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Sohailnisar
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Post by Sohailnisar » Sat Sep 16, 2017 1:08 pm

Darren Slone wrote: Fri Sep 15, 2017 5:03 pm Lovely looking car 8) welcome aboard :driving:
:thumbsup:

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Post by MrPT » Sat Sep 16, 2017 2:33 pm

Sohailnisar wrote: Sat Sep 16, 2017 1:07 pm
MrPT wrote: Thu Sep 14, 2017 11:45 pm 10mm spacer on the front axle is perfect with CSLs or reps with the same offsets.

I'm going up to 265/35 and 235/40 sizes to improve the ride/handling. Only done the rears so far. Looks like a sexy tractor! :D
Got any pics?

Whats the ride like with these?
Even with just the rear tyres changed it is much better than what I had before (275/30) on B roads and over expansion gaps etc. When moving to 19s I put the suspension to nearly full soft and the ride was acceptable, but still not compliant enough to handle sudden, small changes in the road surface. An 8cm sidewall is silly, in hindsight, but I wanted to keep the look of the 19s instead of moving to 18s.
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Going to change the fronts soon too. It looks a bit odd, currently, but the main issue is the large difference between front/rear rolling radius, which could be affecting the DSC. Since I dropped the front to match the reduced arch gap at the rear, the car is also raked forward enough now that I've had to be more careful on speed bumps etc.

I'm not sure you will be able to do 235/40 and 265/35 without height-adjustable suspension, but 225/40 and 255/35 apparently works well. 245/35 and 265/35 might rub a little, but also looks like a good combination to go for since you have the added bonus of it reducing the factory stagger (helps remove understeer).
2008 Z4MC: heavy wheels | crap suspension | skittish rear end | wobbly engine | not enough induction noise | underwhelming turn in | inconsistent braking | lardy battery | chubby steering wheel
2006 Z4 2.5si: gone

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Post by Beedub » Sat Sep 16, 2017 3:50 pm

i run 18s on semi slick 235/40sF 265/35s R

Performance from this setup is fantastic, haven't noticed any more intervention with the DSC tbh but these have been on for a while.. Traction until warm can be limited , no rubbing at full compression, car is lowered only around 10mm from stock as you can see very conservative i can fit my hand right into the wheel arch , i wanted as much compliance as possible from the track based suspension setup, which mean travel needed to be retained, The tyre size give a lovely fat sidewall, which imo really suits the short and squat look of the z4M

From my experience this car behaves best on 18s, do lots of research before making your wheel choice.
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Post by Beedub » Sat Sep 16, 2017 3:54 pm

Front ,
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Sohailnisar
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Post by Sohailnisar » Sat Sep 16, 2017 5:38 pm

MrPT wrote: Sat Sep 16, 2017 2:33 pm
Sohailnisar wrote: Sat Sep 16, 2017 1:07 pm
MrPT wrote: Thu Sep 14, 2017 11:45 pm 10mm spacer on the front axle is perfect with CSLs or reps with the same offsets.

I'm going up to 265/35 and 235/40 sizes to improve the ride/handling. Only done the rears so far. Looks like a sexy tractor! :D
Got any pics?

Whats the ride like with these?
Even with just the rear tyres changed it is much better than what I had before (275/30) on B roads and over expansion gaps etc. When moving to 19s I put the suspension to nearly full soft and the ride was acceptable, but still not compliant enough to handle sudden, small changes in the road surface. An 8cm sidewall is silly, in hindsight, but I wanted to keep the look of the 19s instead of moving to 18s.

IMAG4886_1.jpg

Going to change the fronts soon too. It looks a bit odd, currently, but the main issue is the large difference between front/rear rolling radius, which could be affecting the DSC. Since I dropped the front to match the reduced arch gap at the rear, the car is also raked forward enough now that I've had to be more careful on speed bumps etc.

I'm not sure you will be able to do 235/40 and 265/35 without height-adjustable suspension, but 225/40 and 255/35 apparently works well. 245/35 and 265/35 might rub a little, but also looks like a good combination to go for since you have the added bonus of it reducing the factory stagger (helps remove understeer).
Thank you for that! Some useful info there! :thumbsup:

Car looks lovely. What suspension set up here you running?

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Post by Sohailnisar » Sat Sep 16, 2017 5:42 pm

Beedub wrote: Sat Sep 16, 2017 3:50 pm i run 18s on semi slick 235/40sF 265/35s R

Performance from this setup is fantastic, haven't noticed any more intervention with the DSC tbh but these have been on for a while.. Traction until warm can be limited , no rubbing at full compression, car is lowered only around 10mm from stock as you can see very conservative i can fit my hand right into the wheel arch , i wanted as much compliance as possible from the track based suspension setup, which mean travel needed to be retained, The tyre size give a lovely fat sidewall, which imo really suits the short and squat look of the z4M

From my experience this car behaves best on 18s, do lots of research before making your wheel choice.
I've not seen them wheels on a Z4M before - what are they?

I do agree - I did think 18s look better on a Z4M. But after seeing some lovely examples with 19s on I'm 50:50.
I don't want to break the bank either - 19" CSL Reps are pretty easy to come buy for a decent price. With most other stuff it seems to be £1k+. I guess the alternative is to leave it on the wheels its on with maybe a powder coat.

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Post by Beedub » Sat Sep 16, 2017 6:54 pm

Sohailnisar wrote: Sat Sep 16, 2017 5:42 pm
Beedub wrote: Sat Sep 16, 2017 3:50 pm i run 18s on semi slick 235/40sF 265/35s R

Performance from this setup is fantastic, haven't noticed any more intervention with the DSC tbh but these have been on for a while.. Traction until warm can be limited , no rubbing at full compression, car is lowered only around 10mm from stock as you can see very conservative i can fit my hand right into the wheel arch , i wanted as much compliance as possible from the track based suspension setup, which mean travel needed to be retained, The tyre size give a lovely fat sidewall, which imo really suits the short and squat look of the z4M

From my experience this car behaves best on 18s, do lots of research before making your wheel choice.
I've not seen them wheels on a Z4M before - what are they?

I do agree - I did think 18s look better on a Z4M. But after seeing some lovely examples with 19s on I'm 50:50.
I don't want to break the bank either - 19" CSL Reps are pretty easy to come buy for a decent price. With most other stuff it seems to be £1k+. I guess the alternative is to leave it on the wheels its on with maybe a powder coat.
These are the rare cromodora 260M 18" stock wheel the originally came on the e92 m3
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Post by MrPT » Sat Sep 16, 2017 7:56 pm

Sohailnisar wrote: Sat Sep 16, 2017 5:38 pmCar looks lovely. What suspension set up here you running?
Thanks. It's on KW V3s - quite popular on here. Rear is at stock height; front dropped 24mm at the moment!
2008 Z4MC: heavy wheels | crap suspension | skittish rear end | wobbly engine | not enough induction noise | underwhelming turn in | inconsistent braking | lardy battery | chubby steering wheel
2006 Z4 2.5si: gone

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Post by Beedub » Sun Sep 17, 2017 12:39 pm

MrPT wrote: Sat Sep 16, 2017 7:56 pm
Sohailnisar wrote: Sat Sep 16, 2017 5:38 pmCar looks lovely. What suspension set up here you running?
Thanks. It's on KW V3s - quite popular on here. Rear is at stock height; front dropped 24mm at the moment!
Kw's really are the business, supplied stuff on both generations of the GTS models too.... albeit in clubsport spec.
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Post by Sohailnisar » Mon Sep 18, 2017 10:11 am

Please excuse the dirt on the car, but first mod done...
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Looks much better now. Hopefully better pictures to follow once it's been washed and waxed.

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Post by Sohailnisar » Mon Sep 18, 2017 10:27 am

So I've been driving this for around a week now, here's some first thoughts:
  • It takes a long time to warm up!
- My drive to work is about 20 minutes, the car is fully warm when I've parked up - great!
In my S2000 I was very careful to not VTEC when cold, so to be safe I'd keep revs below 4k when cold.
I've noticed the amber lights that move up the rev range as the car gets warmer. What do people keep the revs at when cold?
At what point do people think it's safe to give it the beans?
  • The gearbox takes a little getting used to
- when the car is cold - that thing is stiff! Throw is fairly long between 1st and 2nd - this is comparing to the S2000 though which was a very short throw.
  • It's not that harsh!
- so again comparing to the S2000 here - but the ride is not that uncomfortable! I've got heated, electric seats - it's so much more refined and comfortable!
  • The engine!
- WOW! You really have to drive one to realise what all the fuss is about. The smiles get bigger the more I get to know the car.

I'm hyper aware of any sounds on my cars, so couple of queries:
  • When changing from 1st to 2nd (to a lesser extent shifting up the other gears) - there's a bit of a 'wobble' when I engage the clutch to shift gear, I can't feel anything it's just that I can hear a wobble
  • If I sit around 3.5k revs - it sounds like crackling - I know the S54 is a noisy engine - so my guess is that's just what it sounds like?

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Post by MrPT » Tue Sep 19, 2017 12:03 am

Really interesting to hear your thoughts. S2000 has a pretty cool engine too.

It does take a while to warm up, yep. Consensus seems to be that you should stick below 3k until the oil is up up temp at around 80-85C.

Gearbox is stiff - comparisons with the Honda usually aren't that flattering! 1st to 2nd needs to be either super gentle or super punchy. Anything in the middle tends to be a bit jerky.

3.5k could be Vanos rattling, although that's usually a little lower in the range. It's a horrible, gravelly metallic sound but is harmless. There was a service bulletin about it - SI B 11 05 06.
2008 Z4MC: heavy wheels | crap suspension | skittish rear end | wobbly engine | not enough induction noise | underwhelming turn in | inconsistent braking | lardy battery | chubby steering wheel
2006 Z4 2.5si: gone

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Post by Sohailnisar » Wed Sep 20, 2017 7:48 pm

MrPT wrote: Tue Sep 19, 2017 12:03 am Really interesting to hear your thoughts. S2000 has a pretty cool engine too.

It does take a while to warm up, yep. Consensus seems to be that you should stick below 3k until the oil is up up temp at around 80-85C.

Gearbox is stiff - comparisons with the Honda usually aren't that flattering! 1st to 2nd needs to be either super gentle or super punchy. Anything in the middle tends to be a bit jerky.

3.5k could be Vanos rattling, although that's usually a little lower in the range. It's a horrible, gravelly metallic sound but is harmless. There was a service bulletin about it - SI B 11 05 06.
Thank you MrPT :thumbsup:

Did a bit of quick research, few people have mentioned it on M3cutters too, seems like it's just what the S54 sounds like.

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Post by Sohailnisar » Wed Sep 20, 2017 7:50 pm

Got my oil analysis back. Looks like a clean bill of health to me...
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Post by RedUn » Thu Sep 21, 2017 12:04 am

Remove the cdv, just like on the S2000. Helps a lot with the gear change :thumbsup:

Ex S2000 owner 8)
IMOLA Z4///MR

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