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Z4 E85 N52B25 performance upgrade
- Scarp
- Newbie
- Posts: 26
- Joined: Thu Oct 05, 2017 7:37 am
- Location: Slovakia
- Contact:
Z4 E85 N52B25 performance upgrade
Hi ,
Some of you may know me from the Z4 forum on facebook.
I own a custom Z4 E85 facelift N52B25 I know the performance is already great from stock but are there any possibilities of a supercharger ?
I communicated with ESS and they have a kit but dont have a soft and after 2 years probably getting nowhere .
Stock power is 177 HP now I have 255 HP since the engine basis is exactly the same asN52B25 in E89. I think except shrink camshaft ( which I dont want to use ) there are no more possibilities to upgrade the engine There are no injectors the engine is too "weak" for a turbo the intake is great exhaust is completely custom made and the dyno tuning is made for the max limit .
I looked at the 3liter biturbo engine and there is a good chance that it may fit but there are a million problems connected with it and I think that wont work or if it does it will cost a price of an M .
I dont want to sell it the money and time invested is far beyond the level where selling would be a good idea
Any suggestions ?
Here a photo a bit older but it looks close to where it is now
https://imgur.com/0YyYb7C
Some of you may know me from the Z4 forum on facebook.
I own a custom Z4 E85 facelift N52B25 I know the performance is already great from stock but are there any possibilities of a supercharger ?
I communicated with ESS and they have a kit but dont have a soft and after 2 years probably getting nowhere .
Stock power is 177 HP now I have 255 HP since the engine basis is exactly the same asN52B25 in E89. I think except shrink camshaft ( which I dont want to use ) there are no more possibilities to upgrade the engine There are no injectors the engine is too "weak" for a turbo the intake is great exhaust is completely custom made and the dyno tuning is made for the max limit .
I looked at the 3liter biturbo engine and there is a good chance that it may fit but there are a million problems connected with it and I think that wont work or if it does it will cost a price of an M .
I dont want to sell it the money and time invested is far beyond the level where selling would be a good idea
Any suggestions ?
Here a photo a bit older but it looks close to where it is now
https://imgur.com/0YyYb7C
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
Z4 E85 N52B25 performance upgrade
Hi, how did you get your 2.5 up to 255bhp? Have you got a Dyno print out you can post?
Rob
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
- Ducklakeview
- Lifer
- Posts: 6362
- Joined: Tue Mar 22, 2016 4:08 pm
- Location: Merseyside
- Steve84N
- Senior Member
- Posts: 1828
- Joined: Tue Jul 21, 2015 1:00 pm
Z4 E85 N52B25 performance upgrade
Pretty sure he doesn't have 255hp and something has got lost in translation...
C63 AMG Estate 6208cc
- Scarp
- Newbie
- Posts: 26
- Joined: Thu Oct 05, 2017 7:37 am
- Location: Slovakia
- Contact:
Z4 E85 N52B25 performance upgrade
Nothing got lost in translation as I wrote the engine is the same as in E89 the only difference is intake soft and manifold if you channge the exhaust intake and let it get tunned on a dyno you have 160kw as the E89 . Heres the dyno run not everything is on video - max power measured on 4th gear 254,8 PS / 187,4 Kw 273,6 Nm . You have the diagram from the dyno on my facebook fan page facebbok.com/bmWhiteZ4
Z4 E85 2006 2,5i 255 HP custom built
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
-
- Lifer
- Posts: 4621
- Joined: Fri Dec 31, 2010 9:38 pm
Z4 E85 N52B25 performance upgrade
255 ps isn't the same as BHP - 255 PS is about 250 BHP.Scarp wrote: ↑Thu Oct 05, 2017 11:13 am Nothing got lost in translation as I wrote the engine is the same as in E89 the only difference is intake soft and manifold if you channge the exhaust intake and let it get tunned on a dyno you have 160kw as the E89 . Heres the dyno run not everything is on video - max power measured on 4th gear 254,8 PS / 187,4 Kw 273,6 Nm . You have the diagram from the dyno on my facebook fan page facebbok.com/bmWhiteZ4
18 Z4s owned to date.
Current: 2.5i Titan silver
Daily driver: 480bhp M140i Shadow edition.
Current: 2.5i Titan silver
Daily driver: 480bhp M140i Shadow edition.
- Scarp
- Newbie
- Posts: 26
- Joined: Thu Oct 05, 2017 7:37 am
- Location: Slovakia
- Contact:
Z4 E85 N52B25 performance upgrade
sure and WHP even less
Z4 E85 2006 2,5i 255 HP custom built
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
- Ducklakeview
- Lifer
- Posts: 6362
- Joined: Tue Mar 22, 2016 4:08 pm
- Location: Merseyside
- Ducklakeview
- Lifer
- Posts: 6362
- Joined: Tue Mar 22, 2016 4:08 pm
- Location: Merseyside
Z4 E85 N52B25 performance upgrade
With a 7k redline too..
251bhp from a NA 2.5ltr ain't half bad!
Mike
251bhp from a NA 2.5ltr ain't half bad!
Mike
- Scarp
- Newbie
- Posts: 26
- Joined: Thu Oct 05, 2017 7:37 am
- Location: Slovakia
- Contact:
Z4 E85 N52B25 performance upgrade
thanks for putting the videos here originally the limiter was about 6500 now 7010 LSD from quaife 365mm 8 piston front and 365mm 6 piston rear brakes . BC racing suspension etc a great car I must say but with 100 HP more it would be perfect for me
Z4 E85 2006 2,5i 255 HP custom built
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
- Ducklakeview
- Lifer
- Posts: 6362
- Joined: Tue Mar 22, 2016 4:08 pm
- Location: Merseyside
Z4 E85 N52B25 performance upgrade
Quaife ATB? I have one on mine and LOVE it!!
Mike
- Joycey
- Member
- Posts: 683
- Joined: Wed Feb 24, 2016 4:28 pm
- Location: Basingstoke
Z4 E85 N52B25 performance upgrade
A guy I've been chatting with has charged his N52B25 and got great results. See his dyno.
- Scarp
- Newbie
- Posts: 26
- Joined: Thu Oct 05, 2017 7:37 am
- Location: Slovakia
- Contact:
Z4 E85 N52B25 performance upgrade
maybe he changed the camshaft thats the additional 25-30 HP can you pleas ask him ?
Z4 E85 2006 2,5i 255 HP custom built
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
facebook: facebook.com/bmWhiteZ4
Youtube : https://www.youtube.com/channel/UC54mhx ... subscriber
- Ducklakeview
- Lifer
- Posts: 6362
- Joined: Tue Mar 22, 2016 4:08 pm
- Location: Merseyside
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
Z4 E85 N52B25 performance upgrade
So is yours the 3litre but just known in the states as the 2.5? That would explain a lot as your 3litre cars are restricted down to 170bhp whereas ours are 258/ 265 according to what model zed they’re fitted to
Rob
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold