Horsepower % lost

[JackG]

Originally Posted by Grizzly

So that's why I go through so many AODs.

No, it's your right foot that's to blame.

[tholyoak]

OK well I really didn't believe that in transplanting my 2.5L engine for my 3.6L X51 motor that it takes 15 more hp to get the power from the crank to the wheels.

I think I found the answer. It turns out that the 15% loss has to do with the rate of acceleration of the large drums on an inertial dyno. On a load control dyno, you assume a constant amount of parasitic drive train loss.

A good explanation can be found here for those that are interested.

http://home.earthlink.net/~spchurch/churchautomotivetesting/id12.html

Todd

[blue2000s]

Originally Posted by tholyoak

OK well I really didn't believe that in transplanting my 2.5L engine for my 3.6L X51 motor that it takes 15 more hp to get the power from the crank to the wheels.

I think I found the answer. It turns out that the 15% loss has to do with the rate of acceleration of the large drums on an inertial dyno. On a load control dyno, you assume a constant amount of parasitic drive train loss.

A good explanation can be found here for those that are interested.

http://home.earthlink.net/~spchurch/churchautomotivetesting/id12.html

Todd

That's accounted for and subtracted out when you get the dyno sheet so it's not part of the loss we're talking about. You're stuck with 15% man.

[rule1]

I pulled 207 HP and 172TQ on Imagine Auto's dyno. I have a 2000 2.7 with EVO intake, headers and exhaust. Heres the ? should I do the GIAC flash or is it worth it? By the 15% I am already getting 243.6 HP to the crank. Will the Ecu flash really ad more?

[edevlin]

"I pulled 207 HP and 172TQ on Imagine Auto's dyno. I have a 2000 2.7 with EVO intake, headers and exhaust. Heres the ? should I do the GIAC flash or is it worth it? By the 15% I am already getting 243.6 HP to the crank. Will the Ecu flash really ad more?"


I picked up about 12 hp when I added a chip to my car.

Ed

Originally Posted by edevlin

"I pulled 207 HP and 172TQ on Imagine Auto's dyno. I have a 2000 2.7 with EVO intake, headers and exhaust. Heres the ? should I do the GIAC flash or is it worth it? By the 15% I am already getting 243.6 HP to the crank. Will the Ecu flash really ad more?"


I picked up about 12 hp when I added a chip to my car.

Ed

Ed, and you decreased your tire-life by 95%!!