So it seems that a lot of people like to ask what years are best with evos. And, for the most part i agree there is way to much info here and on the internet in general for people to be posting "what year is best.'

while these threads continue to get posted, a lot of people still answer before they get closed.

my problem:

Everyone always answers, "get an 05 over 03-04" because of ACD.

Now i realize that this is a true statement but how come noone brings up AYC on the 05? Didnt AYC start on the 05's also. I know they are two different technologies. And if it started earlier than the 05's is there a difference in the AYC for the different years. (including 06)

Also, If the AYC really did start in 05 (or at the least its been improved) how much is that going to matter when buying any evo? my friend says dont worry about the AYC it doesnt matter but i believe that to be incorrect. i want the best technology my money can afford so this is why it brings up questions.

so please, can someone straighten this out for me? i know this isnt an everyday repost so dont give me **** about it, and dont answer if you dont know, i dont want any half *** info that your guessing on. (not to be rude by all means)


Thanks a lot in advance.

 

The only USDM Evo with AYC is the X. It wasn't fitted to VIII's or IX's in the U.S.

 

I beg to differ.. im almost positive my IX has AYC

 

I recall reading an article about this a while ago. I think usdm evos don't have yaw control because of emissions requirements.

 

Click the link and check out this book

http://books.google.com/books?id=8Zk...k91W1w#PPP1,M2

 

Thread cleaned. If you are not going to help or you are going to post misleading info, then don't post at all.

 

Thanks for the info, sorry if this was considered a "repost" I wont post anymore threads as I do not want to upset somebody who happens to already know the answer.

 

ok. here we go; this is all the correct info right here.

The only EVO that has AYC in the US is the Evo X.

AYC has nothing to do with emissions. the didt include AYC because of the cost. you see how much the X jumped in price. Mitsu wanted the US to buy the car cause it was a good price, saved us money, saved them money and they were just introducing the car to America. Now it has a good base of support they are including all the goodies because they know we will pay the extra cash for them.

Also go ahead and clear this up. 03 EVO do not have a LSD in the front. 04 EVO do not either, except for the RS.

Starting in 2005+ the US EVO had ACD added to it and front LSD.

ACD controls the power from the front and the back. AYC controls the power from side to side. These 2 things are not considered traction control. however they are a fourm of TC becuase it does limit power to certain wheels at certain times just like TC does on say a Ferrari or Mustang.

About adding AYC to a car that is not equiped. its is not possible. to many sensors, ECU, i think a diff T-case. and many other items.

i hope this clears everything up.

edit: your friends who told you AYC doest matter....there dumb. sorry. but AYC is like having god working in your car...here is an example. starting at 2min http://www.youtube.com/watch?v=ioNjb...est-sti-vs-evo and just so you know this is a EURO market car so it has AYC.

here is what the EVO X has:

In the 2008 Mitsubishi Lancer Evolution, Super All-Wheel Control (S-AWC) is not simply the name of a new all-wheel drive system. Rather, S-AWC regulates drive torque at each wheel by controlling a network of dynamic handling technologies, including: Active Center Differential (ACD) 4-wheel drive, Active Yaw Control (AYC) rear differential, Active Stability Control (ASC), and Sports ABS brakes. Integration of ASC is new for all markets and also provides a significant advance in both dynamic capability and safety.

The ACD splits torque up to 50:50 between the front and rear wheels using an electronically controlled hydraulic multi-plate clutch. With input from the S-AWC computer, ACD regulates the differential limiting action to optimize the front/rear wheel torque split.

The S-AWC computer takes data input from steering wheel angle, throttle opening, wheel speeds, and the vehicle's longitudinal and lateral movements to determine the vehicle's path of travel. As the previous Lancer Evolution did, the 2008 model offers three driver-selectable traction modes: Tarmac, Gravel and Snow.

The innovative AYC rear differential uses a torque transfer mechanism to control rear wheel torque differential for different driving conditions, enhancing cornering performance by limiting the yaw moment acting on the vehicle. The AYC differential in the 2008 Lancer Evolution model adds yaw feedback control using a yaw rate sensor and also gains braking force control via ASC. Both models use a helical gear-type limited-slip front differential.

Here is an Article by mitsubishi on how it works: http://www.mitsubishi-cars.co.uk/features/ayc.asp

HOPE THIS HELPS!!

 

ayc was only offered in the X and your friend i belive is talking about ACD

 

nah he's not. he doesnt think AYC is needed in most everyday applications. he knows the difference lol. he thinks AYC is only necessary for like offroad application or like 80mph drifts lmao. im not saying he is expert we were just talking about it. but yes, we both believe in ACD.

 

I believe in not letting computers make decisions for me, pre 05' Evos FTW.

 

Im not sure about the later model Evo's but on my IV there is a steering angle sensor located behind the steering wheel there is also a lateral g sensor under the center console, the AYC pump is located under the R/R of the car behind the bumper it does have its own computer and works in conjunction with the ABS. It uses the ABS exciter rings and wheel speed sensors to see which wheels are moving faster/slower than the others. Its the whole moving power from the wheels that are slipping to the wheels that are gripping bit.

I think there was a guy or two on here that tried to install the AYC system on his VIII im not sure of the outcome. If you were able to source the parts, had the money and had enough patientce it could be done with out doubt, but for a everyday street car it wouldn't be worth it IMO.

 

does the IX MR come with front LSD and rear LSD?

 

yes

 

I don't think the price was the issue for not including the AYC on the US EVO IX, or the US 8 MR.

Primary due to the fact that the EVOX pretty much costs the same as the EVOIX's when they came out and the X's has AYC.

If the cost of the AYC was really an issue, they would not have included it in the US EVOX also (I'm pretty sure the cost of making the the EVOX has gone up for mitsu compared to the older evos)