Where is my Power ??? DYNO M3 E92 6MT

[ALCOBENDAS]

Hello, from Spain, I have an M3 e92 6mt 2007

The car is about 64k milles and has a silent Toyosport exhaust rear and a KN filter in its original box

The car works perfectly and the maintenance is correct ...

Where are my power?

The shape of the dyno graph seems perfect, only 50hp is missing.

What is your opinion?

I apologize for my bad English ..

[pbonsalb]

Maybe the dyno is accurate if it is showing power and torque at the rear wheels instead of the engine crankshaft. What kind of dyno?

[ALCOBENDAS]

The dyno are DYNOSTAR AWD.. the cars measured are ok..

My M3 circulating has power like 374 .. not like 420 ..

[BOOF-M3]

Off topic but is it actually a 2007 titled M3 or was it just born in 2007? For the color I'm assuming that's a wrap? She looks awesome, sorry about the HP, you will work it all out.

[EnVe46]

Originally Posted by BOOF-M3

Off topic but is it actually a 2007 titled M3 or was it just born in 2007? For the color I'm assuming that's a wrap? She looks awesome, sorry about the HP, you will work it all out.

Across the pond they're 2007 as the starting year.

Op, it's best to check basic maintenance items, spark plugs being the first. These respond very well to fresh plugs.

How did the others cars that were ran work out? Were they also lower than expected? We see that a lot on dynos, people expect more only to get crushed by the numbers it reads. Dynos vary and some read low while others read high. I doubt spark plugs would yield you the difference you expected but start a check list of things to inspect and go from there

[Helmsman]

374hp is about the highest I've seen on a OEM car, be happy OP! Most guys seem to end up around 350hp on the dyno. What the problem?

[///M Power-Belgium]

Originally Posted by ALCOBENDAS

The dyno are DYNOSTAR AWD.. the cars measured are ok..

My M3 circulating has power like 374 .. not like 420 ..

Normal .

[ALCOBENDAS]

I will try to explain it well ..

Power is measured at the engine / flywheel

The car is from september 2007, the color is wrap, thanks

basic maintenance are ok .. new plugs all filter and others .. no ecu errors .. only not change the coils .. (I'm thinking about that ...) but the car is fine and smooth ..

other cars in that dyno give the expected power and everyone is happy .. it only seems that the M models lack power .. there are no other M3 e92 to compare ..

374hp at motor/flywheel.. are worse.. OEM are 414/420...

I just installed a new bearings, full stage 2 evolve and Macht Schnell but I do not want to go even to the dyno since I've noticed a lot of improvement .. but the times 100 to 200kph or 60 to 120 mph are times oem car ... I think now I'll have the 420hp oem ..

I want to see where the 40 or 50hp are that I am missing ..

///M Power-Belgium :explain it please

[eatsleepboost]

How can the Dyno measure hp at the flywheel? Unless you removed the engine and dynoed it out of the car on an engine Dyno you are not checking flywheel hp.

A dynostar AWD Dyno is measuring the hp/tq at all 2 or 4 drive wheels. That is not crank hp. Wheel hp (whp) is being measured.

So as stated above 350 or higher whp is good for a non supercharged m3 and you should be happy.

[///M Power-Belgium]

Originally Posted by ALCOBENDAS

I will try to explain it well ..

Power is measured at the engine / flywheel

The car is from september 2007, the color is wrap, thanks

basic maintenance are ok .. new plugs all filter and others .. no ecu errors .. only not change the coils .. (I'm thinking about that ...) but the car is fine and smooth ..

other cars in that dyno give the expected power and everyone is happy .. it only seems that the M models lack power .. there are no other M3 e92 to compare ..

374hp at motor/flywheel.. are worse.. OEM are 414/420...

I just installed a new bearings, full stage 2 evolve and Macht Schnell but I do not want to go even to the dyno since I've noticed a lot of improvement .. but the times 100 to 200kph or 60 to 120 mph are times oem car ... I think now I'll have the 420hp oem ..

I want to see where the 40 or 50hp are that I am missing ..

///M Power-Belgium :explain it please

Originally Posted by eatsleepboost

How can the Dyno measure hp at the flywheel? Unless you removed the engine and dynoed it out of the car on an engine Dyno you are not checking flywheel hp.

A dynostar AWD Dyno is measuring the hp/tq at all 2 or 4 drive wheels. That is not crank hp. Wheel hp (whp) is being measured.

So as stated above 350 or higher whp is good for a non supercharged m3 and you should be happy.

Yep ! I agree .

[ALCOBENDAS]

Try to explain.. the dynos in Spain.. i dont know Europe.. take the rotative measure in up rpm and down rpm to calculate the lost power train.. and calculate motor hp... the car have 374 flywheel real hp.. the times are worse as Bmw stock says…

I hope other usen can explain well… i dont a expert..

Let's forget that the problem is dyno .. I have seen several M3 e92 with the same problem .. up to 3000rpm are the same and from there they are losing power compared with other stock ..

[tlow98]

Yeah most dynos in Europe ‘measure’ or, more accurately calculate engine bhp based on drivetrain loss estimates. It’s wonky.

We really need another M3 dyno sheet example from this exact dyno that shows the difference.

In general tho, 50bhp and a good looking curve means your engine is either in a poor state of tune, is worn out or we’re actually looking at a wheel dyno figure.

Can’t do much for over here with the information provided...

[maicol76]

Sorry, I stole it.
That is in my engine.

[Redd]

Calculated engine figures are horribly inaccurate. Ask your dyno if they can show you your actual measured power at the wheel. That's more accurate.

Fwiw, most stock E9x M3 do about 320-330 wheel hp in Dynojet. 350+ wheel hp with exhaust.

[Mvy]

Its probably a wonky calculation of crank hp. To be sure your car is putting out all the power it can, if they are not recently done, replace all your coils and plugs and make sure you dont have any exhaust leaks. Also remember, a difference of 50hp between different stock M3s has been reported before so this could be totally normal.

[ALCOBENDAS]

I'm going to try to organize this a bit ... on Monday I will ask in the workshop if the measurement also has power to the wheels .. I think so .. but they do not deliver it ..

I modify my initial question, which could fail if in a dyno test one m3 have perfect power up to 3000rpm, it lacks 5whp at 3500rpm 10whp at 4500rpm 15whp at 5500 20whp at 6500 25whp at 7500 and 30whp at 8400 ..
Let's think that stock has about 310whp maximum. What could be failing? think that here we use 98 octane gasoline

That's what I need to investigate to try to solve my problem .. because forgetting the measurement of the dyno .. my car accelerates less than what the official tests on the car says .. so it does not have the original power .. 420bhp..

Thanks for the replys ... and sorry for trying to explain

PD:I add a picture what was expected of the stock car, you can compare it with what mine has

[ALCOBENDAS]

Originally Posted by Mvy

Its probably a wonky calculation of crank hp. To be sure your car is putting out all the power it can, if they are not recently done, replace all your coils and plugs and make sure you dont have any exhaust leaks. Also remember, a difference of 50hp between different stock M3s has been reported before so this could be totally normal.

Do you know if those people managed to solve the difference?

I'm thinking about putting all the new coils .. but I do not know if I'll throw the money .. since the car works smoothly and well .. if someone solved it before that ... I would do it without hesitation ..

[serranot]

If the engine is performing normally with no codes or other indications of a problem, there is nothing to fix. It sounds like there is enough built-in slop to the dyno that this could be the result. If it feels good when you drive, OP, then leave it alone.

Certainly if you had a factory new engine and referenced it on a factory dyno, then it might be a problem. I do not see that that is the case.

[eatsleepboost]

Sounds like you need to know what another car that is the same as yours makes on that Dyno to compare. If you can find somebody that has dynoed at the same place and the car made similar numbers and feels strong when driven then you are right on par.

You also could roll race another car the same as yours and if you are really down 50hp you should get beat by a few car lengths through a couple years.

[ALCOBENDAS]

thanks for the replys, I know that the car lacks power because of the acceleration measurements, the 60 130mph and the 100-200kmh in my car are about 2seconds worse than the official and what is measured on the internet videos..

Now that I have a full stage 2 setup installed, my times are like an m3 e92 stock ..

[Mvy]

Originally Posted by ALCOBENDAS

Do you know if those people managed to solve the difference?

I'm thinking about putting all the new coils .. but I do not know if I'll throw the money .. since the car works smoothly and well .. if someone solved it before that ... I would do it without hesitation ..

Its best to dyno before mods so you dont start with an assumed stock HP #. Believing I was starting with a stock car that was 420 at the crank is where my heartbreak with Dynos began because in real life testing I was under that #.

Whatever HP your car was born with is what you have to start with. I dont think its a problem you can solve per se. All you can do is maintain your car the best you can. Make sure spark and exhaust are in order. If it runs smoothly with no codes or other issues, then maybe just live with the disappointment and start bolting on mods.

I was 30-50 hp under with the same bolt ons as other cars so I know your pain.

[ALCOBENDAS]

Originally Posted by Mvy

Its best to dyno before mods so you dont start with an assumed stock HP #. Assuming you are 420 at the crank is where my heartbreak with Dynos began. Whatever HP your car was born with is what you have to start with. I dont think its a problem you can solve per se. All you can do is maintain your car the best you can. Make sure spark and exhaust are in order. If it runs smoothly with no codes or other issues, then maybe just live with the disappointment and start bolting on mods.

I was 30-50 hp under with the same bolt ons as other cars so I know your pain.

The only thing I think I can do is put the 8 new coils (are oem 2007year) .. but I have never had any error .. the rest seems to work all right .. as these cars are very sensitive to knocking .. I do not know if the coils may be failing and have my loss of power there

I would like to find someone like us .. to put the new coils and see what results he has had ..

You did not get to fix it, right?