Originally Posted by amxguy1970

Not the ratio, the effect it plays. It takes more work to get a car from 0-10 then it does from 30-40. The faster you go the more aerodynamics play then weight.

Originally Posted by hatrickstu

i would like to see some scientific evidence supporting his claim anyways. im no physics major, but it appears to me you are still trying to get X amount of weight to move X distance. if you are accelerating the same car from 0-20 mph, and again from 20-40, why is the weight less of a factor in the 20-40 one? momentum on a flat plain isnt going to aid acceleration.



you didnt catch the sarsasm in my above post you are referencing.

Originally Posted by gos2difbeat

2003 -2004 Cobra Engine/Drivetrain
2003 -2004 Cobra Engine Displacement 4.6L 281cid DOHC Modular w/Eaton Supercharger
2003 -2004 Cobra Compression Ratio 8.5:1
2003 -2004 Cobra Horsepower 390 hp @ 6000 rpm
2003 -2004 Cobra Torque 390 lbs.-ft. @ 3500 rpm
2003 -2004 Cobra Transmission Tremec T56 Six speed
2003 -2004 Cobra Rear end IRS 8.8″ 3.55:1 w/traction lock
2003 -2004 Cobra Suspension
2003 -2004 Cobra Front Modified Macpherson strut type with Bilstein struts, linear rate coil springs, and 29mm anti-roll bar
2003 -2004 Cobra Rear Multi-link independent with upper and lower control arms, linear rate coil springs, and 26mm anti-roll bar
2003 -2004 Cobra Brakes
2003 -2004 Cobra Front 13.0 in. (330mm) vented Brembo disc, PBR twin-piston caliper
2003 -2004 Cobra Rear 11.65 in. (296mm) vented disc, single-piston caliper
2003 -2004 Cobra Anti-lock Brakes/Traction Control Four wheel anti-lock with traction control standard
2003 -2004 Cobra Wheels/Tires
2003 -2004 Cobra Wheels 17 x 9 in. 5-spoke cast aluminum
2003 -2004 Cobra Tires Goodyear™ Eagle F1, 275/40ZR-17
2003 -2004 Cobra Other General Specifications
2003 -2004 Cobra Wheelbase 101.3
2003 -2004 Cobra Length 183.5
2003 -2004 Cobra Width 73.1
2003 -2004 Cobra Height 52.5
2003 -2004 Cobra Front/Rear Track 60.3/60.3
2003 -2004 Cobra Weight Coupe: 3665 Conv: Aprox. 150lb more

2003 -2004 Cobra Engine/Drivetrain
2003 -2004 Cobra Engine Displacement 4.6L 281cid DOHC Modular w/Eaton Supercharger
2003 -2004 Cobra Compression Ratio 8.5:1
2003 -2004 Cobra Horsepower 390 hp @ 6000 rpm
2003 -2004 Cobra Torque 390 lbs.-ft. @ 3500 rpm
2003 -2004 Cobra Transmission Tremec T56 Six speed
2003 -2004 Cobra Rear end IRS 8.8″ 3.55:1 w/traction lock
2003 -2004 Cobra Suspension
2003 -2004 Cobra Front Modified Macpherson strut type with Bilstein struts, linear rate coil springs, and 29mm anti-roll bar
2003 -2004 Cobra Rear Multi-link independent with upper and lower control arms, linear rate coil springs, and 26mm anti-roll bar
2003 -2004 Cobra Brakes
2003 -2004 Cobra Front 13.0 in. (330mm) vented Brembo disc, PBR twin-piston caliper
2003 -2004 Cobra Rear 11.65 in. (296mm) vented disc, single-piston caliper
2003 -2004 Cobra Anti-lock Brakes/Traction Control Four wheel anti-lock with traction control standard
2003 -2004 Cobra Wheels/Tires
2003 -2004 Cobra Wheels 17 x 9 in. 5-spoke cast aluminum
2003 -2004 Cobra Tires Goodyear™ Eagle F1, 275/40ZR-17
2003 -2004 Cobra Other General Specifications
2003 -2004 Cobra Wheelbase 101.3
2003 -2004 Cobra Length 183.5
2003 -2004 Cobra Width 73.1
2003 -2004 Cobra Height 52.5
2003 -2004 Cobra Front/Rear Track 60.3/60.3
2003 -2004 Cobra Weight Coupe: 3665 Conv: Aprox. 150lb more

My fathers Cobra dynoed on a dyno jet at 372 with x-pipes. who ever wants to believe they have 425 to the crank and are underrated need to go speak with him. Those stat are listed directly from ford and the stats i gave are real numbers from a dyno. stop talking **** to the kid just because you retards dont want to believe he did good against a cobra. if all your going to do is bash his progress and happiness then get the FU'k out of this forum other wise shut the hell up.

Congrats man nice job.

Originally Posted by coopn8r

I didn't say they did.. It was an example.... This Cobalt isn't 300whp shoulda pointed that one out to while trying to correct me.

Originally Posted by hatrickstu

mk hoss. i mentioned handheld tuner because its just a bandaid before the car can get a good dyno tune.

so all knowing one, what exactly should this cobra be trapping?

Originally Posted by coopn8r

Still don't quite get it as on several occassions I've beaten cars that had much more whp than I did from a Roll. Though they did weigh quite a bit more.. Persay this way.. Take a Stock Mustang GT 99-04 and a Stage 2 LSJ, same whp.. A roll and the Cobalt will walk hard every time..

Originally Posted by PNYKLR-TA

that also has to do with useable power bands, the cobalt has a much more broad power band being its SC'd compared to a 4.6L N/A.

I raced plenty of honda preludes [h22's] from a roll in my GTI and i would pull away from then when really the Honda has near the same hp yet it weight significantly less.

Originally Posted by restonSS

it was prob a non s/c cobra like an 2002 or whatever. those things only have like 315 crank. thats a lot more believable...i beat those all the time.

Originally Posted by hatrickstu

because they all run the same pulleys, with all the same supporting mods. get out of here moron.

Originally Posted by hatrickstu

i wouldnt go that far...

Originally Posted by PNYKLR-TA

ok it matters because there is less friction against the ground, created by the weight of the vehicle, once the vehicle is moving the friction created deceases.

was that, really that hard to figure out?

Originally Posted by coopn8r

Okay.. I used a bad example.. The same car... 2 LSJ's with the same exact whp and same exact mods.. Now, 1 lsj has 400 pounds in weight reduction... Which one will win from a roll.? I know which one I'd put my money on.. I guess I just don't get the "physics". I do understand common sense though..

I could be wrong, I just don't see it Sorry man



2002 = Non Existant Production Car

Originally Posted by cakeeater

a 2.8" upper on a minor bolt on car will trap in the HIGH TEENS no problem. im talkin 118-119 traps.

Originally Posted by hatrickstu

because they all run the same pulleys, with all the same supporting mods. get out of here moron.

Originally Posted by 1100psi

lol...sory to break it to you....youre not hangin with a stock cobra either with our imaginary 110 traps...slow douche

Originally Posted by 1100psi

lol...sory to break it to you....youre not hangin with a stock cobra either with our imaginary 110 traps...slow douche

Originally Posted by hatrickstu

ok, simply asking for proof. thank you. like i said, im not sure exactly what pulley it was.

Originally Posted by hatrickstu

does it? can you show me this? (taking aerodynamics out of the equation) you simply claimed weight makes less of a difference the higher you go up, i dont believe this is true.

my points are as follows:

there are way more to add into this equation that power and weight. none of you have accounted for the relative aerodynamics, rolling resistance, gear ratios, or various other conditions.

for someone that is saying weight makes less of a difference the further you go, please show me proof of this. you are still trying to make the same object increase the same speed, and in a vacuum, it SHOULD take the same amount of work. therfore, the weight isnt becoming any less important, but other factors MAY play an additional large role in determining results. (ie: aerodynamics)

Originally Posted by tryit

Your on SVTP go look yourself they all run a 2.8 upper its a pretty common setup.

Originally Posted by amxguy1970

I don't have time right now to detail, but I am saying it makes less of a difference. Now taking to same HP cars with the same TQ yada and putting them into two different weight body's you know the out come. But take a more powerful car with a higher power to weight then a less powerful car with a better power to weight that difference becomes alot closer the higher they go.

I should have been more clear we are talking about two different cars with two different weights. IE cobra versus cobalt. I am not sure I have something to show but their are plenty of examples out there in the real world of racing. Pretty sure you won't be able to find a physics example of two cars racing at speed, but let me know if you do!

Tyler

Originally Posted by hatrickstu

friction decreases? how so?