Its 5250 actually.. and yeah.. looks like it does... Pay attention to the side bar too, not just the graph.

Funny how everyone thinks its off cause the graph doesnt cross at 5250 when the power does cross.

 

Here is my girlfriends Cobalt SS/SC dyno. Run .001 was in 4th gear, and Run .003 was in 3rd.

 

PWNED!!!

 

They do meet at that rpm, however that graph is displaying the tq and hp on different ranges, that's why it doesn't cross where it should. If the chart had both hp and tq on a 0-250 scale (or something similar), they would meet at exactly 5252 rpm, as you say.

 

my 3rd and 4th gear pulls had like a 2hp difference

 

Good numbers, I dynoed my car 4 times, twice in 3rd and I hit 222 at the wheels, and twice in 4th and I was at 220 at the wheels, so you do gain a little bit in 3rd gear I have seen

 

Dynopack connects to the hub, so its gonna read higher than a dynojet or mustang dyno where you're running on the wheels. I mean think about it you've eliminated atleast 50% of your rotating mass by taking the wheels off. A dynopack reading is going to give you higher hp reading than at the wheels but slightly lower than what it is at the crank.


Rotating mass=

 

i doubt the wheels rob that much HP, id be willing to say up to 10HP at most, which would still give me 226 WHP. But even that is questionable. Once those wheels get spinning its not that hard to keep them spinning. A car is going to have a hard time getting the wheels to spin at say 100MPH, but once they are spinning that fast its not hard to keep them spinning that fast. Momentum is the key. Think of a mary-go-round at a playground. Load it up with kids and start spinning it, its very hard to get moving at first, but once it starts to pick up speed it becomes alot easier to spin.

The majority of drivetrain power loss is through the engine and trans, not the wheels.