I dyno'd my car yesterday...

[smidra]

Just FYI, the results are pretty much as expected, you can see for yourself. Anyone did the same thing so we can compare the EU model?

EDIT: Moving the translation to the first post, sorry for confusing you with our crazy Czech language

From the top of the "Udaje o vykonu" which means power data:
Corrected power (this is bhp at the crank calculated, or engine HP) - this is the main power number, that is 317HP in our brochures. This is red in the graph
Engine power (this should be what was measured, but not adjusted. Useless data)
WHP (the blue one in graph)
Wasted power (that's lost in the transmission and the diff)
Max power at 5285rpm (196.5km/h)
Orange one is obviously torque (M_norm)
Max torque
Max measured rpm's

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[Tommy556]

Hi, what exactly do the different colors mean?

Are those whp or crank hp?

 

[Lord Thunder]

Hi, what exactly do the different colors mean?

Are those whp or crank hp?

I don't really speak Czech, but what I managed to figure out is:

Red graph = total corrected whp (corrected to standard conditions)
Red number = measured whp (at current conditions)
Blue graph = measurement on the rollers?
Green graph = power dissipation
Orange graph = torque

 

[Lsstefan]

300 whp? That's a lot more than stock. Like 40+ more.
Idk if he is tuned or not, but if stock, it's not whp, maybe crank.

 

[Glenn G]

yeah nearly 300 ps and 400 nm at the wheels is Extremely good for a stock car! most people get 260-280! Now that I am full MAP P1.5 I'd love to see what it pulls!

 

[Lsstefan]

deleted due to clearing the confusion.

Nevertheless, the losses compared to brochure are pretty small I reckon, so congrats. There were some that pulled way lower than you. I can't wait to dyno mine.

 

[Gibbo205]

GUYS!

It is a maha dyno, the figures are crank power.

 

[Lord Thunder]

Well how can a stock car do 300 at the wheels? I mean in the brochure we get 310-315 at the crank, right? 300 at the wheels is like 350 at the crank.

Or maybe the brochure says 310 at the wheels?!

In NL they advertise 317hp at the crank. Also: the brochure says it should have a 232kph limiter, has anyone hit that yet? Untamed67 did at least 240 and he reported that he did not hit the limiter.

Edit:

GUYS!

It is a maha dyno, the figures are crank power.

Ah, that would explain. But then it's pretty low, isn't it?

 

[Glenn G]

In NL they advertise 317hp at the crank. Also: the brochure says it should have a 232kph limiter, has anyone hit that yet? Untamed67 did at least 240 and he reported that he did not hit the limiter.

Edit:


Ah, that would explain. But then it's pretty low, isn't it?

it would be a few hp low at the crank but 10-15 hp could be lost due to fuel quality(95 vs 98) or just heat, the stock intercooler does not do well on dynos!

 

[Ericc B]

Michael Schumacher watching also costs a few horsepower.

 

[Lsstefan]

Also that type of dyno loses a lot of power. Best dyno for crank should be a crank dyno ^^
So even if he has 300, he might have 305 true crank or smth.
There's some guys here that bought a dyno that uses the spindle(the thing where the wheel attaches to) for measurement, this way reducing loss from the wheel.

 

[Glenn G]

Also that type of dyno loses a lot of power. Best dyno for crank should be a crank dyno ^^
So even if he has 300, he might have 305 true crank or smth.
There's some guys here that bought a dyno that uses the spindle(the thing where the wheel attaches to) for measurement, this way reducing loss from the wheel.

Yeah they are called hub dynos, and they don't lose any power due to wheel weight or slip

But trying to estimate crank hp from any chassis dyno is just educated guessing really, way too many variables.

Engine dynos are cool and all but a great engine with a crappy driveline is still going to be a dog, Uncorrected Wheel or Hub dynos are the best because that is how much power you put to the road, which is all that matters really.

 

[smidra]

Sorry for creating a confusion guys!

From the top of the "Udaje o vykonu" which means power data:
Corrected power (this is bhp at the crank calculated, or engine HP) - this is the main power number, that is 317HP in our brochures. This is red in the graph)
Engine power (this should be what was measured, but not adjusted. Useless data)
WHP (the blue one in graph)
Wasted power (that's lost in the transmission and the diff)
Max power at 5285rpm (196.5km/h)
Orange one is obviously torque (M_norm)
Max torque
Max measured rpm's

Then there are enviromental parameters. The guy who did the measurement was quite good I guess, actually the Shumacher poster was signed and he had a few pictures there with him and other similar folks, because he used to tune the engines for the Ferrari challenge. He told me that 297HP is pretty normal, you have to consider air humidity, type of fuel. So it is what can be expected.

EDIT: The measurement was done in the 5th gear, that's why the high km/h. The car is bone stock.

 

[Lord Thunder]

Sorry for creating a confusion guys!

He told me that 297HP is pretty normal, you have to consider air humidity, type of fuel. So it is what can be expected.

223 whp means 25% drivetrain loss, 30% if you believe the 317 hp number in the brochure .... ouch?

 

[Gibbo205]

223 whp means 25% drivetrain loss, 30% if you believe the 317 hp number in the brochure .... ouch?

Maha dyno, uses two contact patches, hence the wheel figures are always miles out. What makes maha dyno good is they accurately measure flywheel/crank power by measuring coastdown/drag losses with the rollers.

So if you want wheel figures, use a different dyno and then the operator will just make some numbers up to give you a flywheel figure.

Google maha dyno, too much to explain when it is all on google.

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