First Dyno Ever

[airmaxon1]

Hey guys, will have my slips up soon but needed to ask a question.
my 99' Trans Am A4 posted 300.70 rwhp, all i have is intake, is this about what i should have? Also, what would that be at the crank just out of curiousity. Thanks guys.

[hoss 2000 z-28]

That looks right to me. A4's typically dyno between 290-300whp in stock form so yours is on the higher end. I would not think an intake would give more than 10whp regardless of manufacturer claims, but that's just me.

Considering a typical auto drivetrain loss of 20% you could say your Brake Horsepower:
(300.70WHP * .20 Loss) = 60.14 Lost HP + 300.70WHP = 360.84 Crank HP.
That's the way I figure it, could be wrong however.

I found a technical yet readable explanation of HP and TQ in terms of drivetrain loss:
http://www.superstang.com/horsepower.htm

Of course nobody on here tosses around Brake Horsepower numbers but there ya go.

[Rikki_SeVeN]

That looks right to me. A4's typically dyno between 290-300whp in stock form so yours is on the higher end. I would not think an intake would give more than 10whp regardless of manufacturer claims, but that's just me.

Considering a typical auto drivetrain loss of 20% you could say your Brake Horsepower:
(300.70WHP * .20 Loss) = 60.14 Lost HP + 300.70WHP = 360.84 Crank HP.
That's the way I figure it, could be wrong however.

I found a technical yet readable explanation of HP and TQ in terms of drivetrain loss:
http://www.superstang.com/horsepower.htm

Of course nobody on here tosses around Brake Horsepower numbers but there ya go.

Nice info... and Nice Dyno #'s to the Original Poster!

I'm hopping to go back and run similar numbers with similar mods... A4... last time I went with a really bad missfire it did a 275whp... hoping for more now

[airmaxon1]

That looks right to me. A4's typically dyno between 290-300whp in stock form so yours is on the higher end. I would not think an intake would give more than 10whp regardless of manufacturer claims, but that's just me.

Considering a typical auto drivetrain loss of 20% you could say your Brake Horsepower:
(300.70WHP * .20 Loss) = 60.14 Lost HP + 300.70WHP = 360.84 Crank HP.
That's the way I figure it, could be wrong however.

I found a technical yet readable explanation of HP and TQ in terms of drivetrain loss:
http://www.superstang.com/horsepower.htm

Of course nobody on here tosses around Brake Horsepower numbers but there ya go.

awesome info, thanks alot!
and thanks rikki, yeah im hopin to start doin some real mods pretty soon here so im at a pretty good baseline.