523 vs 525

[absolutrex]

Dear all expert,

I am new and just got a 523. Reading from the limit information i have i understand the 523 and the 525 has the same base engine. Therefore I would like to find out whats the main difference between the 523 and the 525 and what can i do to upgrade the 523 close to 525.

Many thanks and lots to learn.

Cheers

 

[TheNew7]

Re: 523 vs 525

Do a search.... discussed many many many many many times....

 

[absolutrex]

Re: 523 vs 525

I am so sorry, maybe my question is not specific enough. I am on a e60 523 with SMG and the search has not been able to tell me the main engine parts difference between 523 and 525 and what and where can i go to get or do this.

Main objective is what is needed to power up the 523 to 525 level without TC or SC.

 

[TheNew7]

Re: 523 vs 525

523 SMG? That's a first... did you buy yrs 2nd hand? Or are you even located in Singapore?

Assuming pt. 1 - Your gear shift might have been changed to the SMG (did you buy Wilson's Great White?). But the gear is still a Auto Box

Assuming pt. 2 - WOW, 523 with SMG, that's a first....

Going back to your question on 23 vs 25, there are other subtle changes in the engine that give it the boost to 218bhp vs 177bhp (pre LCI) or 218bhp vs 190bhp (LCI). In short, NO..

 

[absolutrex]

Re: 523 vs 525

wow, thanks Mr know it all.

Where if this is not a place for newbie to ask question, make mistake and learn then why create a forum.

My question is still no answer. subtle change is ? ECU i know is one but the mechancial diff is, Cam ? bigger valve? compression ratio?

no need to raise issue of why not buying 525 in the first place, what done is done just seeking advise if there are possiblity to tune up the detune engine.

Thanks

 

[Oilman]

Re: 523 vs 525

I think one missing part is called EQ... not sure if money can buy that though

Why don't you come down to the monthly meetup this Sunday and have a (friendly) chat with the E60 owners?

 

[davidcheok]

Re: 523 vs 525

Dear all expert,

I am new and just got a 523. Reading from the limit information i have i understand the 523 and the 525 has the same base engine. Therefore I would like to find out whats the main difference between the 523 and the 525 and what can i do to upgrade the 523 close to 525.

Many thanks and lots to learn.

Cheers

Are u talking about the older 525 vs the new 523? The new 525 has a 3l engine and isn't the same as the new 523. From what I read, the 525 is a detuned 530 engine and the 523 is a refined 2.5l engine. I wouldn't really bother about trying to tune and engine to match the next level stock engine but if I really wanted power, I'd tune my engine with proper intakes, exhausts and maybe cams with the right ecu mapping so it exceeds the next level stock

 

[davidtch]

Re: 523 vs 525

Are u talking about the older 525 vs the new 523? The new 525 has a 3l engine and isn't the same as the new 523. From what I read, the 525 is a detuned 530 engine and the 523 is a refined 2.5l engine. I wouldn't really bother about trying to tune and engine to match the next level stock engine but if I really wanted power, I'd tune my engine with proper intakes, exhausts and maybe cams with the right ecu mapping so it exceeds the next level stock

There is no 525 wif 3L engine outside Europe. These engines are DI. One of the difference btw 523 & 525 is DISA. It is not just the intake.

 

[davidcheok]

Re: 523 vs 525

There is no 525 wif 3L engine outside Europe. These engines are DI. One of the difference btw 523 & 525 is DISA. It is not just the intake.

The 525i here is 3L. Isnt SG the same?

 

[davidtch]

Re: 523 vs 525

The 525i here is 3L. Isnt SG the same?

Is it from the dealer?

Based on my understanding, direct injection engine is not sold outside Europe. Even Japan don't get it. So, in Asia, 525 is 2.5L.

 

[JLMC]

Re: 523 vs 525

Is it from the dealer?

Based on my understanding, direct injection engine is not sold outside Europe. Even Japan don't get it. So, in Asia, 525 is 2.5L.

my answers to some questions hopefully can enlighten all members.
I had test drove 523 pre LCI (they r 177bhp - 2004~2006) and also LCI models (which are 190bhp - 2007~2008) and now I owned a 525 (2009 model)
523 are 2.5L, same engine capacity as 525, period (as far as Sin registered cars are concern)
Mine has 218bhp, but I know of 525 (2006 models) has 195bhp.
530 sold here in Sin are 3L, period.

for those who wish to "boost" some horses from their current ride 523, there r a few options
a) upgrade yr ECU soft/w
b) change yr intake or even headers
c) change spark plugs to premium type
d) change oil to premium ones, like some say ...
e) change exhaust like some say...
or even change tires to slimmer ones or smaller rims :yikess:

for me, i did some changes to my ride, not sure engine has been boosted, but after paying so much, i thin some "ego" was boosted (just to make myself happy)
isnt thats the point of so call upgrade? :woowooo:
like they say "hen lui liao, buay swee, boon theok ai gong swee!!"
:laughlik:

 

[davidtch]

Re: 523 vs 525

As i said in my earlier post, 1 of the key difference is DISA. 523 & 525 has different part no. I m not sure whether anybody has done this mod b4. ECU also need to be tuned to timing of 525 DISA.

 

[davidcheok]

Re: 523 vs 525

Yes. From only authorised dealer. Guess our options different.

 

[desertfox65]

Re: 523 vs 525

There are 2 "DISA" in 525 and only one in 523. THE intake manifold partnumber is identical and so is the engine itself. To go "525" from "523" ECU software must recognize the car as a "525" rather than "523" or the the 2nd disa mapping will not be done. You would need to load the 525 ECU s/w which would not work straight off. unless some third party can override the vehicle recognition system this option is not workable.
Unfortunately this is the only difference between a 2.5L 525 and 523 but BMW authorized s/w programming will not allow you to reporgram.

 

[davidtch]

Re: 523 vs 525

desertfox65, u r the man. Finally, we have some1 who could explain DISA.

 

[Jason8822]

Re: 523 vs 525

singapore's 2.5L E60 525 have High Pressure Fuel Injectors which 523 (PML no longer selling) does not have.

correct me if i'm wrong

 

[desertfox65]

Re: 523 vs 525

That is not true. . THE N53 engines support direct injection which was never sold in singapore. THe injectors on the 523 and 525 are identical you can verify on real oem.

 

[Jason8822]

Re: 523 vs 525

Oh, is it, then the DISA thing really create such a power gap for the 525 over our 523.
hmmm.... gotta find out more about it.

The Direct Injection in N53 is different from the High Pressure Injection in the N54 right?

I heard from a workshop near havelock road telling me there's different hardware between both the N52B25 523 & 525 and the High Pressure Injector is only one of them.