Bone Stock ZO6 dyno numbers!!!
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FormerVendor
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From: Albany, New York
Bone Stock ZO6 dyno numbers!!! We'll I finally got 500 miles on the Z which qualified it as broken in! 
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
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FormerVendor
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From: Albany, New York
Originally Posted by Big-DEN
My guess, is kooks + tuning bring you very near to the 490rwhp mark and close to 470rwtq.
Lets say 475-495rwhp and 460-475rwtq with kooks and tuning.
Lets say 475-495rwhp and 460-475rwtq with kooks and tuning.
Originally Posted by 9D9LS
We'll I finally got 500 miles on the Z which qualified it as broken in!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Will talk once I get back from the Cannonball One Lap Of America. John O
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FormerVendor
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From: Albany, New York
Originally Posted by Ojustracing
Howie great to see some good numbers. Now get that thing to the road course. There was 3 c-6 z0-6 at Lime Rock a few weekends ago. Will talk once I get back from the Cannonball One Lap Of America.
John O
Will talk once I get back from the Cannonball One Lap Of America. John O
Going to Watkins Glen next month for two days! Harness bar and belts are on there way. Have fun at the Cannonball! Say high to blondes in the Lambo!
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By your sig, I'm guessing it was on a Dyno Dynamics dyno. Those numbers are almost exactly what I saw on a Dynojet (SAE). See my post here.
https://ls1tech.com/forums/dynamometer-results-comparisons/475141-z06-ls7-before-after-headers.html
Curious if you did any logging while it was on the dyno?
https://ls1tech.com/forums/dynamometer-results-comparisons/475141-z06-ls7-before-after-headers.html
Curious if you did any logging while it was on the dyno?
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I have had a number of cutomers put their cars on the dyno. They are all making 455-465 RWHP. So your numbers are where they are supposed to be. Hot Rod Magazine did a engine dyno pull on a LS7 crate motor a couple of months ago. Using the stock exhaust manifold without cats or mufflers. they made 546 HP. They figured adrop of 22HP if you used the cats and mufflers. That puts the motor at 524 HP. GM as they always do under rates their engines out put. I would guess that a real HP number at the crank on these engines would fall into the 520-530 HP range. Enjoy your car. You might want to try using some better tires than the sorry run flats that come on the car. You will notice a big improvment in handling and ride if you do... 
Originally Posted by Redline-Motorsports
We'll I finally got 500 miles on the Z which qualified it as broken in!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Originally Posted by slt200mph
I have had a number of cutomers put their cars on the dyno. They are all making 455-465 RWHP. So your numbers are where they are supposed to be. Hot Rod Magazine did a engine dyno pull on a LS7 crate motor a couple of months ago. Using the stock exhaust manifold without cats or mufflers. they made 546 HP. They figured adrop of 22HP if you used the cats and mufflers. That puts the motor at 524 HP. GM as they always do under rates their engines out put. I would guess that a real HP number at the crank on these engines would fall into the 520-530 HP range. Enjoy your car. You might want to try using some better tires than the sorry run flats that come on the car. You will notice a big improvment in handling and ride if you do...
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From: GA
GM has always done that. If you remember back in the 60's with the 1967 L-88 Corvette, that was a 427 rated at only 425 HP. But they also had an option of a 427 435 HP. If you pay close attention the L-88 put out a lot more power than 425 HP. They aren't lying, all they did was bump down the rpm instead of the L-88 rating (and this is estimate) 500 HP @5600 RPM they moved it to 425 HP @4800 RPM.
6600 rpm clutch dump of death Administrator
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From: Texas
Good numbers. Keep an eye on IAT as that is what kills dyno numbers. YOu can loose 20+RWHP from the loss of timing, from just midly higher IATs. That is what tuning resolves.
No one ever got fired or sued for underating numbers. But Ford got sued for over rating the Cobras if you'll remeber. GM wants to ensure tha tthe worst motor will make 505. Those that come out slighly ahead, are just icing on the cake for the owners.
Also you'll find the loss in the driveline to not be a percentage, but rather a fixed loss. On a C5 its about 50-55HP going from a Superflow to a Dynojet. On the C6Z06 I don't know as there is more mass in the rearend.
No one ever got fired or sued for underating numbers. But Ford got sued for over rating the Cobras if you'll remeber. GM wants to ensure tha tthe worst motor will make 505. Those that come out slighly ahead, are just icing on the cake for the owners.
Also you'll find the loss in the driveline to not be a percentage, but rather a fixed loss. On a C5 its about 50-55HP going from a Superflow to a Dynojet. On the C6Z06 I don't know as there is more mass in the rearend.
Originally Posted by Redline-Motorsports
We'll I finally got 500 miles on the Z which qualified it as broken in!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Baselined the car this last week and it made 457.1 RWHP and 436 RWFT!! The A/F ratio was 11.5:1 across the boards!
GM has really underated these motors and puts this thing close to 535 at the flywheel based upon a 15% drivetrain loss. I am trying to get to the track and and see what we can squeak out of it on stock tires. The Kooks LT headers just showed up the day after the baseline so that will be the first mod followed by some tuning.
Thanks GM!
Originally Posted by blackbird95
GM has always done that. If you remember back in the 60's with the 1967 L-88 Corvette, that was a 427 rated at only 425 HP. But they also had an option of a 427 435 HP. If you pay close attention the L-88 put out a lot more power than 425 HP. They aren't lying, all they did was bump down the rpm instead of the L-88 rating (and this is estimate) 500 HP @5600 RPM they moved it to 425 HP @4800 RPM.
Originally Posted by J-Rod
Good numbers. Keep an eye on IAT as that is what kills dyno numbers. YOu can loose 20+RWHP from the loss of timing, from just midly higher IATs. That is what tuning resolves.
No one ever got fired or sued for underating numbers. But Ford got sued for over rating the Cobras if you'll remeber. GM wants to ensure tha tthe worst motor will make 505. Those that come out slighly ahead, are just icing on the cake for the owners.
Also you'll find the loss in the driveline to not be a percentage, but rather a fixed loss. On a C5 its about 50-55HP going from a Superflow to a Dynojet. On the C6Z06 I don't know as there is more mass in the rearend.
No one ever got fired or sued for underating numbers. But Ford got sued for over rating the Cobras if you'll remeber. GM wants to ensure tha tthe worst motor will make 505. Those that come out slighly ahead, are just icing on the cake for the owners.
Also you'll find the loss in the driveline to not be a percentage, but rather a fixed loss. On a C5 its about 50-55HP going from a Superflow to a Dynojet. On the C6Z06 I don't know as there is more mass in the rearend.
Originally Posted by UnZFeat'd
which year cobras were overrated? when was this?