Project S13 - Part 3: The Good Stuff

The simplest way to determine your final drive gear ratio is to count the teeth or check the ring gear; 49 divided by 12 equals 4.083 for a R200V S13/S14 SR20DET manual. S13/S14 SR20DET automatics came with 3.916.

The simplest way to determine your final drive gear ratio is to count the teeth or check t

We set our GT LSD Pro to the low setting in order to soften the rear breakaway characteristics for time attack use, which is highly recommended for all the non-drifters out there, on account of the S13 chassis' notorious abundance of rear antisquat geometry. SR Motorcars handled the Nismo unit install as well and it went without much trouble, although it was too much fun to be enamored with testing the external adjustment of the limited-slip differential. Chatter, clanking, and noise-free, the GT LSD Pro has proven to be quite the usable street limited-slip differential as well.

We filled the pumpkin with the included 80W-90 synthetic Nismo Versuspeed limited-slip differential oil and then broke in the differential by driving two hours to Buttonwillow Raceway and doing laps. Nismo suggests a break-in of 186 miles at no more than 37 mph. We've done, uh, more than that, and at an angry pace that's a bit faster as well. After another 550 miles on the car, we've only experienced the slightest of clunking when the car is cold and warming up. But once up to temperature, there is nothing from the limited-slip differential except glorious throttle steering. Faster and more fun? Works for us.