[Z06] Top speed in 6th?
08-17-2007, 10:47 PM
#1
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Top speed in 6th?
Does anyone know what the maximum speed is that a Z06 can achieve in 6th gear? Not the "thoretical", I mean what the engine can actually pull, burdened w/the ratio of 6th gear against the aero resistance. Thanks.
For example, I've ran my LS2 WOT at 160 mph in 6th. It should go over 185 in 5th gear, but it still managed 160 in 6th, at just over 4000 RPM. What'll a ZO6 do?
-Tom
For example, I've ran my LS2 WOT at 160 mph in 6th. It should go over 185 in 5th gear, but it still managed 160 in 6th, at just over 4000 RPM. What'll a ZO6 do?
-Tom
Last edited by Tom400CFI; 08-18-2007 at 11:51 AM.
08-18-2007, 12:23 AM
#2
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this is very frustrating to me. ive topped 167 in 5th but ran out of real estate. this is a problem in the tri state area in new york. plus the road condition isnt very good for high speed runs. 2 of the best roads are I684 ( westchester county) and along the beach( long island) from jones to robert moses. both roads have great straight aways BUT both are concrete and suffer damage from heave and thaw so your car starts skipping about 150. plus along the beach now everybody finds it important to run across the road instead of using the tunnel under it. most of the paved roads arent straight for a long distance and now have video
Last edited by pamperedcar1; 08-18-2007 at 12:25 AM. Reason: add
08-18-2007, 07:31 AM
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Does anyone know what the maximum speed is that a Z06 can achieve in 6th gear? Not the "thoretical", I mean what the engine can actually pull, burdened w/the ratio of 6th gear against the aero resistance. Thanks.
For example, I've ran my LS2 WOT to 160 mph in 6th. It should go over 180 in 5th gear, but it still managed 160 in 6th, at just over 4000 RPM. What'll a ZO6 do?
-Tom
For example, I've ran my LS2 WOT to 160 mph in 6th. It should go over 180 in 5th gear, but it still managed 160 in 6th, at just over 4000 RPM. What'll a ZO6 do?
-Tom
Top speed is in 5th not 6th.
08-18-2007, 08:34 AM
#6
Safety Car
08-18-2007, 11:51 AM
#7
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It's been that way for every 'Vette, F-body, GTO, and CTS-V since the concept of the 6 speed trans was intorduced. I'm well aware of that, and it's no different in my own LS2 version.
Still, I want to know how fast the Z06 can go in 6th gear. Why? (you could just ask that question) Because; the folks on the ZR1 board are often "high and mighty" about the 24 hour records set by the ZR1 of 175 mph average for 24 hours. They've even said that ther late model 'Vettes don't have the reliability of the ZR1 engine and that a current Z06 could not match the ZR1's record. While the record set by the ZR1 is bad-assed, and I love the ZR1, I think that a Z06 has enough hp to run 175 or better in 6th gear, meaning it could match or beat that record never exceeding 4500 RPM....piece of cake. -IF it has enough torque to pull that speed, which I think it does.
Certainly a rear gear swap could return 175 mph+ speeds in 6th gear and ~5000 RPM engine speeds.
Pamperedcar1, Perhaps you could save time and road space by running up to 180ish in 5th, then shift to 6th and see what happens. When I tried it in my car, I went to 160 in 5th, then shifted to 6th, and it held 160 no prob. Got 9mpg at the same time.
Last edited by Tom400CFI; 08-20-2007 at 12:15 PM.
08-18-2007, 12:44 PM
#8
Burning Brakes
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Contact Rodney from RPM:
He can do 5th\6th 0.8\0.7 ALSO he can Do Shorter Final Gear 3.73 or 4.1
rodney@rpmtransmissions.com
He can do 5th\6th 0.8\0.7 ALSO he can Do Shorter Final Gear 3.73 or 4.1
rodney@rpmtransmissions.com
08-18-2007, 11:41 PM
#9
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I dont even use 6th even when Im out doing high speed passes. as a matter of fact I only used 6th to show some friend what a joke it is in the congested new york area. now when i was out in AZ on vac. I was wishing I had my Z
08-19-2007, 10:45 AM
#10
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Really??? NO WAY!!! ARE YOU SERIOUS????
It's been that way for every 'Vette, F-body, GTO, and CTS-V since the concept of the 6 speed trans was intorduced. I'm well aware of that, and it's no different in my own LS2 version.
Still, I want to know how fast the Z06 can go in 6th gear. Why? (you could just ask that question) Because; the folks on the ZR1 board are often "high and mighty" about the 24 hour records set by the ZR1 of 175 mph average for 24 hours. They've even said that ther late model 'Vettes don't have the reliability of the ZR1 engine and that a current Z06 could not match the ZR1's record. While the record set by the ZR1 is bad-assed, and I love the ZR1, I think that a Z06 has enough torque to run 175 or better in 6th gear, meaning it could match or beat that record never exceeding 4500 RPM....piece of cake. -IF it has enough torque to pull that speed, which I think it does.
Certainly a rear gear swap could return 175 mph+ speeds in 6th gear and ~5000 RPM engine speeds.
Pamperedcar1, Perhaps you could save time and road space by running up to 180ish in 5th, then shift to 6th and see what happens. When I tried it in my car, I went to 160 in 5th, then shifted to 6th, and it held 160 no prob. Got 9mpg at the same time.
It's been that way for every 'Vette, F-body, GTO, and CTS-V since the concept of the 6 speed trans was intorduced. I'm well aware of that, and it's no different in my own LS2 version.
Still, I want to know how fast the Z06 can go in 6th gear. Why? (you could just ask that question) Because; the folks on the ZR1 board are often "high and mighty" about the 24 hour records set by the ZR1 of 175 mph average for 24 hours. They've even said that ther late model 'Vettes don't have the reliability of the ZR1 engine and that a current Z06 could not match the ZR1's record. While the record set by the ZR1 is bad-assed, and I love the ZR1, I think that a Z06 has enough torque to run 175 or better in 6th gear, meaning it could match or beat that record never exceeding 4500 RPM....piece of cake. -IF it has enough torque to pull that speed, which I think it does.
Certainly a rear gear swap could return 175 mph+ speeds in 6th gear and ~5000 RPM engine speeds.
Pamperedcar1, Perhaps you could save time and road space by running up to 180ish in 5th, then shift to 6th and see what happens. When I tried it in my car, I went to 160 in 5th, then shifted to 6th, and it held 160 no prob. Got 9mpg at the same time.
08-19-2007, 01:08 PM
#11
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I'm WELL aware of the primary purpose of 6th gear. I clearly stated that above...and even in my first post acknowledged that to some extent. I'm not looking to "brag" about top speeds in 6th so would you just relax already?
Once again....
Originally Posted by Tom400CFI
the folks on the ZR1 board are often "high and mighty" about the 24 hour records set by the ZR1 of 175 mph average for 24 hours. They've even said that ther late model 'Vettes don't have the reliability of the ZR1 engine and that a current Z06 could not match the ZR1's record. While the record set by the ZR1 is bad-assed, and I love the ZR1, I think that a Z06 has enough torque to run 175 or better in 6th gear, meaning it could match or beat that record never exceeding 4500 RPM....piece of cake. -IF it has enough hp to pull that speed, which I think it does.
So I've answered my own question; the LS7 engine does not have enough hp at ~4000 RPM to propel the car to 175 or faster. To match or beat the ZR1's record, it would need a gear swap (something the ZR1 benefited from when it did break that record).
The folks on the ZR1 board claim that the LS7 engine would not survive for 24 hours at the required RPM (in 5th) to break the record, because of it's "push rod" two valve design and the high lift. They think the valve springs would break. I don't think they would, BUT my contention was that the LS7 engine has enough midrange hp to propel the car to a record in 6th gear. I was wrong. But I was right that it does have enough hp by 4500 RPM that it could. That would require a gear swap to hit that RPM in either 5th or 6th gear, at that speed.
Last edited by Tom400CFI; 08-20-2007 at 12:23 PM.
08-19-2007, 10:49 PM
#12
Burning Brakes
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the folks on the ZR1 board are often "high and mighty" about the 24 hour records set by the ZR1 of 175 mph average for 24 hours. They've even said that ther late model 'Vettes don't have the reliability of the ZR1 engine and that a current Z06 could not match the ZR1's record. While the record set by the ZR1 is bad-assed, and I love the ZR1, I think that a Z06 has enough torque to run 175 or better in 6th gear, meaning it could match or beat that record never exceeding 4500 RPM....piece of cake. -IF it has enough torque to pull that speed, which I think it does.
Certainly a rear gear swap could return 175 mph+ speeds in 6th gear and ~5000 RPM engine speeds.
Pamperedcar1, Perhaps you could save time and road space by running up to 180ish in 5th, then shift to 6th and see what happens. When I tried it in my car, I went to 160 in 5th, then shifted to 6th, and it held 160 no prob. Got 9mpg at the same time.
Certainly a rear gear swap could return 175 mph+ speeds in 6th gear and ~5000 RPM engine speeds.
Pamperedcar1, Perhaps you could save time and road space by running up to 180ish in 5th, then shift to 6th and see what happens. When I tried it in my car, I went to 160 in 5th, then shifted to 6th, and it held 160 no prob. Got 9mpg at the same time.
Anyone with a record like that deserves to be "high and mighty".
Technically, the record has been broken by VW with their one-off car.
Pulling 175 in 6th gear would not AVERAGE 175 for 24 hours, however. You have to stop pretty frequently for gas and change of drivers. I doubt you could achieve 9mpg during an all out run.
08-19-2007, 11:03 PM
#13
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Brainerd Run
I have a 2007 Z06 and ran it at Brainerd International Raceway recently. I'm not sure about 6th gear, my sense is the top speed is in 5th. I was consistently running 148mph at 6,500 rpms in 4th. I then shifted into 5th gear and was at 155mph when I tapped the brakes to settle the car and my nerves. Everyone said I should have held it in 4th to over 7,000 rpms, before shifting to fifth. I am going back in September to try and do a better job. The car is amazing, I hear all this talk about super charging, new brakes, tires and wheels. The only thing that needs improving for this car to go faster is me. I would strongly recommend anyone who owns a Z06 to track it. You will learn all you ever need to know about the capabilities of the car. It was born to run.
08-20-2007, 01:22 AM
#14
Melting Slicks
It can't, and I never said that it could. Like I said, not GM car has ever achieved top speed in 6th gear, and "It's been that way for every 'Vette, F-body, GTO, and CTS-V since the concept of the 6 speed trans was intorduced." ZR1 included. When the ZR1 broke that record, it did so in 5th gear, but w/different rear gear to optimize RPM for that engine, reliability, and the desired speed (about 180).
Dude....what exactly do you want me to "give up"??
I'm WELL aware of the primary purpose of 6th gear. I clearly stated that above...and even in my first post acknowledged that to some extent. I'm not looking to "brag" about top speeds in 6th so would you just relax already?
Once again....
I've learned that my threory is not accurate. At 4000 RPM, the Z06 is only making about 300 hp, which is not enough to propel the car 175. With proper rear gearing the car could run in either 5th or 6th (doesn't matter once you swap rear gears) to run about 4500 RPM at which point it will generate 400 hp+...enough to run over 180 mph.
So I've answered my own question; the LS7 engine does not have enough torque or hp at ~4000 RPM to propel the car to 175 or faster. To match or beat the ZR1's record, it would need a gear swap (something the ZR1 benefited from when it did break that record).
The folks on the ZR1 board claim that the LS7 engine would not survive for 24 hours at the required RPM (in 5th) to break the record, because of it's "push rod" two valve design and the high lift. They thin the valve springs would break. I don't think they would, BUT my contention was that the LS7 engine has enough midrange torque to propel the car to a record in 6th gear. I was wrong. But I was right that it does have enough torque and hp by 4500 RPM that it could. That would require a gear swap to hit that RPM in either 5th or 6th gear, at that speed.
Dude....what exactly do you want me to "give up"??
I'm WELL aware of the primary purpose of 6th gear. I clearly stated that above...and even in my first post acknowledged that to some extent. I'm not looking to "brag" about top speeds in 6th so would you just relax already?
Once again....
I've learned that my threory is not accurate. At 4000 RPM, the Z06 is only making about 300 hp, which is not enough to propel the car 175. With proper rear gearing the car could run in either 5th or 6th (doesn't matter once you swap rear gears) to run about 4500 RPM at which point it will generate 400 hp+...enough to run over 180 mph.
So I've answered my own question; the LS7 engine does not have enough torque or hp at ~4000 RPM to propel the car to 175 or faster. To match or beat the ZR1's record, it would need a gear swap (something the ZR1 benefited from when it did break that record).
The folks on the ZR1 board claim that the LS7 engine would not survive for 24 hours at the required RPM (in 5th) to break the record, because of it's "push rod" two valve design and the high lift. They thin the valve springs would break. I don't think they would, BUT my contention was that the LS7 engine has enough midrange torque to propel the car to a record in 6th gear. I was wrong. But I was right that it does have enough torque and hp by 4500 RPM that it could. That would require a gear swap to hit that RPM in either 5th or 6th gear, at that speed.
This is so irrelevant it's ridiculous. Would you swap out your Z for a ZR1 because it maybe can go faster in 6th over 24 hours? Is that what anybody buys this car for? Who the hell cares? ZR1 owners can say whatever they want.
08-20-2007, 02:29 AM
#15
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Hi i have reached to max speed 6th gear 209 mph with intake filter and chip tuning and catback i have the the clip i will try to added if you want by GPS i was runing 206 mph
08-20-2007, 10:45 AM
#17
Racer
It really depends on the wind drag, but I couldn't seem to go much over 170mph in 6th gear, the wind drag just was just too much.
I've gone 180mph (5th gear) with a passenger in the car last summer. We are planning on another drive-out Sept 1 and I plan to take it up to 185 or perhaps 190, that's probably tops considering the elevation is approximately 4500ft. If I ever get another chance to open her up at sea level on a flat open road, I have no doubt 200mph will be my new goal!
EFE Z06
Velocity Vettes
http://www.freewebs.com/velocityvettes/
I've gone 180mph (5th gear) with a passenger in the car last summer. We are planning on another drive-out Sept 1 and I plan to take it up to 185 or perhaps 190, that's probably tops considering the elevation is approximately 4500ft. If I ever get another chance to open her up at sea level on a flat open road, I have no doubt 200mph will be my new goal!
EFE Z06
Velocity Vettes
http://www.freewebs.com/velocityvettes/
Last edited by EFE Z06; 12-29-2007 at 04:04 PM.
08-20-2007, 12:12 PM
#18
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My QUESTION, was, "Could a Z06?". Because IF IT COULD (It can't) then it sould easily (reliably) run in the low 4000 RPM range, and match or beat that record. I've learned that in fact, the Z06 does NOT have enough hp at the RPM is spins in 6th gear at 180, to make the car go 180. BUT, w/the same rear gear swap that the ZR1 was allowed, the Z06 could easily run 185 or better at a low 5000 RPM which sould, I believe, be reliable for 24 hours +.
This thread is cooked. Thanks to all who actually READ my posts, and posted pertinant info.
-Tom
Last edited by Tom400CFI; 08-20-2007 at 12:24 PM.
