Gear Ratios?
Thread Starter
Drifting
Joined: Dec 2009
Posts: 1,404
Likes: 7
From: Malverne New York
Yeah, I used the 6600 number in my calculations. More or less, the results are close enough to get the gist of it.
One of the things I'm itching to know the most is what this car will trap in the quarter mile. I have my fingers crossed for 120mph or better. Seems like a good improvement placing the car between the current base/grand sport and Z06. I'm tempted to start a poll on what people think the cars trap speed will be, but I've already started 2 or 3 polls on this car lol.
One of the things I'm itching to know the most is what this car will trap in the quarter mile. I have my fingers crossed for 120mph or better. Seems like a good improvement placing the car between the current base/grand sport and Z06. I'm tempted to start a poll on what people think the cars trap speed will be, but I've already started 2 or 3 polls on this car lol.
Team Owner
Joined: Sep 1999
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From: Springfield MO
Instructor
Joined: Dec 2012
Posts: 152
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From: Austin Texas
Sorry, I was unclear. When you shift at 6500 RPM's, the Z51 will drop to 4500 RPM's for the next higher gear. The Stingray looks like the 1-2 shift will drop the R's to 4200, but the 2-3 shift looks like 4700. 3-4 shift only drops to 4900.
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Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
^^^ Oh look, guess the "OMG IT MAKES SO MUCH TORQUE AND WILL BE SO MUCH FASTER" folks need to reread that. Not trying to be a jerk by saying that, just hope everyone processes those numbers.
HP > TQ. The low end is the easy part, and lets be real, it could be down 10 hp from the ls3 and the corvette would be fine. Does anybody really believe the corvette needs more torque? Rev the vette to just 4000 and your already in questionably legal speed territory.
I just hope, and it seems like they have, they spent as much time getting top end air flow up. VVT to boost low end is great for selling your average car, make it feel faster to your everyday buyer, but I'd rather a more aggressive cam up top. A 6200rpm peak would be awesome. As the math shows, the huge increase below 4000rpms doesn't mean squat in the real world.
HP > TQ. The low end is the easy part, and lets be real, it could be down 10 hp from the ls3 and the corvette would be fine. Does anybody really believe the corvette needs more torque? Rev the vette to just 4000 and your already in questionably legal speed territory.
I just hope, and it seems like they have, they spent as much time getting top end air flow up. VVT to boost low end is great for selling your average car, make it feel faster to your everyday buyer, but I'd rather a more aggressive cam up top. A 6200rpm peak would be awesome. As the math shows, the huge increase below 4000rpms doesn't mean squat in the real world.
Thread Starter
Drifting
Joined: Dec 2009
Posts: 1,404
Likes: 7
From: Malverne New York
^^^ Oh look, guess the "OMG IT MAKES SO MUCH TORQUE AND WILL BE SO MUCH FASTER" folks need to reread that. Not trying to be a jerk by saying that, just hope everyone processes those numbers.
HP > TQ. The low end is the easy part, and lets be real, it could be down 10 hp from the ls3 and the corvette would be fine. Does anybody really believe the corvette needs more torque? Rev the vette to just 4000 and your already in questionably legal speed territory.
I just hope, and it seems like they have, they spent as much time getting top end air flow up. VVT to boost low end is great for selling your average car, make it feel faster to your everyday buyer, but I'd rather a more aggressive cam up top. A 6200rpm peak would be awesome. As the math shows, the huge increase below 4000rpms doesn't mean squat in the real world.
HP > TQ. The low end is the easy part, and lets be real, it could be down 10 hp from the ls3 and the corvette would be fine. Does anybody really believe the corvette needs more torque? Rev the vette to just 4000 and your already in questionably legal speed territory.
I just hope, and it seems like they have, they spent as much time getting top end air flow up. VVT to boost low end is great for selling your average car, make it feel faster to your everyday buyer, but I'd rather a more aggressive cam up top. A 6200rpm peak would be awesome. As the math shows, the huge increase below 4000rpms doesn't mean squat in the real world.
Thread Starter
Drifting
Joined: Dec 2009
Posts: 1,404
Likes: 7
From: Malverne New York
Okay, that makes sense now. Thanks for the info. And it's interesting, like McGirk said, if it has to much torque now below 4000 rpms, why make the gearing in a way that you'll rarely ever see/feel that torque?
Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
Don't get me wrong, people cruising through town will feel it... but don't they already? It only takes so much torque to get to 35 around town, and mid range rpms can already get you in trouble speed wise. VVT is great on small displacement engines so they don't need to scream and drink gas in daily driving, but it's useless on a 3200lb, 400+lb ft car.
Now, the guys that spend 10 grand having an Eaton or other top mount installed and say they got it over a centrifugal supercharger because they like the low end feel... they are the ones that blow my mind when it comes to common sense.
Now, the guys that spend 10 grand having an Eaton or other top mount installed and say they got it over a centrifugal supercharger because they like the low end feel... they are the ones that blow my mind when it comes to common sense.
Intermediate
Joined: Mar 2013
Posts: 29
Likes: 3
Along the same lines, has anyone heard if the C7 will require CAGS, the skip shift bypass, requirement? Or will the 7th gear and operating on 4 cylinders in ECO mode eliminate the "gas guzzler" penalty? Yeh, I know CAGS can be bypassed, but it might also void the warranty.
Thread Starter
Drifting
Joined: Dec 2009
Posts: 1,404
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From: Malverne New York
I still don't understand why 2 over-drive gears are necessary. It makes no sense to me. Why not make 6th gear a closer gear ratio and turn 6th gear into the top speed gear? What's the purpose of having 6th and 7th as cruising over-drive gears? Will anybody say, "you know what, I feel like saving gas today while cruising, but not THAT much gas, so I'll use 6th today." Or if someone decides they want to cruise at 100mph instead of 70, then maybe overdrive #2 will come in handy 
Night Owl for life
Joined: Nov 2003
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From: Bugs Bunny should'a made a left turn here
I still don't understand why 2 over-drive gears are necessary. It makes no sense to me. Why not make 6th gear a closer gear ratio and turn 6th gear into the top speed gear? What's the purpose of having 6th and 7th as cruising over-drive gears? Will anybody say, "you know what, I feel like saving gas today while cruising, but not THAT much gas, so I'll use 6th today." Or if someone decides they want to cruise at 100mph instead of 70, then maybe overdrive #2 will come in handy
Racer
Joined: Jul 2012
Posts: 308
Likes: 6
From: Winnetka, CA
I still don't understand why 2 over-drive gears are necessary. It makes no sense to me. Why not make 6th gear a closer gear ratio and turn 6th gear into the top speed gear? What's the purpose of having 6th and 7th as cruising over-drive gears? Will anybody say, "you know what, I feel like saving gas today while cruising, but not THAT much gas, so I'll use 6th today." Or if someone decides they want to cruise at 100mph instead of 70, then maybe overdrive #2 will come in handy
I'm all for a track version of the 7 speed which runs the ratios tighter together coupled with a higher final drive and another 500-1000 RPM of motor
Thread Starter
Drifting
Joined: Dec 2009
Posts: 1,404
Likes: 7
From: Malverne New York
7th is all about fuel efficiency and emissions in highway cycle. The world is only getting stricter on fleet averages, in order for a car like the Corvette to exist into the future it has to squeeze every last ounce of economy out of the drivetrain.
I'm all for a track version of the 7 speed which runs the ratios tighter together coupled with a higher final drive and another 500-1000 RPM of motor
I'm all for a track version of the 7 speed which runs the ratios tighter together coupled with a higher final drive and another 500-1000 RPM of motor