2015 Challenger Hellcat 707 HP

[DanSS24]

http://www.motorauthority.com/news/1...ideo?fbfanpage

My question to this is...How does one figure a drivetrain loss of 12% of the Hellcat and 10% of the ZL1? They both have superchargers and lots of damn accessory drives. Is it the transmission? Btw, did GM overrate the ZL1's numbers or is somebody getting this all wrong?

[archtaan]

Originally Posted by DanSS24

http://www.motorauthority.com/news/1...ideo?fbfanpage

My question to this is...How does one figure a drivetrain loss of 12% of the Hellcat and 10% of the ZL1? They both have superchargers and lots of damn accessory drives. Is it the transmission? Btw, did GM overrate the ZL1's numbers or is somebody getting this all wrong?

Drivetrain loss is everything behind the crank.

Transmission, drive shaft, rear end, axles, tires. The bigger and beefier they are, the more power they take to turn.

The ZL1 is SAE certified so it's not over or under rated. Same with the hellcat. They only allow a 1% deviation to get that certification.

[URBAN LEGEND]

When was this announced? Is it fast?

[MEDISIN]

Finally a 6-speed manual Hellokitty review courtesy of Edmunds.

The six-speed Hellcat proved much more, well, challenging to launch. The Tremec transmission in the test car needed mighty heaves to find its gears, and it was particularly easy to blow the 1-2 upshift. The clutch is heavy and unforgiving, only fully engaging at the very top of the pedal's long travel. You can literally feel the tendons in your legs tightening as you strain against the clutch pedal. And your left leg can tire in regular traffic.

Using the Launch program with the manual transmission is practically as straightforward as with the automatic — and the process is practically identical. But there's simply no way to shift manually as efficiently and cleanly as the automatic does. So there's more tire smoke, less instant rocketry and, yes, less raw acceleration.

A 12.8-second blast down the quarter-mile with a spectacular 118.4-mph trap speed with the traction control on is nowhere near slow. And zero to 60 mph in 4.8 seconds with a slight blue-gray haze accompanying the car is still quick. But it's simply not as quick as the automatic car felt and self-reported up in Oregon. And it may be that another manual-equipped Hellcat with a fresher clutch and transmission may be easier to manage on a drag strip.

Edmunds: 0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph; 4454lbs

Let's see how that compares to Edmunds reviews of the GT500 and ZL1 equipped with manual transmissions.

GT500: 0-60, 3.9sec, 1/4mile 12.1 @ 120.6mph
ZL1: 0-60, 4.1sec, 1/4mile 12.4 @ 116.0mph
Failcat:0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph

Hmmmmmmmm...

[tones2SS]

Originally Posted by MEDISIN

I am GRATEFUL the Viper exists - it is a raw American sports car without question. The problem is it costs waaaaay too much for its performance and overall packaging. IMO the Viper needs a base model priced closer to the Corvette ($6X,XXX or so).

I will agree with that!!!

Originally Posted by MEDISIN

Using the Launch program with the manual transmission is practically as straightforward as with the automatic — and the process is practically identical. But there's simply no way to shift manually as efficiently and cleanly as the automatic does. So there's more tire smoke, less instant rocketry and, yes, less raw acceleration.

A 12.8-second blast down the quarter-mile with a spectacular 118.4-mph trap speed with the traction control on is nowhere near slow. And zero to 60 mph in 4.8 seconds with a slight blue-gray haze accompanying the car is still quick. But it's simply not as quick as the automatic car felt and self-reported up in Oregon. And it may be that another manual-equipped Hellcat with a fresher clutch and transmission may be easier to manage on a drag strip.[/I][/INDENT]Edmunds: 0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph; 4454lbs
Let's see how that compares to Edmunds reviews of the GT500 and ZL1 equipped with manual transmissions.
GT500: 0-60, 3.9sec, 1/4mile 12.1 @ 120.6mph
ZL1: 0-60, 4.1sec, 1/4mile 12.4 @ 116.0mph
Failcat:0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph
Hmmmmmmmm...

Sounds like once you get traction down, that car is going to really move out. Maybe suspension modifications would help a lot.
But man,............that GT500 really sets the stage here. What a beast of a car.

[Whos_Drivin]

Originally Posted by MEDISIN

Finally a 6-speed manual Hellokitty review courtesy of Edmunds.

The six-speed Hellcat proved much more, well, challenging to launch. The Tremec transmission in the test car needed mighty heaves to find its gears, and it was particularly easy to blow the 1-2 upshift. The clutch is heavy and unforgiving, only fully engaging at the very top of the pedal's long travel. You can literally feel the tendons in your legs tightening as you strain against the clutch pedal. And your left leg can tire in regular traffic.

Using the Launch program with the manual transmission is practically as straightforward as with the automatic — and the process is practically identical. But there's simply no way to shift manually as efficiently and cleanly as the automatic does. So there's more tire smoke, less instant rocketry and, yes, less raw acceleration.

A 12.8-second blast down the quarter-mile with a spectacular 118.4-mph trap speed with the traction control on is nowhere near slow. And zero to 60 mph in 4.8 seconds with a slight blue-gray haze accompanying the car is still quick. But it's simply not as quick as the automatic car felt and self-reported up in Oregon. And it may be that another manual-equipped Hellcat with a fresher clutch and transmission may be easier to manage on a drag strip.

Edmunds: 0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph; 4454lbs

Let's see how that compares to Edmunds reviews of the GT500 and ZL1 equipped with manual transmissions.

GT500: 0-60, 3.9sec, 1/4mile 12.1 @ 120.6mph
ZL1: 0-60, 4.1sec, 1/4mile 12.4 @ 116.0mph
Failcat:0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph

Hmmmmmmmm...

All I have to say is....

[DanSS24]

Originally Posted by archtaan

Drivetrain loss is everything behind the crank.

Transmission, drive shaft, rear end, axles, tires. The bigger and beefier they are, the more power they take to turn.

The ZL1 is SAE certified so it's not over or under rated. Same with the hellcat. They only allow a 1% deviation to get that certification.

Thanks...(and not trying to be an ass) but how do they come out with 12% or 10%? I checked the ZL1 section and I see some with 10-15%, given the formula of RWHP divided by crank HP. With the Hellcat at 635 rwhp...divide that by 707 and I come out with 11%. On some of the ZL1's, I see 494 to 516+ rwhp. So where did 12% come from? Is there a formula to determine driveline loss?

[HEMI DAVE]

Originally Posted by MEDISIN

Finally a 6-speed manual Hellokitty review courtesy of Edmunds.

The six-speed Hellcat proved much more, well, challenging to launch. The Tremec transmission in the test car needed mighty heaves to find its gears, and it was particularly easy to blow the 1-2 upshift. The clutch is heavy and unforgiving, only fully engaging at the very top of the pedal's long travel. You can literally feel the tendons in your legs tightening as you strain against the clutch pedal. And your left leg can tire in regular traffic.

Using the Launch program with the manual transmission is practically as straightforward as with the automatic — and the process is practically identical. But there's simply no way to shift manually as efficiently and cleanly as the automatic does. So there's more tire smoke, less instant rocketry and, yes, less raw acceleration.

A 12.8-second blast down the quarter-mile with a spectacular 118.4-mph trap speed with the traction control on is nowhere near slow. And zero to 60 mph in 4.8 seconds with a slight blue-gray haze accompanying the car is still quick. But it's simply not as quick as the automatic car felt and self-reported up in Oregon. And it may be that another manual-equipped Hellcat with a fresher clutch and transmission may be easier to manage on a drag strip.

Edmunds: 0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph; 4454lbs

Let's see how that compares to Edmunds reviews of the GT500 and ZL1 equipped with manual transmissions.

GT500: 0-60, 3.9sec, 1/4mile 12.1 @ 120.6mph
ZL1: 0-60, 4.1sec, 1/4mile 12.4 @ 116.0mph
Failcat:0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph

Hmmmmmmmm...

That's HORRIBLE!!

[Front Runner]

Originally Posted by MEDISIN

Finally a 6-speed manual Hellokitty review courtesy of Edmunds.

The six-speed Hellcat proved much more, well, challenging to launch. The Tremec transmission in the test car needed mighty heaves to find its gears, and it was particularly easy to blow the 1-2 upshift. The clutch is heavy and unforgiving, only fully engaging at the very top of the pedal's long travel. You can literally feel the tendons in your legs tightening as you strain against the clutch pedal. And your left leg can tire in regular traffic.

Using the Launch program with the manual transmission is practically as straightforward as with the automatic — and the process is practically identical. But there's simply no way to shift manually as efficiently and cleanly as the automatic does. So there's more tire smoke, less instant rocketry and, yes, less raw acceleration.

A 12.8-second blast down the quarter-mile with a spectacular 118.4-mph trap speed with the traction control on is nowhere near slow. And zero to 60 mph in 4.8 seconds with a slight blue-gray haze accompanying the car is still quick. But it's simply not as quick as the automatic car felt and self-reported up in Oregon. And it may be that another manual-equipped Hellcat with a fresher clutch and transmission may be easier to manage on a drag strip.

Edmunds: 0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph; 4454lbs

Let's see how that compares to Edmunds reviews of the GT500 and ZL1 equipped with manual transmissions.

GT500: 0-60, 3.9sec, 1/4mile 12.1 @ 120.6mph
ZL1: 0-60, 4.1sec, 1/4mile 12.4 @ 116.0mph
Failcat:0-60, 4.8sec; 1/4mile 12.5 @ 118.8mph

Hmmmmmmmm...

The 8-speed automatic Hellcat review, courtesy of Edmunds. (taken from the same story mentioned above)

Link:

http://www.edmunds.com/dodge/challen...road-test.html

Just How Fast Is It in a Straight Line?

Edmunds has experienced the Hellcat twice on the drag strip, once with the eight-speed automatic at the press preview in Portland, Oregon, and once with the six-speed manual transmission at our usual Southern California test venue.
On Portland Raceway's quarter-mile drag strip, the automatic-equipped Hellcat simply shot forward using the simple technique of hitting the Launch button in front of the gear selector, pushing hard with the left foot on the brake pedal, stomping the gas pedal to the floor, then releasing the brake pressure completely. Wheelspin is moderated by the launch control system and shifts are violently quick. All you have to do is steer and keep your right foot firmly planted.

After our acceleration run, the in-car performance meter gave us an estimated quarter-mile time of 11.4 seconds. This supports the NHRA-certified 11.2-second run that SRT claims to have achieved on street tires. We're told that the top speed is 199 mph and it's not electronically limited. There's only so much air even 707 hp can push.

[SpeedIsLife]

It's really no secret that Dodgehas made the 8 speed auto the preferred transmission. most auto companies are starting to fade out manuals

[96MrBass]

The article says its a full second quicker than the GT5 lol. Yeah

[Whos_Drivin]

Originally Posted by Front Runner

The 8-speed automatic Hellcat review, courtesy of Edmunds. (taken from the same story mentioned above)

Link:

http://www.edmunds.com/dodge/challen...road-test.html

Just How Fast Is It in a Straight Line?

Edmunds has experienced the Hellcat twice on the drag strip, once with the eight-speed automatic at the press preview in Portland, Oregon, and once with the six-speed manual transmission at our usual Southern California test venue.
On Portland Raceway's quarter-mile drag strip, the automatic-equipped Hellcat simply shot forward using the simple technique of hitting the Launch button in front of the gear selector, pushing hard with the left foot on the brake pedal, stomping the gas pedal to the floor, then releasing the brake pressure completely. Wheelspin is moderated by the launch control system and shifts are violently quick. All you have to do is steer and keep your right foot firmly planted.

After our acceleration run, the in-car performance meter gave us an estimated quarter-mile time of 11.4 seconds. This supports the NHRA-certified 11.2-second run that SRT claims to have achieved on street tires. We're told that the top speed is 199 mph and it's not electronically limited. There's only so much air even 707 hp can push.

All good and wonderful if you put a lot of stock in "estimated quarter-mile" times.

[MEDISIN]

Originally Posted by Front Runner

http://www.edmunds.com/dodge/challen...road-test.html

Just How Fast Is It in a Straight Line?

After our acceleration run, the in-car performance meter gave us an estimated quarter-mile time of 11.4 seconds. This supports the NHRA-certified 11.2-second run that SRT claims to have achieved on street tires. We're told that the top speed is 199 mph and it's not electronically limited. There's only so much air even 707 hp can push.

Thanks for sharing.

[MEDISIN]

Originally Posted by 96MrBass

The article says its a full second quicker than the GT5 lol. Yeah

With 662 hp, it started this latest muscle car power war but it's a full second slower than the claimed performance of the automatic Hellcat in the quarter-mile.