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04 Whipple Cobra dyno!

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Old May 12, 2005 | 12:21 AM
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Default 04 Whipple Cobra dyno!

I know this is an LS1 sight, but there are plenty of Cobra guys here also. I talked to a guy tonight at the track with an 04 Cobra. He had the Whipple at 12 psi, Bassani mid-lengths, full exhaust (not sure which) an intake and tuning. He put down 545 corrected RWP (572 uncorrected) and 499 RWT (not sure about uncorrected). Oh and by the way, this was on a mustang dyno. He was running 12.4's @120 spinning tires until half-way. I give credit where credit is due and that was downright awesome. Hats off to the mighty Cobra! I always like to know what the competition runs so I thought I'd pass this along.
Old May 12, 2005 | 09:08 AM
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The car may be awesome, but it should be taken away from the driver. If that's all the better he can get it to go through the quarter he needs to stop driving before he gets himself hurt.... 12.4 with 545HP. I ran a 12.0 with over 150 less HP. What a waste...
Old May 12, 2005 | 09:18 AM
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Granted......it was his first time ever racing. The car has 3000 miles on it. I'd really like to see his times if he could hook up. But I will point out again that he was spinning halfway running stock tires. It's a work in progress........a solid rear end is next he said. I could spin the tires through 3rd in my 2000 SS and that had maybe 330 RWP. I can't imagine 545 RWP, and I'm sure it isn't the easiest car to drive. He'll learn in time.
Old May 12, 2005 | 09:25 AM
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Hopefully he learns quickly. I wouldn't want to line up against him at this point. (Not afraid to lose, just afraid that he would lose control of that beast and run into me.)
later
Old May 12, 2005 | 10:46 AM
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Originally Posted by 2002blackZ
The car may be awesome, but it should be taken away from the driver. If that's all the better he can get it to go through the quarter he needs to stop driving before he gets himself hurt.... 12.4 with 545HP. I ran a 12.0 with over 150 less HP. What a waste...
you ran only 12.0s with nearly 400 rwhp? jeez what a waste. i ran 11.71 with 328 rwhp in my TA.

cobras dont make for even average drag cars. most are in the 3900 lbs raceweight with their IRS and radial tires it isnt easy.
Old May 12, 2005 | 11:14 AM
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Originally Posted by gator's 99TA
you ran only 12.0s with nearly 400 rwhp? jeez what a waste. i ran 11.71 with 328 rwhp in my TA.

cobras dont make for even average drag cars. most are in the 3900 lbs raceweight with their IRS and radial tires it isnt easy.
You're right, my car is slow for the power I should be making... What's your car weigh? I'm guessing that 328 rwhp isn't after you flip the switch...
Old May 12, 2005 | 11:52 AM
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those cars have serious problems hooking even with 315 drag radials my friend has an 04 with the 2.2 litre Kenny Belle and he is putting down 560 rwhp corrected and he runs 315 drags and still can barely hook.
Old May 12, 2005 | 01:57 PM
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my raceweight is 3500 lbs. my runs are N/A. hopefully i will be breaking 10.90s on a small NX shot but no numbers yet.

i ran 11.59 @ 116 at 3400 lbs. same 328 rwhp.

my point is give the mustang a break. its all about the setup.
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Old May 12, 2005 | 03:15 PM
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what's your 60'
Old May 12, 2005 | 08:40 PM
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1.53 average
Old May 12, 2005 | 09:24 PM
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I question those dyno numbers at only 12psi...especially on a Mustang Dyno.
Old May 12, 2005 | 09:30 PM
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gator isn't making up his numbers, and he is n/a for now.
Old May 12, 2005 | 09:45 PM
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Originally Posted by unit213
I question those dyno numbers at only 12psi...especially on a Mustang Dyno.
same here but i wasnt going to say anything
Old May 12, 2005 | 09:58 PM
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Even if he wasn't hooking, how could his mph only be 120? I know that cobras are heavy but that's really low for 545 rwhp on mustang dyno.
Old May 12, 2005 | 11:36 PM
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Maybe he has a clutch problem.... I trapped 123-124mph because of a clutch slipping. My only 60ft was 2.4 and i ran 12.3 which is .1 faster than without the SC lol. The clutch never gave me anymore runs after that. A simple thing like a weak clutch can make a car run more than a 1 sec slower and lose 5-7mph easy.
Old May 13, 2005 | 12:06 AM
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Well I really don't know the ins and outs of that car, but I certainly believe him. He said he was pretty sure it was a mustang dyno because he remembers the guy telling him that one will dyno different from the other. Maybe it was a dynojet and he didn't know any better. Does this sound right for a dynojet? He is really new to all this car modding.......actually a GM guy who got one hell of a deal on the Cobra. I'd have done the same in his shoes. Anyway, it's obvious the car could run a lot faster with traction. Which is why he's going solid rear with better tires. All I know is that he was getting sideways through the first half of each pass and he was shifting early and bogging it down some.......if you can bog a car that has this kind of power! It sure looked sweet pulling as hard as it did. And also, like I mentioned, never raced in his life. Pretty decent for a first time. There was another fellow with an 04 running a 2.8 (I think) pulley on the stock blower with the intake, throttlebody, exhaust and predator tuner. He was running 12.2's all night with serious traction as well. He was trapping 118ish. After watching his launches, if he could have hooked he would have had easy 11's. He was running 315 drag radials (don't remember which brand but they sure didn't look like 315's) and hooking pretty good from 2nd on out. Just wanted to give kudos to these beasts!
Old May 13, 2005 | 09:07 AM
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Originally Posted by gator's 99TA
cobras dont make for even average drag cars. most are in the 3900 lbs raceweight with their IRS and radial tires it isnt easy.
I believe maybe a convertable may weigh in at 3900, but I dont think they even weigh that much.

I think the 03-04 Cobras are bad *** rides.
They are hard as hell to launch, because they actually make torque, and they make it instantly. My friends 03 with pulley exhaust tune was making 499rwtq.
Our cars with H/C might make 420rwtq and it isnt till 3500-4500 rpm.
Old May 13, 2005 | 09:36 AM
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cobras are 3700 lbs by themselves but throw in a 200 lbs driver and look at what you got. a 3900 lbs race weight. this assumes you didnt take out the spare, jack, etc like most do. but you never know.

as for the big mustang dyno numbers, i have a feeling it was on a mustang dyno but the final numbers are in "dynojet conversion numbers" where it adds a percentage to make it comparable to a dynojet. too many operators do that but people get mad when their loaded numbers are lower than dynojet dynos.

again just an observation.
Old May 14, 2005 | 12:10 AM
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Originally Posted by LSs1Power
Maybe he has a clutch problem.... I trapped 123-124mph because of a clutch slipping. My only 60ft was 2.4 and i ran 12.3 which is .1 faster than without the SC lol. The clutch never gave me anymore runs after that. A simple thing like a weak clutch can make a car run more than a 1 sec slower and lose 5-7mph easy.
That's good news becuase my car trapped about 6 mph lower and about a half a second slower than i was expecting it to and i think my clutch is the culprit.
Old May 14, 2005 | 02:16 AM
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Originally Posted by 02 Camaro SS
That's good news becuase my car trapped about 6 mph lower and about a half a second slower than i was expecting it to and i think my clutch is the culprit.

Nah wise guys.... you know a clutch is slipping when certain things happens:

1. You hit the rev limiter even though the car almost moved. (Not Wheel Spin)
2. The pedal feels mushy at the end and in some really bad cases it sticks to the floor.
3. Really bad smell that lasts the whole time until u reach home.

My problem on that run were that i was still doing under 100mph when i had to shift to 4th gear due to clutch slippage. I hit the Rev limiter 7000RPM before the end of the run although i was running 26inch street tires and 3.73 gears which means they are good for at least 138-141mph (Depends on which gear calculator u go with) before i should see the limiter. I never aborted the run because the clutch pedal was still coming back and i knew that was my only run for the day.

After i let the clutch cool down for few hours.... I did a 2nd run if u want to know and i got 2.8 60ft and the clutch pedal never came back up. Ofcourse i ran 27 sec at 38 mph.

I guess u never had a chance to blow a clutch. I have been through 3 so far so i know when a clutch is slipping ok. Next time think about what you are saying before you type.



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