17469 views

0 Members and 1 Guest are viewing this topic.


Offline YSS


  • Joined: Apr 2006

  • Location: Adelaide
Well i need some help reading some dyno results
Car has just had an ECU flash

Humidity and temp noted as follows:
Pre ECU flash -15 degrees C, Air density 99.3%
Post Flash - 16 degrees C, Air density 99.7%
Both runs in 3rd gear
Runs were on a DynoLog 4WD Dyno.

if the drivetrain loss is 20%, the car would have had 523 hp and 920 NM (419HP and 735NM at the wheels).
Post ECU Flash, the car has 596 HP and 990 NM of torque (478 HP and 792NM at the wheels).  Motive force of 13877N v 12933N before.

Now the overall numbers are huge.
Techart claimed a 59 KW increase at the engine and a 130NM increase (to 580HP ad 830NM).
Now my car did not get those increases but the overall numbers are larger than expected assuming i have a 20% drivetrain loss.

The torque numbers look too big.  The car is very quick for its weight and numerous tests have seen it record high 11's for the quarter mile.  Perhaps its all in the torque.

am i reading this dyno correctly?
what drive train loss would you expect?

calling the dyno experts..

YSS



Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
Wiki says they should only ( :tilt: ) have ~700NM as standard...

actual power train loss is impossible to calculate, also tyre temp has a lot to do with it, and the way the car is tied down makes a big difference to friction losses.

Even silly things like climate control will affect dyno results.




Offline YSS


  • Joined: Apr 2006

  • Location: Adelaide
Wiki says they should only ( :tilt: ) have ~700NM as standard...

actual power train loss is impossible to calculate, also tyre temp has a lot to do with it, and the way the car is tied down makes a big difference to friction losses.

Even silly things like climate control will affect dyno results.

understand
can you draw any solid conclusion from the dyno results?

eg, the absolute number being comparable to what they should have or the change before and after?
is there a range of drive train loss?



Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
understand
can you draw any solid conclusion from the dyno results?

eg, the absolute number being comparable to what they should have or the change before and after?
is there a range of drive train loss?

conclusions... you are now capable of going fast, really fast  :tilt:

dyno claims are just claims, you're either happy with the job or not. If not, get it removed.

I'm not sure how Panamera trans works.. is it auto slush box with torque converter, or dsg style system??

Auto/slush can take 40% easy, efficient clutched manuals can take only 12%, normal clutched manuals yeah ~15-20%.

But it depends on tyres, oil, ratio, age, condition, strapping, test conditions etc etc etc



Offline M308

  • Degranged

  • Joined: Aug 2008

  • Location: Adelaide
  • Name: Scott Thomson

523 hp and 920 NM flywheel                 (419HP and 735NM at the wheels).
596 HP and 990 NM flywheel                 (523 HP and 792NM at the wheels). 


Are these figures correct?
If the rear wheel figures are what you are going from before & after the tune, that is an absolutely HUGE power increase :eek:
523hp at the wheels should be closer to 650hp at the engine!
That is over a 100hp at the wheels increase.....very impresive.
The torque on the other hand, is not a huge increase but more than enough for the street. Torque is the increase you want :thumbsup:



Offline YSS


  • Joined: Apr 2006

  • Location: Adelaide
conclusions... you are now capable of going fast, really fast  :tilt:

dyno claims are just claims, you're either happy with the job or not. If not, get it removed.

I'm not sure how Panamera trans works.. is it auto slush box with torque converter, or dsg style system??

Auto/slush can take 40% easy, efficient clutched manuals can take only 12%, normal clutched manuals yeah ~15-20%.


But it depends on tyres, oil, ratio, age, condition, strapping, test conditions etc etc etc

PDK = DSG type



Offline YSS


  • Joined: Apr 2006

  • Location: Adelaide
Are these figures correct?
If the rear wheel figures are what you are going from before & after the tune, that is an absolutely HUGE power increase :eek:
523hp at the wheels should be closer to 650hp at the engine!
That is over a 100hp at the wheels increase.....very impresive.
The torque on the other hand, is not a huge increase but more than enough for the street. Torque is the increase you want :thumbsup:

i made a mistake

478 RWHP after
419 before




Offline YSS


  • Joined: Apr 2006

  • Location: Adelaide
Are these figures correct?
If the rear wheel figures are what you are going from before & after the tune, that is an absolutely HUGE power increase :eek:
523hp at the wheels should be closer to 650hp at the engine!
That is over a 100hp at the wheels increase.....very impresive.
The torque on the other hand, is not a huge increase but more than enough for the street. Torque is the increase you want :thumbsup:

the torque figures are correct
just checked again



Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
PDK = DSG type

ah ok, well it's super efficient then... certainly not 20% loss, but again, it depends on the gear ratios and a gazillion other things...

runs were in 3rd gear, makes the losses less too.



Offline M308

  • Degranged

  • Joined: Aug 2008

  • Location: Adelaide
  • Name: Scott Thomson
i made a mistake

478 RWHP after
419 before

Still.......very impresive increase!
The only question that needs to be asked......can you feel the increase????
If so, that's all that matters.....if not, as Phil said, take it back.



Related Topics

  Subject / Started by Replies Last post
0 Replies
1122 Views
Last post Sun, 10 Jan, 2010 - 07:37
by trev0006
2 Replies
2974 Views
Last post Sun, 01 Aug, 2010 - 23:02
by Wattens
5 Replies
2397 Views
Last post Mon, 05 Aug, 2013 - 00:25
by MikeG
2 Replies
1385 Views
Last post Mon, 31 Mar, 2014 - 20:32
by NSX
4 Replies
795 Views
Last post Fri, 29 Jul, 2016 - 12:31
by PA


Latest Discussions

BOARD TOPIC MEMBER POSTED
[ Funny Cool Stoopid ] it's funny cause i'm drunk!! anotherforumuser Today at 00:33
[ Cars ] Maserati - The only Assetto Corsa in Australia ? EZ95 Yesterday at 20:27
[ Off Topic ] Real Estate allanuber Yesterday at 19:46
[ Off Topic ] Music Fil-Ski Yesterday at 19:35
[ Cars ] Underground Parking at Home Joel Yesterday at 17:45
[ Cars ] Stolen R8 dodger Yesterday at 10:56
[ Porsche ] Porsche 991 GT3 NBTBRV8 Yesterday at 10:46