I didn't get at all until I started getting faster and adding aero and other mods. It is not an issue with the rear diff unless your lashing needs adjustment. I got mine with a Wavetrac and Nismo 3.69 gears. The issue is common to street cars that turned into track cars. Street cars are designed to function under track conditions. I have done a lot of research and talking with other Z track day goers and many just remove the system altogether or do a proportional setup as started above.
Most recently it seems that several Z track goers are doing a BMW MK60 ABS system swap. It is not cheap but not hugely expensive compared to a big brake kit. About 3k or so will get you there by competent shop. If you want a full blown race setup you can spend 10 to 12k on a Motorsports ABS system upgrade. My setup will be a hybrid of the two as I am adding the Motorsports controller to my system for better adjustability and tuning. Dang thing has like ten settings that can changed on the fly. According to my installer by adding the Motorsports controller to the MK60 it will bring its functionality to 90% or better of the Motorsports system. The total cost will be around 5 or 6k to me.
Austin Hertel who sometimes frequents the forum just installed the MK60 system in his Z and is racing this weekend at Gingerman Raceway in Gridlife Touring Cup. Find and follow him on Instagram as he will be doing a full review next week. The guy is incredibly fast and knowledgeable about the Z. He does all his own wrenching and has been a great resource to me and others.
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