[Z06] Dyno Numbers?

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Mar 1, 2003 | 10:44 PM

TomsZ06

Thread Starter

Pro

Joined: May 2000

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From: Thonotosassa Florida

Dyno Numbers?

Why are the dyno numbers so much lower than the actual 405 HP stated HP. Is there that much lost from the drivetrain in the amount of 40 to 50 HP?

Mar 1, 2003 | 10:53 PM

Crushinator

Race Director

Joined: Mar 2001

Posts: 14,480

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From: PA

Re: Dyno Numbers? (TomsZ06)

There is about a 15% drivetrain loss. The 405 horse rating is at the flywheel. The dyno numbers you hear are at the wheel. Which is where it counts. I believe most '02 and '03 dyno 360 to the wheels which is roughly 425 to the flywheel.

Mar 2, 2003 | 01:22 PM

01BLKZ06

Instructor

Joined: Jan 2003

Posts: 129

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From: Grand Blanc MI

Re: Dyno Numbers? (Nat97GTS)

remembe, its all about the car too.
I have seen 01 Z06 dyno 350 rwhp with just an exhaust, while seeing 02 Z06's dyno 345 stock.

On average, i think 02's dyno around 350-355, or atleast from what have seen.

Mar 2, 2003 | 01:25 PM

TomsZ06

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Joined: May 2000

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From: Thonotosassa Florida

Re: Dyno Numbers? (01BLKZ06)

Does anybody know what the 03 Cobra's dyno at? Curious to know if they suffer the same HP drivetrain loss as the Z06.

Mar 6, 2003 | 11:10 PM

phrogs

Race Director

Joined: Aug 2000

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From: SW Michigan

Re: Dyno Numbers? (TomsZ06)

FWIW my 2002 made 356 at the rear wheels totaly stock! :thumbs:

johnny

Mar 7, 2003 | 01:58 PM

Mitch Alsup

Racer

Joined: Sep 2002

Posts: 483

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From: Austin Tx

Re: Dyno Numbers? (TomsZ06)

The factory measures the engine output at the back of the engine with all ancilaries SAE HP(water pump, AC, Power steering, CATs, manifolds, muflers,...) or without any of the ancillaries Goss HP (not used since the late 1960's). However, that rolloing wheel dyno measures the ouptut after the clutch, transmission, drive shaft, differential, drive shafts, hub, and wheels. Each of these things looses tiny amounts of energy (that why the get warm while driving around). It is generally agreed that manual tranny drive-lines transmit 85% of the engin power to the rear wheels (15% loss) and autos loose 20%.