Z4 coupe racecar

I

iainw

Member
Hi,



I am looking to build a z4 racing car/ tack car, Before i really get into the project i just wanted to check out a few things to ensure that things work as i assume they do.



The car would be based around the Z4 e85/6 bodyshell (once i have found a usable coupe bodyshell that is)



The questions

will an e46 m4 rear axle drop in?

Is the ABS body loom fundamentally separate from the other body electrics?

I am assuming that the engine bay is dimensionally the same as a Z4m

Are their any body shell differences between a "cooking" Z4 and a Z4M

Does the rear floor require additional bracing to cope with track use.

Does the dash cluster take engine data via can bus? or is it the usual tacho line etc





Many thanks in advance!



cheers



Iain
 
Welcome to the forum. :thumbsup:

I wish I could help with your questions, but I'm sure someone will be able to.

A couple of members I know who track their cars have got a good deal on a Quaife LSD from Birds, so I'm guessing a rear end transplant from an E46 M3 may not be an option.

Looking forward to hearing more about your project though. :thumbsup:

Iain.
 
hi, thanks for the response and the welcome.

I am not really interested in a ATB, as for track work i don't think they are much cop, neither is the Shear pumped e46 unit tbh.

What i would be looking to do is put an e36 210mm evo cluster into the e46 case using an e46 rear axle, complete with training arms and driveshafts.

Propshaft would likely be an e36 m3 rear section with the e46 front mated to an e36 5 speed, engine would be a heavily re worked s50b30 making between 350 and 380HP.

Suspension would be e36 m3 kingpins mated to intrax four way racing dampers with the turrets drilled to suit the top mounts lower arms would likley be e46 m3, steered with an e46 purple tag rack.

Abs would be retained and the car would either use bosh motorsport ASC and ABS or Motorsport abs with the steering angle sensor deleted and traction handled through a racelogic system.

My current racer runs racelogic and its outstanding and will easily piggy back the abs unit.

Cage would probably be touring car spec but less a dash bar and running a Y door bar as its just so much easier getting in and out.

My main concern is how well the body loom will mate with the s50b30 engine harness and how easily the abs loom can be separated (and of course the axle fitment.

This is broadly the specification of my current car though its only making 330hp and the cage is not to the spec i would like.


Proving more difficult than expected to get a usable coupe shell i must admit.
 
There was an old thread kicking around about setting up a z4 for track, I remember mentions of disconnecting the rear anti roll bar. :driving: watching with interest
 
Joycey said:
There was an old thread kicking around about setting up a z4 for track, I remember mentions of disconnecting the rear anti roll bar. :driving: watching with interest
Click to expand...



Yea, thats quite common, essentially people assume that stiffer means better handling, which is not always true, it means the car will stay flatter but actually you will have less traction. As the hillclimbs i do are road courses i don't run insane spring rates and don't run a rear roll bar, also i would be running a full rear coilover not a damper and barrel spring, so the setup is very different.



MJJamieson said:
There's a Coupe race prepared shell on eBay, seems expensive for what you get though.
Click to expand...



Where!!! i cant find the bugger.. do you have a link?



Fishy Dave said:
Hi Ian,



Just interested why you don't choose an M from the beginning? :)
Click to expand...



Cost and diminishing return, i can buy a whole z4 coupe for 6k, strip it make maybe 3k back, i could buy a z4m for probably 20k, but would make maybe 10k back at best. i have most of the parts i need, an Z4M simply raises the cost without much benefit.
 
edit: found the shell, hmm, its been dipped, and is covered in surface rust, I will give the guy a call and see what the deal is with the other parts.
 
the M as the battery in a different space in the boot to allow for the twin exhaust so slightly different there
 
iainw said:
Cost and diminishing return, i can buy a whole z4 coupe for 6k, strip it make maybe 3k back, i could buy a z4m for probably 20k, but would make maybe 10k back at best. i have most of the parts i need, an Z4M simply raises the cost without much benefit.
Click to expand...

That makes sense, I was thinking less work and greater eligibility for race series (there are quite a few that don't allow non original engine types). The spec of your car should be pretty potent. 8)
 
You must log in or register to reply here.
Back
Top Bottom