Out of the darkness. Exclusive Top Fuel Dragster power test (2 Viewers)

[The Counterfeiter]

I was able to take a few friends to DSR shop while we were in Indy for the 500. While we were there, they fired up the blower dyne (with no warning). The sound, which is masked by the exhaust of a fuel motor, was incredible! We were also quoted the 1000 hp figure.

 

[FABMAN]

The blower or any thing else driven by crankshaft is going to take power, it's the power gained thats important.

 

[Nunz]

This is pretty simple. Everything that takes power to turn, like a blower, also contributes to making power. So, any HP figures that are produced, are NET figures. As an example, take the blower off of a fuel motor, and while you gain back the 1000hp it took to spin it, you lost 6000 HP (or whatever the number is ) overall.

 

[Mike]

This is pretty simple. Everything that takes power to turn, like a blower, also contributes to making power. So, any HP figures that are produced, are NET figures. As an example, take the blower off of a fuel motor, and while you gain back the 1000hp it took to spin it, you lost 6000 HP (or whatever the number is ) overall.

True, if it contributes to making the power. Water pumps, oil pumps, alternators, etc., do not contribute to making the power and if can be powered otherwise are typically done so. Now in the specific case of dry sump/vacuum pump, it can contribute to making the power. If the gross gain is greater than the individual loss, then it pays to have it.

 

[none]

Those numbers are VERY close to what Pat Hale of Quarter jr. fame came up with doing the math of mass/acceleration/time that was in Dragster a while back. Not a surprise at all, just further confirmation.
AR

Ran across that article today -- pages 42-49 in the August 1, 2014 edition.