I have a theory that I would like to try on my car, but want to see if Im missing something. I know that the ACD on the newer evos locks the front and rear wheels together for short perids of time. Also the acd t case has the ability togrip 3 times as hard as the vcu t case. Well why cant I take the acd transfer case, connect it to a small 12 v hydraulic pump (such as the mr2 power steering pump), regulate that pump at 145 psi (full lock on the ACD t case) and connect the electronics portion of the pump to the pwr steering switch that is in our cars (not sure if it acts as a on/off switch yet, still doing research) so whenever a turn is made the pump would shut off and unlock. Thus allowing you to turn. This way it would act like a locked differential, which would give you the most amount of traction all the time, except on turns where it would be an open diff so you can turn. The only flaw I see if this works is wear and tear on the t case, as well as the pump used. This would work for 03-04 Evos, definatly not worth it for 05-06 models.

What are your thoughts?

 

Sorry, I don't know the answer to your quetion, but is this the same Porsche Killer that used to write the amazing stories? Talon Digest days? If so, HOLY CRAP. You need to start writing again.

 

sorry Im not him

 

go for it, let us know what happens

 

+1 and be sure to take pics of the carnage!

 

I think this guy is running low on blinker fluid

 

wow

 

There is a little bit of genius in craziness, it seems like a good idea but the fact that it is connected to the steering wheel sensor might lead to some unpredicatable handling scenarios. Because ACD uses a multitude of sensors e: brake sensor, steering angle sensor, TPS etc to determine the level of lock using complex algorithms. What happens when you are on the gas the steering is slightly off center ... It's worth a short and might work as a rudimentary ACD system ...

 

Thats a good point, my other idea was to use some sort of optical encoder for the steering if the pwr steering sensor wont work. Im not trying to really compete with the ACD system, in my opinion its an amazing system, Im just trying to come up with some sort of lsd for the center diff. No one makes anything for our cars like that. Im aware of the sensors that the ACD uses and Im sure that my idea cannot or will not compete with it, but it might work as an lsd for the center diff.

 

You must be an engineer.

 

Actually, in the past I have worked on fighter jets, and now Im currently a Navy special operative. However Im majoring in engineering, and my friend that is on board with this experiment is a mechanical engineer.

 

So your going to use this pump to turn on and off the acd depending on (active center differential) mid turn correct? but I have two MAJOR concerns about this

1. According to this it would completley disengage the acd when "active" thus taking power away from ALL WHEELS

2. If you do get a voltage regulator to keep it to say 35% lock it would be constantly triggering with any steering wheel movement.

3: if you do get the first two figured out, the change in handling if the system were to "engage" mid turn the difference in handling will be so major that you might not be able to correct the angle in time. in short if it engages too late the "Shock" might break away the tires very very quickly and very unpredictably. sorry if my interpretation of what your attempting to do is way off base. but ive been up for 14hrs and its bedtime

 

From my understanding when the ACD is disengaged, it does not take away power from all wheels. It just acts as an open differential.

I was thinking of getting a time delay relay so it would not trigger with every small wheel movement, just the big ones that would require slippage.

I have the same concern but there is no way to find out, untill I try it. If it does occur, Im thinking of finding a way so the pressure slowly builds up, or slowly goes down.