Rear Diff Options - Power Oversteer Found Here
Has anyone had the rear come loose ala "snap oversteer" on them with mediumish throttle through a steady-state corner (such as a looping freeway onramp?) It has happened to me 3 times now.... the rear just turns to glass and slides right out and the car goes sideways (and not in a fun way).
Perhaps I need to loosen up my rebound/bump in the rear and lower my rear tire pressure (I use like 39 psi on the streets for the rear Nitto NT05's.) :\ It's just sort of unnerving, and I'm not entirely sure it's the diff's fault or if it's something else that needs to be adjusted. I am thinking it is the tires getting overworked, they probably don't like that high of a pressure which would explain why they just 'let go' so suddenly and violently.
I really need to take this thing to AutoX and test out the rear diff, haven't had a lot of time to really feel it out when driving spiritedly.
Perhaps I need to loosen up my rebound/bump in the rear and lower my rear tire pressure (I use like 39 psi on the streets for the rear Nitto NT05's.) :\ It's just sort of unnerving, and I'm not entirely sure it's the diff's fault or if it's something else that needs to be adjusted. I am thinking it is the tires getting overworked, they probably don't like that high of a pressure which would explain why they just 'let go' so suddenly and violently.
I really need to take this thing to AutoX and test out the rear diff, haven't had a lot of time to really feel it out when driving spiritedly.
Has anyone had the rear come loose ala "snap oversteer" on them with mediumish throttle through a steady-state corner (such as a looping freeway onramp?) It has happened to me 3 times now.... the rear just turns to glass and slides right out and the car goes sideways (and not in a fun way).
Perhaps I need to loosen up my rebound/bump in the rear and lower my rear tire pressure (I use like 39 psi on the streets for the rear Nitto NT05's.) :\ It's just sort of unnerving, and I'm not entirely sure it's the diff's fault or if it's something else that needs to be adjusted.
Perhaps I need to loosen up my rebound/bump in the rear and lower my rear tire pressure (I use like 39 psi on the streets for the rear Nitto NT05's.) :\ It's just sort of unnerving, and I'm not entirely sure it's the diff's fault or if it's something else that needs to be adjusted.
...how is that a 'problem'?
Wasn't there another company that did something similar to Wavetrac but used friction discs in stead of something that resembles a "Phantom Grip?" Seemed like I remember seeing a planatary gear setup that had friction discs on one end and the planateries would force the lock up due to the helical angle.
I could see this hybrid style being better then a clutch pack. I had a Kaaz in my GS-T and my friends Quaife setup handled better in the corners...until it really got light on the inside wheel...then both of us were heading off road. That clutch pack made the car understeer like crazy when you were at the limit of one tires grip.
I could see this hybrid style being better then a clutch pack. I had a Kaaz in my GS-T and my friends Quaife setup handled better in the corners...until it really got light on the inside wheel...then both of us were heading off road. That clutch pack made the car understeer like crazy when you were at the limit of one tires grip.
^ my only input to this is that i think a 1.5 in the front would increase understeer - simply because there is some lockup on decel, which you probably will be doing on turn in, and any lockup between the two wheels will have a small amount of resistance if the speeds between the wheels change - which happens in cornering. that's my simple understanding of it. same thing applies to adding preload to any diff. 1 way is typically the recommended setup for front lsd's, probably for that reason. (i could be wrong on all of this). the exchange of 1.5 way would be more straightline stability, i.e. during braking
also, i think for rally cars, they would prefer their cars to be setup to understeer - i wouldn't want to put a loose car on a loose surface, but that's just me. aren't most racecars (race car race cars, like f1, le mans, etc) setup to understeer pretty heavily? (no idea)
also, i think for rally cars, they would prefer their cars to be setup to understeer - i wouldn't want to put a loose car on a loose surface, but that's just me. aren't most racecars (race car race cars, like f1, le mans, etc) setup to understeer pretty heavily? (no idea)
Last edited by EVOlutionary; Jun 19, 2013 at 07:18 PM.
Has anyone had the rear come loose ala "snap oversteer" on them with mediumish throttle through a steady-state corner (such as a looping freeway onramp?) It has happened to me 3 times now.... the rear just turns to glass and slides right out and the car goes sideways (and not in a fun way).
Perhaps I need to loosen up my rebound/bump in the rear and lower my rear tire pressure (I use like 39 psi on the streets for the rear Nitto NT05's.) :\ It's just sort of unnerving, and I'm not entirely sure it's the diff's fault or if it's something else that needs to be adjusted. I am thinking it is the tires getting overworked, they probably don't like that high of a pressure which would explain why they just 'let go' so suddenly and violently.
I really need to take this thing to AutoX and test out the rear diff, haven't had a lot of time to really feel it out when driving spiritedly.
Perhaps I need to loosen up my rebound/bump in the rear and lower my rear tire pressure (I use like 39 psi on the streets for the rear Nitto NT05's.) :\ It's just sort of unnerving, and I'm not entirely sure it's the diff's fault or if it's something else that needs to be adjusted. I am thinking it is the tires getting overworked, they probably don't like that high of a pressure which would explain why they just 'let go' so suddenly and violently.
I really need to take this thing to AutoX and test out the rear diff, haven't had a lot of time to really feel it out when driving spiritedly.
Evolved Member
Joined: Jul 2003
Posts: 638
Likes: 7
Disagree with kyoo on that one. When my car was on stock set-up, my ACD reflash took out the unnerving high speed turn trailing throttle understeer almost completely. It is also the only set-up/suspension mod that was ever noticed within five minutes of driving by my wife in the passenger seat - and commented on in a positive way.
Both 12-plate - I have a TRE max-lock - and ACD flash are game changers as far as driving the Evo is concerned ... it drives very different and very much improved in so many respects that are really quite difficult to fathom without actually driving the car with them ...
My ACD flash does everything I could ever imagine the car could do - in contrast to the stock ACD program that just sucks - it is all a street driven car really needs. The TRE max-lock just widened my imagination - it puts put a huge grin on my face every time I drive it, as I can walk on the throttle so much earlier and can now balance the car on the throttle quite nicely ...
Both 12-plate - I have a TRE max-lock - and ACD flash are game changers as far as driving the Evo is concerned ... it drives very different and very much improved in so many respects that are really quite difficult to fathom without actually driving the car with them ...
My ACD flash does everything I could ever imagine the car could do - in contrast to the stock ACD program that just sucks - it is all a street driven car really needs. The TRE max-lock just widened my imagination - it puts put a huge grin on my face every time I drive it, as I can walk on the throttle so much earlier and can now balance the car on the throttle quite nicely ...
Disagree with kyoo on that one. When my car was on stock set-up, my ACD reflash took out the unnerving high speed turn trailing throttle understeer almost completely. It is also the only set-up/suspension mod that was ever noticed within five minutes of driving by my wife in the passenger seat - and commented on in a positive way.
Both 12-plate - I have a TRE max-lock - and ACD flash are game changers as far as driving the Evo is concerned ... it drives very different and very much improved in so many respects that are really quite difficult to fathom without actually driving the car with them ...
My ACD flash does everything I could ever imagine the car could do - in contrast to the stock ACD program that just sucks - it is all a street driven car really needs. The TRE max-lock just widened my imagination - it puts put a huge grin on my face every time I drive it, as I can walk on the throttle so much earlier and can now balance the car on the throttle quite nicely ...
Both 12-plate - I have a TRE max-lock - and ACD flash are game changers as far as driving the Evo is concerned ... it drives very different and very much improved in so many respects that are really quite difficult to fathom without actually driving the car with them ...
My ACD flash does everything I could ever imagine the car could do - in contrast to the stock ACD program that just sucks - it is all a street driven car really needs. The TRE max-lock just widened my imagination - it puts put a huge grin on my face every time I drive it, as I can walk on the throttle so much earlier and can now balance the car on the throttle quite nicely ...
https://www.evolutionm.net/forums/ev...t9as-read.html
Evolved Member
Joined: Jul 2003
Posts: 638
Likes: 7
Yes, I have an ACD tuning custom flash. I had the ACD ECU flashed by Matt for the 12-plate which was not in the car yet at the time. So I put the flash in before the diff, even though the ECU was specifically flashed for the upgraded diff and the difference was stunning.
The combination of an aggressive ACD flash with the 12-plate is a bit tight for 3-point turns in parking lots - I have it flashed on the tarmac mode -but going to the gravel or snow map for maneuvering takes care of that - even though the centre diff takes longer to disengage upon turning there is less clamping.
The combination of an aggressive ACD flash with the 12-plate is a bit tight for 3-point turns in parking lots - I have it flashed on the tarmac mode -but going to the gravel or snow map for maneuvering takes care of that - even though the centre diff takes longer to disengage upon turning there is less clamping.
Yes, I have an ACD tuning custom flash. I had the ACD ECU flashed by Matt for the 12-plate which was not in the car yet at the time. So I put the flash in before the diff, even though the ECU was specifically flashed for the upgraded diff and the difference was stunning.
The combination of an aggressive ACD flash with the 12-plate is a bit tight for 3-point turns in parking lots - I have it flashed on the tarmac mode -but going to the gravel or snow map for maneuvering takes care of that - even though the centre diff takes longer to disengage upon turning there is less clamping.
The combination of an aggressive ACD flash with the 12-plate is a bit tight for 3-point turns in parking lots - I have it flashed on the tarmac mode -but going to the gravel or snow map for maneuvering takes care of that - even though the centre diff takes longer to disengage upon turning there is less clamping.
which we actually discussed this lol https://www.evolutionm.net/forums/10791206-post256.html
