Did BMW Lie??

[w00tw00t]

so most stock M3 dyno's I've seen have it at ~320hp at the wheel.. compensating for drive train losses that comes to about 370hp at the crank... so where the hell did the 414hp figure come from?

[Seattle S65B40]

Good question. Subscribed. I doubt it's that far off from 414 but curious to see what the gearheads say.

[Bosna]

Most of the stock Dynos I've seen read ~350. I've seen maybe one ~320, but I think it was an anomaly.

[Mr. ///M3 RD]

Originally Posted by w00tw00t

so most stock M3 dyno's I've seen have it at ~320hp at the wheel.. compensating for drive train losses that comes to about 370hp at the crank... so where the hell did the 414hp figure come from?

I guess you are right .....

Here is one such test result

Still a lot of horses for us to tame

[FVM3]

stock m3 dyno hp is much less then what i expected

[ES_TRADER]

its actually 420..NOt 414...so yea, they lied??

[Erhan]

Originally Posted by richpuer

its actually 420..NOt 414...so yea, they lied??

420bhp=414hp

[zamm3k]

What dyno's are you talking about? Mustang? Dynapack? Dynojet? all numbers fluctuate depending on dynos and dyno operators. But if it helps you compare, Lexus IS-F and C63 AMG have similar numbers, the M3 takes the IS-F and the C63 takes the M3, so you do know they're around the claimed numbers.

With that being said, I have seen a lot of stock dynos around 350's, including my car which dyno'ed around 345 on a mustang.

[Mr. ///M3 RD]

Originally Posted by erhanh

420bhp=414hp

small correction ...

420 PS = 414 HP

PS in German is Pferde Stärke

Pferde Stärke = Horse Power

slight difference in the formula to calculate the HP

[Erhan]

Originally Posted by Rolf-Dieter

small correction ...

420 PS = 414 HP

PS in German is Pferde Stärke

Pferde Stärke = Horse Power

slight difference in the formula to calculate the HP

Thanks

[-=Hot|Ice=-]

Yeah, The M3 dyno's at 340+ to the rear wheel depending on what dyno you use. We had a thread about this a little while ago, and I wanted to repeat what I said in that thread,

Am I the only one who thinks 330 to the rear wheels is anemic compared to the other cars in it's class? I mean, I question the 4.0 0-60 time now.

[Twinbo]

Lots of questions remain for me here:

1. Elevation where Dyno was performed?
2. What kind of dyno (types already mentioned above)?
3. Skill of technician performing the run (is his software up to date etc)

I had a blown mustang previous to my e92 being shipped and in Calgary, AB (4800 ft above sea level) it put out 387whp at 7psi. Similar kits in say, New York, were putting out well over 425whp on a Mustang dyno.

Just some food for thought.

[Radiation Joe]

I assume you all test drove your cars before your bought them.
You weren't savvy enough to determine your cars were underpowered until you read on the internet that dyno numbers from Joe Schmoes Dyno Shop and convenience store say the car isn't fast enough?????

[Z K]

Originally Posted by zamm3k

What dyno's are you talking about? Mustang? Dynapack? Dynojet? all numbers fluctuate depending on dynos and dyno operators. But if it helps you compare, Lexus IS-F and C63 AMG have similar numbers, the M3 takes the IS-F and the C63 takes the M3, so you do know they're around the claimed numbers.

+1

No two dynos will put out the same numbers. A dyno is a tuning tool, you use it to tune the car. Unless it's the exact same dyno, you can't compare numbers between them.

[-=Hot|Ice=-]

Originally Posted by Radiation Joe

I assume you all test drove your cars before your bought them.
You weren't savvy enough to determine your cars were underpowered until you read on the internet that dyno numbers from Joe Schmoes Dyno Shop and convenience store say the car isn't fast enough?????

No one is saying it's not fast enough. 330 to the rear wheels just sounds anemic. That's why a 335i can take the M3 in a straight line with a tune. Not a huge difference in power. For the street, it's plenty with a couple extra.

[klammer]

Originally Posted by Radiation Joe

I assume you all test drove your cars before your bought them.
You weren't savvy enough to determine your cars were underpowered until you read on the internet that dyno numbers from Joe Schmoes Dyno Shop and convenience store say the car isn't fast enough?????

Agree completely. It's never a problem when you're behind the wheel, mostly the keyboard. Don't see too many "got smoked at the track/ on the street" threads. At this level it's more driver than car and if your talking straight line you bought the wrong car... IMHO

[PhillyNate]

Originally Posted by klammer

Agree completely. It's never a problem when you're behind the wheel, mostly the keyboard. Don't see too many "got smoked at the track/ on the street" threads. At this level it's more driver than car and if your talking straight line you bought the wrong car... IMHO

I'm with you guys. I'm coming from a manual E92 328i. That car was great but this one is that much better. Not even close. The dyno/HP numbers don't tell the whole story.

[rye m3]

Originally Posted by -=Hot|Ice=-

mean, I question the 4.0 0-60 time now.

I don't get that comment. How do you question the measured performance? Who cares about the HP numbers, if the performance is there? HP numbers can vary depending upon the dyno. Performance times can vary as well, but at least they really speak about something.

[LarThaL]

Originally Posted by -=Hot|Ice=-

No one is saying it's not fast enough. 330 to the rear wheels just sounds anemic. That's why a 335i can take the M3 in a straight line with a tune. Not a huge difference in power. For the street, it's plenty with a couple extra.

A tuned 335 can take an M3 due to the huge swell of midrange torque. You are looking at almost 100 lb-ft more torque in a tuned 335 motor than a stock M3 motor. That's just the advantage of turbos. You want big torque...you need turbos or big displacement.

As far as power goes, the M3 motor is a very highly tuned specimen. It will produce 414 hp given the right fuel, air temps, and humidity. Give it poor fuel, higher air temps and higher humidity and the power falls off.

I went through all this same stuff when I had my Audi RS4 too. For that car to produce it's rated 420 crank hp, it needed air temps of 60 degrees, low humidity and 96 octane fuel. I'm not saying this is what the M3 requires, but I am willing to bet that it is not making 414hp on 91 octane fuel or in 100 degree heat.

[-=Hot|Ice=-]

Originally Posted by VVG

A tuned 335 can take an M3 due to the huge swell of midrange torque. You are looking at almost 100 lb-ft more torque in a tuned 335 motor than a stock M3 motor. That's just the advantage of turbos. You want big torque...you need turbos or big displacement.

As far as power goes, the M3 motor is a very highly tuned specimen. It will produce 414 hp given the right fuel, air temps, and humidity. Give it poor fuel, higher air temps and higher humidity and the power falls off.

I went through all this same stuff when I had my Audi RS4 too. For that car to produce it's rated 420 crank hp, it needed air temps of 60 degrees, low humidity and 96 octane fuel. I'm not saying this is what the M3 requires, but I am willing to bet that it is not making 414hp on 91 octane fuel or in 100 degree heat.

I can't wait for mine.

[sameh]

Don't you think if BMW lied about HP then Audi, AMG or Mustang would have a field day with it??!!!
They test their cars and they can prove it. Whether you can reproduce the sane reading or not depends on ALOT of variables.

[Platfawrm]

Originally Posted by Z K

No two dynos will put out the same numbers. A dyno is a tuning tool, you use it to tune the car. Unless it's the exact same dyno, you can't compare numbers between them.

Ditto.

The dyno we use reads very low.. i.e Stock E92M3 puts down 307whp.