The videos might not be the best depiction of my driving style. Yes I was compensating for the oversteer by getting on the gas a little sooner to weight the rear, which did help. I chose those 2 shots because the oversteer was most evident. I wonder if the nismo diff has any affect on this. It’s so strong even set at low. I wish I could go for a ride in someone elses to compare. I don’t have full confidence in my install because the diff guy that was supposed to build it left town and the shop decided to build it themselves without checking with me first. I’m assuming there’s no way to really botch the install though. I know they didn’t measure backlash but that wouldn’t cause handling issues.

Does anyone think that some aftermarket rear camber and toe arms with upgraded bushings might reduce flex in the rear?

 

Dave if you don't mind me asking, why have you not lowered the car and upgraded shocks? In doing so you will need rear camber and toe arms. Either way it does not hurt to install these and would allow for more camber in the rear.

 

I was going to ask if it could have been the diff. I personally find the stock viscous unit a little non linear until it's had a few turns to warm up.

You mentioned a Nismo/clutch unit, have you tried it in a stronger setting?

Listening to the video, the throttle is applied before the rear begins to squack & loose traction. I'm assuming it's feeling light before adhesion limit is reached? Because classic techniques would dictate that what happened in the video is logical.

 

You have the Nismo diff!? Something is way wrong. Curioser and curioser...

 

still waiting for the "right" kit to be released..
I can't understand why no one is interested in releasing an affordable track coilover solution.
I spoke with Ground control who has no interest in developing anything for the Z (including advanced design shocks). Even Tein has no plans to release an RS kit.
Hopefully the truechoice kit will be released soon.

 

hey dave,
i too noticed that you were accelerating steadily through the turn (which would be standard practice), but perhaps you need to go in with more corner speed to introduce some understeer, and get on the gas after the apex. also, you may want to put the front sway bar to full stiff.

Chad

 

Mid-April.

 

Daveh,
Try working on the rear swaybar, if the Med setting still doesnt help then go to the softest setting on the rear and try the hardest setting on the front.

 

I see said the blid man..

 

So, did the 0.08 toe-in for the rear work out?

 

I think it helped. My last track day was was in the rain so it was hard to tell. Perhaps the car feels a bit more stable on the street after the adjustment but the street tires don't put the same amt of stress on the car as the toyos.
The rain however was actually a good thing because I think I came to the conclusion that my nismo diff may be part of the problem because it is too strong. Even at the low setting I feel like I am fighting to keep the car in line. On the street when I take a somewhat tight corner the rear tires skip around and the car wobbles a bit as they fight to move at the same speed. It's also hard to keep the car in the lane on a tight twisty road because of the push pull effect of the unit. The probably causes more heat build up in the rear tires on the track until they loose traction before the fronts. Driving style will have a huge effect on this but it's interesting to note that Sport compact car had the same complaints. I'm not ready to dissassemble it yet and rearrange clutch plates until I get the car set up with a decent set of coilovers (unitech said they are going through final testing next week). I'll be at Laguna in a couple of weeks for another go at it.

 

I had the same problem for a while on my car - the rear tires would get hot after 3-4 laps and it would start to oversteer everywhere. Two things fixed it: 1. Bigger rear tires. 2. Driving differently. Entering the corners a little faster and bringing the car out father (in the corners where I could do it) helped a lot, and was faster. In the 2nd corner in the vid you are a good 10 feet from the outside curbing. Now I don't know what track that is or what the right line is for that corner, but pinching the car off is really what caused the problem for me.. then lack of rear traction.

With 275s all the way around my car oversteers quite a bit as well.