Viezu Tuning: 125i

[Taymaishu]

Originally Posted by dr.bmw

My 125i is a manual with perf exhaust and injen intake. Happy to submit for experimentation and comparison purposes

Might be good actually. Control sample with PE

[flinchy]

Originally Posted by Taymaishu

Yep spot on.

E92 325i : 2.5L, 160kw fly
E82 125i : 3.0L, 160kw fly

To be honest I'm probably looking forward to the torque boost more. 28Nm is a great jump, and I'm hoping the delivery will be earlier.

That being said, I'm confident we won't reach 130i figures until the manifold gets switched up. If ad when that is done, we should be able to meet and possibly exceed the hatch's stats.

Meeting the 130 should be a cakewalk, same with exceeding. If anyone knows a good dyno place that would be open tomorrow so i can give you a goal to reach, lemme know!

Also with 160flywheel 128-129 sounds like the dyno is very conservative

Originally Posted by bmroxm5

Nope, Aus spec 125i has a 3L engine, the same N52B30 as found in the 130i.

The E92 325i has a 2.5L engine, an N52B25.
Both are rated at 160kw. 125i is rated at 270nm vs the 325i with 250nm.

Wtf, the numbers have usually always corresponded with engine size, damn confusing lol.

Tune it, get 270-280hp at the fly easy no other mods, recieve extremely fun bacon?

[Taymaishu]

Originally Posted by flinchy

Meeting the 130 should be a cakewalk, same with exceeding. If anyone knows a good dyno place that would be open tomorrow so i can give you a goal to reach, lemme know!

Also with 160flywheel 128-129 sounds like the dyno is very conservative

Wtf, the numbers have usually always corresponded with engine size, damn confusing lol.

Tune it, get 270-280hp at the fly easy no other mods, recieve extremely fun bacon?

Love this post!

If you want, Advan is open tomorrow until Midday. We're doing our tests on their dyno (Dyno Dynamics) so a 130i baseline would be good!

[dr.bmw]

mmm blah blah no proof

Tay - i'll take my car to advan when i have an opportunity. Probably not for at least 2 weeks tho!

[Drawn05]

This is one of the only 130i dyno dynamics plots I have seen. Its from the Brisbane dyno day.



The other results seem to be very similar to advan results i.e. stock 135i n54 = 187rwkw.

[Taymaishu]

Originally Posted by Drawn05

This is one of the only 130i dyno dynamics plots I have seen. Its from the Brisbane dyno day.

Attachment 655478

The other results seem to be very similar to advan results i.e. stock 135i n54 = 187rwkw.

Thanks Steve!

Do you know if it was AT or MT?

[flinchy]

Originally Posted by Taymaishu

Love this post!

If you want, Advan is open tomorrow until Midday. We're doing our tests on their dyno (Dyno Dynamics) so a 130i baseline would be good!

brisbane, sadly.

Originally Posted by Drawn05

This is one of the only 130i dyno dynamics plots I have seen. Its from the Brisbane dyno day.

Attachment 655478

The other results seem to be very similar to advan results i.e. stock 135i n54 = 187rwkw.

147rwkw means over 25% power loss, the car either is making lower than stock power (195-197kw at the fly)(running 91 octane, or 91 octane e10 even?), or the dyno is VERY conservative, or a combination of the two.
i mean... 226kw stock for the 135i would put it at 82% efficiency, which is still pretty bad.. google shows me many 1addicts threads saying it's more realistic to have 190-200wkw in a 135, which puts it at a much more realistic 85-90% efficiency.

dyno dynamics read low
dynojet read high.. so i'd guess somewhere in the middle.

[Drawn05]

Well, here is a "tuned" 130i plot:

[Taymaishu]

Thanks Steve, this is very useful.

Do you know what tune was done on that 130?

Also, I'm assuming you don't have stock dyno figures from your car?

[flinchy]

2.3kw gain from a tune sounds really *REALLY* low, especially the hundreds of available dyno graphs all over the internet showing much larger gains?

ED: i mean, there's a thread on these very forums with this:


11. 140 rwkw Steve (Drawn05?) 125 AT [Tune]
125 AUTO so 160kw with more power loss than manual, with an unknown tune, gets 10kw less than something which apparently has almost 40kw more at the fly?

i'll be super disappointed with 145-150kw atw, it'd almost seem like they are flat out lying about the 195kw at the fly figure, 25+% drivetrain loss is almost unheard of.

[dr.bmw]

any proven gains from a tune would be nice

so far there has only been promises

flinchy you either have taken your car to the dyno numerous times and tuned it with a variety of tunes available from Europe ... or talking out of your proverbial...

cheers

[flinchy]

Originally Posted by dr.bmw

any proven gains from a tune would be nice

so far there has only been promises

flinchy you either have taken your car to the dyno numerous times and tuned it with a variety of tunes available from Europe ... or talking out of your proverbial...

cheers

look at the numbers and do the math.. this is a 25% loss from engine to the wheels, there hasn't been a decent modern car with that bad an efficiency.. well.. ever. I haven't dynoed it yet, no one has yet been able to tell me (in a couple of months of asking) a decent weekend dyno service. i will as soon as i know one lol.

even 20% in an evo/sti is *BAD* and that's AWD.

if the 130i is only getting 150kw to the wheels, then realistically, theoretically it's only making ~175kw at the crank.

[dr.bmw]

Originally Posted by flinchy

realistically, theoretically...

huh?

[flinchy]

Originally Posted by dr.bmw

huh?

Definition for realistically:
Web definitions:
in a realistic manner; "let's look at the situation realistically"

Definition for theoretically:
Web definitions:
in theory; according to the assumed facts; "on paper the candidate seems promising".

theoretically being: the only way we can tell is if someone actually decides to pull out an n52b30 and actually dyno it straight at the fllywheel... and the fact that 135i's magically have many percent less loss than the 130i (unless the 135 is understated.. apparently the 1M is understated by 40-50hp at the fly)

[Stuart@BMRAutowerkes]

Here is the plan:

1. We will dyno Tay's car on the day of the flash (again)
2. We will load the flash on Tay's car and dyno it.
3. I have arranged a stock 130i to be present on the day and we will dyno that.

Both cars are AT.

No point talking about peak figures, we will be comparing the baseline and the after effect.

The 125i already has the 3 stage intake manifold.

I'm not selling anything yet as I'm only going to sell something I believe in, thus I am doing this testing to ensure that BMR Autowerkes can come to the table with a tune that gives gains for those 125i owners wanting more from their cars.

Originally Posted by flinchy

look at the numbers and do the math.. this is a 25% loss from engine to the wheels, there hasn't been a decent modern car with that bad an efficiency.. well.. ever. I haven't dynoed it yet, no one has yet been able to tell me (in a couple of months of asking) a decent weekend dyno service. i will as soon as i know one lol.

even 20% in an evo/sti is *BAD* and that's AWD.

if the 130i is only getting 150kw to the wheels, then realistically, theoretically it's only making ~175kw at the crank.

My 325i was rated 160kw at the wheels.

It did 120kw on the Advan dyno.

Spot on 25% drivetrain loss (and the car was MT)

Could've been a hot day or something, but regardless we'll be looking at the baseline and the after figure, no point splitting hairs about which dyno will read higher or lower.

[BBK]

It's not about what the car does on the dyn tuned, its about what the car does COMPARED to it's base line run.

Power train loss is irrelevant, what matters is the difference between stock, and tuned.

[Kiwi Peter]

Originally Posted by BBK

It's not about what the car does on the dyn tuned, its about what the car does COMPARED to it's base line run.

Power train loss is irrelevant, what matters is the difference between stock, and tuned.

HERE HERE

[Looks]

Originally Posted by SparklingRed

Subscribed!

+1

Very interested to see how this develops!

PS - some great snaps on the BMR fb page!

[Taymaishu]

Originally Posted by BBK

It's not about what the car does on the dyn tuned, its about what the car does COMPARED to it's base line run.

Power train loss is irrelevant, what matters is the difference between stock, and tuned.

Spot. F-ing. On.

I mentioned the 325/125 comparison just because I thought it was interesting that an AT got more than an MT, both with the same output at the fly.

The real results will be shown in the before/after dyno's. I wouldnt care if my car got 115kw ATW or 140kw ATW. In the end, i'd be happier with the tune if my car was at 115kw and shot to 135kw, rather than 140kw to 150kw.

It should be an interesting day and a huge thanks to BMR Autowerkes and to Pete @ Advan for being our testing house. We're trying to limit the variables as much as possible (hence doing another before dyno on the same day we tune) so the difference is as accurate as possible.

Now to check that Pete has attached the car to the dyno the same way...

[Taymaishu]

Originally Posted by dr.bmw

any proven gains from a tune would be nice

so far there has only been promises

And this is something I hope to assist with. If it's a dud tune, we'll show you the results, so be it and that's another one to add to the dud list.

If it's a good tune, we'll show you the results.

Either way, we're about to show all of you some hard figures as a result of this tune. Fingers crossed, it will give some fair gains.

[Taymaishu]

Originally Posted by flinchy

2.3kw gain from a tune sounds really *REALLY* low, especially the hundreds of available dyno graphs all over the internet showing much larger gains?

ED: i mean, there's a thread on these very forums with this:


11. 140 rwkw Steve (Drawn05?) 125 AT [Tune]
125 AUTO so 160kw with more power loss than manual, with an unknown tune, gets 10kw less than something which apparently has almost 40kw more at the fly?

i'll be super disappointed with 145-150kw atw, it'd almost seem like they are flat out lying about the 195kw at the fly figure, 25+% drivetrain loss is almost unheard of.

Have you been able to get yours on a dyno yet?

[Drawn05]

Originally Posted by Taymaishu

And this is something I hope to assist with. If it's a dud tune, we'll show you the results, so be it and that's another one to add to the dud list.

If it's a good tune, we'll show you the results.

Either way, we're about to show all of you some hard figures as a result of this tune. Fingers crossed, it will give some fair gains.

So when are you going to be doing this?

I am happy to whack the 125 back on the dyno if you want to compare numbers.