backdraft408

408 made 520rwhp. wanna know how much hp is at the fly.

Avaric3

iTrader: (3)

a4 or m6? a4 is roughly 18-20% drivetrain loss and m6 is roughly 15%

backdraft408

its through a m6 with s60 rear end and 4:10s

Avaric3

iTrader: (3)

roughly 635hp assuming a ~17% drivetrain loss

backdraft408

Im hoping with the final tune i can squeeze another 20 out pf it thx for the information!

bww3588

iTrader: (49)

Keep in mind, this is all roughly estimated. As rpm's and speed increase, parasitic loss will increase. Only real way to know would be to strap it to an engine dyno, unless you know exact coefficient of friction for every wear component and it's non linear relationship with speed and rpm, its nearly impossible.

RezinTexas

Friction is a function of normal load applied, and is not related to speed. It is fairly linear, even in drivetrain loss. Here is a graph to show the difference from a BMW M5 engine and chassis dyno.

Mazzenger

iTrader: (5)

Where did you take it to get it tuned. You got that together fast.

FU_I_AM_UltraZ

iTrader: (20)

From what I've read and calculated, my guess with m6 is 12-13% drivetrain loss. I think it's fairly accurate. for A4s I'd say around 16 or 17% The 4L60E trannies don't eat up power as much as A3s do and most ppl get 18% from a 350 tranny and 20$from a 400 tranny. 400s are more beefier so you lose a little bit more compared to a 350 tranny.Modern-wise, 4L60Es not so much as A3s.

Exidous

iTrader: (11)

Whats with the saw tooth on the M5 motor? Is that a variable cam thing?