Posts Tagged ‘Rat Patrol Mopar Charger drag racing muscle cars Hemi

03
Jun
14

The HELLCAT edition!!

15-la-ex-11

The Most Powerful Muscle Car in Chrysler History 

2015 Dodge
Challenger SRT® HEMI® Hellcat    Dodge-HellCat

 

With the recent release of the Challenger “Hellcat” , I thought I’d post up some interesting vids and a transcript of the Chrysler LLC executive press conference.

For those that don’t know – the Hellcat is a “package”, not just the supercharged 392 cui motor.

First a couple of sound bites –

hellcat-logo

BACKGROUND

The HellCat is named after a Grumman World War II fighter plane, used mainly on aircraft carriers; many of its 2,000-hp Pratt & Whitney engines (also used on Corsair and Thunderbolt) were made by Nash, the car company that later joined with Hudson to form AMC, which was purchased by Chrysler in 1987.

The Hellcat’s overall kill-to-loss ratio was around 19:1, beating every Japanese aircraft by at least 4:1. Only 270 were downed by aerial combat during the war (most of the planes that were lost, fell to training accidents or transport problems). (Courtesy of AllPar)

hellcat

CHALLENGER “HELLCAT” SPECS

  • 6.2 litres-  ( Reduction in stroke from the 392; the stroke was reduced to increase the strength of the camshaft, according to SRT powertrain chief Chris Cowland. It will not have MDS / cylinder shutoff.)
  • Two power modes:

–  Street mode-  Is just a little more powerful than the normal SRT…Appx 500HP.

– Kill mode – Rumoured to be 665 FWHP –  Dodge’s press release has the two modes activated by choosing one’s key fob: the black fob limits the engine to 500 hp, while the red one taps the engine’s full potential.

  • Manual transmission in Dodge Challenger, and an eight-speed automatic in Challenger and Charger; the 8HP90 can handle up to 663 lb-ft.
  • The supercharger was provided by IHI, which also sells superchargers to AMG.
  •  The 2,380cc/rev blower has integral charge coolers (sometimes incorrectly called “intercoolers”) and an integrated electronic bypass valve to regulate boost pressure, up to 80 kPa (11.6 psi). 
  • Drive ratio of 2.36:1 and a maximum speed of 14,600 rpm. The 92 mm throttle body is the largest ever used in a Chrysler Group vehicle.
  • The in-tank fuel pump accommodates variable pressures, half-inch fuel lines, and eight injectors, each capable of delivering a flow rate of 600cc/min – enough to drain the fuel tank in around 13 minutes at full power.

(Thanks to Allpar – Ed.)

Comment From Larry Velleqeutte
So why no horsepower rating yet on Hellcat? And when will it be completed? Also, any word on pricing?

Chris Cowland:
We’re still completing final calibration on the HEMI® Hellcat. The official rating numbers will be released soon. Stay tuned.

Tim Kuniskis:
As for pricing, it will be announced closer to launch

Comment From SRT_ORR
First off, kudos on making the Challenger the King of the Muscle cars again with 1971 refresh. How many units are you expected to produce in the full-bore HELLCAT trim ? or is it the “build-them-as-they-come” philosophy?

Tim Kuniskis:
Thanks! As I said in this video, this car will not be for everybody. We will gauge demand and then determine volumes.

Comment From SRT_ORR
Part two, where does the Dodge Challenger 392 Scat Pak Shaker stand amongst the SRT line-up? Will the ‘entry’ level Challenger SRT with the 392 have more goodies/different appearance? Technically speaking will things like shocks, brakes, steering etc be the same between the two?

Tim Kuniskis:
Some of the key differences between the 392 Scat Pack and the SRT 392 include: 3-mode adaptive dampening suspension, unique hood with center intake – similar to Viper, SRT performance pages with shift light, 20×9 forged aluminum wheels and available SRT Track Pack that adds larger 20×9.5 forged wheels and 15.4-inch six piston calipers

Comment From John McElroy
Is there a CD number for the aerodynamics of the car

Russ Ruedisueli:
The CD Challenger SRT Hellcat is .383, the SRT Challenger is .356

Comment From Guest
(Ditto on torque. Not even an “over 600.”)

Chris Cowland:
The power and torque rating procedure runs concurrently. All we can say today is the power will be in excess of 600 bhp and torque above 575 lb.-ft.

Comment From Tony Swan
What modifications were made to engine internals to support increased output? — Tony Swan

Chris Cowland:
The increase peak cylinder pressure of the HEMI Hellcat required that pistons, conrods and crankshaft were all upgraded. The pistons are forged, high-strength alloy and the piston pins use diamond-like-carbon coating. Ninety-one percent of the content is new.

Comment From Gary Vasilash
What percentage of the body panels are unique to the car

Mark Trostle:
The front fascia and hood are unique panels. The rear spoiler is unique as well.

Comment From Will
In the recent photos of the SRT Challenger 392 and SRT Challenger Hellcat (Beautiful and menacing BTW), they both show two different braking systems (four piston on the SRT 392 and six piston on the Hellcat). Will the Track Pack Brembo Brake option upgrade the four pistons to six pistons on the SRT 392?

Tim Kuniskis:
Yes indeed – the SRT 392 offers an SRT Track Package that includes the larger 20×9.5 forged aluminum wheels, larger brakes and Pirelli P Zero tires.

Comment From SRT_ORR
Are the tire’s 275 all around or are the backs staggered?

Russ Ruedisueli:
275’s all around are standard on the SRT Hellcat, they are optional on the Challenger SRT

Comment From Guest
Can you tell us something about peak rpm and torque? — Tony Swan

Chris Cowland:
Peak power is produced at 6,000 rpm?

Comment From David Zatz
Roughly how far does the black key fob (and the Valet Mode) reduce power?

Russ Ruedisueli:
The red key is the only one that will unlock the maximum power available from the engine. The black key limits output to 500HP.

Comment From Guest
Is it true the Supercharger was designed in house at Chrysler to optimize performance?

Chris Cowland:
The supercharger’s design and specifications were developed jointly between Chrysler Group SRT and IHI.

Comment From Christopher A.
Why utilize a 6.2L engine when the 6.4L already existed?

Chris Cowland:
The displacement of the HEMI Hellcat was reduced from the 6.4-liter HEMI via a stroke decrease to 90.9 mm in order to increase the strength of the crankshaft.

Comment From Christopher A.
Did you look at turbo charging vs supercharge
Chris Cowland:
The supercharged option offers a better match to the vehicle characteristics we were targeting, specifically instant throttle response and low-speed torque

Comment From Tony Swan
Can you furnish bore x stroke for the 6.4 and 6.2 please?

Chris Cowland:
The 6.4-liter HEMI is 103.9 x 94.6; the HEMI Hellcat is 103.9 x 90.9

Comment From Will
Will the exterior colo(u)rs be available year round or will certain colo(u)rs – H.I.P col(u)rs – will be limited one time offerings?

Mark Trostle:
The vehicle will be launched with 11 exterior colors. B-5 Blue and Sublime will be the first high-impact colors to be introduced.

Comment From John McElroy
I didn’t know that IHI made superchargers (turbos yes). Why did you go with an unproven blower supplier in your first effort with a supercharger? (Great example of a journo NOT doing their research! – Ed.)

Chris Cowland:
We evaluated all of the current supercharger suppliers during the early stages of the program, relative to efficiency, power and torque requirements. IHI was selected as the best match to our requirements. They have very solid track record of supplying superchargers for high-end products such as AMG Mercedes.

Comment From Lindsay Brooke
I’m assuming the Hemi cylinder block for the Hellcat V8 is cast iron–correct? Why hasn’t Chrysler offered a factory AL block for the high-output SRT versions of this V8, considering an AL block would take 50-70lb off the vehicle’s front end?

Chris Cowland:
The bearing loads of the HEMI Hellcat demand the need for very high-strength block bulkheads. Cast-iron offers the best solution within the geometry of the HEMI family

Comment From guest
what about 1/4 times and speeds

Chris Cowland:
Bloody fast

Comment From -Brian
what upgrades to the rear end were made to accommodate increased power. we tend to leave bits and pieces on the track.

Russ Ruedisueli:
The entire SRT drive line was upgraded. That includes prop shafts, axles , 1/2 shafts, and cooling.

Comment From D. Jackson
Is the Hellcat using mass air EFI

Chris Cowland:
MAF is used for bypass, throttle and OBD controls

Comment From Christopher A.
What was the biggest challenge in producing the numbers you wanted

Chris Cowland:
We defined an SRT requirement for the HEMI Hellcat that included the ability to complete 20 minutes of full-speed track driving in extreme ambient temperatures without the need for cooling-system-driven derate. This places significant burden on the cooling capacity of the vehicle.

Comment From Lindsay Brooke
Is the IHI blower a Lysholm or Roots unit?

Chris Cowland:
Screw-type

Comment From David Zatz
Do you have any idea on top speed? Do we have a match for the 1969 Dodge Charger Daytona?

Tim Kuniskis:
Nice try…

Comment From D. Jackson
What are all of the adjustable options for performance?

Russ Ruedisueli:
The drive modes allow the customers to choose shock settings, steering assist levels, horse power, traction settings, auto transmission calibration/shift points. There are over 125 different combinations

Comment From Tony Swan
What is Hellcat final drive?

Chris Cowland:
3.70 for MT; 2.62 for AT

 

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