Hellcat Challenger Dyno Test
Mopar Muscle dyno tests a 2015 SRT Hellcat Challenger on the Dynojet chassis dyno at Kenne Bell Performance. We compare it to dyno tests of a stock 2013 ZL1 Camaro and 2013 Shelby GT500.
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00:00 Hello Mopar Muscle readers, this is Johnny Hunkins from Mopar Muscle Magazine and today
00:17 as you can see we are at Kenny Bell Superchargers in Rancho Cucamonga, California and we're
00:23 here for a very special reason, we're actually going to go into their dino facility, they
00:30 do a lot of development for supercharger kits and one of the things they have is a dino
00:37 jet dino that's all kinds of instrumentation on it and we're going to do a chassis dino
00:45 test for the very first one on the brand new 2015 Dodge Hellcat Hemi Challenger.
00:56 Well here we are underneath the Hellcat and I don't think anybody has been under here
01:02 to document what is under one of these bad boys but right off the bat you can see that
01:09 the bottom of the Hellcat Hemi is designed for aerodynamics, there's pretty much a sealed
01:16 shield here that is keeping the aerodynamics flush underneath the car and from below you
01:24 basically can't see the oil pan or any parts of the suspension or the steering and that's
01:29 just to keep the ground effect, basically to keep the car glued to the ground at high
01:36 speed, this car of course has a top speed of 199 miles an hour.
01:41 Here you see the dual exhaust, those are twin 2 and 3/4 inch exhaust tubes, stainless steel,
01:49 you have the catalyst there, there's dual catalyst, there's a pre-cat that you can't
01:54 see and then there's these cats here and then it goes twins all the way to the back, there
01:59 is an X type crossover and then it goes above the axle there so you can sort of see what
02:05 this thing is designed to do here, it's designed to flow a whole lot of exhaust at full throttle.
02:15 Up top here you can see the Hellcat engine is prepared for the dyno, a couple of things,
02:21 we've got a sensor on one of the plug wires there so we get a good tac signal but also
02:28 on the fuse box the ABS fuse relay has been pulled that way we don't get any false activation
02:35 from the ABS system while it's on the dyno.
02:38 Of course the rear wheels are going to be spinning madly with the front wheels in one
02:43 place so we don't want anything activating, we want the full readout of the engine.
02:51 Of course we all know by now that the factory rates the Hellcat at 707 horsepower but what
02:59 does that translate to with the rear wheels?
03:01 That's what we're going to find out today.
03:04 Now over here at Kenny Bell they have a dyno jet, chassis dyno which is a very common dyno,
03:10 many guys use to tune their cars or to find out what kind of power they've got and this
03:15 is an inertial dyno and it has specific peculiarities that are unique to inertial dynos so the numbers
03:25 might not exactly match up to the factory numbers but it will most surely match up to
03:31 what you're used to seeing when you see dyno numbers on other cars.
03:35 Now Kenny Bell has developed supercharger kits for many other popular late model performance
03:42 cars for instance Camaros, Chargers, Challengers, Mustangs, all kinds of trucks, supercharged
03:50 Mustang Cobras so what we're going to be able to do is see how well the Hellcat Hemi measures
03:58 up to some of the other cars out there at the rear wheels.
04:03 This is Ken Crystal at Kenny Bell Performance and he's one of their top tech guys, he's
04:11 got a laptop hooked up to the CAN bus here on this Hellcat Challenger and it looks like
04:17 you're reading some of the data right off of the factory computer here, tell us what
04:22 you've got going.
04:23 Okay I'm going to read ignition timing, I'm going to read the pedal voltage, the VE of
04:30 the engine, the cat model temperature, desired air fuel ratio, we're going to get pulse width,
04:37 engine speed, knock, we're going to look at the manifold air pressure and then of course
04:45 the map, we want to know what that is.
04:48 Well that's going to be very cool, we're going to be able to find out exactly what's going
04:51 on when we dyno this thing.
04:53 Well right there it looks like 625 horsepower and at 6200 RPM which is the fuel shut off
05:17 for this engine and as you can see it's climbing, when it hits red line it's still going up,
05:27 there's some snot left in this engine folks, we just got to figure out a way to get it
05:32 out.
05:38 Now we're going to try a run in fourth gear again, 626 horsepower, look at that curve,
06:01 look at that.
06:03 Now that green one, that's representative of the Z01 Camaro, is that right?
06:09 Yeah Z01 Camaro, that was a green curve there is a bone stock LSA powered Camaro and you
06:18 can see that that thing about 450 horsepower to the tire and this thing is just going to
06:24 eat it's lunch.
06:28 We are here with Jim Bell of Kenny Bell Performance and one of the reasons we're here is because
06:33 Jim is an engineer and he designs and builds and sells blower kits for Chevy, Ford and
06:39 Mopar, he has no specific brand loyalty here which is one of the reasons we are here to
06:45 shop dynoing but he also is an expert in superchargers and we actually have at our disposal, we have
06:53 dyno runs of completely stock Z01 Camaro and Shelby GT500 Mustangs and we're going to right
07:03 now compare those.
07:05 Jim tell us what we've got here on the graphs and how does the Hellcat stack up compared
07:12 to it's natural competition?
07:14 Well we have three 100% stock vehicles, the Camaro Z01 which was the 12 to 14 car, we
07:25 have the 13 to 14 Shelby GT500 which is the green line, the Camaro being the bottom red
07:32 line and then the new Hellcat, the blue line on top.
07:37 All three cars were 100% stock right off the showroom floor, no tuning, no exhaust, no
07:43 games and that was the horsepower all three developed which is shown over here.
07:52 Also worth noting is that the Camaro and the Dodge were both set at factory speed limiters
08:00 62 to 6300 where the Shelby has a 7000 RPM speed limiter which is why there is some disparity
08:07 in the green versus the blue and red.
08:11 Now I'm going to kind of throw you a softball here, when you look at the graph for the Hellcat
08:17 and you see such a steep climb right before the artificial RPM shut off, what does that
08:24 tell you as a tuner?
08:29 That tells me that the way the cars are produced, the way you would buy them, again disregarding
08:35 we're going to change timing or this or other factors in the tune which you can do to all
08:40 three, this tells me that the Hemi definitely makes more power than the Camaro or the Shelby
08:48 GT500.
08:51 What's interesting about those curves if you look a little closer at them is the Hemi,
08:55 the blue line is still climbing and at 7000 it's going to put out quite a bit more horsepower
09:01 than it does at the 6200 where the Camaro is pretty well flat lined and the Shelby is
09:10 just gradually rising.
09:12 You can see by the steepness of the curve that this thing is going to make about 650
09:17 at 7000 which is considerably over what Chrysler has got it rated at.
09:24 Well there you have it guys.
09:25 It looks like the Hellcat has a lot more snot buried in it.
09:31 All we have to do is get at it.
09:33 Looks like this is going to be a really great opportunity for tuners everywhere and so it's
09:39 just a matter of getting a couple more out in the marketplace and letting people like
09:43 Jim Bell at this thing, see what they come up with.
09:47 So look for the story on the dyno test of the 2015 SRT Hellcat Challenger in the April
09:56 2015 issue of Mopar Muscle Magazine.
09:59 Thanks for watching.
10:00 We'll see you soon.
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