Jeep Cherokee Trackhawk
Aug 30, 2017, 07:20 AM
#1
Evolved Member
Thread Starter
Jeep Cherokee Trackhawk
I'm not a big fan of SUVs. I do support the notion of stuffing your most powerful engine in anything that'll work. I think they sell lots of them.
http://www.roadandtrack.com/new-cars...-drive-review/
http://www.roadandtrack.com/new-cars...-drive-review/
Aug 30, 2017, 07:37 AM
#2
EvoM Community Team Leader
I want one of these. Im really hoping there aren't any surprise deal breakers.
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Aug 31, 2017, 08:28 AM
#10
EvoM Community Team Leader
has anyone seen any published 1/4 mile times yet?
Aug 31, 2017, 11:24 AM
#11
taken from the jalopnik link in post 5
that is impressive! I wonder what coolant and oil temps are at the end of those sessions
Those are just the hardware changes. Add to that all the validation testing—which FCA engineers told me included a 24-hour on-track durability cycle and a punishing high RPM/high load track test wherein the Jeep had to undergo five 20-minute hot laps around a racetrack at temperatures greater than 100 Fahrenheit
Aug 31, 2017, 01:12 PM
#13
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Thread Starter
Oct 23, 2017, 01:56 PM
#15
Evolved Member
Thread Starter
instrumented test! All 4 wheels slip at launch?
"...Caught up in a sledgehammer fight against the V-8, engineers applied the same blunt-force mentality to the rest of the powertrain: There’s a beefier transmission and a stouter transfer case, plus a reinforced rear driveshaft, half-shafts, CV joints, and differential. The front axle is the same as the regular SRT Jeep’s. That transmission is still a ZF eight-speed, now christened 8HP95 and officially rated to handle up to 811 pound-feet of torque. The transfer case routes torque forward with a wider chain than in the naturally aspirated SRT, with forged-steel sprockets instead of powdered-metal ones. Tube-wall thickness is up on the rear driveshaft, and the differential housing gains a mount, going from three to four. Inside, the diff itself goes from two spider gears to four, with a modified tooth geometry for greater strength. The Hellcat engine alone outweighs its naturally aspirated brother by 108 pounds, and everything aft of it adds another 105, according to Jeep. But that’s for identically equipped vehicles. At 5258 pounds, this Trackhawk actually weighs less than the last Grand Cherokee SRT we tested (at 5291 pounds), which was equipped with a panoramic sunroof.
Like the Challenger Demon, the Trackhawk gets the so-called Torque Reserve function to aid launching. With launch control engaged and the Jeep brake-torqued, this system cuts fuel to individual cylinders, allowing the engine to rev higher and the supercharger to build more boost—6.4 psi as it sits at the line. Lift your foot off the brake and the Trackhawk will squawk all four 295/45ZR-20 Pirellis on its way to a 3.5-second zero-to-60-mph time. We couldn’t match Jeep’s 11.6-second-at-116-mph claim for the quarter-mile; our best run took 12.0 seconds at 115 mph."
https://www.caranddriver.com/reviews...ll-test-review
"...Caught up in a sledgehammer fight against the V-8, engineers applied the same blunt-force mentality to the rest of the powertrain: There’s a beefier transmission and a stouter transfer case, plus a reinforced rear driveshaft, half-shafts, CV joints, and differential. The front axle is the same as the regular SRT Jeep’s. That transmission is still a ZF eight-speed, now christened 8HP95 and officially rated to handle up to 811 pound-feet of torque. The transfer case routes torque forward with a wider chain than in the naturally aspirated SRT, with forged-steel sprockets instead of powdered-metal ones. Tube-wall thickness is up on the rear driveshaft, and the differential housing gains a mount, going from three to four. Inside, the diff itself goes from two spider gears to four, with a modified tooth geometry for greater strength. The Hellcat engine alone outweighs its naturally aspirated brother by 108 pounds, and everything aft of it adds another 105, according to Jeep. But that’s for identically equipped vehicles. At 5258 pounds, this Trackhawk actually weighs less than the last Grand Cherokee SRT we tested (at 5291 pounds), which was equipped with a panoramic sunroof.
Like the Challenger Demon, the Trackhawk gets the so-called Torque Reserve function to aid launching. With launch control engaged and the Jeep brake-torqued, this system cuts fuel to individual cylinders, allowing the engine to rev higher and the supercharger to build more boost—6.4 psi as it sits at the line. Lift your foot off the brake and the Trackhawk will squawk all four 295/45ZR-20 Pirellis on its way to a 3.5-second zero-to-60-mph time. We couldn’t match Jeep’s 11.6-second-at-116-mph claim for the quarter-mile; our best run took 12.0 seconds at 115 mph."
https://www.caranddriver.com/reviews...ll-test-review
Last edited by moparfan; Oct 23, 2017 at 02:06 PM.