Z4M GT4

[Z4MGT4]

Wow, awesome updates..

Somewhere along the lines you went from LHD to RHD, any notes about that? would really like to hear more about how you did that.
Ive been bumming and arriring about doing that for about a year now, but even after having most of the parts to do it, its still quite a job that I am not looking forwards to do...

(I wonder if I can run on track in oz with a LHD car?)

Just another question, and def not trying to poke at what your doing mate, cos I recon its AWESOME!!!, but did you re-weld the roof strut also? J schedule doesn't allow for having the driver head in the same position as the upper weld meet, unless you weld in the X.

But thats possibly a rule for building new cages, not pre-exisiting ones? not sure about that. either way, this is gonna be freaking AWEESOME!!!

Is that a diff oil temp sensor coming out of the diff casing?

Very very bloody nice!!

Changing to RHD wasn't a lot of extra work because we were starting from a bare shell and all the parts we had were from a RHD car any way. We had to make a hole for the steering column and weld on the column mount. We were also already fitting an AP pedal pedal box. It would be a LOT more work to convert a complete car.

I don't think there is any issues running a LHD car on the track in Australia. This was just a personal choice as I plan to drive it on the road also.

We cross braced the roof bar you can see it in this pic. Cheers

 

[Nictrix]

I dont know where I have heard this in the past but I didnt think that roll cages were legal in a road car.

 

[RedUn]

Of course they are, some road cars some with them as standard

 

[Vanne]

Hmm, can't think of one that comes with a cage from the shop. If your referring to the GT3RS thats not a cage like this one, thats a quarter cage, anything going forwards from the bulk head technically should have issues with rego, and MUST have helmet on when driven. Interiors are designed with soft bits so that when your head hits it, doesn't make your head collapse like a watermelon. anyways, thanks for the update, this is looking sooo good.

I cant wait to hear how you find drivability with the delete kit for the vanos. Should be lots and lots of fun. when is it slated to ship to Tassie?

 

[Z4MGT4]

3 years since my last post Lot of life happened in-between but the car is nearly finished. Not the build thread I was hoping for but here are some pics

 

[Beedub]

awesome!! Vanos delete thing must sing!!

 

[Vanne]

Love it!!! Yeah builds take much much longer than anticipated. Lol..

Where’s your home track, might come have a look one of these days

 

[Ed Doe]

awesome!! Vanos delete thing must sing!!

Am I missing something - I thought deleting the vanos just made it less torquey when 'off-cam', with no real effect in torque/hp when 'on-cam'?

I just thought Vanos was deleted on pure track or race cars because it was another thing to go wrong, a fairly easy (albeit fairly small) weight saving, and because available torque lower in the revs was irrelevant as you're flat out all the time when racing anyway...? Someone please correct me if I'm misinformed please!

 

[Beedub]

awesome!! Vanos delete thing must sing!!

Am I missing something - I thought deleting the vanos just made it less torquey when 'off-cam', with no real effect in torque/hp when 'on-cam'?

I just thought Vanos was deleted on pure track or race cars because it was another thing to go wrong, a fairly easy (albeit fairly small) weight saving, and because available torque lower in the revs was irrelevant as you're flat out all the time when racing anyway...? Someone please correct me if I'm misinformed please!

partly that but you can rev these things to the moon without then vanos in place and of course supporting mods...

 

[TomK]

awesome!! Vanos delete thing must sing!!

Am I missing something - I thought deleting the vanos just made it less torquey when 'off-cam', with no real effect in torque/hp when 'on-cam'?

I just thought Vanos was deleted on pure track or race cars because it was another thing to go wrong, a fairly easy (albeit fairly small) weight saving, and because available torque lower in the revs was irrelevant as you're flat out all the time when racing anyway...? Someone please correct me if I'm misinformed please!

It's usually done to enable running of very high lift cams like 304/296 with a standalone ecu, you can't really tune them properly with the Vanos in place.

 

[Ed Doe]

partly that but you can rev these things to the moon without then vanos in place and of course supporting mods...

I'm not so sure - my understanding is the S54 already has very high piston speeds (4773.33 ft/minute) as a consequence of being relatively long-stroked (bore 87 mm x stroke 91 mm) which is quite unusual in a high-revving engine.... I'd be quite wary of making it rev much harder than Stock...!!

It's usually done to enable running of very high lift cams like 304/296 with a standalone ecu, you can't really tune them properly with the Vanos in place.

Aah ok that makes sense - there's really not a lot you can do to make lumpy cams work nicely down low - I'd imagine trying to get the vanos to work would be a bit of a headache!

 

[TomK]

partly that but you can rev these things to the moon without then vanos in place and of course supporting mods...

I'm not so sure - my understanding is the S54 already has very high piston speeds (4773.33 ft/minute) as a consequence of being relatively long-stroked (bore 87 mm x stroke 91 mm) which is quite unusual in a high-revving engine.... I'd be quite wary of making it rev much harder than Stock...!!

It's usually done to enable running of very high lift cams like 304/296 with a standalone ecu, you can't really tune them properly with the Vanos in place.

Aah ok that makes sense - there's really not a lot you can do to make lumpy cams work nicely down low - I'd imagine trying to get the vanos to work would be a bit of a headache!

I think it's more that the very high valve lift requires the vanos to be deleted to avoid over travel. I may be wrong but I think the rev limit would normally be raised as the cams will make best power higher than 8k. You'll need uprated pistons, valve springs/seats/springs etc going down this route anyway so the increased rev limit isn't an issue so much.
No doubt the OP can tell us more accurately the thinking behind it!

 

[Beedub]

partly that but you can rev these things to the moon without then vanos in place and of course supporting mods...

I'm not so sure - my understanding is the S54 already has very high piston speeds (4773.33 ft/minute) as a consequence of being relatively long-stroked (bore 87 mm x stroke 91 mm) which is quite unusual in a high-revving engine.... I'd be quite wary of making it rev much harder than Stock...!!

It's usually done to enable running of very high lift cams like 304/296 with a standalone ecu, you can't really tune them properly with the Vanos in place.

Aah ok that makes sense - there's really not a lot you can do to make lumpy cams work nicely down low - I'd imagine trying to get the vanos to work would be a bit of a headache!

I think it's more that the very high valve lift requires the vanos to be deleted to avoid over travel. I may be wrong but I think the rev limit would normally be raised as the cams will make best power higher than 8k. You'll need uprated pistons, valve springs/seats/springs etc going down this route anyway so the increased rev limit isn't an issue so much.
No doubt the OP can tell us more accurately the thinking behind it!

this!

 

[Z4MGT4]

This is finally finished. I was going to sell it... But 409bhp and sounding so good, I am having a serious rethink :roll:
https://youtu.be/hqkk9xxK9Ec

 

[BMWZ4MC]

That’s pretty impressive. Have you shipped it out to Tas yet?

 

[Z4MGT4]

No, it's still in the UK until I decide what to do with it.

 

[BMWZ4MC]

Does that mean you’ve yet to see it in the metal?
I presume if you import it as a race/rally car it won’t ever be eligible for road use (outside of very limited distances in Taz)?
That seems a shame - in the UK it should be possible to tweak it until it complies for road use under a Single Vehicle Approval as long as the shell / VIN hasn’t previously been categorised as a write off not fit to return to the road.
The regulations there (UK) are just as strict about safety as they are here (I’m in NSW), but create far fewer absolute and categorical barriers to road use for specialist cars. I personally imported my Zed to Australia as a road car already modified for track use. It would have been far more difficult to undertake the modifications de novo in Sydney, and impossible to import it at all had I not done so when I emigrated here.

 

[Z4MGT4]

I have seen it. I pop back to the UK fairly regularly. I can register it here as a competition car and drive it on the road for "motoring events" servicing and "testing mechanical work"

 

[BMWZ4MC]

NSW traffic police would shoot you for less!

 

[Vanne]

Yes, yes they would...

Congrats, that's a good looking curve.

Mine will be imported as track only.