125 tuning

[saurabh_turingMS]

The information I have is the same as what evolve have publicly release on this thread
http://www.1addicts.com/forums/showthread.php?t=778456

Evolve don't usually make bold HP gain claims, as they tend to focus more on R&D and maintaining drivability. Local customers with N54, Mini, E46M3, E92M3, E60M5, and X530D tunes will attest to this.

I believe the reason the gain claims are seemingly high for NA, is because most of the x25i engines are detuned versions of x30i. Hence, there is a lot more potential for gains than would normally be the case for a NA engine.

To Stu's point - I haven't seen local dyno results as yet, and am keen to see what gains we achieve locally. I can only go by the information I've received. Of course, EvolveR tunes also have a satisfaction guarantee and offer a full refund.

I need a volunteer in Sydney with a 125i for before/after dyno.

[Drawn05]

Originally Posted by saurabh_turingMS

The information I have is the same as what evolve have publicly release on this thread
http://www.1addicts.com/forums/showthread.php?t=778456

Evolve don't usually make bold HP gain claims, as they tend to focus more on R&D and maintaining drivability. Local customers with N54, Mini, E46M3, E92M3, E60M5, and X530D tunes will attest to this.

I believe the reason the gain claims are seemingly high for NA, is because most of the x25i engines are detuned versions of x30i. Hence, there is a lot more potential for gains than would normally be the case for a NA engine.

To Stu's point - I haven't seen local dyno results as yet, and am keen to see what gains we achieve locally. I can only go by the information I've received. Of course, EvolveR tunes also have a satisfaction guarantee and offer a full refund.

I need a volunteer in Sydney with a 125i for before/after dyno.

I would be certain that the evolve tune would make more than my car on a back to back dyno.

My digitec tune is fairly conservative so I am sure there could be another 5rwkw over my results.

Another thing to be aware of is that pre 09/09 125i's have EURO4 cats whereas post 09/09 have ULEV2 (which mine is), the latter being more restrictive to achieve the lower emissions.

[Jeef Beef]

Originally Posted by Drawn05

I would be certain that the evolve tune would make more than my car on a back to back dyno.

My digitec tune is fairly conservative so I am sure there could be another 5rwkw over my results.

Another thing to be aware of is that pre 09/09 125i's have EURO4 cats whereas post 09/09 have ULEV2 (which mine is), the latter being more restrictive to achieve the lower emissions.

Just go catless

[Bmpete]

hi all. thanks heaps for your feedback/info. I will be particularly interested to see Ronnie's pre/post dyno. Hopefully Ronnie u can post them on this thread

[Jon.]

I'm planning to get the Evolve tune soon as well. The high performance gains I believe are because the 125i is factory detuned. It's engine is exactly the same as the 130i, yet the 130i is I think around 30kW faster. So this tune isn't really squeezing the last bits of power out of the engine, it's actually bringing out the capped power of the car. Hence the very good power gains.

[dr.bmw]

best place in Melb to try this? cheers!

[Jeef Beef]

Originally Posted by Jon.

I'm planning to get the Evolve tune soon as well. The high performance gains I believe are because the 125i is factory detuned. It's engine is exactly the same as the 130i, yet the 130i is I think around 30kW faster. So this tune isn't really squeezing the last bits of power out of the engine, it's actually bringing out the capped power of the car. Hence the very good power gains.

Everyone says that, but someone is still yet to post a pre and post dyno that demonstrates that gain.

Theoretically it should be as easy as you say. The 125i engine is a detuned N52B30. But no OP has delivered.

[Stuart@BMRAutowerkes]

Originally Posted by Jeef Beef

Just go catless

N52 cats are pretty much on the manifold... maybe a bigger manifold at the same time? hmm brb.

[Jeef Beef]

Originally Posted by Stuart@BMRAutowerkes

N52 cats are pretty much on the manifold... maybe a bigger manifold at the same time? hmm brb.

two birds with one stone etc.

[chrisN]

anybody volunteered yet?

[Stuart@BMRAutowerkes]

New stainless steel catless manifold would be ~$800 supplied if anyone wants to demo one.

[Drawn05]

Originally Posted by Stuart@BMRAutowerkes

New stainless steel catless manifold would be ~$800 supplied if anyone wants to demo one.

What stainless steel manifolds might these be? Are they like ebay headers?

[mikesonfirst]

Originally Posted by BM125

Well I've sent through a pm about pricing and power gains.
If it seems reasonable i guess ill be buying this tune .
My car just feels slow ATM, and I have another 7 months before I'm on my opens

My previous cars, were a WRX and a Cooper S and the stock 125 did feel a little slow in comparison.. maybe just lacking a bit of punch. The Evolve tune does give it that so overall I'm very happy. Definitely wouldn't go back to stock.

No dyno yet but one day I'll get around to it.

Cheers, Graham

[flinchy]

Originally Posted by Stuart@BMRAutowerkes

New stainless steel catless manifold would be ~$800 supplied if anyone wants to demo one.

You can get catless headers made for $800 ready to sell?

Considering the next cheapest was mmw who no longer makes them, at $1200ish... It would probably sell well..

[dr.bmw]

where to get the evolve tune in Melb? cheers

[Stuart@BMRAutowerkes]

Originally Posted by flinchy

You can get catless headers made for $800 ready to sell?

Considering the next cheapest was mmw who no longer makes them, at $1200ish... It would probably sell well..

Nah turns out these headers were 'LHD' anyway :/

Originally Posted by dr.bmw

where to get the evolve tune in Melb? cheers

From Saurabh direct or Andrew at Southern has done some Evolve stuff.

[oystero]

I think both evolve are different stu

[saurabh_turingMS]

Please go see Andrew at SouthernBM, I've spoken to him and can send more info & evolveR kits.

[Blauweisser]

A small question from someone who is admittedly ignorant on the subject:
I understand that part of the reason why Australia and a few other nations got the 125i detune/modification on the N52 motor instead of the North American 128i was due to the higher sulfur fuels that we use. So the question is: what risk is involved in uprating the N52 performance with respect to corrosion effects with high sulfur fuels? Are 130i's at risk?

[Drawn05]

Originally Posted by Blauweisser

A small question from someone who is admittedly ignorant on the subject:
I understand that part of the reason why Australia and a few other nations got the 125i detune/modification on the N52 motor instead of the North American 128i was due to the higher sulfur fuels that we use. So the question is: what risk is involved in uprating the N52 performance with respect to corrosion effects with high sulfur fuels? Are 130i's at risk?

The reason the US got the "128i" was because of the model designation increments i.e. when the e90 came out in the states they had the 325i and 330i, so when the 335i was announced, they upgraded the 325i to the 328i and dropped the 330i (the US only has two 1/3 series models at a time).

The N53 engine was not brought to the US or OZ due to the high sulfur content you speak of.

[Seifz]

Can anyone who has had the tune update us on their experiences?