2015 Dodge Challenger RT Scat Pack
Patrick Rall's picture

Kenne Bell Hellcat Blower Kit Takes the Challenger Scat Pack to 901hp

The folks from Hot Rod recently took the 2015 Dodge Challenger SRT Hellcat to the Kenne Bell Performance dyno facility in Rancho Cucamonga, California and during the piece detailing that dyno testing, Hot Rod mentioned that Kenne Bell is working on a Hellcat-like supercharger system for the 2015 Challenger Scat Pack that will lift the output to 901 horsepower.

The 2015 Dodge Challenger SRT Hellcat is the most powerful production muscle car of all time, with 707 horsepower from a supercharger 6.2L Hemi V8, but for those who cannot pony up the $60k+ price tag of the Hellcat model, the 2015 Challenger R/T Scat Pack offers impressive performance for under $40k. In fact, with 485 horsepower and 475lb-ft of torque offered by the naturally aspired 6.4L Hemi makes it more powerful than any of the competitors’ vehicles, shy of the high priced Camaro Z28 and ZL1. The Scat Pack is a great option for those who want something a little more budget friendly than the Hellcat, but that huge power differential could prove to be a problem for some.

Fortunately, the folks the Kenne Bell Performance are working on a supercharger package that could lift the output from 485 to 901 horsepower. That is 901 horsepower, according to the folks at Hot Rod.

Kenne Bell Hellcat Blower Package
There are plenty of people who doubt that the 2015 Dodge Challenger SRT Hellcat actually makes 707 horsepower, so the folks from Hot Rod took the most powerful muscle car ever to the Kenne Bell Performance facility for some proper dyno testing. During that testing, Hot Rod found that the Hellcat Challenger’s advertised 707hp and 650lb-ft of torque translates to 620 horsepower and 579lb-ft of torque at the rear wheels. That represents a power loss of about 12% for the Hellcat when compared to the advertised figures and all of these numbers are very impressive.

However, amidst the piece detailing their dyno testing for the Hellcat Challenger, Hot Rod mentioned that Kenne Bell is working on a 4.2L Hellcat style supercharger for the 392 cubic inch Hemi in the R/T Scat Pack and the SRT 392 Challengers. According to Hot Rod, this 4.2L supercharger package from Kenne Bell will lift the output of the 392 Challenger up to 901 horsepower.

Yes, 901 horsepower.

How KB Will Hit 901
Considering that the mighty Hellcat Hemi “only” produces 707 horsepower, it might seem hard to imagine a 392 Hemi churning out 901 horsepower, but there are a few things to consider. First, the IHI top-mounted supercharger on the Hellcat Hemi is a 2.4L design, whereas the Kenne Bell blower is expected to be around 4.2L. That extra air volume will allow the engine to take in more air and more fuel, and with more air and fuel comes more power. Also, the Hellcat Hemi is only 6.2 liters, while the 392 is 6.4 liters, to the extra bit of engine volume will allow Kenne Bell to squeeze out a few more ponies.

Finally, and most importantly, we should keep in mind that when the SRT engineers designed the Hellcat Hemi, they had to make sure that it reached certain fuel economy and emission requirements. If Chrysler didn’t have to put any concern into efficiency, they could have most certainly built the Hellcat Hemi to make far more than 707hp. Luckily, the folks from Kenne Bell don’t have to worry about that, so provided that they can pass California emission tests, they can get as crazy as they want with tuning.

When you add in a bigger supercharger, a bigger engine and far fewer restrictions, Kenne Bell shouldn’t have any problem making more than 707hp – although 901 still seems extreme to me.

In addition to the 4.2L blower, I would imagine that the Kenne Bell 901hp package for the 2015 Challenger R/T Scat Pack will come with fuel system upgrades and possibly some other engine components to improve durability and longevity.

Hellcat Killer for Under $50k
The most intriguing aspect of the Hellcat-like blower package from Kenne Bell (after the 901hp) is the price. According to Hot Rod, this package will only cost around $7000, so if you bought a 2015 Challenger R/T Scat Pack for around $40,000, adding the $7,000 KB blower package and a good set of sticky rear tires will have you spending under $50,000 for a car with almost 200 more horsepower than the Hellcat Challenger. Of course, that doesn’t include any of the other aspects of the SRT package, but for those looking to go drag racing – the Kenne Bell blown Scat Pack could be the new King of the Hill.

Source: Hot Rod

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Comments

Nice article .however it is not a roots style blower it is a twin-screw on the hellcat which is completely different. yes its a positive displacement blower that's the only similarity.
You are correct. I did incorrectly label the design of the Hellcat IHI blower as being a roots design. I was looking to focus on the top-mounted design, which I have clarified in the piece. Thank you!
I read on a Kenne Bell website that his blowers are only for in-house sales and I couldn't buy one unless I bought one of his engines. So how would anyone buy a blower for their 6.4L???? Thank you, Eric. Milan, Mi
Eric, not sure on our website where you saw we only use them for "in house" but you are mistaken. We sell "Factory Direct" and also have a dealer network.
901 hp from a stock 392???? Quit smoking crack
The 392 internals are tissue paper and it will fall apart maybe a older 6.1 might take it but either one can't and hold together with out internal changes
This is useless... sure spend 7k to get 900 hp...but blow out your internals and rear end in no time since they are standard Scat-pack equipment. you got to think more of just horsepower. The hellcat was created from the ground up to handle all 707 hp internally everywhere...with a warranty.
Lets look at owners such as my daughter who owns a 2012 392 Challenger with the 6.4 engine. She enjoys cruising during the summer and getting decent mileage around 18 mpg. Adding a huge super charger drags that down into the single digits. The best and least expensive add on is nitrous. Nitrous kits are becoming safer and very high tech protecting engine components. I was told the 392 can handle up to 700 hp without doing anything to the internals but after that heads, cam, and crank needs replacing. A 200-250 hp set up with nitrous and the necessary engine mods still will only set you back around $10-15k installed. You will still be able to achieve 20 mpg highway and 16 combined when cruising.
I recently bought a 2016 rt scatpack... I am interested in a little boost. What kind of nos system are you talking about? If I have to worry about damaging anything internal I'd like to stay away from it. Any info would be greatly appreciated. -Brandon
2015 srt chargerI want 1supercharges email me soon as they come available
please email need to notify me as they come available wanted to know what would the cost be to go ahead and do this
Kenne Bell manufactures great blowers but their marketing is pure 20th century. If you read the comments on the many forums, you can see the huge number of potential buyers will never touch a blower because of the complexity of ownership. You should install forged internals if you want ANY peace of mind or longevity. So, they balk on buying. Then you have all the decisions about upgrading fueling components and a garage that can properly tune the thing. So, they balk on buying. And you have to find a competent garage that can properly install it. So, the average wannabe blower owners balk at buying. Does the average buyer feel like he can install the unit, have the 392 hemi hold together with stock internals putting up with 901 horsepower? Can the average guy properly tune this set-up? Lastly, a buyer who can buy a supercharger for a Fox body for $2500, doesn't look at Kenne Bell blowers at $8,000 being a reasonable value. So why is Kenne Bell marketing 20th century? Because they need to establish a network of garages who can upgrade the internals, install the unit expertly, then tune it...expertly, AS A PACKAGE. THEN Bell can increase sales 10-fold after the volume of sales allows them to drop the price $1500. A win-win for Kenne Bell and consumers. As it stands now, I would love a Kenne Bell blower on my 2015 Scat Pack Challenger. But I'm just keep hearing about stock engines grenading, nightmare hatchet-job installations, garages that can't tune a riding mower pretending they can tune a supercharged engine. And all of this taking months of migraines. Who needs all this grief? Yes, Kenne Bell will always sell their excellent superchargers to the low volume demographic of very competent racers and skilled wrenches. But they could have sales go through the roof is they set up a market for owners without that level of expertise.
1'm a lifelong Mopar guy who now lives vicsriously thru his oldest son. He has a C5 Z06 Corvette with stock internals that now has 911rwhp. You read that correctly. The only things we changed were the camshaft and the valve springs. His secret to making it live is methanol. Lots of it. We did all the work ourselves in his garage. I dont recommend it for beginners but the internet is full of good information. We had to seriously upgrade the fuel system and we've now upgraded the driveline components but it lives. Just saying it can be done but great care must be taken. Still has very good street manners and fuel mileage doesn't until the boos guage moves to the right. We used a Vortec YSI blowe with a 3.35 pulley. It can be done. And if you've never been in one that fast, you're missing out.
Completely believable. Jesse Iwuji among others have Challengers putting out around 1000hp. My only concern is longevity. The block in and several other features of the Hellcat engine are engineered far beyond what any other hemi or competition can do. Strength and thermal efficiency. Doesn't mean much if it shuts down in 5 minutes like the Z06 or self destructs after 5k.
Nice idea in theroy. Now seeing as the hellcat has a forged crank, rods, and pistons wouldnt the better idea be to lose the tiny 2.4 blower on the hellcat for a larger one? Say the same kb 4.2? Upgrade the fuel pump and i dont see why a hellcat cant put down 1000rwhp
I have a 2015 Scat Pack,I want the 900 hp, but have my reservations, so what do I have to do to get 700 hp, Ive added the CAI, and the Hellcat tube. Just want to be able to get 50K miles without replacing the engine.
First off you should have bought the 392 and then considered the Kenny Bell upgrade to 700 hp. The cost of around $15k for the super charger and added parts. With the Scat Pack you need additional upgrades that the 392 has already which will set you back another $7k or more. I tell anyone who will listen to wait until the hellcat craziness is over like me and order a new one. I'm waiting until 2017 to decide on the hellcat charger or Camaro ZL1. A test drive will seal the deal. If the ZL1 has the LT4 Z06 engine with 640 hp and being only 3600 lbs it just might be faster than the hellcat.
Or just wait a few years & get a low mileage one owner for cheap. Prices won't jump on them til their extinct.
The drive train on the Scat Pack is identical to the 392 SRT. Not sure to what you're referring when you say he should have gone with the 392 instead of the Scat Pack. The biggest differences are better brakes, bigger wheels and tires (275 40x20, 9.5" rim vs 245 45x20, 9" rim), interior options, and semi-active shocks on the SRT. OH, AND $7200 MORE MOOLAH OUT THE DOOR. Or did I miss what you meant? I am getting old. I even have semi-fond memories of my 1969 GTX, bloodied knuckles, oil leaks, dead ignition resistors, broken starters (had to replace one once in a parking lot in Malone, NY, in -22 F weather after loosening headers), taking out the greasy pumpkin, which immediately dropped onto my chest immobilizing me to the delight of my buddy who, when he caught his breath, said, "I told you it will be heavier than you think it'll be . . ., and much more. So, no offense meant.
The scatpak has forged internals!
ScatPac has a forged crank but cast cracked cap rods and hypereutectic pistons.
Happy to say I've been driving my 2015 R/T 392 with SCAT pack with the 6 speed manual for 9 months now, got it used but one owner. She has seen 287kmh with lots of guts left, I ran outta road... Believe it or not I'm driving her daily on studded winters (the wider hellcat size) and she handles great. I would appreciate advise on what mods will provide what benefits and where to find them.