles hot and runs hot like normal heat-soaked engine. But under certain boost, it lowers IAT (which is more than adequate for now). FWIW, I thought it was an interesting technology. I also thought this type of system would work even better if it had intercooler in conjunction... But for now, it is what it is. And I am happy with it.

[nevan]

Here is the latest progress/update

- New AFR kit to replace the old one.
- Disabled pre-c** o2s b*** 2 (wb o2s in its place)
- Disabled EWS, Sa*, EV**** test, em*****n readines
- Plan to test incremental -5% fuel map for 50/50 WM ratio. - 100% of water to reduce the IAT resulted in too much knock...
- Added a manual on-off switch to WMI





2020-04-20.jpg


I had some accuracy and latency issues with the 30psi gauge. So I replaced it with a 15psi gauge with better quality.

[nevan]

========================================
DISCLAIMER
For informational use only
========================================

A special shout-out to Abel!


Set-up
• Vortech v3 si (VFE didn't offer any iat cooler option )
- 2.62" pulley (15psi at 7k).
- Converted to a spring tensioner (credit: z-thrizzle)
• A small size motor oil cooler (200f average)
• Adjustable Bov (15psi --> fuel pump & e85 friendly 12psi)
• Home made open-to-air ccv with a manual oil return
• AEM Progressive WMI
- 50:50 ratio with 500cc/min nozzle
- 1psi/12psi (min/max)
- Manual overide switch
• LC-2 wbo2s (replacing an old AEM)


Tools used
• RomRaider
• Siemens flasher
• Testo (credit: pheno)
• INPA
• Torque


Tunes

DME-1: 91 octane w/WMI
• Base: 3.33" optimized tune (credit: 328Power04)
• Global map: - fig.1
- +3~5% high rpm/load
- -1~2% low-mid rpm/load
• WOT enrichment: +2~3% top cells - fig.2
• Ignition:
- -2~5 deg high rpm/load - fig.3
- set to about 15 deg mid-high rpm/low load, blended
• WOT response: 50% - fig.4
• 7130 limiter
• Etc... - fig.5

DME-2: E85 w/WMI - experimental
• Started from the Tune-1
• +30% to global map and other fuel-related (WIP). - fig.6
• Better ignition timing (Reverted to the base tune) - fig.7

DME-3: 91 octane w/o WMI
• Failsafe tune with a very conservative global map and ignition



- - - Updated - - -



Figures



DME-1: 91 octane w/WMI

-fig.1


-fig.2


-fig.3


-fig.4


-fig.5




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