Shooting for the fastest x351 XJ SC XJR , what a difference so far!

Reply Subscribe

Thread Tools

Search this Thread

Sep 1, 2021 | 01:44 PM

#21

AlexJag

Thread Starter

Sponsor

Joined: Apr 2016

Posts: 1,341

Likes: 453

From: San Diego CA

Quote:

Originally Posted by ChaosphereIX

and there is the main reason for the very good times - my tuned XJ (supposed to be ~640hp) struggles to put the power down off the line, even with the fancy diff and PS4s. Extra sticky tires certainly help!

Just for reference, my fastest 0-60 and 60 ft time on my 08 XKR was with PS4 tires not Mickey Thomson's, I hit 3.8 with 1 ft rollout, 4.05 without ( pretty similar times to my XJ with Mickey Thompson's tires) It's just on my XJ it's got older tires so I figured I would throw these on from an extra set of my XKR ... So no it's not just the tires 🙂 I can tell by 6 miles per hour higher trap speed in just 1/8 mile, And also being dead even with my friends 2016 M6 also is a good tell sign

__________________

2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 112.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 SC (Alpha Jag ECU, TCU tune, crank pulley), 600+ HP, 11.6 sec 1/4th mi 122mph, 7.6sec 1/8th mi
2018 Jaguar F-Type (AlphaJag ECU TCU, lower upper pulleys intake) 10.77 ,131mph ,700hp