Nissan 370Z Forum - View Single Post - Danger of helical diff on RWD cars: Quaife, Wavetrac

Zilver · 05-05-2021, 12:56 AM

Looking at replacing my vlsd with an aftermarket diff and I usually run on mountain roads with tight turns.Deciding between quaife and wavetrac which are both torque sensing / helical diffs. Didnt want to go clutch type diff as i hear they induce understeer at tight corners more than torsen unless you force them to break traction for the purpose of drifting

As might know torsen diff has cornering speed advantage compared to open diff becos it sends torque to the outside wheel when cornering as opposed to open diff where torque is not being sent to either wheel

My question is whether torsen diff could cause snap oversteer if not being more careful with throttle? As seen for example cars with torsen diffs like s2ks, mustang and those newer cars with E diffs which act bit like torque sensing have nose dive accidents during cornering. With Wavetrac the risk is even larger because torque doesnt get cut at decel which imo sounds really dangerous to me especially when weight transitions to front during braking.

As far as i understand clutch types send torque to both wheels during cornering which is less dangerous becos it wont nose dive as the inside wheel has torque to push the car out during cornering?

https://youtu.be/wMZJ1E6BI0c

Here is a video of a crash with a supra vs ae86 which some of you migjt have seen (driver over corrected but beside the point). An example of a nose dive during corner exit that i am most afraid, seems to be a helical diff as only left outside wheel is pushing the car to the inner wall on the right? Would a clutch lsd induce such effect despite ppl say they give confidence at corner exits?

Can anyone who had installed torsen diff and been on autocross or track days give advice ? And for those who have clutch type is understeer very noticable at tight corners?

05-05-2021, 12:56 AM	#1 (permalink)
Zilver Base Member Join Date: Dec 2016 Location: Aus Posts: 18 Drives: 09 MT Sport Rep Power: 8	Danger of helical diff on RWD cars Looking at replacing my vlsd with an aftermarket diff and I usually run on mountain roads with tight turns.Deciding between quaife and wavetrac which are both torque sensing / helical diffs. Didnt want to go clutch type diff as i hear they induce understeer at tight corners more than torsen unless you force them to break traction for the purpose of drifting As might know torsen diff has cornering speed advantage compared to open diff becos it sends torque to the outside wheel when cornering as opposed to open diff where torque is not being sent to either wheel My question is whether torsen diff could cause snap oversteer if not being more careful with throttle? As seen for example cars with torsen diffs like s2ks, mustang and those newer cars with E diffs which act bit like torque sensing have nose dive accidents during cornering. With Wavetrac the risk is even larger because torque doesnt get cut at decel which imo sounds really dangerous to me especially when weight transitions to front during braking. As far as i understand clutch types send torque to both wheels during cornering which is less dangerous becos it wont nose dive as the inside wheel has torque to push the car out during cornering? https://youtu.be/wMZJ1E6BI0c Here is a video of a crash with a supra vs ae86 which some of you migjt have seen (driver over corrected but beside the point). An example of a nose dive during corner exit that i am most afraid, seems to be a helical diff as only left outside wheel is pushing the car to the inner wall on the right? Would a clutch lsd induce such effect despite ppl say they give confidence at corner exits? Can anyone who had installed torsen diff and been on autocross or track days give advice ? And for those who have clutch type is understeer very noticable at tight corners? Last edited by Zilver; 05-03-2022 at 03:33 AM.