Hi All,
As always with dyno days, some cars did well, others very well and some not so well. You will always get cars that make low power, usually the modified cars or cars with 'unknown' remaps, remaps done using self tuning modules, tuning boxes or badly set up cars.
Many cars made standard power that weekend, including the following:
Scirrocco 2.0 tfsi (200 std) made 198bhp
Toledo 1.9 tdi (110 std) made 111bhp
Seat Ibiza 1.9 tdi (130 std) made 131bhp
BMW 530d (193 std) made 189bhp
BMW 330i (231 std) made 228bhp
Dyno accuracy will always be debated, and always by the people that get low figures, however there is usually an underlying problem. Take 2 examples of this on the day I have listed below with an
explanation:Rich's R32 had run 412bhp on our dyno before, it was odd that it dropped to around 350hp. But Rich had been playing with, and subsequently lost his bost screw! Rich booked in for a boost setup on Tuesday this week, after 1.5 hours of testing and setting up the actuator it made 416bhp, more torque and far smoother graph than ever before. Was it the dyno at fault? no, it was a matter of low boost caused by owner error..
The 1.8t (blue with grey wheels) had an issue with low power and not holding boost, not making enough boost. It came back to us this week with a new FMIC and AFM. It gained slight BHP but boost was dropping off very quickly after peaking. The owner then finds that he has little/no boost on the drive home. I tell him to check the vac pipe to actuator, he does this nad finds that his actuator holding nut has vibrated loose and actually fallen off! new nut on, back in today for a check and he has gained around 10 bhp and 40+ ft/lb of torque. There is still an issue with the car holding boost, but that is yet to be fully diagnosed. .
The Lupo 1.6 16v on throttle bodies was down in power by around 20bhp. There was no obvious cause, yet the owner has since let us know that cylinders 2+3 are full of oil, whenever oil is present in a cylinder the engine cannot control combustion and fuel burn correctly, this can cause loss of power by as much as 30% as well as a loss of compression. So all in all there was an explanation to the low figures on the cars that have been investigated. Those that have not been looked at but made low power may need further investigation before they blame the dyno. You cant say that a dyno is innacurate based on a few tests on modified cars, how about the ones that were accurate? were they tested any differently? no, all cars on the day were tested , strapped and run in the exact same way.
.As for the claim that you can simply input a correction factor into a dyno dynamics dyno, this simply isnt true. All cars on the day were run in shootout mode, using this mode all dyni operators inputs are locked out and the compensation figure and any corrections are set by the dyno from Intake temperature, ambient temperature, barometric pressure, humidity and ramp rate. All of these figures are printed at the bottom of your graphs. If you have any concerns regarding the accuracy of your dyno run, feel free to send a copy of your graphs directly to dyno dynamics (
www.dynodynamics.com) and they will be happy to check the compensation and correction factors compensation figures added to your graphs.
.If anyone isnt happy with the way that there car was run, contact us at
sales@pdtuning.com and explain why you werent happy and we will offer you another dyno test or a full refund. Hope this helps,PDtuning