When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi guys, I strapped my car down last week and did some pulls to see where it was at on the Dynojet. On one of the runs, we forgot to put the car into Sport +...it was interesting to see the results for the car in Normal mode vs Sport plus...
As you can see by the graphs above-there is only a 3whp peak difference-but there is a slight difference at various points on the graph-as much as 11+ hp at one point. In the end, it does make a difference-but its not detrimental at WOT IMO
Hi guys, I strapped my car down last week and did some pulls to see where it was at on the Dynojet. On one of the runs, we forgot to put the car into Sport +...it was interesting to see the results for the car in Normal mode vs Sport plus...
IMO the variance is between those two pulls is based upon the dyno operator (accelerator pedal input), Since the load from a dynojet is pretty much static, I would not expect to see much of a variance between normal and sport plus modes.
Perform the same test as a time/distance with a GPS accelerometer and the story may be much different.
Here is another interesting one where we did a pull with no cool down time vs a full 20 min cool down. For comparison iats started at around 134 degrees and climbed to almost 170 on the lower run vs starting around 110 degrees and ending around 140 for the higher run.
People have a misconception about the sport button and engine power. It does NOT increase the engine power at all. It changes the interaction between the throttle pedal and the engine throttle. For a given pedal input the engine throttle will open sooner with sport mode selected. This makes the car “feel” more responsive. But at WOT it is the same.
I figured the same-I have read so many different theories on why and how you must dyno your car in Sport+, etc and many people claimed inaccurate dyno results for those dynoing in Normal-I am glad there is some data to put some numbers behind it now.
40+ whp difference peak to peak and 47+whp difference up top! Sure makes a point for better intercoolers when airflow is lacking...
What are the timing and fueling logs showing? It would be interesting to correlate the correction factors to the IAT. I'm pretty confident APR has a good handle on this. Unfortunately the 991.2 is severely handicapped for airflow when on the dyno.
People have a misconception about the sport button and engine power. It does NOT increase the engine power at all. It changes the interaction between the throttle pedal and the engine throttle. For a given pedal input the engine throttle will open sooner with sport mode selected. This makes the car “feel” more responsive. But at WOT it is the same.
I'm a little confused about "does NOT increase the engine power at all." I have a 2019 T and when I switch to Sport + mode there is added boost, shows up on the gauge, and seems to produce way more power. Is this a trick?
I'm a little confused about "does NOT increase the engine power at all." I have a 2019 T and when I switch to Sport + mode there is added boost, shows up on the gauge, and seems to produce way more power. Is this a trick?
I don’t know the answer when talking about the turbocharged cars. My answer is correct about the 997 and 991 NA cars. I think on the 997.2 Turbo the button provided for “overboost” for a number of seconds. That definitely did increase ,power. So maybe on the 991.2 does too?
I'm a little confused about "does NOT increase the engine power at all." I have a 2019 T and when I switch to Sport + mode there is added boost, shows up on the gauge, and seems to produce way more power. Is this a trick?
This is mostly the sound of the pse opening up...pretty sure boost will remain the same.
05-13-2020, 06:19 PM
Dyno differences between sport+ and normal
