Anyone regularly do trackdays with their 35i/s?
- Thread starter DaveP
- Start date
Coming back to this with a renewed optimism.
One of the things that's attractive about M-cars is the MDM driving mode (launched on the E46 M3), where the traction and stability control will allow a decent slip angle on track before intervening.
I know that the 35i/s has various traction and Sport modes, but I'm not clear on whether it offers an equivalent setting or not.
Can anyone clear this up?
One of the things that's attractive about M-cars is the MDM driving mode (launched on the E46 M3), where the traction and stability control will allow a decent slip angle on track before intervening.
I know that the 35i/s has various traction and Sport modes, but I'm not clear on whether it offers an equivalent setting or not.
Can anyone clear this up?
Part 2 to this set of questions concerns the diff.
The complexity of installing the Quaife setup seems like unnecessary faff, and from a bit of research I know that the E82 crowd are often installing the whole E92 M3 subframe and LSD. It looks like they can keep their rear brake setup too.
Has anyone seen this done in an E89, or am I barking up the wrong tree?
The complexity of installing the Quaife setup seems like unnecessary faff, and from a bit of research I know that the E82 crowd are often installing the whole E92 M3 subframe and LSD. It looks like they can keep their rear brake setup too.
Has anyone seen this done in an E89, or am I barking up the wrong tree?
Scottish Borders
DaveP said:
The Quaife is straightforward to fit physically..I assume you are alluding to the fact that the Quaife unit within the diff needs the crown wheel machining,,?
The E89 is similar bit not quite the same as E90..biggest differences are on the rear end where the E89 stuck with a more or less E85 rear end..
So that’s a no..I think
Balls. Thank you. I now recall reading somewhere that the E89 basically uses the E46 rear end setup. I wonder if an E46 M3 rear subframe and diff would work?B21 said:
As for the Quaife diff, it's both REALLY expensive and I'm not a huge fan of the idea of machining the crown wheel. If there was an OEM alternative, that would make me much happier, even if it involved swapping out the whole subframe.
Thanks again.B21 said:
How much slip are we talking in Sport+? Is it a case that you can hang the rear end to a degree, and the system nannies you if it thinks you've gone too far?
I'm thinking about trackdays in less than perfect weather in the UK. If I'm running 380bhp+ (as would be the plan), I don't want to have to turn all the safety systems off to have fun. I also don't want to be in a position where the only option to avoid that would be having an overly intrusive setting that prevents any kind of fun/slip.
This bit is potentially a bit of a deal-breaker, and may be what sees me ending up in something non-Z4.
DaveP said:
The E89 rear was a bastardisation of the E85 rear which was a carry over on the E46..some E85 bits fit E89s many don't..
Quaife is great ..I just handed the diff over to a gearbox specialist for the first one and to Quaife for the second..I have a spare 35i diff if you need to have one for someone to work on
DaveP said:Thanks again.B21 said:
How much slip are we talking in Sport+? Is it a case that you can hang the rear end to a degree, and the system nannies you if it thinks you've gone too far?
I'm thinking about trackdays in less than perfect weather in the UK. If I'm running 380bhp+ (as would be the plan), I don't want to have to turn all the safety systems off to have fun. I also don't want to be in a position where the only option to avoid that would be having an overly intrusive setting that prevents any kind of fun/slip.
This bit is potentially a bit of a deal-breaker, and may be what sees me ending up in something non-Z4.
sports+ lets a small degree of slip..not a huge one as its a road certified ESC..of course with a quaife diff its just going to go around corners anyway..
Suggest you try and find someone with a 35i/s and do a track day..
I only use my car on the road so I've not explored the dynamic limits of the car..
Sadly this feels wildly optimistic, but probably the only real solution to avoid disappointment. No idea who would let a complete stranger loose on their car on track.B21 said:DaveP said:Thanks again.B21 said:
How much slip are we talking in Sport+? Is it a case that you can hang the rear end to a degree, and the system nannies you if it thinks you've gone too far?
I'm thinking about trackdays in less than perfect weather in the UK. If I'm running 380bhp+ (as would be the plan), I don't want to have to turn all the safety systems off to have fun. I also don't want to be in a position where the only option to avoid that would be having an overly intrusive setting that prevents any kind of fun/slip.
This bit is potentially a bit of a deal-breaker, and may be what sees me ending up in something non-Z4.
sports+ lets a small degree of slip..not a huge one as its a road certified ESC..of course with a quaife diff its just going to go around corners anyway..
Suggest you try and find someone with a 35i/s and do a track day..
I only use my car on the road so I've not explored the dynamic limits of the car..