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Howdy fellow Corvette enthusiasts and owners.
I purchased a new 2016 z06 (non-z07) vette last week, and took to dyno day today. The car had 482 miles on it before the dyno runs were performed, and these dyno runs were the FIRST full power runs which were ever performed on this car (I had been babying it during the break in period).
After doing several searches I expected around 550 hp/550tq with the A8 car, but was pretty disappointed with what i actually got.
Weather info: 70 degrees, Bar.Press 1021, Humidity 58%, Altitude 735' (running 93 octane unleaded)
Dyno: Dynojet Research
First pull the car "seemed to lag" and pulled 443HP/573TQ.
(yes, only four hundred ad forty three HP)
Second pull 518HP/543TQ,
Last pull 516HP/546TQ
The Dyno operator said that it acted as though it was "Heat Soaked" and that euro cars that had done this needed a water pump that pumped the water through the intercoolers.
FYI the engine temp was around 201 degrees and the trans temp was around 199 degrees. They had 3 fans blowing air into the grille area before and during all runs.
What's going on here?
Shouldn't we expect more stock from this car?
How is this problem fixed? (prefer not to tune)
thanks, Andy
Last edited by ACS55; 10-29-2016 at 03:28 PM.
Reason: edited to add fuel information
Yes; this A8 car is extremely disappointing. GM should shoot themselves in the head for putting out such garbage. We buyers have to mod them right off the lot to get respectable performance out of them.
However, your numbers do appear abnormally low. Most venders are getting 525/550 easily from this turd. Add a Halltech Stage 1 and a borla x-pipe and it will wake the car up (+ rwhp). No tune required unless you decide to add headers.
I have no idea why people get so caught up in dyno numbers. There's so many factors that go into a dyno run. I don't see how a car with 650 horsepower and torque is a slow. It's one of the fastest cars on the road course straight from the factory.
Yes; this A8 car is extremely disappointing. GM should shoot themselves in the head for putting out such garbage. We buyers have to mod them right off the lot to get respectable performance out of them.
However, your numbers do appear abnormally low. Most venders are getting 525/550 easily from this turd. Add a Halltech Stage 1 and a borla x-pipe and it will wake the car up (+ rwhp). No tune required unless you decide to add headers.
Last edited by Speedforhire; 10-29-2016 at 03:43 PM.
Did you clear 500 miles before any of the pulls? At 500 the ECU removes the rev warnings on the tach and my cars personality changed like nothing i could imagine. I know there is mixed opinions and little fact out there if the tune pre-500 is different, but from my perspective it sure was. Just turned 770 miles today and rip roarin around way better still than the first 500......
Did you clear 500 miles before any of the pulls? At 500 the ECU removes the rev warnings on the tach and my cars personality changed like nothing i could imagine. I know there is mixed opinions and little fact out there if the tune pre-500 is different, but from my perspective it sure was. Just turned 770 miles today and rip roarin around way better still than the first 500......
Tuning with HPTuners here and havent found anything to indicate power limits........only the dash indicator that i have found.
The reason I ask about the gear used is because the M7 and A8 will not dyno equal numbers even though both engines may make equal power.
The M7 has a rearend ratio 3:42, 4th gear is 1:1 (the ideal gear for dyno pull. At redline in 4th the car will be at/around155mph
the A8 has rearend 2:41 ratio, 6th gear is 1:1, at redline the car is over 200mph.
Few Dynos will to 200mph, so sometimes operators put the A8 cars in 5th gear to make the pull to redline or uses 6th but stop short of 200mph.
Point is don't get to hung-up on your numbers.
Mine dynoed at one shop at 580rwhp,
at another 520rwhp
No, I did not clear the 500 mile barrier before the dyno pulls.
it was around 470-480 miles at the time of the Dyno.
If you look at the dyno curve, it looks like timing or something was pulled after around 5500 rpm, the other dyno's that i have seen the HP continues to increase until around 6500....
Originally Posted by MAXXPSI
Did you clear 500 miles before any of the pulls? At 500 the ECU removes the rev warnings on the tach and my cars personality changed like nothing i could imagine. I know there is mixed opinions and little fact out there if the tune pre-500 is different, but from my perspective it sure was. Just turned 770 miles today and rip roarin around way better still than the first 500......
Numbers do seem low, maybe the engine is not completely broken in yet. What color is your Z06? Post pictures.
I'm not feeling too proud of it right now due to the dyno results, and I am not much of a photographer, but here is a photo of the car. I am probably going to want to put black wheels on the car instead of silver, and add the black stripe to the hood. This car was just too cheap to pass it up!
BTW, I have a set of drag pack polished star wheels, hoosier 315/30-18's and M&H front runners on the way. Maybe we will have some 1/4 mile times next Saturday.
Thanks for your reply!
Last edited by ACS55; 10-29-2016 at 04:35 PM.
Reason: added photo
The reason I ask about the gear used is because the M7 and A8 will not dyno equal numbers even though both engines may make equal power.
The M7 has a rearend ratio 3:42, 4th gear is 1:1 (the ideal gear for dyno pull. At redline in 4th the car will be at/around155mph
the A8 has rearend 2:41 ratio, 6th gear is 1:1, at redline the car is over 200mph.
Few Dynos will to 200mph, so sometimes operators put the A8 cars in 5th gear to make the pull to redline or uses 6th but stop short of 200mph.
Point is don't get to hung-up on your numbers.
Mine dynoed at one shop at 580rwhp,
at another 520rwhp
My A8 has 3.42 rear gears (according to the window sticker anyway)
My A8 has 3.42 rear gears (according to the window sticker anyway)
no. that's the m7. and dyno means nothing. run it on track and report back mph. that's your indication of hp. dyno good for comparison once modded vs stock but even then weather corrected or not can be misleading
Yes; this A8 car is extremely disappointing. GM should shoot themselves in the head for putting out such garbage. We buyers have to mod them right off the lot to get respectable performance out of them.
However, your numbers do appear abnormally low. Most venders are getting 525/550 easily from this turd. Add a Halltech Stage 1 and a borla x-pipe and it will wake the car up (+ rwhp). No tune required unless you decide to add headers.
I have no idea why people get so caught up in dyno numbers. There's so many factors that go into a dyno run. I don't see how a car with 650 horsepower and torque is a slow. It's one of the fastest cars on the road course straight from the factory.
My A8 has 3.42 rear gears (according to the window sticker anyway)
The window sticker lists "Standard Equipment" found on a base no optioned car. Besides the 3.42, it also says the car has a manual transmission as standard equipment.
THEN, the window sticker lists the optional RPO's the car has, and yours has the A8 transmission and the gas guzzler tax(which is not standard equipment) long with other optional stuff that your particular car has..
The window sticker lists "Standard Equipment" found on a base no optioned car. Besides the 3.42, it also says the car has a manual transmission as standard equipment.
THEN, the window sticker lists the optional RPO's the car has, and yours has the A8 transmission and the gas guzzler tax(which is not standard equipment) long with other optional stuff that your particular car has..
10-29-2016, 03:27 PM
Disappointing Dyno: New 2016 Z06 A8
