Which engine in ZR1 ?
07-26-2023, 01:00 PM
#41
When Ford developed the GT500 they improved the block from the GT350 and went to a cross plane crank. There is not as much benefit from a flat plain crank in an FI application. Although they are less expensive to produce. FI increases volumetric efficiency from being able to blow down, so scavenging is not as much of an issue.
My guess is a twin turbo LT6 with a beefed-up bottom end, cross plane crank, reduced displacement from a smaller bore to increase the cylinder stiffness. The midrange torque will be much greater in a turbo form. I don't think they will need to go to 1Khp. The LT6 is very capable already. Truly can't even imagine a turbo LT6 with 850hp. Will be amazing.
My guess is a twin turbo LT6 with a beefed-up bottom end, cross plane crank, reduced displacement from a smaller bore to increase the cylinder stiffness. The midrange torque will be much greater in a turbo form. I don't think they will need to go to 1Khp. The LT6 is very capable already. Truly can't even imagine a turbo LT6 with 850hp. Will be amazing.
Last edited by Drew888; 07-26-2023 at 05:24 PM.
07-26-2023, 01:13 PM
#42
Pro
I don't live far from the Milford test track. I happened upon an Eray (no camouflage) on Sunday and on Tuesday I saw a lightly camouflaged Z06 @ the stop light. Only the rear was camo. Too quick for the camera but the Z06 sure sounded like a stock 5.5 L Flat Plane . NO BLOWER WHINE OR TURBO SOUND.
Might the ZR1 have the stock 5.5 L Flat Plane with the Battery pack?
Might the ZR1 have the stock 5.5 L Flat Plane with the Battery pack?
Last edited by khartford; 07-26-2023 at 01:29 PM.
07-26-2023, 05:17 PM
#43
Concerned about the weight of the ZR1. The Z06 has put on over 600lbs since the C5/C6 Z06's perfect ethos of light weight and big power. If you add all that turbo hardware and supporting mods to the C8 Z06 already too heavy body, you may end up with a near 4000lb ZR1, but with monster power. In the era of GTR's, Hellcats etc being performance cars, I guess most don't care about weight anymore.
Contrast that with Porsche GT3's. In the same time period, they only increased by about 200lbs...Hope Chevy trims the fat for the ZR1 by a few hundred pounds, but probably asking too much for this particular platform.
Contrast that with Porsche GT3's. In the same time period, they only increased by about 200lbs...Hope Chevy trims the fat for the ZR1 by a few hundred pounds, but probably asking too much for this particular platform.
While true that the Z06 has put on a lot of weight (565 to be exact), the Porsche has gained a mere 27 pounds. 27 pounds from that first 996-gen car. That is astounding in the modern era.
07-27-2023, 11:08 AM
#44
Instructor
My research says 2926 lbs curb weight for 996 GT3 vs 3364 lbs curb weight for the 992 GT3. That's actually more than the 200 lbs I was surmising from memory in my first post but still better than what Chevy has done to the Z06 in similar time period. My premise stands. Z06 has lost its ethos after the C6 Z06. Love the C8 Z06 but its a fat boy even compared to the Porsche and its predecessors.
Also, C5 to C8 Z06 is a difference in weight of 656 lbs. 3118 lbs to 3777 lbs. What's the point of your post again????
07-27-2023, 12:15 PM
#45
Le Mans Master
For the sake of reliability, it makes the most sense for GM to opt for the 5.5 but with a CPC instead of the FPC. Keep boost low-moderate and go from there. But frankly, I'm far less concerned about how the power is going to be made than I am with how the power is going to get put down. While I harbor little to no belief that the ZR1 will opt for the hybrid model, I do hope that the ZR1 takes a more serious approach to its suspension and aero. I was never really all that impressed with the C7 ZR1 and the performance metrics it put out in the real world but, if I'm being honest, I'm not a ZR1 customer regardless. I can't say that I've ever really liked any ZR1 variant all that much. I've always found the Z06's to be far more appealing and a better value proposition.
The following users liked this post:
Savoy2001 (07-28-2023)
07-27-2023, 12:44 PM
#46
Burning Brakes
That's kind of the beauty of the internet. We are certainly all free to have our own opinions on things. I, for one, just don't see the appeal of the ZR1 but, I know many people see that as sacrilegious as it is construed as the most sought-after model since it is the highest trim level in recent years. Lots of folks love their badges and trim levels and refuse to modify so, in their case, it makes the most sense to start with the best model right out the gate.
The following users liked this post:
LE MANSZ (07-27-2023)
07-27-2023, 05:42 PM
#47
Le Mans Master
I don't live far from the Milford test track. I happened upon an Eray (no camouflage) on Sunday and on Tuesday I saw a lightly camouflaged Z06 @ the stop light. Only the rear was camo. Too quick for the camera but the Z06 sure sounded like a stock 5.5 L Flat Plane . NO BLOWER WHINE OR TURBO SOUND.
Might the ZR1 have the stock 5.5 L Flat Plane with the Battery pack?
Might the ZR1 have the stock 5.5 L Flat Plane with the Battery pack?
Turbos are pretty quiet these days.
07-27-2023, 05:59 PM
#48
I'm not sure why you felt the need to attack what I said and end up being so wrong.
My research says 2926 lbs curb weight for 996 GT3 vs 3364 lbs curb weight for the 992 GT3. That's actually more than the 200 lbs I was surmising from memory in my first post but still better than what Chevy has done to the Z06 in similar time period. My premise stands. Z06 has lost its ethos after the C6 Z06. Love the C8 Z06 but its a fat boy even compared to the Porsche and its predecessors.
Also, C5 to C8 Z06 is a difference in weight of 656 lbs. 3118 lbs to 3777 lbs. What's the point of your post again????
My research says 2926 lbs curb weight for 996 GT3 vs 3364 lbs curb weight for the 992 GT3. That's actually more than the 200 lbs I was surmising from memory in my first post but still better than what Chevy has done to the Z06 in similar time period. My premise stands. Z06 has lost its ethos after the C6 Z06. Love the C8 Z06 but its a fat boy even compared to the Porsche and its predecessors.
Also, C5 to C8 Z06 is a difference in weight of 656 lbs. 3118 lbs to 3777 lbs. What's the point of your post again????
The following users liked this post:
SnakeBitten (07-28-2023)
07-27-2023, 06:29 PM
#50
Le Mans Master
That's kind of the beauty of the internet. We are certainly all free to have our own opinions on things. I, for one, just don't see the appeal of the ZR1 but, I know many people see that as sacrilegious as it is construed as the most sought-after model since it is the highest trim level in recent years. Lots of folks love their badges and trim levels and refuse to modify so, in their case, it makes the most sense to start with the best model right out the gate.
07-28-2023, 08:53 AM
#51
Burning Brakes
I'm sure you saw on the internet that the C7 ZR1 fixed the 'overheating' problem of the Z06 with an additional 105 hp and 65 lbs-ft. That is objective fact not an opinion. Who doesn't like more power? Looking at your screen name I can see why you have that opinion, though.
04-14-2024, 12:53 AM
#53
Melting Slicks
- It's 5.5L and coded LT7
- Not sure if bore/stroke is the same as the LT6
- It has Twin Turbochargers
- There is still a question whether FPC or CPC
- Still speculation on output, but IMHO, I can easily see it pushing 900/700 HP/TQ
- May or may not have AFM
The following users liked this post:
BearZ06 (04-14-2024)