[astefanidis1]

Hey guys, hoping to get some help here. My buddy had a 2019 M2 Comp (6-spd) that had some mods done to it, but unfortunately the engine blew before he got to take it to a drag strip or dyno. We're trying to figure out roughly how much power it likely would've put down.

I tried searching other's mods and dyno sheets and it's a bit overwhelming, seeing tons of different results. Figured id make a post here and hopefully someone can help us out!

So it's FBO S55, Catless Downpipes charge pipes intake and BM3 stage 2+ tune.

Hopefully someone has a similar build 🙏

[MSH_]

Check BMW DIY Guy post from a couple yrs back....

https://f87.bimmerpost.com/forums/sh...2#post27414772

[astefanidis1]

Oh wow, so around 504 to the wheels? That's actually really impressive

[jayee88]

Originally Posted by MSH_

Check BMW DIY Guy post from a couple yrs back....

https://f87.bimmerpost.com/forums/sh...2#post27414772

That looks like those numbers were with a custom tune, BM3 Stage 2 on 93 gas and downpipes should make just under 500whp. BM3 doesn't have a stage 2+ that I know of, unless your friend meant they had the CS+ tune which is the stock CS power with the torque curve adjusted iirc.

I don't have a dyno sheet unfortunately, but I'm currently on BM3 stage 2 and my butt dyno is telling me it's about 100hp faster than the stock ~400hp.

[MSH_]

Originally Posted by jayee88

That looks like those numbers were with a custom tune,....

Says "OTS tune" (off the shelf) At least coming from Audi/VW world OTS was not custom.

3/30/2021 - 22rpd in Renton
OTS S2 BM3 Map - Active Autowerke catless DP and performance midpipe
RWP averaged SAE corrected - 503.7 (+42.3 over CS catless, +107.7 over stock)
Torque average SAE corrected - 548.62 (+103.7 over CS catless, +87.22 over stock)

[BMW DIY Guy]

Originally Posted by MSH_

Says "OTS tune" (off the shelf) At least coming from Audi/VW world OTS was not custom.

3/30/2021 - 22rpd in Renton

OTS S2 BM3 Map - Active Autowerke catless DP and performance midpipe

RWP averaged SAE corrected - 503.7 (+42.3 over CS catless, +107.7 over stock)

Torque average SAE corrected - 548.62 (+103.7 over CS catless, +87.22 over stock)

Correct, that is the off the shelf BM3 tune.

[astefanidis1]

Originally Posted by BMW DIY Guy

Correct, that is the off the shelf BM3 tune.

Have you ever taken yours to the Drag strip by any chance?

[BMW DIY Guy]

Originally Posted by astefanidis1

Have you ever taken yours to the Drag strip by any chance?

Sadly no.. every time I planned to go something would come up. Missed like 4 times.

[astefanidis1]

Originally Posted by BMW DIY Guy

Sadly no.. every time I planned to go something would come up. Missed like 4 times.

That's the worst haha I know the feeling. All good. Appreciate you chiming in

[jayee88]

Originally Posted by MSH_

Says "OTS tune" (off the shelf) At least coming from Audi/VW world OTS was not custom.

3/30/2021 - 22rpd in Renton
OTS S2 BM3 Map - Active Autowerke catless DP and performance midpipe
RWP averaged SAE corrected - 503.7 (+42.3 over CS catless, +107.7 over stock)
Torque average SAE corrected - 548.62 (+103.7 over CS catless, +87.22 over stock)

Whoops, my eyes were focusing on the "22rpd in Renton" so I assumed it was a custom tune by them!

[MSH_]

Originally Posted by astefanidis1

Hey guys, hoping to get some help here. My buddy had a 2019 M2 Comp (6-spd) that had some mods done to it, but unfortunately the engine blew before he got to take it to a drag strip or dyno....

Has it been determined what happened? Fueling issue or dreaded crank hub? Assuming if he was getting into stage 2 crank hub would have been done but maybe not?
Seems he would have been well under safe wtq limits on stock S55 block at stage 2. It's tq (especially coming on too early in rev range) that can bend a rod, but I think S55 stock block is good to roughly 650wtq.

[astefanidis1]

Originally Posted by MSH_

Has it been determined what happened? Fueling issue or dreaded crank hub? Assuming if he was getting into stage 2 crank hub would have been done but maybe not?
Seems he would have been well under safe wtq limits on stock S55 block at stage 2. It's tq (especially coming on too early in rev range) that can bend a rod, but I think S55 stock block is good to roughly 650wtq.

He did the crank hub fix. I think it was actually the Turbo that blew but I'm not 100% sure