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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > M2 STG1 Turbo Dyno Result - vs M2 Stock & M4 ZCP stock

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      04-02-2018, 02:49 AM   #23
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Quote:
Originally Posted by Lukeni View Post
Very nice power delivery!

Do you think there are similar results possible (on a lower power level of course) without a turbo upgrade?

99% of all the tunes are losing power up top from 5500 rpm on to redline. I am looking for a tune which makes peak power up top at 6000-6500, but cant find any (except maybe active autowerke, but not sure about their dynochart).

My car is FBO as well. Fuelling won't be an issue since here in europe we got the good stuff.

Cheers!
M2 has more flow potential than other EWGs because of its slightly improved turbofold. From our testing, M2 is more octane limited up top than turbo. When it comes to octane, tuners tend to be conservative especially with OTS/canned map. Because gas quality varies a lot region by region, making mistake is very costly.

I think on stock turbo and good gas you can make a good top end that's worth revving up to, though peak still would lie in 5-6k if you max out there.

The way AA tune make peak at above 6k is they don't push hard at 5k~6k. This is good and bad. Good is power consistency and bad is less power at a critical rpm range.

BTW, by fueling, it's the high pressure fuel pump I meant, one of the known weak point of N55 that seems to be exaggerated by everyone these days.

Quote:
Originally Posted by Daleb View Post
Not bad for pump fuel. What is the quality of fuel like where you are?

Ever considered meth injection? Should see you nicely in the 7s over 100-200.
No, I have no intention to do injection kit at any time. 7s I will achieve with some other platform.
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      04-03-2018, 10:03 AM   #24
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I never felt that my M2 needed any more power than it came with, stock !!

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      04-04-2018, 10:42 PM   #25
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Quote:
Originally Posted by AGM2 View Post
I never felt that my M2 needed any more power than it came with, stock !!

Really? I feel my M2 is really slow. I haven't done actually tests yet, but it feels like my 2007 Saab 93 Aero Stage 0 is much faster. Maybe the power hits more at once in my Saab and the M2 is more linear, I dunno. But my M2 certainly doesn't feel like the rowdy beast I want at stock.
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      04-11-2018, 10:37 AM   #26
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SeanWRT you didn't do a stock map with bolt-ons dyno run?
Is your 340/375 run Fully Stock as you mentioned or it had the Dinan Turbo with Bolt-ons?
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      04-11-2018, 07:17 PM   #27
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Quote:
Originally Posted by FSociety View Post
SeanWRT you didn't do a stock map with bolt-ons dyno run?
Is your 340/375 run Fully Stock as you mentioned or it had the Dinan Turbo with Bolt-ons?
It was another M2 bone stock dynoed on the same day.
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      04-12-2018, 11:55 AM   #28
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Quote:
Originally Posted by SeanWRT View Post
It was another M2 bone stock dynoed on the same day.
You needed to do a stock map of your car
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      05-23-2018, 10:33 PM   #29
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I have mechanic do the install for me, so upgrading to STG1 turbo is just 1k+ USD to me, costing about the same as a HJS core downpipe. Worth it.

I know in the US and Europe, labor is expensive. I would suggest you go directly to Stage Two turbo.

Quote:
Originally Posted by GreatWhiteM2 View Post
Hi Sean,

Ive put my times against your times. See image below...Im thinking about the Stage1 turbo upgrade to help out the power drop off higher up the rev range.

Any thoughts?
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      05-24-2018, 02:08 AM   #30
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Quote:
Originally Posted by GreatWhiteM2 View Post
Hi Sean,

Ive put my times against your times. See image below...Im thinking about the Stage1 turbo upgrade to help out the power drop off higher up the rev range.

Any thoughts?
GWM2 - as per WA exchange - do the cheaper stuff 1st, fit the Pure Hi Flo inlet to stock turbo.

In my experience [JB4'd M135i EWG ran for 4 years on TM99 or SVP], this reaps good gains across the board ie more "area-under-the-curve" and allows more pull for longer in the upper rpm range.

This is also proven in the dyno pots I've sent you of my car + the ones shared by BishUK recently....My 2cents worth. BP
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      05-24-2018, 02:31 AM   #31
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Quote:
Originally Posted by GreatWhiteM2 View Post
Cheers BP, exactly what Im going for first.
& should you decide need more, whilst Sean's advice below is solid.......

Quote:
Originally Posted by SeanWRT View Post
I know in the US and Europe, labor is expensive. I would suggest you go directly to Stage Two turbo.
.....post upgrading turbo, the £££ you've just spent will then quickly reveal the limitations of the stock fuel system. Much more £££ [PI, LPFP and maybe HPFP] is needed to realise the potential of your upgraded turbo "investment" - soon becomes a very steep slippery slope....

I looked into this a fair bit with my M135i [to make the jump from low to high 400's bhp reliably] and not worth it IMHO.

BP
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      05-24-2018, 03:02 AM   #32
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Guys,

At this point, I'm upgrading to something else. My goal is to have M2 N55 truly match a pump gas tuned S55, meaning put down anywhere from 450-480whp Dynojet number as I like.

I thought M2 power is perfect as my car is now, and I hate it having 450+whp with F8X RWD flatform. But blame BMW for this - not doing what I am doing, I would be walked away with no respect by M2 competition with a flash needing nothing else, which I'm not comfortable with.

As always, no meth, no PI. Drive and maintain 100% like stock. I will share more down the road as I progress.
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      05-24-2018, 05:34 AM   #33
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Quote:
Originally Posted by SeanWRT View Post
I thought M2 power is perfect as my car is now
Sean,

what is the current spec of your M2 in terms of your upgrades etc ?

What grade fuel do you run it on in China to get the results posted above ?

BP
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      05-24-2018, 09:14 AM   #34
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Quote:
Originally Posted by Bee Pee View Post
Quote:
Originally Posted by SeanWRT View Post
I thought M2 power is perfect as my car is now
Sean,

what is the current spec of your M2 in terms of your upgrades etc ?

What grade fuel do you run it on in China to get the results posted above ?

BP
According to the dyno result in my OP, my car put down slightly more power than a stock M4 ZCP (same 98RON, same day, same dyno) and with a linear torque curve. I stick to RON98, the US AKI93 equivalent.

I guess 450-480whp on pump gas will be the new perfect at the time of having S55 M2 with us.

Heck, even new G20 M340 will have 380hp. I bet it will put down 370whp because it has 48V system carrying all the burden which is 20-30whp worth.

Upper the game M2 Originals please.
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      05-24-2018, 09:35 AM   #35
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Do any of the Stage 2 turbo setups not introduce turbo lag?
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      05-24-2018, 10:12 AM   #36
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Quote:
Originally Posted by Bee Pee View Post
Sean,
what is the current spec of your M2 in terms of your upgrades etc ?
Pure Inlet Pipe
Wagner Evo2 Comp Intercooler
ER Charge Pipe
HJS 300 cell Downpipe & MPE catback
Dinan Turbo
GFB DV+
Custom Tuned by Halim on RON98.

Quote:
Originally Posted by ZM2 View Post
Do any of the Stage 2 turbo setups not introduce turbo lag?
No. But it could be realized if PURE use a Garratt DBB CHRA and Titanium Turbine. Cost is going to be 6~7K + core deposit. I would do it should it happen.
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      05-24-2018, 10:47 AM   #37
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Quote:
Originally Posted by SeanWRT View Post
Pure Inlet Pipe
Wagner Evo2 Comp Intercooler
ER Charge Pipe
HJS 300 cell Downpipe & MPE catback
Dinan Turbo
GFB DV+
Custom Tuned by Halim on RON98.
Nice spec - was custom tune via BM3 or Halim@HCP directly ?
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      05-24-2018, 11:22 AM   #38
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Quote:
Originally Posted by Bee Pee View Post
Quote:
Originally Posted by SeanWRT View Post
Pure Inlet Pipe
Wagner Evo2 Comp Intercooler
ER Charge Pipe
HJS 300 cell Downpipe & MPE catback
Dinan Turbo
GFB DV+
Custom Tuned by Halim on RON98.
Nice spec - was custom tune via BM3 or Halim@HCP directly ?
It's a WinOL map delivered thru BM3. Either way, make little difference really.
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      12-10-2018, 06:53 PM   #39
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Hey SeanWRT I’m thinking about grabbing the Akropovic 300 cell DP to go with my Dinan Turbo & IC.

Do you see any issues with simply loading and running your BM3 map on track if I have easy access to 93 (and 100) octane here in the US?

Thanks.
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      12-10-2018, 06:58 PM   #40
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Quote:
Originally Posted by ZM2 View Post
Hey Sean, I'm thinking about grabbing the Akropovic 300 cell DP to go with my Dinan Turbo & IC.

Do you see any issues with simply loading and running your BM3 map on track if I have easy access to 93 (and 100) octane here in the US?

Thanks.
This specific 410+whp map is good on street but on track it's too aggressive for 93OCT. From my logs it starts to pull a bit timing at 90F of IAT and become unacceptable to use approaching 110F. The track condition would be consistently 30+F above ambient, so 120~130+F of IAT is normal.

BM3 OTS STG2 93OCT is a good map for track if you use Dinan turbo. I logged it in May with high ambient temp and knew that.
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      12-10-2018, 07:02 PM   #41
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Quote:
Originally Posted by SeanWRT View Post
This specific 410+whp map is good on street but on track it's too aggressive for 93OCT. From my log it starts to pull a bit timing at 90F of IAT. The track condition would be consistently 30+F above ambient.

BM3 OTS STG2 93OCT is a good map for track if you use Dinan turbo. I logged it in May with high ambient temp and knew that.
Got it. Do you think running 97-100 octane with your map would help with the timing on hot days?
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      12-10-2018, 07:06 PM   #42
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Quote:
Originally Posted by ZM2 View Post
Quote:
Originally Posted by SeanWRT View Post
This specific 410+whp map is good on street but on track it's too aggressive for 93OCT. From my log it starts to pull a bit timing at 90F of IAT. The track condition would be consistently 30+F above ambient.

BM3 OTS STG2 93OCT is a good map for track if you use Dinan turbo. I logged it in May with high ambient temp and knew that.
Got it. Do you think running 97-100 octane with your map would help with the timing on hot days?
Definitely! Difference is huge.

If your oil temp is good, only thing holding you back power wise is IAT. More Octane means greater capability of handling high IAT.
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      12-10-2018, 07:20 PM   #43
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Quote:
Originally Posted by SeanWRT View Post
Definitely! Difference is huge.

If your oil temp is good, only thing holding you back power wise is IAT. More Octane means greater capability of handling high IAT.
Great to hear.

I was reading over the the BM3 STG2 93OCT thread that you don’t even think I would need the DP for this scenario.

Do you think the DP would either provide more power or reliability with these maps and 93-100 octane?

Thanks.
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      12-10-2018, 07:27 PM   #44
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Quote:
Originally Posted by ZM2 View Post
Great to hear.

I was reading over the the BM3 STG2 93OCT thread that you don’t even think I would need the DP for this scenario.

Do you think the DP would either provide more power or reliability with these maps and 93-100 octane?

Thanks.
I have not seen a proper comparison with and without DP. But DP will reduce EGT in any case, and thus decrease in cylinder temp, which is critical over repeated pulls. Also stock cat will die quickly with heavy track use.
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