Notices
Evo Engine / Turbo / Drivetrain Everything from engine management to the best clutch and flywheel.

acd question

Thread Tools
 
Search this Thread
 
Old Feb 1, 2005 | 02:39 PM
  #1  
sccaevot2's Avatar
Thread Starter
Newbie
 
Joined: Jan 2005
Posts: 17
Likes: 0
acd question

i have a evo mr... was wondering how the 3 acd settings distibrubute the power
50/50
65/35
etc
thanks
Reply
Old Feb 1, 2005 | 02:47 PM
  #2  
abcdef's Avatar
Newbie
 
Joined: Dec 2004
Posts: 78
Likes: 0
From: LA County
Just as a confirmation, once the vehicle's in one of these 3 settings does it vary the power between the front and the rear based on road conditions? Or is it a fixed value sort of thing?
Reply
Old Feb 1, 2005 | 02:50 PM
  #3  
honki24's Avatar
Evolved Member
20 Year Member
iTrader: (23)
 
Joined: Apr 2003
Posts: 1,580
Likes: 0
From: Houston, TX
... and is there any way (reasonably) to transplant into the 03 evo>?
Reply
Old Feb 3, 2005 | 02:52 PM
  #4  
sccaevot2's Avatar
Thread Starter
Newbie
 
Joined: Jan 2005
Posts: 17
Likes: 0
come on guys i thought i would have an answer by now.... i read somewhere that the evo was 65/35
and then 50 / 50
i was wondering if anyone knew how the 3 different settings ditributed the power...
Reply
Old Feb 3, 2005 | 03:04 PM
  #5  
chronohunter's Avatar
EvoM Guru
iTrader: (1)
 
Joined: Dec 2002
Posts: 1,767
Likes: 0
From: Boulder, Co.
Originally Posted by sccaevot2
come on guys i thought i would have an answer by now.... i read somewhere that the evo was 65/35
and then 50 / 50
i was wondering if anyone knew how the 3 different settings ditributed the power...
AFAIK it changes the percentage of locking in the center diff not necessarily the torque split. Torque split is "fixed" at 50/50 unless there is slippage on either end. The settings change the logic program for how much and when the center diff is locked during acceleration and deceleration and maybe cornering (not sure, hopefully someone can chime in). This helps the car get through a corner with hopefully less understeer. AYC (which we of course don't have) changes rear diff locking for a lateral (or side to side) version of ACD.
Reply
Old Feb 3, 2005 | 03:11 PM
  #6  
dohcvtec's Avatar
Evolved Member
iTrader: (5)
 
Joined: Oct 2004
Posts: 503
Likes: 0
From: SF Bay Area
^^^ that is correct. we also have steering position sensors and G sensors to help aid the ACD's decisions on locking/unlocking the center diff.
Reply
Old Feb 3, 2005 | 03:19 PM
  #7  
wingnut17's Avatar
Evolved Member
iTrader: (4)
 
Joined: Jul 2002
Posts: 602
Likes: 0
From: Beaver Falls, PA
ACD = Active Center Differential

ATS = Active Torque Split

haha, jk

Last edited by wingnut17; Feb 3, 2005 at 05:34 PM.
Reply
Old Feb 3, 2005 | 03:28 PM
  #8  
Terry S's Avatar
Evolved Member
iTrader: (2)
 
Joined: Mar 2004
Posts: 717
Likes: 0
From: Tustin, CA
Didn't someone post on here the link to the Mitsu tech article about this?

As I recall the car starts at a 100/0 split and as the car see's fit, it transfers it from 100/0 to 50/50 and everything inbetween. The 50/50 only occurs when the ACD locks the center diff up. This is on the tarmac setting. On the other two, it never reaches the full 50/50.

Or wait, was it a mag article...
Reply
Old Feb 3, 2005 | 03:37 PM
  #9  
chronohunter's Avatar
EvoM Guru
iTrader: (1)
 
Joined: Dec 2002
Posts: 1,767
Likes: 0
From: Boulder, Co.
Originally Posted by wingnut17

ATS = Active Torque Split
Could you elaborate?
Reply
Old Feb 3, 2005 | 03:44 PM
  #10  
chronohunter's Avatar
EvoM Guru
iTrader: (1)
 
Joined: Dec 2002
Posts: 1,767
Likes: 0
From: Boulder, Co.
Originally Posted by Terry S
Didn't someone post on here the link to the Mitsu tech article about this?

As I recall the car starts at a 100/0 split and as the car see's fit, it transfers it from 100/0 to 50/50 and everything inbetween. The 50/50 only occurs when the ACD locks the center diff up. This is on the tarmac setting. On the other two, it never reaches the full 50/50.

Or wait, was it a mag article...
notice how every magazine has their own definitive version of exactly how the system works? Yet they are all different! I think it depends on whether there contact was a marketing person or an engineer then you are subject to their interpretation of what the think they hear. No wonder it’s hard for us to figure out exactly what it does…
Reply
Old Feb 3, 2005 | 03:48 PM
  #11  
Terry S's Avatar
Evolved Member
iTrader: (2)
 
Joined: Mar 2004
Posts: 717
Likes: 0
From: Tustin, CA
Originally Posted by chronohunter
notice how every magazine has their own definitive version of exactly how the system works? Yet they are all different! I think it depends on whether there contact was a marketing person or an engineer then you are subject to their interpretation of what the think they hear. No wonder it’s hard for us to figure out exactly what it does…
I totally agree.

Well, maybe somewhere on lancerregistry they have a explanation about it?

How bout we all agree that tiny gerbil gnomes live in your center dif. They are hooked up to tiny electrodes that the ECU shocks them with. Each tiny gerbil gnome (tm) is hooked up to a plate and when they get shocked, they begin to run in place until the friction locks the plates up. Oh and they live by eating your clutch plates and synchros.

Terry S

Edit: and the 50/50 or 65/35 stands for how many tiny gerbil gnomes (tm) are facing a specific way. (i.e. 50/50 mean 50 facing one way, 50 facing the other...)

Last edited by Terry S; Feb 3, 2005 at 03:50 PM.
Reply
Old Feb 3, 2005 | 03:53 PM
  #12  
chronohunter's Avatar
EvoM Guru
iTrader: (1)
 
Joined: Dec 2002
Posts: 1,767
Likes: 0
From: Boulder, Co.
Originally Posted by Terry S
I totally agree.

Well, maybe somewhere on lancerregistry they have a explanation about it?

How bout we all agree that tiny gerbil gnomes live in your center dif. They are hooked up to tiny electrodes that the ECU shocks them with. Each tiny gerbil gnome (tm) is hooked up to a plate and when they get shocked, they begin to run in place until the friction locks the plates up. Oh and they live by eating your clutch plates and synchros.

Terry S
hey... I'm not gonna' fall for the old "gerbil crawled up my tail-pipe story"

...again!
Reply
Old Feb 3, 2005 | 03:54 PM
  #13  
Terry S's Avatar
Evolved Member
iTrader: (2)
 
Joined: Mar 2004
Posts: 717
Likes: 0
From: Tustin, CA
Reply
Old Feb 3, 2005 | 04:10 PM
  #14  
dohcvtec's Avatar
Evolved Member
iTrader: (5)
 
Joined: Oct 2004
Posts: 503
Likes: 0
From: SF Bay Area
Originally Posted by Terry S
I totally agree.

Well, maybe somewhere on lancerregistry they have a explanation about it?

How bout we all agree that tiny gerbil gnomes live in your center dif. They are hooked up to tiny electrodes that the ECU shocks them with. Each tiny gerbil gnome (tm) is hooked up to a plate and when they get shocked, they begin to run in place until the friction locks the plates up. Oh and they live by eating your clutch plates and synchros.

Terry S

Edit: and the 50/50 or 65/35 stands for how many tiny gerbil gnomes (tm) are facing a specific way. (i.e. 50/50 mean 50 facing one way, 50 facing the other...)
haha, great explaination!
Reply
Old Feb 3, 2005 | 04:23 PM
  #15  
wingnut17's Avatar
Evolved Member
iTrader: (4)
 
Joined: Jul 2002
Posts: 602
Likes: 0
From: Beaver Falls, PA
[
Originally Posted by chronohunter
Originally Posted by wingnut17
ACD = Active Center Differential

ATS = Active Torque Split
Could you elaborate?


Elaborate. Sure, It was a joke because SCCAEVOT2 thought the Torque Split changed. I was just making a joke (I guess it was a bad joke, sorry).
Reply



All times are GMT -7. The time now is 11:33 AM.