Z4 E85 N52B25 performance upgrade

Steve84N · Post by **Steve84N** » Thu Oct 05, 2017 12:28 pm

I'm confused, the 2.5l N52 in the e89 makes about 201bhp so I can understand getting to that from 177bhp but another 55bhp from a software tune seems incredible for an NA engine?

Smartbear · Post by **Smartbear** » Thu Oct 05, 2017 12:36 pm

Steve84N wrote: ↑Thu Oct 05, 2017 12:28 pm I'm confused, the 2.5l N52 in the e89 makes about 201bhp so I can understand getting to that from 177bhp but another 55bhp from a software tune seems incredible for an NA engine?

I don’t think it’s 2.5litres, in the states they call the soft tuned 3litre a 2.5 (confusing eh?)
I think all that’s happened is the OP has had his restricted 3litre mapped to its natural output.
The version they get in the states has a single stage disa as opposed to our 3stage version. It’s hardware & software changes to get the missing mumbo back

Rob

Steve84N · Post by **Steve84N** » Thu Oct 05, 2017 12:40 pm

Surely that would still be the N52B30 though?

Smartbear · Post by **Smartbear** » Thu Oct 05, 2017 12:43 pm

Steve84N wrote: ↑Thu Oct 05, 2017 12:40 pm Surely that would still be the N52B30 though?

I think my interpretation is right, the 2.5litre Car isn’t going to produce 255 ponies, it’s got to be a 3litre.
Rob

Scarp · Post by **Scarp** » Thu Oct 05, 2017 12:46 pm

its a normal 2,5 liter

but the N52 engine is the same as in E89 the M54 is different.

And there is no supercharger for the N52B25 only for the N52B30

I was thinking of swaping the 3,0 and making it custom aswell with a big supercharger

I never wrote it only soft there is a race exhaust custom made a race intake etc

in europe the N52B25 in Z4E85 has 130kw (mine) and the N52B25 in E89 Z4 has I think 160 kw

Steve84N · Post by **Steve84N** » Thu Oct 05, 2017 12:49 pm

Smartbear wrote: ↑Thu Oct 05, 2017 12:43 pm the 2.5litre Car isn’t going to produce 255 ponies, it’s got to be a 3litre.
Rob

My thoughts too but apparently it's a 2.5.

Scarp wrote: ↑Thu Oct 05, 2017 12:46 pm its a normal 2,5 liter but the N52 engine is the same as in E89 the M54 is different.

And there is no supercharger for the N52B25 only for the N52B30 I was thinking of swaping the 3,0 and making it custom aswell with a big supercharger

We know the M54 is different but the 2.5 in the e89 doesn't make 255bhp, the 3.0 does...

StanM · Post by **StanM** » Thu Oct 05, 2017 12:50 pm

I am definitely interested to know more how did you get to 255 HP as I've got the same engine in my E89

Scarp · Post by **Scarp** » Thu Oct 05, 2017 12:52 pm

I added info to the post I never said its a stock N52B25 engine

when I put the race exhaust intake etc the brake showed I think 205 HP thats 25 HP more then stock

Joycey · Post by **Joycey** » Thu Oct 05, 2017 12:54 pm

Scarp wrote: ↑Thu Oct 05, 2017 12:46 pm its a normal 2,5 liter but the N52 engine is the same as in E89 the M54 is different.

And there is no supercharger for the N52B25 only for the N52B30 I was thinking of swaping the 3,0 and making it custom aswell with a big supercharger

I never wrote it only soft there is a race exhaust custom made a race intake etc in europe the N52B25 in Z4E85 has 130kw (mine) and the N52B25 in E89 Z4 has I think 160 kw

That print out I showed is a supercharged N52B25 engine. ESS supplied the charger and kit. It's in an 2011 E89.

Smartbear · Post by **Smartbear** » Thu Oct 05, 2017 12:54 pm

StanM wrote: ↑Thu Oct 05, 2017 12:50 pm I am definitely interested to know more how did you get to 255 HP as I've got the same engine in my E89

Sadly you’re not going to get 50bhp from an exhaust & intake change, I think the Dyno must have been fed magic mushrooms

Rob

Joycey · Post by **Joycey** » Thu Oct 05, 2017 1:01 pm

Smartbear wrote: ↑Thu Oct 05, 2017 12:54 pm
StanM wrote: ↑Thu Oct 05, 2017 12:50 pm I am definitely interested to know more how did you get to 255 HP as I've got the same engine in my E89
Sadly you’re not going to get 50bhp from an exhaust & intake change, I think the Dyno must have been fed magic mushrooms
Rob

A big thing in the states they love is buying our N52 manifolds, We have two disa's giving the higher bhp figures. They don't have them over there I'm lead to believe.

Scarp · Post by **Scarp** » Thu Oct 05, 2017 1:04 pm

Big problems with parts for 2,5liter I had them made custom for my engine

only thing I bough was eisenmann duplex

Smartbear · Post by **Smartbear** » Thu Oct 05, 2017 1:06 pm

Joycey wrote: ↑Thu Oct 05, 2017 1:01 pm
Smartbear wrote: ↑Thu Oct 05, 2017 12:54 pm
StanM wrote: ↑Thu Oct 05, 2017 12:50 pm I am definitely interested to know more how did you get to 255 HP as I've got the same engine in my E89
Sadly you’re not going to get 50bhp from an exhaust & intake change, I think the Dyno must have been fed magic mushrooms
Rob
A big thing in the states they love is buying our N52 manifolds, We have two disa's giving the higher bhp figures. They don't have them over there I'm lead to believe.

Even if it had ten disa’s it wouldn’t produce 255horses, we haven’t seen the Dyno print out yet?
Rob

Scarp · Post by **Scarp** » Thu Oct 05, 2017 1:10 pm

I am at work you can find it on my FB page last years dyno print out

when I come home I can post it here . Either you believe it or not it has the power but the original question is how to gain more

Joycey · Post by **Joycey** » Thu Oct 05, 2017 1:17 pm

Smartbear wrote: ↑Thu Oct 05, 2017 1:06 pm
Joycey wrote: ↑Thu Oct 05, 2017 1:01 pm
Smartbear wrote: ↑Thu Oct 05, 2017 12:54 pm

Sadly you’re not going to get 50bhp from an exhaust & intake change, I think the Dyno must have been fed magic mushrooms
Rob
A big thing in the states they love is buying our N52 manifolds, We have two disa's giving the higher bhp figures. They don't have them over there I'm lead to believe.

Even if it had ten disa’s it wouldn’t produce 255horses, we haven’t seen the Dyno print out yet?
Rob

The page before I posted the dyno print out.

I'll have to find the link of Zpost about the way the disa's work together with the valvtronic system to get all the extra.

Z4-forum.com

Z4-forum.com