Lock up and ice mode

Evildky · 08-06-2021, 01:16 PM

Quote:

Originally Posted by Hotrodz

I don't think anyone is suggesting you cheat but just providing information for all that have similar issues. I don't AX so I have little knowledge of the rules.

I think you should work with someone that knows how to set up the gears and lash if you are having issues with your diff not performing well. Also, what diff fluid and weight are you using, it can make a difference.

Sent from my SM-G965U using Tapatalk

I'm just trying to be explicit as to why and aftermarket option is not a viable solution. To complicate things I also do Time Trials and conflicting rule sets mean I have to give up a one thing to stay legal for the other. True Coil over rears are legal for Time Trials Touring class, but relocating the spring is not legal for Street Touring autocross, not that moving the spring provides any advantage just changes the rate you need to run to have the same wheel rate. I can run 11" wheels and 315 tires for solo but only 10.5 wheel with 285 tire for Time Trials.

There is nothing wrong with my lash in my diff, it's that the engagement is too agressive and when engaged it's full on locked. I'm running the motul esther 140w90. It's as if the ramps are too steep allowing for immediate engagement under the lightest load. I've got the preload set to it's lowest but when activated it's full lockup. It's as if it's for too many plates. I have not opened the carrier to count the plates. I miss the simple clutch type used in the Z31's.

Rusty · 08-06-2021, 02:51 PM

Think you can get different springs for the Nismo Pro diff to change the lock up on them. I've never seen them tho. Think you can change the clutch plates around inside of it too.

SonicVQ · 08-06-2021, 12:06 PM

Has anyone looked at the brake booster vacuum to see if it gets low?
(leaking booster line check valve / booster)

Edit:
To prevent thread confusion, I started a different thread investigating the possible role of the brake booster vacuum:
New thoughts on "Ice Mode" & possible solution?

08-06-2021, 02:51 PM	#2 (permalink)
Rusty A True Z Fanatic Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 70 Posts: 35,579 Drives: 2011 Nismo GM 6M Rep Power: 2684440	Think you can get different springs for the Nismo Pro diff to change the lock up on them. I've never seen them tho. Think you can change the clutch plates around inside of it too. Hotrodz likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

08-06-2021, 12:06 PM	#3 (permalink)
SonicVQ Base Member Join Date: Jan 2016 Location: Ontario Posts: 232 Drives: G37 Sport Rep Power: 6722	Has anyone looked at the brake booster vacuum to see if it gets low? (leaking booster line check valve / booster) Edit: To prevent thread confusion, I started a different thread investigating the possible role of the brake booster vacuum: New thoughts on "Ice Mode" & possible solution? Last edited by SonicVQ; 08-06-2021 at 04:11 PM.

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