Review of Digi-tec 125i tune

[Jeef Beef]

Originally Posted by flinchy

Theyre getting 170kw out of the160kw 128i... I'm guessing engine dyno? So the 125i actually makes 11kw more than the factory says? Then this tune puts it even 13kw over stock 130i.. Heck i'd be happy with close to 210kw at the crank lol

No, the 125i is tuned at 160kw, the 128i gets a different tune (among other things, no one's really ever worked out the differences).

It's just a 125i has never been DYNO PROVEN to make 130i power. I don't think your 130i will get anything out of this.

[Drawn05]

Originally Posted by Jeef Beef

No, the 125i is tuned at 160kw, the 128i gets a different tune (among other things, no one's really ever worked out the differences).

It's just a 125i has never been DYNO PROVEN to make 130i power. I don't think your 130i will get anything out of this.

I think stu dyno'd a 130i at advan a while back and it made 142rwkw. My 125i made 140rwkw last year on the same machine.

[Jeef Beef]

Originally Posted by Drawn05

I think stu dyno'd a 130i at advan a while back and it made 142rwkw. My 125i made 140rwkw last year on the same machine.

Shame that there isn't a before/after dyno to compare, but that seems pretty close. 142rwkw for a 130i seems pretty damn low though since stock 135i's all get around 190rwkw, and it's only supposed to be 30kw more at the fly.

[flinchy]

According to uk dynos the 130i makes 170-175 rwkw which would be right on the money when 125ms make 142 and 128s make near 150

[MrBlonde]

Originally Posted by flinchy

According to uk dynos the 130i makes 170-175 rwkw which would be right on the money when 125ms make 142 and 128s make near 150

What did your 130 make on the dyno?

[flinchy]

Originally Posted by MrBlonde

What did your 130 make on the dyno?

I'll let you know in about a month, got a group dyno day booked in

But with the 125's and 128's making 140-150wkw, the 130i making 140kwatw means it's not 265hp ?

Quick google found at least one making 166wkw (130i), which is still pretty low

ED: and yes i know you were being sarcastic, i don't understand why you have that attitude? :/

[flinchy]

Originally Posted by Jeef Beef

No, the 125i is tuned at 160kw, the 128i gets a different tune (among other things, no one's really ever worked out the differences).

It's just a 125i has never been DYNO PROVEN to make 130i power. I don't think your 130i will get anything out of this.

Heaps of people know the differences, disa valve disabled and such, it's not too huge apart from tune according to forum posts

The dyno graph in the op says 125i and 171kw lol

According to this, it should be (a 130i) around 208kw, up from 195, which would mean like .. 8-9 at the wheels realistically?

Ed: my mistake, ~204kw, the graph reads a bit wrong..
The site does list (from memory) 13kw for the 130i 195kw expected

I'm not saying i want to do this btw, i'm not even slightly a fan of canned tunes.

[Dackelone]

Originally Posted by flinchy

According to uk dynos the 130i makes 170-175 rwkw which would be right on the money when 125ms make 142 and 128s make near 150

The 125i and 128i have the SAME engine. They differ only in the model name. Both models have the same Hp. Only over here in Germany they rate engines in DIN PS while in the states they are rated in SAE HP.


Here is a dyno graph of a 125i with only an ecu tune. Its from Marcel from MS Tuning.de

[Drawn05]

Next Wednesday I will take the 125i to WSID and do a few runs. I will see if I can get a similar ET and trap to what Kenny got when he ran his 130i.

[MrBlonde]

Originally Posted by Drawn05

Next Wednesday I will take the 125i to WSID and do a few runs. I will see if I can get a similar ET and trap to what Kenny got when he ran his 130i.

Steve, good one, you should be able to better my times because they were done in the middle of a summer day. Running runflats?

Also take into account weight, I took my 130 over the scales (with me in it) for a raceweight of 3402 lbs (verified accurate on WSID racescales). If you can take your 125 over the scales when you do scrutineering (lane 1) and take a photo. Just ask the ANDRA official to turn the scales on.



My passes in the 130


My wife's passes in the 130 on an even hotter day

[flinchy]

Originally Posted by Dackelone

The 125i and 128i have the SAME engine. They differ only in the model name. Both models have the same Hp. Only over here in Germany they rate engines in DIN PS while in the states they are rated in SAE HP.


Here is a dyno graph of a 125i with only an ecu tune. Its from Marcel from MS Tuning.de


Attachment 720360

Then how come every result says 125i = 210hp and 128i = 230hp?

For n52b30 i mean, not the n52 sulev which is still also 230hp

Ps is slightly over hp from every spec sheet i've ver seen?

[Drawn05]

Ok, will try and get weighed as well.

Would be good if another n52 could come along.

Originally Posted by MrBlonde

Steve, good one, you should be able to better my times because they were done in the middle of a summer day. Running runflats?

Also take into account weight, I took my 130 over the scales (with me in it) for a raceweight of 3402 lbs (verified accurate on WSID racescales). If you can take your 125 over the scales when you do scrutineering (lane 1) and take a photo. Just ask the ANDRA official to turn the scales on.



My passes in the 130


My wife's passes in the 130 on an even hotter day

[Jeef Beef]

Originally Posted by flinchy

Heaps of people know the differences, disa valve disabled and such, it's not too huge apart from tune according to forum posts

The dyno graph in the op says 125i and 171kw lol

According to this, it should be (a 130i) around 208kw, up from 195, which would mean like .. 8-9 at the wheels realistically?

Ed: my mistake, ~204kw, the graph reads a bit wrong..
The site does list (from memory) 13kw for the 130i 195kw expected

I'm not saying i want to do this btw, i'm not even slightly a fan of canned tunes.

Yeh except people all say they know the differences but I've yet to see a dynoed confirmed 125i/128i making 130i power (with before/after dynos) after 'changing' all the differences. I will stand corrected if this is posted.

[flinchy]

Originally Posted by Jeef Beef

Yeh except people all say they know the differences but I've yet to see a dynoed confirmed 125i/128i making 130i power (with before/after dynos) after 'changing' all the differences. I will stand corrected if this is posted.

Check out e90post and babybmw, theres a few (one within the last couple of weeks, to get their cars to 130/330 levels or thereabouts.. Though the 3 series is more in depth with manifold swaps and all

[MrBlonde]

Originally Posted by flinchy

Check out e90post and babybmw, theres a few (one within the last couple of weeks, to get their cars to 130/330 levels or thereabouts.. Though the 3 series is more in depth with manifold swaps and all

But anyone can post something on the internet, and comparing one dyno sheet to another is almost pointless, especially once you factor in the "happy" USA dynos.

[flinchy]

Originally Posted by MrBlonde

But anyone can post something on the internet, and comparing one dyno sheet to another is almost pointless, especially once you factor in the "happy" USA dynos.

Don't mustang dynos (which seem to be the ones i see most on us forums?) read a bit under? Or is it a bit over?

The few conversions i've read show before and afters with gains - is that not reallythe only proof of success you need?

By your logic, unless you see it in person, it's not valid?

I take it you've never come to the internet seeking information then? :/

[MrBlonde]

Originally Posted by flinchy

Don't mustang dynos (which seem to be the ones i see most on us forums?) read a bit under? Or is it a bit over?

The few conversions i've read show before and afters with gains - is that not reallythe only proof of success you need?

By your logic, unless you see it in person, it's not valid?

I take it you've never come to the internet seeking information then? :/

Dynonet read highest. Mustang read a bit lower than Dynojet. Dyno Dynamics read a LOT lower than both.

You're a bit of a hard learner. You have to look for objective information on the internet. A lot of "information" is actually just marketing.

It's not a matter of seeing it in person when it comes to dyno sheets. The big black dyno never lies, which is why the trap speed from a drag strip pass with a known raceweight tells us far more than any dyno sheet can.

Step back and think a bit about what you read.

[flinchy]

Originally Posted by MrBlonde

Dynonet read highest. Mustang read a bit lower than Dynojet. Dyno Dynamics read a LOT lower than both.

You're a bit of a hard learner. You have to look for objective information on the internet. A lot of "information" is actually just marketing.

It's not a matter of seeing it in person when it comes to dyno sheets. The big black dyno never lies, which is why the trap speed from a drag strip pass with a known raceweight tells us far more than any dyno sheet can.

Step back and think a bit about what you read.

But strip times still have huge variance no?.. Driver skill, temperature, tire choice (has to be stock, same pressure?), height above sea level (same location ideally?), octane availability (again same track needed to make sure it's the same coun try for fuels).. So really only the same car, same place, same conditions, with the only difference being tune, would be the perfect solution?

But even the same driver in all identical conditions can have a huge variation in times, several tenths?

I know that track/strip times+data are the best ideal real world proof of gains, but there can be almost as much variance as between dynos?

I don't even entirely understand how a dyno can read incorrectly/differently? Wheels spin, dyno spins, reads how much power is coming from the wheels via how fast they spin versus the load on the dyno itself? I'm genuinely honestly wanting to know how that can be so totally screwed up?

Are any of the three what is realistically being put to the ground? So confusing.

I'm very suspiscious not only of things i read on the internet, but things i hear in person.

[MrBlonde]

Originally Posted by flinchy

But strip times still have huge variance no?.. Driver skill, temperature, tire choice (has to be stock, same pressure?), height above sea level (same location ideally?), octane availability (again same track needed to make sure it's the same coun try for fuels).. So really only the same car, same place, same conditions, with the only difference being tune, would be the perfect solution?

But even the same driver in all identical conditions can have a huge variation in times, several tenths?

I know that track/strip times+data are the best ideal real world proof of gains, but there can be almost as much variance as between dynos?

I don't even entirely understand how a dyno can read incorrectly/differently? Wheels spin, dyno spins, reads how much power is coming from the wheels via how fast they spin versus the load on the dyno itself? I'm genuinely honestly wanting to know how that can be so totally screwed up?

Are any of the three what is realistically being put to the ground? So confusing.

I'm very suspiscious not only of things i read on the internet, but things i hear in person.

You are dead right, that's why I said trap speed not ET.

Google on how a dyno machine can read differently and how they can so easily be rigged. It's actually very difficult to get a dyno machine to read consistently from day to day.

[flinchy]

Ah so theres two different dyno types, as well as dodgy software settings? Makes a bit more sense then

Would how you launch the car still have an effect on speeds though? Or does it just have a significantly lower variance to ET's?

[Alpine*]

Flinchy, that's why I went on about the claim of ~50kws elsewhere, as i said the delta on dynos is very relevant. Same operator, same day, before and after mod is the best way to do it. If dyno type a reads low compared to dyno b or visa versa who cares, deltas highlight the improvement relative to the before configuration.

Then in saying that all things must be equal, or as close as possible or it means sh1t, I mean with a 1M, was the M button pressed and did the car react the same? I mean I would be shattered if, with an end to end Akra AND a tune, it only offered 20kws atw as you suggest.

[Drawn05]

Weight with driver: 1537kg

Run 1 - ET 14.616 @ 96.01mph 60' 2.244
Run 2 - ET 14.695 @ 96.02mph 60' 2.269
Run 3 - ET 15.129 @ 95.34mph 60' 2.548
Run 4 - ET 14.788 @ 96.40mph 60' 2.372