Dyno Graphs for over 500 cars...

Bent8 · 08-12-2007, 05:50 PM

No Aussie Falcons but it's got the GT500, Porsche 911, M3, M5 etc...

http://www.rototestinstitute.org/index.php?DN=29

paddy351 · 08-12-2007, 06:00 PM

Thats cool, gives you a good benchmark.

Disciple · 08-12-2007, 06:00 PM

Sorry dude, but dyno numbers are about as reliable as the weather.

Werd. · 08-12-2007, 06:30 PM

Quote:

Originally Posted by Disciple

Sorry dude, but dyno numbers are about as reliable as the weather.

obviously dynos differ alot. But i don't see them being out by more than 10kw.
Fair enough, the only way to make it accurate would be to use the same dyno, but thats impossible.

Btw, ROFL at cummins new wheels thread :P

Disciple · 08-12-2007, 07:14 PM

Quote:

Originally Posted by Werd.

obviously dynos differ alot. But i don't see them being out by more than 10kw.
Fair enough, the only way to make it accurate would be to use the same dyno, but thats impossible.

Btw, ROFL at cummins new wheels thread :P

Dynos can be out by a LONG way. Same dyno, same day different settings in dyno can be anywhere up to 30-40kW difference. MPH down the quarter tells the real story.

ardei · 09-12-2007, 12:27 AM

It's not about the numbers though. That site is useful in studying the power/torque graphs as opposed to reading misleading specs from a brochure.

sprjenkins · 10-12-2007, 02:02 PM

I'm wondering how all these cars have roughly 10% drivetrain losses and an AU Falcon will have 25-30% drivetrain loss

sprjenkins · 10-12-2007, 02:08 PM

it was also very interesting to see the Mazda MPS figures. Having lined up against a couple of them, I always thought they were very quick for only 190kw.

xbgs351 · 10-12-2007, 03:45 PM

Quote:

Originally Posted by Disciple

Dynos can be out by a LONG way. Same dyno, same day different settings in dyno can be anywhere up to 30-40kW difference. MPH down the quarter tells the real story.

No it doesn't.

Disciple · 10-12-2007, 04:55 PM

Quote:

Originally Posted by xbgs351

No it doesn't.

Care to elaborate? MPH down the quarter mile is a lot better indicator of true power in reference to cars of the same kind than any type of dyno, unless the dyno was done to all cars back to back on the same dyno, same day and same conditions.

GS608 · 10-12-2007, 06:31 PM

a lighter car with less HP can do the quarter quicker than a heavier car with more HP, if we were to use your theory then the smaller (lighter) car would have more HP..which is wrong..

Disciple · 10-12-2007, 06:34 PM

Quote:

Originally Posted by XR-CHIEF

a lighter car with less HP can do the quarter quicker than a heavier car with more HP, if we were to use your theory then the smaller (lighter) car would have more HP..which is wrong..

I don't think you read what I typed. I said it's a good indicator when compared to cars of the same kind, which now I think about it doesn't hold much weight in reference to a bunch of different cars being dynod. I spose it's a decent indicator to what a particular car is putting out at the wheels, but definitely not gospel.

GS608 · 10-12-2007, 06:42 PM

yeah sorry i just glanced over your post, didnt read it properly, you're right in what your saying about cars of the same kind, but they still have their own characteristics that might give them an advantage. suppose we just have to believe what the manufacturer says.

xbgs351 · 11-12-2007, 09:30 AM

Quote:

Originally Posted by Disciple

Care to elaborate? MPH down the quarter mile is a lot better indicator of true power in reference to cars of the same kind than any type of dyno, unless the dyno was done to all cars back to back on the same dyno, same day and same conditions.

Same logic applies to the drag strip. Unless they are done with the same car with the same driver, done back to back on the same strip on the same day with the same conditions you won't get the same results. Even then you don't know the "true power". To get that you would need to calculate out how much friction and air resistance there was as well as the cars weight etc etc. What if you have a car that is not suitable for drag racing? What if you are trying to maximise torque in a certain rev range? What if you wish to analyse the exhaust gas mixtures and temperatures? How about keep an ear out for knocking? A drag strip would be of little benefit in these sort of circumstances.