[npirnia]

Originally Posted by Blue Angel

Wow, that’s damn near dead on my ‘02 ZO6 too. GM’s official rating was 3.9 0-60, 12.4 @ 116 (I measured 12.2 @ 118 on the street, 11.8 @ 118 at the strip), 175 MPH top speed. ~365 WHP (rated 405), 3116 lbs curb weight.

That’s plenty of car, and being RWD it will be a handful without good tires.

I really loved the C5 Z06! I didn't have the pleasure of owning one, but drove one on several occasions (I had a regular 98 C5 for several years). That generation of Z06 had a wonderful frenetic energy that made it really fun to drive and it felt a bit quicker than the numbers would suggest.

Its a shame that the C5 interior ages like a carton of milk, but the rest of the car was pretty epic for the time period.

-Nick

[02M3ForMe]

Originally Posted by jdubm2c

But there is no bonus. The car is not any faster than it was before the measurement. You can have the fastest 450hp car or the slowest 500hp car, but the car’s speed does change.

The measurements explain why the car is faster than expected and confirm the bonus.

[Blue Angel]

Originally Posted by npirnia

I really loved the C5 Z06! I didn't have the pleasure of owning one, but drove one on several occasions (I had a regular 98 C5 for several years). That generation of Z06 had a wonderful frenetic energy that made it really fun to drive and it felt a bit quicker than the numbers would suggest.

Its a shame that the C5 interior ages like a carton of milk, but the rest of the car was pretty epic for the time period.

-Nick

Lol, agreed! Second day I had it I got into a roll with a new 911 Turbo and pulled on him, my buddy in the passenger seat thought that was pretty incredible. Back then there wasn’t much on sale that could beat it. How times change!

Looking forward to getting it back on the road, it’s been in storage for a few years while we’re building our new house.

[Ratcher]

Originally Posted by 02M3ForMe

The measurements explain why the car is faster than expected and confirm the bonus.

Is it though?

Originally Posted by Bumpinjeep

477.68 + 10% = 525.45
477.68 + 15% = 549.33

G87 + S58 + Manual = ��‍��

It may very well be the slowest 550hp car ever made. Or even 525hp.

I know it's all part of the hype, but just look at the M3/4C. There have been numerous 60-130 mph/100-200 kph measurements, we know the car is fast, but its not 15% above mentioned power fast, by a long shot.

[burnsniper]

In other news… water is wet.

[stashstein]

Fuck the guy doing 0-60 and 60-130 runs on public roads, especially on a neighborhood street.

[Bumpinjeep]

Originally Posted by Ratcher

It may very well be the slowest 550hp car ever made. Or even 525hp.

I know it's all part of the hype, but just look at the M3/4C. There have been numerous 60-130 mph/100-200 kph measurements, we know the car is fast, but its not 15% above mentioned power fast, by a long shot.

Yes, because 11.8 at 120.3 is somehow slow and not indicative of a 500+ hp car. 🙄
What are you talking about?
https://www.motortrend.com/reviews/2...t-test-review/

[E63M6_G42M240i]

I’d like to point out all of these dyno tests are done on a treadmill which is another step removed from what the car will actually do on the street. But hey, I get it Dynojets will give you inflated values (vs. load bearing dynos), so it looks cool. If you want to know how much power it’s utilizing you use trap speed or if you can’t run that, use a Mustang load bearing dyno. My guess is the M2 is a 420 whp car on a Mustang dyno.

[Squidget]

Originally Posted by stashstein

Fuck the guy doing 0-60 and 60-130 runs on public roads, especially on a neighborhood street.

0-60 is whatever, but I would never EVER do triple digits on anything other than a deserted farm road. A road I knew well, and had walked recently.

Measured real-world performance, the actual track times and measured drag runs we've seen, seem to be perfectly fine.

[stashstein]

0-60 on a narrow street that is a 25mph zone, 30 at best? Screw that. If someone was doing that in my neighborhood, I'd be on the phone with the cops.

Way too easy to cause property damage at a minimum or run someone over, like the tons of kids in my neighborhood.

People like that give the rest of us a bad rap. If you can afford an M car, you can afford the track day. Doing this on public roads for some clicks is a dick move.

[JMcLellan]

Originally Posted by stashstein

Fuck the guy doing 0-60 and 60-130 runs on public roads, especially on a neighborhood street.

100% agreed. And eff Dragy, and other things/people, for using the 60 to 130MPH as a standard measurement for acceleration performance. There are so many other ways (that are safer and legal) to determine how fast your car is.

There is a young dude who drives an Audi s5 around town. He is always ripping around trying to race people. A couple weeks ago I was walking my dog on a parkway road that loops around a lake which is a 30 MPH road. He drops it into 2nd gear and proceeds to do a pull through 3rd gear probably hitting 80 MPH. I was fuming mad.

[baron95]

Originally Posted by npirnia

More importantly, the performance of the M2 strongly reinforces a crank horsepower rating above BMW's claimed 453.

The attached image is Car & Driver's test of a 6MT 2023 M2. The performance is very impressive for a manual car that weights 3745 lbs and a power-to-weight ration of 8.3 lbs/hp.

There aren't many other 6Mt (or 7MT) cars to compare to these days,

You actually missed the most obvious comparison:

Camaro SS 1LE, 6M, weight is 3,747 lbs (2 lbs, less than 1KG difference), HP=455 (2HP more), identical power to weight, wheelbase less than 2 in difference, nearly identical weight distribution F/R.

https://www.caranddriver.com/reviews...d-test-review/

1LE: 1/4 mile = 12.4 @116MPH vs 12.2 @118MPH, rolling start 5-60MPH = 4.6 sec

G87: 1/4 mile = 12.2 @118MPH vs 12.2 @118MPH, rolling start 5-60MPH = 4.6 sec

That is exactly the result I'd expect testing a turbo (more area under the curve) vs a NA car with nearly identical weight and HP. (not to mention day to day track variations)

Moral of the story, neither car in "underrated" per se, but SAE/ISO and manufacturers tend to certify the engines as HP -0% +5% (sometimes 2.5%). They never want to be under and may be over by 5%.

Anyone knows how to use a dyno for development knows that they can only be used for comparisons of before/after mods/tuning, preferably on the same day. They are good for comparisons, not to determine actual exact HP.