Remapping on 23i

[Gwest44]

From previous posts I'd read I was under the impression there were limited gains to be made from remapping the N52 2.5L unit then I saw this advert for a 23i that's for sale - is it just BS or is there actuql benefits to be had if you use a competent remapping company?

 

[Smartbear]

That’s going to be louder than a standard 3.0i but i doubt it’s going to be faster than one.
Rob

 

[JamesClements]

Unlikely to outrun a 30i I would think - he might have gained 10bhp at most

 

[Gwest44]

Thanks both that pretty much confirms what I thought - a pointless exercise an simply a case of enjoying the 23i for what it is i.e. not a 30i

 

[mr.tourette]

I've remapped my 23i, gains are in delivery and low end torque and driveability rather than any rwhp, it picks up a little quicker at low revs but still lacks the initial shove of my old 3.0si, its a modest improvement but noticible in the first few days of driving however it soon becomes the norm, certainly not going to outrun a 30i, its reasonable enough value for money mod at £200 but I went into it with my eyes open and was not expecting any night and day gains

 

[B21]

Best figure I've ever seen on a dyno for a 23i with lots of work was 11 bhp.. so say 212 bhp crank

30i stock should be around 255 bhp

Difficult to envisage in most people's brains how the re-mapped 23i is going to 'outrun' a 30i :tumbleweed:

 

[jenniferlouise]

I had a modest Quantum remap added to my 23i, and similar to other comments here, whilst it doesn’t transform the car, having 220hp gives a smoother pull and possibly a little more responsive, but it will quickly feel normal I guess. Considering JL is running a 300ps Mini JCW I had to fettle the Z4 a little bit! And the straight six is still a great old-skool engine IMO

 

[Ole gits rule]

Trouble is for those who test drive - how would they know what a 3.0 is like to drive

 

[mcbutler]

Its not all about BHP/Torque when you map a car.
Its also about delivery of those parameters.
My 23i was mapped by Celtic, little gain in the figures but the power delivery was changed drastically and the drive was a lot lot better.

 

[Smartbear]

Its not all about BHP/Torque when you map a car.
Its also about delivery of those parameters.
My 23i was mapped by Celtic, little gain in the figures but the power delivery was changed drastically and the drive was a lot lot better.

Did you keep the dyno results so we can see the differences? :?
Rob

 

[mcbutler]

Its not all about BHP/Torque when you map a car.
Its also about delivery of those parameters.
My 23i was mapped by Celtic, little gain in the figures but the power delivery was changed drastically and the drive was a lot lot better.

Did you keep the dyno results so we can see the differences? :?
Rob

Might have but it was around 4 1/2 years ago. More than likely passed them to the new owner with all the rest of the bits n bobs.
Will have a wee poke around but don't hold your breath

 

[mcbutler]

I had a modest Quantum remap added to my 23i, and similar to other comments here, whilst it doesn’t transform the car, having 220hp gives a smoother pull and possibly a little more responsive, but it will quickly feel normal I guess. Considering JL is running a 300ps Mini JCW I had to fettle the Z4 a little bit! And the straight six is still a great old-skool engine IMO

Did you get a dyno reading done Jennifer?

 

[tiglon]

I read that advert this morning, technically he's not lying. My 1.0 Focus will out run a McLaren something-or-other, it's been tried and tested. Obviously not in all conditions, but in the conditions in which it was tested, I out ran the McLaren. The conditions being a situation where the McLaren was being driven at 70mph....

 

[wanderer]

From my recent research if it's power gains on the 23i that you want, then these are the options:
1) remap - 16-25 bhp
2) 3 stage intake manifold with dual DISA valves (as in the 3L E89)
3) new exhaust system - a la Eissenmann, Remus, SuperSprint etc

Those last two are rather expensive compared to #1.
The most benefit though would be with #2 above.

 

[Smartbear]

From my recent research if it's power gains on the 23i that you want, then these are the options:
1) remap - 16-25 bhp
2) 3 stage intake manifold with dual DISA valves (as in the 3L E89)
3) new exhaust system - a la Eissenmann, Remus, SuperSprint etc

Those last two are rather expensive compared to #1.
The most benefit though would be with #2 above.

Looks like they have dual disa valves as standard? https://www.realoem.com/bmw/enUS/showparts?id=LM32-EUR-03-2010-E89-BMW-Z4_23i&diagId=11_3756
Rob

 

[JamesClements]

From my recent research if it's power gains on the 23i that you want, then these are the options:
1) remap - 16-25 bhp
2) 3 stage intake manifold with dual DISA valves (as in the 3L E89)
3) new exhaust system - a la Eissenmann, Remus, SuperSprint etc

Those last two are rather expensive compared to #1.
The most benefit though would be with #2 above.

I always thought the e89 23i had the 3 stage manifold and it was only the pre facelift 2.5i (iv been considering doing the swap on mine) that had the single DISA? But on paper yes the manifold swap would yield the most power

 

[Smartbear]

From my recent research if it's power gains on the 23i that you want, then these are the options:
1) remap - 16-25 bhp
2) 3 stage intake manifold with dual DISA valves (as in the 3L E89)
3) new exhaust system - a la Eissenmann, Remus, SuperSprint etc

Those last two are rather expensive compared to #1.
The most benefit though would be with #2 above.

I always thought the e89 23i had the 3 stage manifold and it was only the pre facelift 2.5i (iv been considering doing the swap on mine) that had the single DISA? But on paper yes the manifold swap would yield the most power

The 23i has got the dual disa manifold.
Rob

 

[wanderer]

From my recent research if it's power gains on the 23i that you want, then these are the options:
1) remap - 16-25 bhp
2) 3 stage intake manifold with dual DISA valves (as in the 3L E89)
3) new exhaust system - a la Eissenmann, Remus, SuperSprint etc

Those last two are rather expensive compared to #1.
The most benefit though would be with #2 above.

I always thought the e89 23i had the 3 stage manifold and it was only the pre facelift 2.5i (iv been considering doing the swap on mine) that had the single DISA? But on paper yes the manifold swap would yield the most power

The 23i has got the dual disa manifold.
Rob

Hmm, yes. It does seem that the 23i has the dual DISA system.
But there is a difference in the manifolds according to the part numbers:

23i - https://www.lllparts.co.uk/product/intake-manifold/mpn/11617559525
30i - https://www.lllparts.co.uk/product/intake-manifold/mpn/11617559523

Then there is this article which i guess is a bit confusing as it talks about the N52B25 from previous generations as well.

https://bmwtuning.co/n52-intake-manifold-upgrade-guide/

 

[Smartbear]

I always thought the e89 23i had the 3 stage manifold and it was only the pre facelift 2.5i (iv been considering doing the swap on mine) that had the single DISA? But on paper yes the manifold swap would yield the most power

The 23i has got the dual disa manifold.
Rob

Hmm, yes. It does seem that the 23i has the dual DISA system.
But there is a difference in the manifolds according to the part numbers:

23i - https://www.lllparts.co.uk/product/intake-manifold/mpn/11617559525
30i - https://www.lllparts.co.uk/product/intake-manifold/mpn/11617559523

Then there is this article which i guess is a bit confusing as it talks about the N52B25 from previous generations as well.

https://bmwtuning.co/n52-intake-manifold-upgrade-guide/

The uk 23i already has the full power manifold with twin disa, the tuning link you posted isn’t really relevant as it’s an American site & they had different models to us in the uk including a lower powered n52 with a different manifold.
Our 23i doesn’t use one of those.
Rob

 

[wanderer]

The 23i has got the dual disa manifold.
Rob

Hmm, yes. It does seem that the 23i has the dual DISA system.
But there is a difference in the manifolds according to the part numbers:

23i - https://www.lllparts.co.uk/product/intake-manifold/mpn/11617559525
30i - https://www.lllparts.co.uk/product/intake-manifold/mpn/11617559523

Then there is this article which i guess is a bit confusing as it talks about the N52B25 from previous generations as well.

https://bmwtuning.co/n52-intake-manifold-upgrade-guide/

The uk 23i already has the full power manifold with twin disa, the tuning link you posted isn’t really relevant as it’s an American site & they had different models to us in the uk including a lower powered n52 with a different manifold.
Our 23i doesn’t use one of those.
Rob

Aahhhh! Bummer!
But that saves me a couple of grand in unnecesary changes!

Thanks Rob!