MrAWD

I was wondering if anyone have a pricing on the brand new AYC unit (the whole thing) from the EVO 7? Use part price would help also!

Thanks


Mr. AWD

Lan Evo

I hope you're not planning to install that onto your car.

You will have to get the whole system including the rear diff portion (w/ LSD), hydralic pump, lines, wires and the AYC ECUs...

MrAWD

Yup, currently collecting the data...but it all depends on the new EVO...and its specs!

That is definitely one of the ways to go. But, that is not what I am planning on doing.

BTW, what did you mean by the "whole system including the rear diff portion"? Are you trying to say that hydraulic part and diff part are two separate units? I was under the impression that there is only one unit in there and everything is inside. That is why I specified the whole unit originally...

Mr. AWD

Lan Evo

mmm....as far as I can tell, the hydralic pumps are not located within the "main" portion of the AYC (rear diff). In addtion, you will need to install sensors onto your steering wheels, connecting to the AYC ECU.

For a performance car, I see a good mech LSD is the way to go (Cusco LSD), just my opinion

MrAWD

So, is that pump somewhere in the engine compartment driven by a belt of something? In that case, that would be another power draining parasite that would affect engine performances a bit.

So far, I didn't hear about this, but if there is a pump, it would have to be driven somehow and the best place would be somewhere close to the engine.

Anyone knows more about this?

Well, as of now, nobody that I know makes one for my car. So I would have to be a genie pig for someone willing to build one.

On the other hand, this whole idea sounds pretty interesting and it will bring me back with the stuff that I liked doing a while back - control systems. Either way I go, I should be able to learn a lot and have fun doing it. If it works at the end, that would be even better!

As of regular LSD being enough for the rear, I don't think that is completely true, and at the time I believe that you need to have something active in there to make a best use of the AWD system that is in there already.

Mr. AWD

Braf

Actually if you look around you will probably find all the necessary parts. A few people have removed the AYC bits in favor of LSD. Try Claudius, I think he changed his.

MrAWD

You are right about the Claudius, but he has an EVO 6 TME and I am looking for the one from EVO 7.

Thanks tough...


Mr. AWD

Braf

Wheel speed sensors, steering position sensor, two g-sensors, AYC ECU, electrically driven hydraulic pump, hydraulic lines, hydraulic reservoir… Did I miss anything? I doubt the changes between the Evo 6 and 7 are noteworthy.

The AYC pump and reservoir is located to the RH side of the trunk. The whole mechanism uses three kinds of fluid. Gear oil for the open diff., Dextron II for the hydraulics and SP III for the AYC clutches. AYC fluid is apparently no longer available so SP III has been substituted.

Figures quoted by someone who has done the swap suggests that you are adding about forty pounds to your vehicle. With your apparent knowledge of control systems it would be interesting to see if you can make it all work in a worthwhile way.

For motor sports use I would suggest a very short service interval for the AYC fluid.

PToast

Lan Evo is right, the AYC pump is actually a separate electric unit found in the rear of the car. Check out this page, which was posted by erikgj on another thread:

http://www.lancerregister.com/faq/G04/g04.html

There is also a simple ECU schematic, so you can examine exactly what inputs the ECU expects to operate the AYC. Hope that helps

MrAWD

All of those parts you mentioned already are on my car and they would be reused (exception is the steering angle sensor and hydraulics). And you did miss a throttle positioning sensor

Well, people are saying that EVO 7 is much better regarding the active stuff compared to the EVO 6. Do you think that the main reason for that is addition of the ACD or AYC is improved as well?

That makes perfect sense! Diff it self is separated into three chambers and they are populated with different fluids, since they are doing different things (standard diff on the driver side, gears in the middle and clutches on the passenger side).

40 lbs is a lot of weight. The good thing about that is that you are adding weight in the rear. That passenger corner is the lightest one on the car anyway (DSM I mean), so that shouldn't affect the weight balance too much!

Great info Braf! Thanks


Mr. AWD

TearItUpSports

iTrader: (2)

Are you talking about all this for your Talon? If so there is just about no way your going to make it work and have it increase performance. You are much better off getting a suspension upgrade and maybe going with the LSD's.
Here is one offered by Road Race Engineering:

http://www.roadraceengineering.com/ecldrivetrain.htm

See bottom of the page.


if this is for your DSM, you are trying to take a system and slap it on, and it will likely underperform, especially since your cars weight distribution and handling characteristics are probably nothing like the EVO.

MrAWD

Yes, this will be for my Talon. Also, I wouldn't say that there is no way for something that does exist. And, rear end in my car already has an LSD in there. I would like to have an upgrade for it, but I can't find one. Quaife would be a nice thing, but they have those fro the center and the front only.

No, system will not be just slapped on, since there would be too many things to adjust to unknown specs. Parts that would be swapped on are hydraulic system (except the control of it) and rear differential. If axles would fit, that I would gladly reuse them, but chances are that I would have to make a new set.

Since you mentioned weight distribution, do you actually know what is it on the stock EVO 7?

As of the EVO not matching characteristics of my car, you are right. Stock EVOs are much slower and they don't handle even close to my car!

Thanks for the info!

Mr. AWD

MrAWD

So, what about those rumors of having to have a lot of servicing on 5s and 6s and not that many on 7s?

How much is yours then (with everything I assume)? And, do you have any idea how much would that be from the dealer?

Right now, my car is at 60/40 F/R, so that extra weight should bring things a bit better corner weights wise. That rear wheel where the hydraulics go is around 580 lb while the other side is in mid 600s. Also, drivers front is the heavies corner, so extra weight on the opposite side will help too!

As you said, extra weight is an extra weight. Once everything is in there, we will see whether this is going to be improvement or not!

Later


Mr. AWD

erikgj

iTrader: (2)

The AYC/ACD computer also comunicates with the sports ABS system. The ABS also senses all four individual wheel speeds and supplys that info to the ACD ECU.

You would also have to make sure all the sensors on your car are compatible with the ACD ECU.

It would be a big project.

Erik