Dyno Day

[jsears]

I was driving around yesterday and one of the local performance part places around here was having a dyno day fundraiser to help pay for a kids medical bills, with all of the proceeds going to the kid. Figured since it was going to a good cause that I would strap the X5 to it.

So here's my dyno chart:

[skiboats]

Does that mean you are just touching 300hp by the time it hits the tires?

[StanF18]

Originally Posted by skiboats

Does that mean you are just touching 300hp by the time it hits the tires?

Actually, if I'm reading the graph correctly, the picture is even more sobering than that: look like max whp on the 3 runs was 273....It was the torque that touched 300 ft-lbs, at around 4200 rpm.

On the other hand, you'll see these crankshaft-to-drivetrain losses for just about ANY vehicle, so it's not as bleak as it seems. When talking horsepower, you have to compare apples to apples, not apples to oranges.

Your 4.8is still a beast of an SUV, especially with all the Dinan mods you just threw into it. I think you can easily beat a Cayenne S with your package, and are essentially equal to a Cayenne GTS.

Specs from Porsche website:

Cayenne S = 385 hp @ 6200, 0-60mph = 6.4 sec
Cayenne GTS = 405 hp @ 6500, 0-60mph = 5.7 sec

The BMW company specs on a stock 4.8is are 355 hp (crankshaft), 0-60mph = 5.9 sec.
I would imagine the CAI, exhausts, and throttle body have shaved 1 to 2 tenths off your stock 5.9 time.

There JSears ! Do you feel better now?

[JCL]

Originally Posted by StanF18

Actually, if I'm reading the graph correctly, the picture is even more sobering than that: look like max whp on the 3 runs was 273....It was the torque that touched 300 ft-lbs, at around 4200 rpm.

LOL, I just read 25 or so posts about this 300 rwhp X5, wondering how anybody got that off the printout that clearly showed 274 hp, but you beat me to it.

[N S]

For an AWD vehicle, do they have two sets of dyno rollers measuring at the same time?

[jsears]

Originally Posted by N S

For an AWD vehicle, do they have two sets of dyno rollers measuring at the same time?

There was a front set and a rear set of rollers. How it measures the power output of the car? No idea!

[Weasel]

Yep. You usually lose ~ 25-30% in the drivetrain.

[Wagner]

Originally Posted by Weasel

Yep. You usually lose ~ 25-30% in the drivetrain.

AWD sucks up the power in momentum. Wonder what a 4.4 or worse yet, 3.0 is putting down

[E53is]

Originally Posted by Wagner

AWD sucks up the power in momentum. Wonder what a 4.4 or worse yet, 3.0 is putting down

oh jesus dont say that

[realchef]

Originally Posted by Wagner

Wonder what a 4.4 or worse yet, 3.0 is putting down

Me and my 4.4 made it to Taos in 49 minutes effortlessly. Usually takes 1hr 20 minutes. A/C on, listening to Big Bill Broonzy with passenger and cargo. That's enough for me.

Like to see a GT500 do that.