SRT vs. Z06 Dyno results

[Vipermann]

Well, i did a little digging to answer my own question.

While most stock SRT-10s typically dyno around 435-438 rwhp (and much higher torque) ... here were some stock Z06 numbers that I found on another forum:

"(forum vender) called me today with my dyno #'s before all the mods they are doing over the next week. RWHP was 457 (max at 6400) and RWTQ was 429 (max at 4800). I think they are good #'s, but let's see what happens next week."

Now granted I don't know what kind of dyno that was, but other posts said 450+ rwhp was typical for a stock Z06. That equates to about 525+ HP at the crank.

... So, a couple of things: First, GM clearly low-balled the claimed HP on the Z06 (wake up DC). Second given the claimed relative crank HP (505 vs. 510), it would seem that the SRT-10 is losing more in the drive-train (i.e. too much rotational mass).

 

[GR8_ASP]

I would have guessed 445 hp as the average from those I have seen or heard of for the SRT.

 

[Vipermann]

I would have guessed 445 hp as the average from those I have seen or heard of for the SRT.

... might vary based upon dyno equipment

 

[GR8_ASP]

Absolutely. I am assuming this is a Dynojet based assessment.

Something that may play in this is the HEAVY wheels and tires on the SRT, which reduce the measured hp on a Dynojet. More drivetrain inertia = lower measured performance on a Dynojet.

I would also assume that the engine hp numbers for each are accurate as both were 3rd party certified.

 

[opnwide]

GR8 ASP is right. The HP numbers were all reverified according to the new testing requirements. The difference must be attributed to either a funky dyno or the drivetrain on the ZO6s is crazy-light.