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      07-31-2014, 02:42 PM   #1
Mike@N54Tuning.com
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S55 vs. N54 vs. N55 Dyno Comparison

Thought you guys might find this data interesting. These charts are comparing the S55 100% stock tuned for E30 to:

1) N54 with all bolt on mods and OEM turbos tuned for E50 + meth
2) N54 with all bolt on mods and RB (hybrid) turbos tuned for E50 + meth
3) N55 with all bolt on mods and Vargas (hybrid) turbo tuned for meth

Runs were done on the same dyno and 1-3 are all tuned as aggressively as possible. While we all know from BMS' other S55 dynos that there is another 30-40hp in the M3.

Considering the M3 is 100% stock it stacks up pretty well I'd say... I also happen to know the trap speeds for the vehicles above. N54 stock turbo 122mph, M3 126mph, N54 RB turbo 127mph, N55 VT2 turbo 123mph.

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      07-31-2014, 02:47 PM   #2
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That's pretty cool. The RBs are beastly, but the s55 is super impressive in stock form with a tune.
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      07-31-2014, 02:50 PM   #3
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Great post! Thanks!

Those RBs are monsters as always but M3 is stacking up great for a tune only car. Top end on RBs right there is straight nasty.
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      07-31-2014, 03:04 PM   #4
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Thanks for sharing
the new M3 is a beast
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      07-31-2014, 04:48 PM   #5
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@swamp2 @boss330

Is this real life? Any comments?
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      07-31-2014, 04:52 PM   #6
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I wonder how much extra RB modified s55 turbos can pump out
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      07-31-2014, 08:14 PM   #7
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Great info Mike, thanks!
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      07-31-2014, 10:38 PM   #8
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Surprising to see how well the RBs perform in the lower range, I was expecting them to make less power then the stock S55 turbos in that part of the RPM!
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      08-01-2014, 01:56 AM   #9
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Do people really run ethanol as a daily?
Or do they change tunes depending on the fuel?

.
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      08-01-2014, 08:01 AM   #10
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Quote:
Originally Posted by aus
Do people really run ethanol as a daily?
Or do they change tunes depending on the fuel?

.
The ones that have access to it; yes. I know many that do... I don't as I don't have e85 that isn't out of my way so i use it only on weekends or race days. Wouldn't the 2nd question be an obvious, yes?
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      08-01-2014, 08:35 AM   #11
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Very Nice! Thanks for posting!
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      08-01-2014, 09:49 AM   #12
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thanks for posting.

personally, im impressed with the power. BUT, I am not impressed with how the top end drops off compared to the stock powerband.

I understand that this is a sacrifice that must be made with the current stock constraints and hardware. you can up the boost in the midrange but the turbos cant keep spinning that much harder up top.

regardless, a 126mph trap is monstrous. id love to see a vid of that!
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      08-01-2014, 09:57 AM   #13
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Quote:
Originally Posted by aus View Post
Do people really run ethanol as a daily?
Or do they change tunes depending on the fuel?

.
Quick answer: Yes, and yes.

Quote:
Originally Posted by ASAP View Post
The ones that have access to it; yes. I know many that do... I don't as I don't have e85 that isn't out of my way so i use it only on weekends or race days. Wouldn't the 2nd question be an obvious, yes?
Good answer.

Quote:
Originally Posted by KennyPowers View Post
thanks for posting.

personally, im impressed with the power. BUT, I am not impressed with how the top end drops off compared to the stock powerband.

I understand that this is a sacrifice that must be made with the current stock constraints and hardware. you can up the boost in the midrange but the turbos cant keep spinning that much harder up top.

regardless, a 126mph trap is monstrous. id love to see a vid of that!
Agreed.
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      08-01-2014, 09:59 AM   #14
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Impressive for the S55 given it's running pump fuel. E30-E50 unlocks alot of power because there is ALOT more fuel being used and it's at a much higher octane rating.

The fact that a showroom stock tuned S55 can out-power a full bolt on N54 running e50 shows how far BMW has come in developing a twin turbo 3.0 liter engine while maintaining low emissions and good fuel economy.
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      08-01-2014, 10:09 AM   #15
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Quote:
Originally Posted by JoeFromPA
Impressive for the S55 given it's running pump fuel. E30-E50 unlocks alot of power because there is ALOT more fuel being used and it's at a much higher octane rating.

The fact that a showroom stock tuned S55 can out-power a full bolt on N54 running e50 shows how far BMW has come in developing a twin turbo 3.0 liter engine while maintaining low emissions and good fuel economy.
Ethanol allows the tuner to run much much more aggressive timing more than anything without having to be concerned with knock. My boost curve on my pump gas protune is identical to my e85 one... it's the timing that made all the difference.

In the case of the S55, it's a function of a much larger stock turbo and simply better flow of the components. Nothing particularly earth shattering in terms of technology or advancement IMHO.
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      08-01-2014, 10:10 AM   #16
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Quote:
Originally Posted by JoeFromPA
Impressive for the S55 given it's running pump fuel. E30-E50 unlocks alot of power because there is ALOT more fuel being used and it's at a much higher octane rating.

The fact that a showroom stock tuned S55 can out-power a full bolt on N54 running e50 shows how far BMW has come in developing a twin turbo 3.0 liter engine while maintaining low emissions and good fuel economy.
Well said! Additionally, it also gives better cooling and is easier to work with in tuning.
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      08-01-2014, 10:14 AM   #17
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Quote:
Originally Posted by ASAP View Post
Ethanol allows the tuner to run much much more aggressive timing more than anything without having to be concerned with knock. My boost curve on my pump gas protune is identical to my e85 one... it's the timing that made all the difference.

In the case of the S55, it's a function of a much larger stock turbo and simply better flow of the components. Nothing particularly earth shattering in terms of technology or advancement IMHO.
Lets not also forget at least for the n54 its protune capable with every variable accounted for and adjusted for that specific setup... S55 is not.
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      08-01-2014, 10:16 AM   #18
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Quote:
Originally Posted by 335iRlz View Post
Lets not also forget at least for the n54 its protune capable with every variable accounted for and adjusted for that specific setup... S55 is not.
That's correct... that's a function of not having a proper flash available .

The moment a flash is able to adjust for everything... this motor will be on another level.
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      08-01-2014, 10:23 AM   #19
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Isn't the S55 tuned for E30 in the OP??
I'm assuming they ran E30 during the dyno run?

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      08-01-2014, 10:28 AM   #20
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Quote:
Originally Posted by aus View Post
Isn't the S55 tuned for E30 in the OP??
I'm assuming they ran E30 during the dyno run?

.
That's correct. Stock everything. Tuned w/ E30 mix.
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      08-01-2014, 03:49 PM   #21
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Impressive and shows the future potential of the S55 once a complete tune becomes possible.
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      12-11-2015, 10:19 AM   #22
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n55 vs n54 vs s55

This is a comparison of s55 full bolt ons, n54 twin scroll 5862, n54 rb turbo, and n55 pure stage 2. I Know this data isn't 100% accurate but it gives you a good idea of the way the turbos perform. What i find the most interesting is the pure stage 2 n55 vs the rb n54, here you can see below 3500rpm the rb's have the pure stage 2 by a bit but above that point the n55 pulls stronger and keeps pulling from 6000-7000 where the rb's start to fall off. It seems like the Pure stage 2 n55 is the perfect match. Not sacrificing to much low end and still have the top end pull of the 5862. You can also see how the m4 falls off up top do to the twin turbo but from 0-5000rpm it has the pure stage 2 beat.
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