2.0 sdrive to 2.8i performance. ?
- Thread starter brittas
- Start date
Twin Turbo
Active member
I do feel, I am getting an bashing in here lol
There is another variable I would like to bring into the question - that of handling.
I have not driven an Z4 35i with vigour - so my only comparison is my old E92 335i - and the Z4 28i defiantly turns into corners much easier - must be due to the 100KG lighter engine. Considering the E89 and E92 share the same suspension components - I can only assume the Z89 35i would handle in an similar manor.
What I have found for comparison reasons is comparing the 328i and 335i - like for like cars but different engines.
Motortrend Figure-8
328i 0:25.90
335i 0:25.70
Below is an video of me at Donnington last year on runflats
https://youtu.be/yaQSxtMeQBI
There is another variable I would like to bring into the question - that of handling.
I have not driven an Z4 35i with vigour - so my only comparison is my old E92 335i - and the Z4 28i defiantly turns into corners much easier - must be due to the 100KG lighter engine. Considering the E89 and E92 share the same suspension components - I can only assume the Z89 35i would handle in an similar manor.
What I have found for comparison reasons is comparing the 328i and 335i - like for like cars but different engines.
Motortrend Figure-8
328i 0:25.90
335i 0:25.70
Below is an video of me at Donnington last year on runflats
https://youtu.be/yaQSxtMeQBI
Twin Turbo
Active member
Z4M-2006 said:
No
As techathy has previously said that an basic 35is compared to an 35i financially no difference in price with EDC added.
As I am seriously considering an 35is, my next car.
When I was buying that was true but BMW have changed the level of support on the 35i, it's now the same as the 35iS. The 35i w/DCT & EDC comes out at £395 less than a 35iS. So as long as you want DCT + EDC that's £400 for a factory warranted remap & sports exhaust.; a bit of a bargain in my book.
Twin Turbo
Active member
Z4M-2006 said:
Sorry should have been clearer, none of the cars I have owned have had EDC - So I can only surmise with 35i without EDC. But since I have not driven one with enthusiasm - my only comparison is my old E92 - but that is not an true comparison.
Twin Turbo
Active member
Well I am hoping with my Z4 without EDC I will notice improvements from removing the RF and having Michelin Pilot Super Sport tyres and lowering the springs to remove the UNDER stear issues i have encountered.
However there are an few peeps who have really made there Z4's into track cars and one persons recommendation are the below
Stage 1:
- Stock struts/shocks (with adaptive suspension)
- Eibach or H&R lowering springs
- Front M3 tension struts
- Front adjustable sway bar end links
- Rear adjustable camber arms
Stage 2:
- Everything in Stage 1
- H&R front and rear sway bars
- rear trailing arm bushing limiter
- rear upper wishbone inner ball joint replacement (Group N or Turner)
Stage 3:
- Everything in Stage 1 & 2
- Vorshlag or Ground Control front camber plates
- Fully adjustable coilovers
- rear subframe bushings (if available)
However there are an few peeps who have really made there Z4's into track cars and one persons recommendation are the below
Stage 1:
- Stock struts/shocks (with adaptive suspension)
- Eibach or H&R lowering springs
- Front M3 tension struts
- Front adjustable sway bar end links
- Rear adjustable camber arms
Stage 2:
- Everything in Stage 1
- H&R front and rear sway bars
- rear trailing arm bushing limiter
- rear upper wishbone inner ball joint replacement (Group N or Turner)
Stage 3:
- Everything in Stage 1 & 2
- Vorshlag or Ground Control front camber plates
- Fully adjustable coilovers
- rear subframe bushings (if available)
Twin Turbo said:
The e89 is a 'soft' car, deliberately made so by BMW as it gave up trying to chase Porsche and went the Mercedes route of a a 'nicer' GT. When looking for ultimate handling then the e89 is not a good place to start so I'm not surprised at the list of modifications required to make it into a 'track weapon'.
Regarding oversteer, road tests always referred to the e89 being, inherently, an understeerer but I, like you, have found it to oversteer quite readily - a bit too readily in some circumstances! I think the RFTs are a major culprit in this regard.
As for fuel consumption that others mention, mine (and my previous one) runs an overall average of 26mpg. I have only ever got it (just) the upper side of 30mpg with long motorway cruises at a steady 70mph. I must admit I have never undertaken a long jaunt at a steady 50mph, not in any vehicle I have ever driven!
stuartinzg
Active member
Garvin said:
It can take many forms, including as a GT3 race car where it was quite successful.
These mods would be required on any car to turn it into anything useful on the track. To get the best handling improvements you would need to remove weight (imho) with the biggest weight reducion being the removal of all the roof gear and replacement to a fixed roof - it would probably save a 200kg or more.
Twin Turbo
Active member
Well was planning in installing some down pipes - but they did not fit - however the supplier is adamant - but the vender says no..
I wanted to get an base line - so I have uploaded an config file I did - and compared an new verision and since the car has done a few more miles - seems to lossen it up.
I imported the config files - into Virtual Dyno with surprising results.
Some variables used
Finial Drive 3.7
Driver 120KG
Tyre Hight 25.03
Car Weight 1500KG (half an tank and boot full)
Some log files enclosed, can be found below
http://www.n54tech.com/forums/attachment.php?attachmentid=45489&d=1457045152
I wanted to get an base line - so I have uploaded an config file I did - and compared an new verision and since the car has done a few more miles - seems to lossen it up.
I imported the config files - into Virtual Dyno with surprising results.
Some variables used
Finial Drive 3.7
Driver 120KG
Tyre Hight 25.03
Car Weight 1500KG (half an tank and boot full)
Some log files enclosed, can be found below
http://www.n54tech.com/forums/attachment.php?attachmentid=45489&d=1457045152
Met a lad on the weekend with a 2.0i who had this done. Was very quick!
http://www.celtictuning.co.uk/component/ctvc/bmw/z4-e89-2009/petrol/20i-181-bhp-2011/stage-3#t3-content
http://www.celtictuning.co.uk/component/ctvc/bmw/z4-e89-2009/petrol/20i-181-bhp-2011/stage-3#t3-content
From doing no wind-tunnel cycling aerodynamic extrapolation until you can get reliable conditions, aka a velodrome, it's almost impossible to back-work out power from speed/acceleration on a per-run basis (typically you'll need rough condition data and then do 7 or 8 runs). Hence I have very little confidence in virtual dyno software.Twin Turbo said:Well was planning in installing some down pipes - but they did not fit - however the supplier is adamant - but the vender says no..
I wanted to get an base line - so I have uploaded an config file I did - and compared an new verision and since the car has done a few more miles - seems to lossen it up.
I imported the config files - into Virtual Dyno with surprising results.
Some variables used
Finial Drive 3.7
Driver 120KG
Tyre Hight 25.03
Car Weight 1500KG (half an tank and boot full)
Some log files enclosed, can be found below
http://www.n54tech.com/forums/attachment.php?attachmentid=45489&d=1457045152
Twin Turbo
Active member
Thanks for your input,