Atacama Yellow 35is build thread
- Thread starter B21
- Start date
earthdweller
Senior member
What a great read
Keep it up Peter
As an aside how much is Mrs B’s forbearance costing you in horses
Keep it up Peter
As an aside how much is Mrs B’s forbearance costing you in horses
Scottish Borders
Hi Si,
I guess I made it complicated for myself…
Law of unintended consequences plus try something different plus trying to address a wayward 35is..
So by buying the 437Ms you really need a 235 or 245 on the front and a 275 or 285 rears..being an E89 (or E85) you need to keep the rolling radius within about 1%.
On M2 etc they use a 35 profile but to get it to work within the constraints of the DSC the ‘best’ combo is 235/35 19 and 275/30 19 on the rear.
So it turns out that 275/30 19 is quite restrictive in terms of tyre choices.
With the mods at this stage I should end up at around 420 BHP and about 600nm.
Given that the handling of the 35is is quite wayward, I’ve hit it with a Quaife LSD, uprated ARBs, plus Ohlins and various M3 steering parts to try and tame it.
As part of taming it I wanted ‘the best’ tyres..
Many people rave about the Michelin Sport 4 and in a 275/30 19 you can only get it in a Sport 4S version.
The Sports Conti 6 is about to be obsoleted by the Sports Contact 7, but that is not yet available in a 275/30 19 size.
At the same time given I didn’t want to simply repeat the admittedly winning setup of the 20i I built I’d thought I’d try something different.
So that rules out the Goodyear Assy 5 and the Conti Sports Contact 5/5P/6
Frankly I wasn’t brave enough to try the new Bridgestone Sport..I see it has had overall very good reviews, maybe just not quite so good in the wet as others and open questions about predicted life.
So I went for the Michelin 4S.
I’d be very interested to see how you get on with the new Bridgestone Sports
So I guess we can compare notes..if and when Conti release the Sports 7 I may well try them as they should match if not exceed the 4S for my kind of driving.
Long ramble ..
I guess I made it complicated for myself…
Law of unintended consequences plus try something different plus trying to address a wayward 35is..
So by buying the 437Ms you really need a 235 or 245 on the front and a 275 or 285 rears..being an E89 (or E85) you need to keep the rolling radius within about 1%.
On M2 etc they use a 35 profile but to get it to work within the constraints of the DSC the ‘best’ combo is 235/35 19 and 275/30 19 on the rear.
So it turns out that 275/30 19 is quite restrictive in terms of tyre choices.
With the mods at this stage I should end up at around 420 BHP and about 600nm.
Given that the handling of the 35is is quite wayward, I’ve hit it with a Quaife LSD, uprated ARBs, plus Ohlins and various M3 steering parts to try and tame it.
As part of taming it I wanted ‘the best’ tyres..
Many people rave about the Michelin Sport 4 and in a 275/30 19 you can only get it in a Sport 4S version.
The Sports Conti 6 is about to be obsoleted by the Sports Contact 7, but that is not yet available in a 275/30 19 size.
At the same time given I didn’t want to simply repeat the admittedly winning setup of the 20i I built I’d thought I’d try something different.
So that rules out the Goodyear Assy 5 and the Conti Sports Contact 5/5P/6
Frankly I wasn’t brave enough to try the new Bridgestone Sport..I see it has had overall very good reviews, maybe just not quite so good in the wet as others and open questions about predicted life.
So I went for the Michelin 4S.
I’d be very interested to see how you get on with the new Bridgestone Sports
So I guess we can compare notes..if and when Conti release the Sports 7 I may well try them as they should match if not exceed the 4S for my kind of driving.
Long ramble ..
earthdweller said:What a great read
Keep it up Peter
As an aside how much is Mrs B’s forbearance costing you in horses
It’s costing a lot…
New horse, new Mercedes S Class field shelter, new hay store, two sets of new pastures..
Attachments
Wow ! A proverbial minefield !B21 said:Hi Si,
I guess I made it complicated for myself…
Law of unintended consequences plus try something different plus trying to address a wayward 35is..
So by buying the 437Ms you really need a 235 or 245 on the front and a 275 or 285 rears..being an E89 (or E85) you need to keep the rolling radius within about 1%.
On M2 etc they use a 35 profile but to get it to work within the constraints of the DSC the ‘best’ combo is 235/35 19 and 275/30 19 on the rear.
So it turns out that 275/30 19 is quite restrictive in terms of tyre choices.
With the mods at this stage I should end up at around 420 BHP and about 600nm.
Given that the handling of the 35is is quite wayward, I’ve hit it with a Quaife LSD, uprated ARBs, plus Ohlins and various M3 steering parts to try and tame it.
As part of taming it I wanted ‘the best’ tyres..
Many people rave about the Michelin Sport 4 and in a 275/30 19 you can only get it in a Sport 4S version.
The Sports Conti 6 is about to be obsoleted by the Sports Contact 7, but that is not yet available in a 275/30 19 size.
At the same time given I didn’t want to simply repeat the admittedly winning setup of the 20i I built I’d thought I’d try something different.
So that rules out the Goodyear Assy 5 and the Conti Sports Contact 5/5P/6
Frankly I wasn’t brave enough to try the new Bridgestone Sport..I see it has had overall very good reviews, maybe just not quite so good in the wet as others and open questions about predicted life.
So I went for the Michelin 4S.
I’d be very interested to see how you get on with the new Bridgestone Sports
So I guess we can compare notes..if and when Conti release the Sports 7 I may well try them as they should match if not exceed the 4S for my kind of driving.
Long ramble ..
I know from other cars I've had that choice gets complicated and a whole lot more expensive in 19" for sure.
Not 100% certain yet about the Potenza Sports. The wheels I'm having refurb'd came with PS4 tyres. The rears are shot but the fronts are almost new so toying with the idea of just replacing the rears and running PS4 all round...possibly. Just never had Michelins before
patriot66 said:Wow ! A proverbial minefield !B21 said:Hi Si,
I guess I made it complicated for myself…
Law of unintended consequences plus try something different plus trying to address a wayward 35is..
So by buying the 437Ms you really need a 235 or 245 on the front and a 275 or 285 rears..being an E89 (or E85) you need to keep the rolling radius within about 1%.
On M2 etc they use a 35 profile but to get it to work within the constraints of the DSC the ‘best’ combo is 235/35 19 and 275/30 19 on the rear.
So it turns out that 275/30 19 is quite restrictive in terms of tyre choices.
With the mods at this stage I should end up at around 420 BHP and about 600nm.
Given that the handling of the 35is is quite wayward, I’ve hit it with a Quaife LSD, uprated ARBs, plus Ohlins and various M3 steering parts to try and tame it.
As part of taming it I wanted ‘the best’ tyres..
Many people rave about the Michelin Sport 4 and in a 275/30 19 you can only get it in a Sport 4S version.
The Sports Conti 6 is about to be obsoleted by the Sports Contact 7, but that is not yet available in a 275/30 19 size.
At the same time given I didn’t want to simply repeat the admittedly winning setup of the 20i I built I’d thought I’d try something different.
So that rules out the Goodyear Assy 5 and the Conti Sports Contact 5/5P/6
Frankly I wasn’t brave enough to try the new Bridgestone Sport..I see it has had overall very good reviews, maybe just not quite so good in the wet as others and open questions about predicted life.
So I went for the Michelin 4S.
I’d be very interested to see how you get on with the new Bridgestone Sports
So I guess we can compare notes..if and when Conti release the Sports 7 I may well try them as they should match if not exceed the 4S for my kind of driving.
Long ramble ..
I know from other cars I've had that choice gets complicated and a whole lot more expensive in 19" for sure.
Not 100% certain yet about the Potenza Sports. The wheels I'm having refurb'd came with PS4 tyres. The rears are shot but the fronts are almost new so toying with the idea of just replacing the rears and running PS4 all round...possibly. Just never had Michelins before
Personally I’d just go with some rear PS4s and see how you get on..
I’ve never been a Michelin fan but they do consistently score well on tests, if not always number 1.
IMHO a big big issue is the tyre / chassis match..many of the tests are on front wheel drive cars which I think put a different set of stresses compared to the ‘classical’ layout..
Also spring rates / suspension set up and it’s interaction with the tyres is another variable..
The E85s seems to do well on the GY Assy 5 plus some of the mid tier tyres…
With all that boost you’ll need some new tyres shortly afterwards anyway
Then try some Bridgestone’s with a few more reviews..
"all that boost".....woooosh !B21 said:patriot66 said:Wow ! A proverbial minefield !B21 said:Hi Si,
I guess I made it complicated for myself…
Law of unintended consequences plus try something different plus trying to address a wayward 35is..
So by buying the 437Ms you really need a 235 or 245 on the front and a 275 or 285 rears..being an E89 (or E85) you need to keep the rolling radius within about 1%.
On M2 etc they use a 35 profile but to get it to work within the constraints of the DSC the ‘best’ combo is 235/35 19 and 275/30 19 on the rear.
So it turns out that 275/30 19 is quite restrictive in terms of tyre choices.
With the mods at this stage I should end up at around 420 BHP and about 600nm.
Given that the handling of the 35is is quite wayward, I’ve hit it with a Quaife LSD, uprated ARBs, plus Ohlins and various M3 steering parts to try and tame it.
As part of taming it I wanted ‘the best’ tyres..
Many people rave about the Michelin Sport 4 and in a 275/30 19 you can only get it in a Sport 4S version.
The Sports Conti 6 is about to be obsoleted by the Sports Contact 7, but that is not yet available in a 275/30 19 size.
At the same time given I didn’t want to simply repeat the admittedly winning setup of the 20i I built I’d thought I’d try something different.
So that rules out the Goodyear Assy 5 and the Conti Sports Contact 5/5P/6
Frankly I wasn’t brave enough to try the new Bridgestone Sport..I see it has had overall very good reviews, maybe just not quite so good in the wet as others and open questions about predicted life.
So I went for the Michelin 4S.
I’d be very interested to see how you get on with the new Bridgestone Sports
So I guess we can compare notes..if and when Conti release the Sports 7 I may well try them as they should match if not exceed the 4S for my kind of driving.
Long ramble ..
I know from other cars I've had that choice gets complicated and a whole lot more expensive in 19" for sure.
Not 100% certain yet about the Potenza Sports. The wheels I'm having refurb'd came with PS4 tyres. The rears are shot but the fronts are almost new so toying with the idea of just replacing the rears and running PS4 all round...possibly. Just never had Michelins before
Personally I’d just go with some rear PS4s and see how you get on..
I’ve never been a Michelin fan but they do consistently score well on tests, if not always number 1.
IMHO a big big issue is the tyre / chassis match..many of the tests are on front wheel drive cars which I think put a different set of stresses compared to the ‘classical’ layout..
Also spring rates / suspension set up and it’s i"nteraction with the tyres is another variable..
The E85s seems to do well on the GY Assy 5 plus some of the mid tier tyres…
With all that boost you’ll need some new tyres shortly afterwards anyway
Then try some Bridgestone’s with a few more reviews..
Joking aside, 2 rear PS4's seems the sensible option and is also cheaper than 4 x Pot.Sports, plus by the time I've trollied the PS4's those new Conti 7s may be in the mix also
Si, yup that all makes sense..at the end of the day as much discussed very few people on a public road are going to extend their car / tyres to the point where any of the technical differences would manifest themselves.. :!:
I think that’s where tyres like the GY Assy 3/5 and Conti as well as some others score..they give the driver a very posting feeling, irrespective of the fact that their absolute lap times ‘ stopping distances vary a very small amount from whoever the winner on that particular test is..
:!: I think that’s where tyres like the GY Assy 3/5 and Conti as well as some others score..they give the driver a very posting feeling, irrespective of the fact that their absolute lap times ‘ stopping distances vary a very small amount from whoever the winner on that particular test is..
Couldn’t resist it, with Patriot 66 getting supercharge, AlienZed likely to be re-mapped and husseyin88 getting mega size turbos I pulled the trigger on some TTE500 German made turbo upgrades for the N54…more boost baby..
https://tteglobal.com/bmw/1-series/e82e88e87/135i/71/tte500-n54-upgrade-turbochargers
https://tteglobal.com/bmw/1-series/e82e88e87/135i/71/tte500-n54-upgrade-turbochargers
Attachments
Coming to the end of the initial upgrade program…
So 6 pot Brembo Performance Brake upgrade migrated from the 20i fitted along with colour matched 35is rear calipers.
New Michelin Pilot Sports 4S on the new 437M rims awaiting fitment.
Ohlins uprated suspension fitted and H&R uprated ARBs..the original ARB looks very spindly given the weight and power of the 35is.
VSRF downpipes fitted after a bit of cutting n shutting on the rest of the exhaust to get a good fit.
The 35is unique plastic trims across front lower mesh grills now removed.
Awaiting fitment of the new Index 12 injectors and coils then out for some initial testing and evaluation.
Once the new injectors fitted I’ll apply the MHD stage 2+ remap plus xHP DCT box updates to cope with the changes..
Then off to the dyno…looking for 420 ish BHP on this transient stage of engine tweaking ..
So 6 pot Brembo Performance Brake upgrade migrated from the 20i fitted along with colour matched 35is rear calipers.
New Michelin Pilot Sports 4S on the new 437M rims awaiting fitment.
Ohlins uprated suspension fitted and H&R uprated ARBs..the original ARB looks very spindly given the weight and power of the 35is.
VSRF downpipes fitted after a bit of cutting n shutting on the rest of the exhaust to get a good fit.
The 35is unique plastic trims across front lower mesh grills now removed.
Awaiting fitment of the new Index 12 injectors and coils then out for some initial testing and evaluation.
Once the new injectors fitted I’ll apply the MHD stage 2+ remap plus xHP DCT box updates to cope with the changes..
Then off to the dyno…looking for 420 ish BHP on this transient stage of engine tweaking ..
Attachments
I see you couldn't resist spending the kids inheritance!
The front side grills look better without the plastic silver grey parts.
Looking forward to seeing how it all performs in reality rather than just on paper.
Followed you and fitted Bilstein B8 dampers and Supplex msport springs on mine..quite a transformation.
The front side grills look better without the plastic silver grey parts.
Looking forward to seeing how it all performs in reality rather than just on paper.
Followed you and fitted Bilstein B8 dampers and Supplex msport springs on mine..quite a transformation.
Beeacon said:
Thank you..
They are 338 x26 mm so 10 mm smaller than the stock 35is front brakes.
https://www.turnermotorsport.com/p-3163-genuine-bmw-performance-front-brake-kit-e90-e92-325i-328i/
On the flip side they have a much bigger pad, 6 pots gripping them not one and FWIW the discs are ventilated too.
I never quite undertsood why they picked a unique front brake for the 35i, given the range they had..sounded like the marketing department again..
On the N20 powered car they were very powerful, in fact until I reprogrammed the DSC as they had too much initial bite / grab by toggling the 'performance brake' option on.
On the 35i there is no 'performance brake' option in the DCS list, so I'll see how I get on and maybe hand tailor some of the DSC parameters.
Ed.Straker said:
Hi Ed, yes I think the front grills look better now without what I regarded as the naff plastic items. Of course if I could have found an AY 35i Msport would have saved me maybe some costs and efforts.
I'm planning a tour to see a friend down near Bath soon who has been battling 'C'..hopefuuly before Christmas , so that should be a good shakedown.
Reference the B8 dampers..they were great on the N20..I'm sure that would have been a (much) lower cost option on the 35is..but couldn't resist the Ohlins once I discovered them..they transformed every bike I put them on..here's hoping.
Since we don't have any kids I've been spending their (if they existed) inheritance for a long long time!
john-e89 said:I doubt you'll need to mess with DSC tbh, I have M4 discs and 4 pots on the 35i and they're superb, much harder bite with no grabbing. Obvs you have 6 pots but you have considerably smaller discs than me so I'd imagine it evens it out.
John, thanks for the heads-up
We'll see how all the various parts bed in /shake down..now I've moved to 19" wheels there is always room for a VBBK!
B21 said:john-e89 said:I doubt you'll need to mess with DSC tbh, I have M4 discs and 4 pots on the 35i and they're superb, much harder bite with no grabbing. Obvs you have 6 pots but you have considerably smaller discs than me so I'd imagine it evens it out.
John, thanks for the heads-up
We'll see how all the various parts bed in /shake down..now I've moved to 19" wheels there is always room for a VBBK!
I think you're gonna need one with those new b!owers...!! :lol:
Wish I hadn't seen those.....
:roll: :lol:
john-e89 said:B21 said:john-e89 said:I doubt you'll need to mess with DSC tbh, I have M4 discs and 4 pots on the 35i and they're superb, much harder bite with no grabbing. Obvs you have 6 pots but you have considerably smaller discs than me so I'd imagine it evens it out.
John, thanks for the heads-up
We'll see how all the various parts bed in /shake down..now I've moved to 19" wheels there is always room for a VBBK!
I think you're gonna need one with those new b!owers...!! :lol:
Wish I hadn't seen those.....
I'm oh so predictable..always ends up going this way...starting to think maybe I shoukd get the TTE600s or even the TTE680?
https://tteglobal.com/bmw/z-series/z4-e89/
Some interesting mods already in your first instalment!
Removing the trims on the lower grilles and fitting black kidneys definitely improve the look of the front end. The more I see them the more incongruous the chrome kidney surrounds look when there is no other chrome on Z4s. :roll:
Removing the trims on the lower grilles and fitting black kidneys definitely improve the look of the front end. The more I see them the more incongruous the chrome kidney surrounds look when there is no other chrome on Z4s. :roll:
Mr Tidy said:
To be fair I think the silver trims are OK with colours like DSB…the chrome as you say doesn’t gel for me.
The AY and Valencia Orange as discussed really need black as the counterpoint…at least IMHO..
Looking forward to getting the rear spoiler and reverse the colours on the rear
