Big tires love big power too. Here’s a sweet 2015 Jeep Wrangler Rubicon (JK) that was delivered to us brand new. Our job was to dyno it, install a RIPP Supercharger (Jeep JK) kit with stage 1 tune and dyno it again.
The Jeep Wrangler was to be supercharged, tuned, tested and delivered to the dealership for them to sell as an upgraded package.
The Jeep came to us with a bunch of customization goodies already installed. It had things like offroad LED lights, lift, big Nitto Trail Grappler tires, Black Rhino wheels, offroad bumpers, sliders, winch and a full body coat of white rhino liner. Pretty awesome to say the least. The choice of parts was very cohesive and well chosen.
The Jeep was put on the dyno by our tech Mike Petruzzo and base numbers were laid down. Care has to be taken when dyno’ing an automatic vehicle. Special techniques need to be applied when doing the run in order to keep the Jeep from shifting gears when you don’t want it to. Baseline numbers taken, it was time to begin the build.
HGMS tech Alain Alba had just finished an Evo VIII build and was ready for something a little… different. Installing the RIPP Jeep Supercharger kit is quite the involved process. This isn’t just the simple bolt on that goes on in 2 hours.
A couple of hours later the JK RIPP Supercharger kit was installed and the tune flashed. Time to close shop and get it on the dyno in the morning.
The post-supercharger run was done and proved the install was successful and very well worth the intensive work. This is a Jeep, not a supercar, but the added power and torque will come in very handy with those big tires. Not only that, but superchargers yield more power down low. This means the newfound power is very usable at low speeds, such as a Jeep will encounter in offroad conditions.
The results? Well, the results were very impressive. The Jeep Wrangler had a gain of 70.8 WHP (Wheel Horsepower) and roughly 30 LB-FT WTQ (Wheel Torque) at peak power near 6000 RPM. What’s more impressive is the gain in wheel torque at the bottom end, near 3500 RPM. The gain in torque there was around 50 LB-FT of wheel torque. That’s the power figure that will really make the biggest difference. It will make the Jeep a much stronger offroader. Additionally, that’s the power that will be felt around town. After all, when’s the last time you revved a Jeep past 6000 RPM? Exactly.
Check out the dynograph for the results.
Important note. Our DynoDynamics dynamometer is very precise, but it doesn’t read the same way other dynos do. Our dyno reads smaller numbers. For this reason, don’t go comparing our dynographs with others on the web as they simply won’t match. You need to look at the gains, because that’s the only apples to apples comparison.