Subaru BRZ Prototype Review by Car and Driver. Calls it a Knockout.

[Dave-ROR]

Originally Posted by MatadorRacing_F1

This thread is now about dynos.

I like turtles.

[Matador]

Originally Posted by Dave-ROR

I like turtles.

Turtle on a dino

[MannyO]

[keiri]

This place is better than most forums' Off-Topic lounges.

[dalli]

im 12, what is this?

[Deslock]

Originally Posted by suprachica79

I read that directly from a dyno chart of a stock s2000...

What's printed on the chart is not wheel torque, rather it's engine torque minus system losses (which can be calculated from wheel force * velocity / engine speed).

At 4000 RPM in 1st gear, an AP1 S2k's wheel torque is around 1630 ftlbs. In 6th gear it's around 420 ftlbs. At 6500 RPM, those numbers are around 1940 ftlbs and 500 ftlbs.

Originally Posted by balance

Due to my limited Japanese, I was not able to comprehend the article in full

{snip}

don't remember the yen price

{snip}

sorry, didn't have much time to read and memorize the article as the flight time was approaching

Two words: camera phone

Just kidding, thanks for posting all that. Not surprisingly, the reported numbers are all over the place. Hopefully, that japanese mag ends up being more accurate than C&D.

[Dave-ROR]

Originally Posted by MatadorRacing_F1

Turtle on a dino

/thread.

[suprachica79]

Originally Posted by Dave-ROR

/thread.

Let's be honest Dave, this thread ended pages ago.

[Geard]

I cant wait to see when we actualy have tech to talk about and diy threads, a oilcooler diy thread is gonna turn into how to cook a turkey dinner....

[Marrk]

Originally Posted by Geard

I cant wait to see when we actualy have tech to talk about and diy threads, a oilcooler diy thread is gonna turn into how to cook a turkey dinner....

I like turkey.

[Tyandriel]

Originally Posted by C4RBON

I'm pretty sure some dynos apply real load to the wheels. What you're talking about is using the inertia as the load. There would be a nightmare's worth of assumptions and correction factors necessary to get meaningful results... *snip*

yep, you´re right, I have to admit. There are different types of dynos. But loading or inertia is irrelevant, from the mathematical point of view. They differ in the types of variables and measured values. If the numbers are "true", both should spit out the same result.
The loading ones deliver the more exact results in reality, yes. Because more assumed/determined values are measurable ones here. An inertia one with a 60ft diameter roll would deliver reliable results, too, because the relevance of the assumed values is lower.

And the most/nearly all dynos you see on shows or meetings or at the tuner store around the corner are the inertia ones. They´re good enough to test a difference before and after tuning a car at a reasonable pricetag. And to have some nice numbers to show your friends.
That´s also why you often find big differences between the measurements of a car from 3 different dynos.

As Dave said: the "good"/loading dynos show low numbers. Mostly, because the operator is a real Pro and not interested in giving you a tweaked sheet for your smile and if I see bare numbers from a dyno run I don´t believe anything without a look on the graphs.
Nevertheless: all of these dynos work with factors to consider the powertrain. And the result may vary according to these.
A real powersheet of your engine is only measurable on an engine dyno.

[Abflug]

wtf...

[blur]

Originally Posted by Geard

I cant wait to see when we actualy have tech to talk about and diy threads, a oilcooler diy thread is gonna turn into how to cook a turkey dinner....

The ironic thing is Ive never seen anyone use this smiley



I guess saying we like to go on tangents is an understatement lol.

[Marrk]

It wouldn't be so bad, but it is so f.-ing boring.

Just sayin'.