Chris brought us his Destroyer Grey 2018 Dodge Charger SRT 392 to get the 6.4L HEMI boosted! Up first in the shop, John removed the factory ECU so that it could be overnighted to HP Tuners and unlocked for calibration, and then moved on to installing the Stage-II 2.9L W175AX twin-screw unit from Whipple Superchargers, including their upgraded air-intake system, along with the miscellaneous OEM and aftermarket odds-and-ends to bring it all together.
With the mechanical work wrapped, Matt strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. With the Whipple 2.9L delivering 7psi, and a 100% factory exhaust system in place, Vlad increased the 392’s output to a repeatable 618.28whp & 575.66lbft! Considering these cars normally baseline around 400whp & 385lbft on our dyno, that’s an increase of over 200whp & 190lbft!
Bob brought us his 2016 Dodge Challenger SRT 392 to have her put under some pressure! Up first in the shop, Andrew set the 6.4L HEMI up with a Stage-II 2.9L W175AX twin-screw unit from Whipple Superchargers, including their upgraded air-intake system, along with the miscellaneous OEM and aftermarket odds-and-ends to bring it all together.
Then, Matt strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. With the Whipple 2.9L delivering 8psi, Vlad increased the 392’s output to a repeatable 652.15whp & 602.42lbft! Considering these cars normally baseline around 400whp & 385lbft on our dyno, that’s a gain over 250whp & 200lbft! Pretty impressive considering this car has 100% factory exhaust system in place.
Matthew brought us his Sublime Green 2015 Dodge Challenger R/T Scat Pack to get the 6.4L Hemi breathing a lot better and thumping a lot harder! Up first, Alex installed a custom VVT camshaft from Cam Motion, supporting valvetrain components from COMP Cams & Manley Performance Products, Inc., engine oil pump from Melling Performance Parts, mid-pipe from Stainless Works, aluminum radiator and 180° thermostat from Mishimoto Automotive, OEM Hellcat 92mm throttle body, along with OEM Mopar components to delete MDS, and all the miscellaneous OEM odds-and-ends to complete the installation, all breathing through the existing Mopar Performance air-intake system.
With the mechanical work wrapped in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. The results? Even with the factory exhaust manifolds in place, Vlad still increased the 6.4L Hemi’s output to 472.40whp & 482.77lbft — that’s a gain of 70whp+ & 80lbft+ over what these cars normally put down in stock form on our dynos! Solid outcome all around.
Mike brought us his daily driven 2018 Jeep Grand Cherokee Trackhawk for the first round of modifications! Up first, Justin set the supercharged 6.2L Hemi up with a Metco 2.75″ upper pulley, Metco billet idler, Injector Dynamics ID1050X fuel injectors, Mishimoto Automotive 160° thermostat, all topped off with a JLT Performance air-intake system.
With the mechanical work wrapped in the shop, Charlie strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. The result? 784.93awhp & 735.06lbft on 93 octane! That will certainly make the daily commute more interesting…
Check out a few of our other Jeep / Dodge builds below:
Chris brought us his baby blue powder coated Whipple Superchargers 2.9L W175ax twin-screw equipped Bright White 2016 Jeep Grand Cherokee SRT from Maryland for some attention! After a brief pre-tune mechanical inspection in the shop, Charlie strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. With the Whipple delivering ~7psi, Vlad increased the 6.4L Hemi’s output to 601.54awhp & 511.63lbft on 93 octane! Absolute sleeper of a Grand Cherokee!
See dyno video below.
Check out a few of our other Jeep / Dodge builds below:
Ethan brought his Whipple Superchargers Gen-III 2.9L W175ax twin-screw equipped 2018 Jeep Grand Cherokee SRT in for some attention! With the previous calibration offering some less than desirable part-throttle behavior, Ethan decided that while he was having us address the problem, he’d also take the opportunity to add a bit more boost and go for a bit more power.
After assessing the existing calibration, we discovered that there were significant drivability and power improvements to be made without any mechanical changes. However, to make the target power with less ignition timing, we installed a 3.125″ pulley from Whipple to deliver a safe ~10psi to the 6.4L HEMI. With the quick mechanical work wrapped in the shop, Charlie strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners.
The results? She printed a best run of 664.83awhp & 624.77lbft — a bit too much at all four wheels for our comfort on stock 392 pistons. As a result, Vlad set the final out-the-door numbers to a safer 633.66awhp & 591.88lbft on 93 octane! Solid outcome for this boosted Cherokee.
Check out the dyno video below.
Check out a few of our other Jeep / Dodge builds below:
Brian brought us his 2018 Jeep Grand Cherokee Trackhawk to have the wick turned up! Starting out in the shop, Louis set the supercharged 6.2L Hemi up with a Metco 2.75″ upper pulley, Metco billet idler, and a set of Injector Dynamics ID1050X fuel injectors, all breathing through the existing air-intake system.
With the mechanical work wrapped in the shop, Charlie strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. The result? 766.17awhp & 722.74lbft on 93 octane! These Trackhawks with just a few bolt-on modifications remain our nomination for the ultimate daily driver.
Check out a few of our other Jeep / Dodge builds below:
Alan brought us his Jazz Blue Pearlcoat 2016 Dodge Challenger SRT Hellcat to have her taken up a notch!
Working with the existing Legmaker Intakes, LLC air-intake system, Alex installed a Metco 2.75″ upper pulley to get the 2.4L supercharger spinning a bit higher, along with a Gates green belt & Metco billet idler to keep belt slip in check, a Mishimoto Automotive 160° thermostat to lower the engine’s operating temperature, and addressed fuel supply with a set of Injector Dynamics ID1050X fuel injectors.
With the mechanical work wrapped in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. The result? 803.45whp & 713.79lbft on 93 octane! Strong outcome for this ‘Cat!
James brought us his brand new Indigo Blue 2019 Dodge Charger SRT Hellcat to get it dragstrip ready! The target: 800whp+ on 93 octane, 9.00″ rear end & suspension to handle hard launches, and a drag pack to put it all down. Up first, to address the power goal, Alex set the supercharged 6.2L HEMI up with an intake system from JLT Performance, 2.75″ upper supercharger pulley & billet idler from Metco Motorsports, a set of 2.00″ primary diameter long-tube headers from Stainless Works, and a 180° thermostat from Mishimoto Automotive.
With the power modifications addressed, Alex moved on to installing a set of upper & lower control arms from BMR Suspension, and then topped it all off with the 3.25 geared Ford 9.00″ rear-end conversion from Driveshaft Shop including a Strange Engineering aluminum third member, Wavetrac Differentials limited-slip differential, 35-spline 1,400hp axles, and 4.00″ aluminum driveshaft. Then set aside for James to install for trips to the strip is a complete drag pack from Carlyle Racing featuring WELD Racing S79 wheels (20×6 front & beadlocked 17×10 rears) with Mickey Thompson Performance Tires & Wheels Street S/S radials.
With the mechanical work wrapped in the shop, Matt strapped the Hellcat down for Vlad to perform a custom calibration via HP Tuners, resulting in a strong 805.37whp & 729.80lbft even with 96° ambient air temperature! Considering these cars normally baseline at 670whp & 620lbft in factory form, that’s an increase of over 130whp & 100lbft! Up next, after James has had a chance to learn the car on the new setup, he’s bringing her back in for an E85 calibration, and another 50whp+ to head back to the strip with. Overall, killer outcome for this Hellcat!
Ryan brought us his 2016 Dodge Charger SRT 392 to get it breathing a lot better and thumping a lot harder! Up first, we installed a custom VVT camshaft from Cam Motion, supporting valvetrain components from COMP Cams & Manley Performance Products, Inc., along with OEM Mopar components to delete MDS, and all the miscellaneous OEM odds-and-ends to complete the installation, all topped off with a set of long-tube headers from Stainless Works.
Once the mechanical work wrapped in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. The results? 501.11whp & 510.16lbft! Up nearly 100whp & 110lbft from what these cars normally put down in stock form on our dynos! Solid outcome for this 6.4L Hemi.
