510whp SVT Cobra vs. 425whp C6 'vette
04-06-2008, 03:15 AM
#1
Teching In
Thread Starter
Join Date: Mar 2008
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
510whp SVT Cobra vs. 425whp C6 'vette Ran a friends 03 SVT Cobra...
Drivetrain mods:
Pulley, intake, modified intercooler, full exhaust, tuning, suspension mods, and a bunch of other stuff, I can't remember his complete list. His car is basically the typical modified Cobra (big pulley + all of the supporting bolt-ons). It's an awesome car and was a blast to drive. It also has a killer sound and supercharger whine.
Dyno'd at...
510whp
500wtq
Pic:
My car: 05 C6 Z51 6-speed
Drivetrain mods:
G5X3 112LSA Cam, UD Pulley, LGM Long Tubes, Corsa Sport Catbacks, Halltech Stinger CAI, tune, and 71k daily driver miles to break it all in.
Dyno'd at...
425whp
396wtq
Pic:
We both expected the Cobra to win, but my friend said he expected it to be a pretty decisive win for the Cobra... the phrase "walk all over" was used!
First run:
50 mph roll, me in 2nd, him in 3rd - The Cobra gets a half car jump but right away but that's it. On my 2-3 shift, he gets another half car jump. From 60 to 110 my C6 holds the same exact spot immediately off the Cobra's bumper, and above 110 starts to inch past until we shut down at 125. We're both a little surprised... if our shifting was seamless, we'd be neck and neck until the aero advantage showed itself in the triple digits...
Second run:
50 mph roll, me in 2nd, him in 3rd - This time the Cobra doesn't get a jump and we both stay neck and neck until I shift into third, at which point he gains half a car, but after that we are again "locked" in place all the way until ~110, at which point I just start creeping until we shut down at 120. Hmm... let's do this again, I'm having fun!
Third run:
55mph roll, me in 3rd, him in 3rd - We both punch the gas and are neck and neck. When I shift into 4th I begin to creep away a very small amount, and as the speed goes over 100, I start inching away more and more to about 120.
After three runs of essentially the same results, I called it quits. One of my friends (who actually has a STOCK PULLEY 03 Cobra) says the Cobra needs 50 to 75whp to overcome the weight and aero disadvantage against a C6, but this never seemed right to me. After tonight's runs, though, I'm thinking he's on to something... My friend with the 510whp Cobra wasn't too happy afterwards.
This was my first time running with the cam and needless to say I'm very happy with how my car did.
Drivetrain mods:
Pulley, intake, modified intercooler, full exhaust, tuning, suspension mods, and a bunch of other stuff, I can't remember his complete list. His car is basically the typical modified Cobra (big pulley + all of the supporting bolt-ons). It's an awesome car and was a blast to drive. It also has a killer sound and supercharger whine.
Dyno'd at...
510whp
500wtq
Pic:
My car: 05 C6 Z51 6-speed
Drivetrain mods:
G5X3 112LSA Cam, UD Pulley, LGM Long Tubes, Corsa Sport Catbacks, Halltech Stinger CAI, tune, and 71k daily driver miles to break it all in.
Dyno'd at...
425whp
396wtq
Pic:
We both expected the Cobra to win, but my friend said he expected it to be a pretty decisive win for the Cobra... the phrase "walk all over" was used!
First run:
50 mph roll, me in 2nd, him in 3rd - The Cobra gets a half car jump but right away but that's it. On my 2-3 shift, he gets another half car jump. From 60 to 110 my C6 holds the same exact spot immediately off the Cobra's bumper, and above 110 starts to inch past until we shut down at 125. We're both a little surprised... if our shifting was seamless, we'd be neck and neck until the aero advantage showed itself in the triple digits...
Second run:
50 mph roll, me in 2nd, him in 3rd - This time the Cobra doesn't get a jump and we both stay neck and neck until I shift into third, at which point he gains half a car, but after that we are again "locked" in place all the way until ~110, at which point I just start creeping until we shut down at 120. Hmm... let's do this again, I'm having fun!
Third run:
55mph roll, me in 3rd, him in 3rd - We both punch the gas and are neck and neck. When I shift into 4th I begin to creep away a very small amount, and as the speed goes over 100, I start inching away more and more to about 120.
After three runs of essentially the same results, I called it quits. One of my friends (who actually has a STOCK PULLEY 03 Cobra) says the Cobra needs 50 to 75whp to overcome the weight and aero disadvantage against a C6, but this never seemed right to me. After tonight's runs, though, I'm thinking he's on to something... My friend with the 510whp Cobra wasn't too happy afterwards.
This was my first time running with the cam and needless to say I'm very happy with how my car did.
04-06-2008, 04:29 AM
#2
TECH Enthusiast
Join Date: Nov 2007
Location: Louisiana, USA
Posts: 700
Likes: 0
Received 0 Likes
on
0 Posts
Good runs. Sounds about right. The weight/aero advantage for the C6's is plenty to overcome. I've raced my brother in his stock LS2 C6 a few times (always from a stop) and our runs have gone both ways depending on who gets a better launch....I'm only a little over 400rwhp. Your bud's Cobra should weigh just a tad bit more than my blown GT.
Tell him not to feel so bad. Those runs went just about how they should given both of your mods. He needs that extra power advantage to overcome his mass/aero disadvantages.
Tell him not to feel so bad. Those runs went just about how they should given both of your mods. He needs that extra power advantage to overcome his mass/aero disadvantages.
Sounds like you guys had some fun.
04-06-2008, 07:46 AM
#6
TECH Apprentice
Join Date: Oct 2006
Location: Ft. Carson, Colorado Springs
Posts: 365
Likes: 0
Received 0 Likes
on
0 Posts
i have seen your car around post and its very sexy. nice draw lol. hey how do you like your cam? im still contemplating ideas on my cam but i want to be absolutely sure before i buy it. hows the surge? who did you tuning? and sorry for the thread jack
Last edited by unit213; 04-06-2008 at 09:03 AM.
04-06-2008, 08:32 AM
#7
Teching In
Join Date: Mar 2008
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Very cool read!
Too many people get stuck on the whole "rwhp vs. rwhp" thing and think that the car with more will always win. Nice to see you help educate someone on the advantage gained by having a car with less weight and better aerodynamics.
Very nice car by the way. Everyone should have a black C6 Vette.
Too many people get stuck on the whole "rwhp vs. rwhp" thing and think that the car with more will always win. Nice to see you help educate someone on the advantage gained by having a car with less weight and better aerodynamics.
Very nice car by the way. Everyone should have a black C6 Vette.
Trending Topics
04-06-2008, 09:06 AM
#9
Administrator
04-06-2008, 01:24 PM
#16
Nice Vette man and nice runs! A Cobra does in fact need anywhere from 40-75rwhp more to run with a Vette above 120 mph or loose 200-300lbs. The weight and drag are much more in the Vettes favor. Congrats. Now tell your buddy to toss his IRS and save every pound he can since you are not done modding yet either.
04-06-2008, 01:47 PM
#18
Teching In
Thread Starter
Join Date: Mar 2008
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the comments guys, I appreciate it. His blower may be ported, I'm not sure. We also used different dynos... I'm thinking about going to the dyno he used just out of curiousity.
Next time I'll try and get a video... for now all I have is this video I made of my car (the red stripes are currently off the car):
http://www.youtube.com/watch?v=9vMR5oVLUMg#GU5U2spHI_4
Thanks, I daily drive it and can usually be seen around 19th street during the day.
All of the work was done by LG Motorsports in Wylie, TX. They first put a street tune on it, and then once they fixed their dyno a few weeks later, they touched it up and dyno tuned it. It's a very agreeable DD cam. The 112 LSA gives it a rough and lopey idle that sounds mean, but the car is getting easier and easier to drive. Beneath 2k RPM it can be a little lopey and have a slight flat spot, but as long as I drive it above 1500 RPMs in gear, it won't surge or buck. When the engine is cold, though, it will be harder to drive, but once warm it's easy and smooth. The torque curve is also a little up and down from 2k to 3k, but after 3k RPM, it's amazing. LG does a lot of their tuning and part design for the mid-range, where road racing tends to put the engine. Prior to the cam I had more torque below 3k RPM, but who races below 3k?
I thought about using Sunshine here in Killeen, but for various reasons decided to stick with LGM.
Next time I'll try and get a video... for now all I have is this video I made of my car (the red stripes are currently off the car):
http://www.youtube.com/watch?v=9vMR5oVLUMg#GU5U2spHI_4
All of the work was done by LG Motorsports in Wylie, TX. They first put a street tune on it, and then once they fixed their dyno a few weeks later, they touched it up and dyno tuned it. It's a very agreeable DD cam. The 112 LSA gives it a rough and lopey idle that sounds mean, but the car is getting easier and easier to drive. Beneath 2k RPM it can be a little lopey and have a slight flat spot, but as long as I drive it above 1500 RPMs in gear, it won't surge or buck. When the engine is cold, though, it will be harder to drive, but once warm it's easy and smooth. The torque curve is also a little up and down from 2k to 3k, but after 3k RPM, it's amazing. LG does a lot of their tuning and part design for the mid-range, where road racing tends to put the engine. Prior to the cam I had more torque below 3k RPM, but who races below 3k?
I thought about using Sunshine here in Killeen, but for various reasons decided to stick with LGM.
