Martyn's Z4M Coupe

[Beedub]

how much weight does the DCT add? i didnt take this into consideration.

 

[Martyn]

It's about a 35kg increase over the 6MT box. Maybe I'll have to get some Tillets like yours to make up for the additional weight i've added

I got a couple more short vids yesterday, nothing too exciting i'm afraid as I'm still tweaking.

Auto mode, D2.

[youtube]cqbGQMLjo0I[/youtube]

And S6 manual mode, with a bit of throttle

[youtube]lpUS0ti-Llg[/youtube]

Overall I'm pretty pleased with how it drives, a bit more work to do to get it perfect though.

Excuse the steering wheel angle, I need to sort that ASAP!

 

[RMB]

Oh my god!

 

[Wassup]

Can't wait for a 'full send' video Martyn

 

[Beedub]

the shift lights in the rev counter is nuts! if you can code this for everyone!! im INNNN.

cnt wait for more videos!

 

[robear]

the shift lights in the rev counter is nuts! if you can code this for everyone!! im INNNN.

cnt wait for more videos!

I looked it up and the MaxxECU has a shift light option for the E46 M3 cluster. I am guessing it is a feature of the aftermarket ECU.

 

[zmaster007]

Incredible. Also this:

the shift lights in the rev counter is nuts! if you can code this for everyone!! im INNNN.

cnt wait for more videos!

 

[TomK]

And S6 manual mode, with a bit of throttle
[youtube]lpUS0ti-Llg[/youtube]

Bloody hell, it doesn't hang around does it! Amazing.
I think Martyn said it wasn't possible to get shift lights with our ecu unfortunately. Looks like the max does

 

[Martyn]

Thanks all.

Yeah, no support for shift lights on the MSS70 unfortunately.

 

[curvature]

For some reason the videos don't show up on my MacBook Pro?

Do you have link to them?

 

[Martyn]

https://www.youtube.com/watch?v=lpUS0ti-Llg

and

https://www.youtube.com/watch?v=cqbGQMLjo0I

In other news, I've raised the front ride height so no more scrubbing undertray, and also re-aligned the steering wheel as it was really annoying me.

 

[Beedub]

the omp wheel is a thing of beauty.......

 

[Martyn]

Soft start (no launch/race start), short shifting at 7.5k ish with 70% throttle.

[youtube]xN0N57K4Ti0[/youtube]

 

[1536Z4]

short shifting at 7.5k ish with 70% throttle.

Better or worse than a manual gearbox

 

[Martyn]

A million times better, it also means I can keep 2 hands on the wheels whilst trying to keep the car on the road

 

[Vanne]

Awesome progress mate!! top notch love the gearbox, thats magic pure magic

 

[tomscott]

Holy moly.

This thing will be insane!! Always wondered what a DCT S54 would be like im sure it is epic.

Great work!

 

[RMB]

What’s the gearing like Martyn? Are the ratios a bit closer and is 7th longer (than 6th manual) for cruising?

BTW Sounds insane on full chat!

 

[Martyn]

The gearing is pretty close with a single overdrive in 7th. Cruising in 7th the revs are a little higher than I'd like but that could easily be sorted with a 3.15 CWP from an E9x M3.

E9x DCT Box Ratios
1st 4.78
2nd 3.056
3rd 2.153
4th 1.678
5th 1.39
6th 1.203
7th 1

Max speed at 8000rpm with E9x DCT with 3.62

1st 36 mph
2nd 56 mph
3rd 79 mph
4th 102 mph
5th 123 mph
6th 142 mph
7th 171 mph

Compared to the stock ratios, which I assume are the same as the getrag in the M3.

1st 4.23
2nd 2.53
3rd 1.67
4th 1.23
5th 1
6th 0.83

1st 39.4 mph
2nd 65.8 mph
3rd 99.4 mph
4th 134.95 mph
5th 165.99 mph
6th 199.99 mph

If I fitted a 3.15 diff the max speeds are as follows:

Max mph at 8000rpm with E9x DCT with 3.15

1st 41 mph
2nd 64 mph
3rd 91 mph
4th 117 mph
5th 141 mph
6th 163 mph
7th 197 mph

The E9x M3 DCT track boys love fitting 3.62s but I guess not many of them sit and cruise on the motorway

 

[Z4MCoupe86]

What are the benefits of keeping the s54 in this setup vs using the s65? S65 weighs less, makes more power, better weight distribution, and higher potential for power?