[mike@x-ph.com]

Congrats OP glad you like it!!


Its definitely not for everyone, for 3K you can get a lot more than 30 whp and 45 tq + an exhaust but of course keeping your warranty comes at a price

[FeelinBlessed]

^Yes the JB4 + meth tune on a B58 is very very tempting but just cannot risk losing warranty on a BMW...
The thought of being able to beat a stock M4 in straights is Awesome!
Perhaps down the line when I no longer have factory warranty I'll try it...
Maybe not...
I'll probably have an M3/4 by then

[TheObviousChild]

Originally Posted by cptcrunch

93 Octane from the local UDF.

Brings up a good question though, I wonder how the car would perform with anything lower.

I live in the Denver area at 5000ft. 91 is the highest we get at the pump and it performs great.

[Araemo]

Originally Posted by Bee Pee

Both dyno lines looks like max rpm is beyond 7k rpm. My understanding is B58 rev limiter kicks in 7k rpm.

MPPSK dyno line looks like rev limit is raised by ~ 250rpm, which is contrary to oem tech specs that show no change in rev limit.

Interesting comment.

Particularly important for the HP numbers (Torque #s shouldn't be dependent on RPM). If the dyno thinks the car is running at a higher RPM than it is, its HP calculation will be inflated slightly. If I eyeball their graph, it looks like the torque at the very end* of the run is right around 265. 265 * 7000 / 5252 = 353.2, not 368.1 (But 265 * 7250 / 5252 = 365.8).. I'd love to see more dynos from other people.

I always thought dynos plugged into OBD to get real-time RPM info from the car though?

*: Right before the fall-off from obviously hitting limiter or removing foot from gas.

[shawntech]

Regarding cost once u buy jb4/midpipe/exhsust ur pretty much at mppsk level and jb4 makes the same power sans noise, less ideal drivability no?

[mike@x-ph.com]

Originally Posted by ls3c6

Regarding cost once u buy jb4/midpipe/exhsust ur pretty much at mppsk level and jb4 makes the same power sans noise, less ideal drivability no?

Jb4 makes a lot more power and with a REMUS exhaust (catback) you are looking at ~ $2000

[Portadown95]

Wow! 363 hp at the wheels is almost as much as a stock ford coyote 5 liter (378hp at the wheels). Have to look to see how the torque curves compare.

[J_MENIS]

Originally Posted by goj

Hmm, what is the cost of e85?

There is an E85 station i think in red wood city and one down near potrero in SF. Id love to see how my 435i would do against the 340, if your down.

[goj]

Originally Posted by J_MENIS

There is an E85 station i think in red wood city and one down near potrero in SF. Id love to see how my 435i would do against the 340, if your down.

Haha I am down but my Car is stock but I suppose that would be an interesting comparison.

[cmplaya]

i haven't looked at a lot of these...i thought in stock form peak torque was supposed to be available at 1300 rpm?

Originally Posted by cptcrunch

I'm separating this from the official launch thread about the MPPSK because I feel that a lot of people are interested in the numbers and may not know they are available without reading the entire thread. If the Mods feel that this is a duplicate, or un-necessary, it can be removed.
***

Before I installed the MPPSK on my 2016 340i RWD AUTO, I did a before dyno. The after dyno was done today, and here are the results:


Alright, here we go!

Dyno run today at 4PM went well after they fixed an issue with the atmospheric calculation numbers. Heres a few youtube clips of the dyno runs

Exhaust sounds great! Really love the deep and aggressive tones the car now produces. I've started to notice that people are getting out of my way on the interstate, and I'm thinking it has something to do with the exhaust.

Someone asked for a video of the exhaust at idle in sport mode

*all videos taken with a Nexus 6P


And here are the final results!

Before:

331 HP and 325 TQ


After:

368 HP and 370 TQ

Based on my dynos (disclaimer: Your Mileage WILL Vary), the MPPSK increased the HP by 37 and TQ by 45 at the wheels. BMW claims a 35HP and 39TQ increase over the stock motor, and I am seeing exactly that. These numbers do show that BMW has under rated their engines, as usual, by a significant number. If we account for a 15% drivetrain loss (and correct me if this number is inaccurate), we are looking at 433HP and 435TQ at the crank after the MPPSK.

<Insert emojis here>

Overall I am pleased with the kit. Yes we have seen tunes that produce bigger numbers, exhausts that are bigger, prettier and sound better, but none of these come with the backing by BMW to fix whatever is broken, no questions asked. Is $3,000 a lot for a tune and exhaust? Sure is. But with the peace of mind of a BMW factory warranty, I feel that it is worth the cost.

With the numbers now posted, I am curious if this will increase sales. Is a 10% increase in HP/TQ and warranty enough for many to purchase this kit? Or will a larger increase in HP/TQ for cheaper without warranty win people over? Time will tell.

Finally, after all of these years of taking from the forums, I have helped science the shit out of something! (well, really, I didn't do a lot, just paid the dyno guys $200 and walked around their shop)

[Araemo]

Originally Posted by cmplaya

i haven't looked at a lot of these...i thought in stock form peak torque was supposed to be available at 1300 rpm?

That's measured differently.

On the brake (engine) dyno used during development by the auto manufacturers, they run the engine at full throttle but with enough resistance (applied by computer control) to completely prevent it from accelerating, which can allow the turbo to spool up slowly over time until it is producing maximum boost. Then they report that # as the torque/hp at that rpm. Then they change the target rpm and do it again. These steady-state numbers are not including drivetrain losses, or the additional losses triggered by accelerating the rotating assemblies. The biggest benefit they get is letting the turbo slowly spool to maximum boost. But the reduced losses from having all the rotating components of the engine already 'at speed', lowering their drag contribution, also allows them to produce higher #s.

When accelerating through the rev range, the turbo can't possibly spool that quickly, so you'll probably never see that reflected in a chassis dyno where you do a 'pull' from low rpm to high rpm.

Also, you have to remember that the pull doesn't start from 0 rpm, the engine is already running and in gear when the pull starts, and I don't know what RPM they were at when they started accelerating.

[daveyfx]

Originally Posted by mike@x-ph.com

Jb4 makes a lot more power and with a REMUS exhaust (catback) you are looking at ~ $2000

Seems like Remus exhaust sound bytes are scarce, but the few BMW-specific that I could find sound more subdued than the MPPSK exhaust. Would you say that's correct? If I were to go aftermarket exhaust, I'd want to go as quiet as possible, but with just a hint of aggression. Seems like this is what Remus tries to accomplish.

Do you know if Remus includes valves to control sound output in comfort/sport mode? If it does, going JB4 + Remus certainly would seem more appealing than the MPPSK.

Thank you!

[mike@x-ph.com]

Originally Posted by daveyfx

Seems like Remus exhaust sound bytes are scarce, but the few BMW-specific that I could find sound more subdued than the MPPSK exhaust. Would you say that's correct? If I were to go aftermarket exhaust, I'd want to go as quiet as possible, but with just a hint of aggression. Seems like this is what Remus tries to accomplish.

Do you know if Remus includes valves to control sound output in comfort/sport mode? If it does, going JB4 + Remus certainly would seem more appealing than the MPPSK.

Thank you!

REMUS includes valve control

[daveyfx]

Originally Posted by mike@x-ph.com

REMUS includes valve control

Is it more quiet than the exhaust from the MPPSK? I'm all about exhausts that are quiet when cruising (no drone) and aggressive when you get on it.

[FeelinBlessed]

Originally Posted by daveyfx

Is it more quiet than the exhaust from the MPPSK? I'm all about exhausts that are quiet when cruising (no drone) and aggressive when you get on it.

MPPSK has quite a bit of drone in sport/sport+ mode but no drone in comfort mode. I don't mind a little drone but it's good to have choices when driving long distances. But I find myself in sport+ mode 95% of the time

As for loudness goes, I had a 370z with intakes, HFC, and full catback... this car is significantly louder. I can't wait till the break in period to be over
Only 750 more miles to go lol

[mike@x-ph.com]

Originally Posted by daveyfx

Is it more quiet than the exhaust from the MPPSK? I'm all about exhausts that are quiet when cruising (no drone) and aggressive when you get on it.

REMUS is sound is deep and throaty ... When you are driving it won't be too loud but once you go Wide open throttle you will hear it

[competition]

OP, I'm curious to know how your car made so much more power than mine. I wonder if it's the 93 octane. I'm waiting for EAS to send me my dyno graph. I made around 340hp and 375wtq. I will post it as soon as I can.

[riskmaker76]

Octane has a huge impact... Put in E20 and that will bring you to 93 octane and retest... I bet you will see a nice jump.

Originally Posted by blau_340i

OP, I'm curious to know how your car made so much more power than mine. I wonder if it's the 93 octane. I'm waiting for EAS to send me my dyno graph. I made around 340hp and 375wtq. I will post it as soon as I can.

[cptcrunch]

Originally Posted by blau_340i

OP, I'm curious to know how your car made so much more power than mine. I wonder if it's the 93 octane. I'm waiting for EAS to send me my dyno graph. I made around 340hp and 375wtq. I will post it as soon as I can.

No idea. Straight pump gas, 93 octane from the local UDF. There was another member who had 400+ on their dyno. Comparisons between cars, dynos, days, etc is tricky. All I can say is that if the difference between the before and after looks good, then I would ignore the "final" number and enjoy the car.

I mean, every engine is different. Some perform better than others and some worse. I looked at the delta mainly and found it spot on. And while I liked the final numbers, there is always a more powerful car.

What I do know is that my car is way too fast for the streets (can't use all the power) and fast enough on the track (mid-ohio) to keep up with many porsches, corvettes, etc. Now, only if the suspension was better, and tires, and brakes, and ...

[M4ENY]

I own a 340i X drive MPPSK and was wondering if the dyno for a rwd car would be similar to mine? I realize that AWD and RWD have different loss% but was curious if the numbers from this dyno (RWD + loss) would be similar to mine (AWD + loss)

[Araemo]

Originally Posted by M4ENY

I own a 340i X drive MPPSK and was wondering if the dyno for a rwd car would be similar to mine? I realize that AWD and RWD have different loss% but was curious if the numbers from this dyno (RWD + loss) would be similar to mine (AWD + loss)

There's been one dyno of an AWD MPPSK car posted, the #s are noticeably lower. But that's to be expected to some degree.

[Beek]

Originally Posted by M4ENY

I own a 340i X drive MPPSK and was wondering if the dyno for a rwd car would be similar to mine? I realize that AWD and RWD have different loss% but was curious if the numbers from this dyno (RWD + loss) would be similar to mine (AWD + loss)

Easy answer is forget RWD vs AWD and think HP and TRQ at the Crank, then assume same fuel and conditions. Your B58 motor is the same as his or mine.