This morning I had the Dynorun with the people from the Dutch Autoweek car magazine.
The guys were very friendly and also very interested in the NSX.
I told them about the modifications I have made to the car, of which, for the dynorun, the intake scoop, UNI-filter, Taitec headers and GTLW exhaust were the most interesting of course.
And naturally, I was very curious to see the results.
I have driven the car on 98 Octane gas for the last two weeks, cleaned the UNI airfilter, checked the oil, check the tire-pressure, run a bottle of injector cleaner through the car and then it was up to the NSX itself.
The results were VERY surprising.
I had told the guys from Autoweek (and the guy from the tuner shop) that standard output for the '98 NSX is 280 HP (in Europe) and that I expected a bit more than that because of my modifications.
The previous owner had a dyno done when the car was still stock and the results then was 285 HP at the dyno. So, I expected perhaps 20-22 HP more than that.
The result: An amazing 355 HP AT THE ENGINE !! :biggrin:
Of course, I was a bit surprised. This was not a Dynojet type of dyno, but one with an internal brake which is able to measure the engine power. This kind of dyno is fairly typical in Europe but usually, these also lower results than a Dynojet.
Of course, I expressed my surprise about the unexpected results and left a very happy guy. Never said anything about the results, except to a close NSX friend who was there for mental support.
I have asked for and received the raw data from the run and have taken a close look in it. It turns out that the shop uses a conversion factor of 1.36 for kWh to HP and 1.25 to convert raw Wheel HP to Engine HP which is a bit high for the NSX.
So, I have recalculated the results using the often used 12% power loss ratio for the NSX.
Even then, the results are still very healthy with 286 WHP / 323 Engine HP at 7000 rpm.
Here is a picture of the graph:
When I left, some other cars (they were doing 7 cars in a row) had already arrived. I am interested to learn how they will perform on this same dyno.
For your information, Autoweek car magazine has done a number of these dyno runs in the last year and usually, the cars they test are showing lower numbers than the official claimed output. For example, a F430 Spider F1 had 450 HP instead of the offical 490 HP.
So, what do you guys think?