Electromagnetic replacement for viscous diff
Race Car
Joined: Jan 2015
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Hitting the gas? That's funny.
Assuming your viscous coupling is working normally, and since you personally can tell when power is being transmitted to the front wheels, then when you "hit the gas" you should be feeling a difference between your Forgelines and your twists as there is a constant 5% going to the front when moving with stock sizes and 0% going to the front with the Forgelines. However, you stated that you "notice zero diff between the two setups."
Assuming your viscous coupling is working normally, and since you personally can tell when power is being transmitted to the front wheels, then when you "hit the gas" you should be feeling a difference between your Forgelines and your twists as there is a constant 5% going to the front when moving with stock sizes and 0% going to the front with the Forgelines. However, you stated that you "notice zero diff between the two setups."
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From: Atlanta, Georgia
Race Car
Joined: Jan 2015
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https://speeddensitymotorsports.com/...Q0DwCjLfLHBiU4
Just saw this. Seems interesting. Sure would be cool to be able to control torque split on the fly. Requires standalone ECU. Discuss.
Just saw this. Seems interesting. Sure would be cool to be able to control torque split on the fly. Requires standalone ECU. Discuss.
Intermediate
Joined: Oct 2005
Posts: 31
Likes: 2
From: Norway
Yes it explained the Porsches older electronic system. But the page also tries to give information about the MB 4matic system. The author of that site obviously doesn't know anything about the 4matic, and still states thing about it. So when that information is bad, the thing I just wondered about is if the information about the Porsche system is accurate. I think you can understand why I an concerned about this, as one part of the page explains PSK and the other part states BS about MB 4matic. Is that really a reliable source then? As I was saying, there has been alot of versions of the 4matic system. Only a few of them works with clutches at all, most have three open diffs which uses the brakes to move torque around. Not going to elaborate more about the 4matic here tho. I do agree with you that the tire size difference is what makes the system work. I talked to another 996tt owner locally, and he had removed the driveshaft to the front. He told me that it was then obvious how much of an effect the awd system really had, since driving the car alot both before removal and after.
Intermediate
Joined: Oct 2005
Posts: 31
Likes: 2
From: Norway
Yes, but that is probably not controlling it with PWM, just plain 12v+. That would lock it completely. Not so much desired on street driving, but works for strip. A module with various PWM signal to it would make the front-back ratio adjustable. Not even sure the electronics will like a non modulated 12v signal over time, might fry some electronics?