Pontiac Solstice Forum - View Single Post

Quote:

Originally Posted by btlfed1500

Good post ...

One thing to remember is that this infact is a axle dyno and does not take into consideration losses incurred with heavier wheels/tires and different rolling daimeters and contact patch. It also looks as if the dyno was running is inertia mode ... I don't see any load values plugged in or really even if GM has published the power@50 numbers yet for the Sol.

Here is some good reading on this type of dyno: http://www.dynapack.com/dynapack.html

The DynaPack is a good tuning tool and shows excellent repeatability BUT because of its "wheels off" interface make its number hard to compare to any other dyno ... As I have show in another post the wheel and tire weight along can attribute to substantial chages in measured HP.

Here is the thread to entertain more details regarding just how much power is lost in wheels and tires:
How much power do 20" wheels rob ... dyno inside

Now it that much is lost with adding 10-15 lbs / wheel .. imagine how much is gained but removing 45-55 lbs of wheel and tire ... Just something to think about...

Again .. congradulations on the dynos, I just wanted to put somethings into perspective for those who may not be as dyno literate.

A power adder will wake up this platform for sure ... 250-300 rwhp woudl be FUN in not completely thrilling.

Yeah, you're right about this. I asked him the difference between this Dyno and the Drum Dyno, he explained the same to me. This is my first ever Dyno so i was just enjoying the free knowledge. Thanks.

	JT72 Member Join Date: Oct 2005 Location: So Cal	Quote: Originally Posted by btlfed1500 Good post ... One thing to remember is that this infact is a axle dyno and does not take into consideration losses incurred with heavier wheels/tires and different rolling daimeters and contact patch. It also looks as if the dyno was running is inertia mode ... I don't see any load values plugged in or really even if GM has published the power@50 numbers yet for the Sol. Here is some good reading on this type of dyno: http://www.dynapack.com/dynapack.html The DynaPack is a good tuning tool and shows excellent repeatability BUT because of its "wheels off" interface make its number hard to compare to any other dyno ... As I have show in another post the wheel and tire weight along can attribute to substantial chages in measured HP. Here is the thread to entertain more details regarding just how much power is lost in wheels and tires: How much power do 20" wheels rob ... dyno inside Now it that much is lost with adding 10-15 lbs / wheel .. imagine how much is gained but removing 45-55 lbs of wheel and tire ... Just something to think about... Again .. congradulations on the dynos, I just wanted to put somethings into perspective for those who may not be as dyno literate. A power adder will wake up this platform for sure ... 250-300 rwhp woudl be FUN in not completely thrilling. Yeah, you're right about this. I asked him the difference between this Dyno and the Drum Dyno, he explained the same to me. This is my first ever Dyno so i was just enjoying the free knowledge. Thanks.