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SVTPerformance's Chain of Restaurants
Road Kill Drive-Thru
Z06 is a 11.70 car best case scenario.
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<blockquote data-quote="DSharp" data-source="post: 3835689" data-attributes="member: 9713"><p>Just to give some background on myself before I throw in my thoughts. I built a 97 Cobra to the tune of 420rwhp N/A via a Big Bore set up. I sold the car and am no on the list for a 2007 Z06. I hope that shows my neutral position.</p><p></p><p>First, I'd like to give my experience. I had a friend with a bone stock 2001 Z06 that dynoed 34x rwhp at the same day and shop as me. That same day I dynoed 400rwhp. Now that is a 60rwhp advantage I had plus I had 4.56 gears in the car and a higher rpm range than him. Now if we went to the 1/4 mile strip and raced I would rape him b/c he wasn't as experienced at drag racing. I probably put 4 cars on him due to launch and reaction time alone then run 3-4 tenths faster and even trap 3-4 mph faster. Now racing on the street with him where the launch wasn't a factor it was a different story. If we took off from a 45mph roll I could get a jump and he would reel me in via his 3rd gear and pass in 4th. Point here is there is a 60rwhp difference and only 340lbs difference between the cars so I should have had the advantage based on that; but I didn't. When I put together a model showing power average power under the curve / weight it told the story. Even with my agressive gearing I didn't have enough advantage with the gearing to overtake him from a rolling start to 120. So who's car is faster. I ran better 1/4 times but he ate my lunch on the street. I'd say my car was faster from 0-45, but his car was faster 45-top speed.</p><p></p><p>Now lets take that and apply it to a 2003+ Cobra and a new Z06. Now there is an 700ish (3050 to 3800 I'm estimating) pound weight disadvantage for the Cobra, but the Cobra has a much fatter torque curve than my anemic in comparison 1997. What I think this means is we can use a simpler comparison of peak numbers with the new Z06 and 2003+Cobra b/c the both have similar enough torque curves. So stopping here the 2003 + Cobra is at a 70 rwhp disadvantage. So a stock Z dynoing 450 rwhp is a match with a 520 rwhp Cobra? NO and here is why. First, both cars have enough torque in first gear to roast the tires so the level of acceleration here is defined by driver and tires. The cobra though shifts into 2nd much earlier leaving the Z with a huge torque advantage until it shifts into 2nd and the same routine happens when the Cobra hits 3rd. So if the cars are evenly powered power/lbs, then now the Cobra has a disadvantage due to gearing. It won't matter if the Cobra has 4.10s in it that earlier shift is killer since I don't think that off the line start should provide an advantage to either car. Then when the higher speeds come in we have aerodynamics so the faster the race goes to the more power the Cobra will have to have to hang. The conclusion I am making regarding this is that it will generally take a 550rwhp Cobra or more to hang with a new Z. I know some Cobras have mode producing much fatter torque curves than others so that will make a difference for sure in what peak number is needed.</p><p></p><p>One other thing. The comparisons I have heard on this board regarding 1/4 mile times talk about a stock Z06 and a drag prepped Cobra. "John Doe's cobra ran 11.1 @ 121 with only 510rwhp which is faster than a Z". Yeah that is b/c John Doe launched on slicks and probably lightened his car. Not a fair comparison at all. Even with that John Doe would have his butt handed to him on a race where he couldn't benefit from slicks.</p><p></p><p>Bottom line if you are going to compare the cars, do so with both cars at full factory weight and on true street tires (not drag radials) I would venture a guess that it will take close to 600rwhp for a Cobra to run with the new Z if he were also on his factory tires. Talk about a cloud of smoke!!! Even with 315 street (non drag radial) street tires it would take at least 550rwhp. Now if a Z has the tune and torque management turned off like Phantasm and gets rwhp in the 480s watch out. That game is best only played by the 600rwhp KB/Whipple/Nitrous boys.</p></blockquote><p></p>
[QUOTE="DSharp, post: 3835689, member: 9713"] Just to give some background on myself before I throw in my thoughts. I built a 97 Cobra to the tune of 420rwhp N/A via a Big Bore set up. I sold the car and am no on the list for a 2007 Z06. I hope that shows my neutral position. First, I'd like to give my experience. I had a friend with a bone stock 2001 Z06 that dynoed 34x rwhp at the same day and shop as me. That same day I dynoed 400rwhp. Now that is a 60rwhp advantage I had plus I had 4.56 gears in the car and a higher rpm range than him. Now if we went to the 1/4 mile strip and raced I would rape him b/c he wasn't as experienced at drag racing. I probably put 4 cars on him due to launch and reaction time alone then run 3-4 tenths faster and even trap 3-4 mph faster. Now racing on the street with him where the launch wasn't a factor it was a different story. If we took off from a 45mph roll I could get a jump and he would reel me in via his 3rd gear and pass in 4th. Point here is there is a 60rwhp difference and only 340lbs difference between the cars so I should have had the advantage based on that; but I didn't. When I put together a model showing power average power under the curve / weight it told the story. Even with my agressive gearing I didn't have enough advantage with the gearing to overtake him from a rolling start to 120. So who's car is faster. I ran better 1/4 times but he ate my lunch on the street. I'd say my car was faster from 0-45, but his car was faster 45-top speed. Now lets take that and apply it to a 2003+ Cobra and a new Z06. Now there is an 700ish (3050 to 3800 I'm estimating) pound weight disadvantage for the Cobra, but the Cobra has a much fatter torque curve than my anemic in comparison 1997. What I think this means is we can use a simpler comparison of peak numbers with the new Z06 and 2003+Cobra b/c the both have similar enough torque curves. So stopping here the 2003 + Cobra is at a 70 rwhp disadvantage. So a stock Z dynoing 450 rwhp is a match with a 520 rwhp Cobra? NO and here is why. First, both cars have enough torque in first gear to roast the tires so the level of acceleration here is defined by driver and tires. The cobra though shifts into 2nd much earlier leaving the Z with a huge torque advantage until it shifts into 2nd and the same routine happens when the Cobra hits 3rd. So if the cars are evenly powered power/lbs, then now the Cobra has a disadvantage due to gearing. It won't matter if the Cobra has 4.10s in it that earlier shift is killer since I don't think that off the line start should provide an advantage to either car. Then when the higher speeds come in we have aerodynamics so the faster the race goes to the more power the Cobra will have to have to hang. The conclusion I am making regarding this is that it will generally take a 550rwhp Cobra or more to hang with a new Z. I know some Cobras have mode producing much fatter torque curves than others so that will make a difference for sure in what peak number is needed. One other thing. The comparisons I have heard on this board regarding 1/4 mile times talk about a stock Z06 and a drag prepped Cobra. "John Doe's cobra ran 11.1 @ 121 with only 510rwhp which is faster than a Z". Yeah that is b/c John Doe launched on slicks and probably lightened his car. Not a fair comparison at all. Even with that John Doe would have his butt handed to him on a race where he couldn't benefit from slicks. Bottom line if you are going to compare the cars, do so with both cars at full factory weight and on true street tires (not drag radials) I would venture a guess that it will take close to 600rwhp for a Cobra to run with the new Z if he were also on his factory tires. Talk about a cloud of smoke!!! Even with 315 street (non drag radial) street tires it would take at least 550rwhp. Now if a Z has the tune and torque management turned off like Phantasm and gets rwhp in the 480s watch out. That game is best only played by the 600rwhp KB/Whipple/Nitrous boys. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Kill Drive-Thru
Z06 is a 11.70 car best case scenario.
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