SVX Torque Split -Front/Rear

[LarryIII]

There is an interesting discussion about the SVX torque split on the Yahoo SVX Club (Group) site.

[Mr. Pockets]

The format used to display the messages is so confusing I'm not even going to try. It hurts my head.

It does seem, though, that some people are complaining that their rear wheels 'kick' in after considerable slippage in the front.

This is a sign of a worn transfer clutch, and those people should get their transfer clutches replaced.

The torque shift should be immediate and smooth. When operating normally, it should be seamless - no kicks, clunks or spinning tires.

Don't tell me about another part gone awry!


Randy ii

[oab_au]

Originally posted by LarryIII
There is an interesting discussion about the SVX torque split on the Yahoo SVX Club (Group) site.

Paddelsnz is putting them right.

Yes first time I've been back there in years, pop ups for everthing, even one for a program to stop pop ups
Didn"t get a message 40 though.

Harvey.

[Ron Mummert]

I've been following the discussion "over there".
It's good thing the AWD system wasn't designed by a football coach, or we'd be getting a 55/55 split. Gotta' give 110% 'ya know!

Ron.

[GreenMarine]

Originally posted by Ron Mummert
I've been following the discussion "over there".
It's good thing the AWD system wasn't designed by a football coach, or we'd be getting a 55/55 split. Gotta' give 110% 'ya know!

Ron.

I've tried to go to the yahoo board to promote local meets and such but it's just brutal dealing with those pop-ups and advertisments. I dont know why there are people over there that havent come over here. Just blows my mind.

Mike

Somebody tell those guys to go replace the clutch pack NOW.

After about 5 good "bang-lockups", things break. I've learned the hard way.

The clutch pack job is what... <150 bucks in parts.

The transfer gear is $300 and you'll still have to replace the clutchpack.

[NapaBavarian]

Originally posted by LarryIII
There is an interesting discussion about the SVX torque split on the Yahoo SVX Club (Group) site.

In the USA it ranges from 90/10% to 50/50%, front bias.

[Sonar]

Can anyone tell me WHY the torque split is measured in such a ankward way...?????

Think about it, the front wheels are "locked" to the tranny and ALWAYS have 100% , and the rear can have 0-100% ,in theory, thru a clutch of some sort.....

So, that 110% was not a bad idea, maybe it's really 200% ...!!

If, let's say, the front has 100% (as always), and the rear get 35% (of 100%), what is the torque split then ?? It is surely NOT 65/35 .....

Theese 50/50 and 40/60 "terms" are widely used, but I don't think that many reflects over that the front CANNOT have 50 or 60 or whatever, because it CANNOT be reduced thru a slip in any clutch!

Am I making sense, or should I try to sleep for a while ...?


/Sonny

[oab_au]

Originally posted by Sonar
Can anyone tell me WHY the torque split is measured in such a ankward way...?????

Think about it, the front wheels are "locked" to the tranny and ALWAYS have 100% , and the rear can have 0-100% ,in theory, thru a clutch of some sort.....

So, that 110% was not a bad idea, maybe it's really 200% ...!!

If, let's say, the front has 100% (as always), and the rear get 35% (of 100%), what is the torque split then ?? It is surely NOT 65/35 .....

Theese 50/50 and 40/60 "terms" are widely used, but I don't think that many reflects over that the front CANNOT have 50 or 60 or whatever, because it CANNOT be reduced thru a slip in any clutch!

Am I making sense, or should I try to sleep for a while ...?


/Sonny

Yes mate it is a bit confusing. It is really the percentage of torque that each end puts down to the road. Sure the front end is 100% connected, but when the Transfer clutch is fully engaged, both ends are 100% connected for 50% of the torque each. See thats not so hard is it?:

I think we had better sleep on it.

Harvey

[LarryIII]

Ron,

BULLSH*T = 2% + 21% + 12% +12% +19% 8% + 9% + 20%.

This give a grand total of 103%

As you can plainly see, any torque split that adds up to more than 100% is just so much B---S--T.

[Sonar]

Maybe the term "power transfer" is more correct in this case?


/Sonny

[svxhunter]

Percentage of overall power being delivered to the road, not percentage of engagement.

Anyone have any opinions on the lockup 50/50 issue? It seems to me this would be a good race setup, but their arguement is that it will burn up the tranny very quickly.

[Sonar]

On my Legacy, I have put a switch on the "bleeder" soleniod wire to the gearbox, and when that switch "breakes" the circuit, the solenoid can no longer "bleed" the pressure from the clutch, and thereby locks the clutch fully.
(on demand "fail-safe" mode )

I always use this 50/50 "mode" in the winter, when the tires can do that little slip that it has to, but I never use it in the summer or dry high traction roads and similar, due to the stress it puts on the transmission when no wheel can slip.

And NO, it is NOT hazardous for the tranny to have this 50/50 lock as long as you drive in such way that the wheels slip. like snow, mud and so on.
But DO NOT use it on high grip conditions like dry asphalt an similar.

If the clutch "holds" lock, no heat is generated, but if the clutch fails to fully lock (a sharp turn on asphalt or similar) , a massive heat buildup would occur that could easily fry your transfer-clutchplates.

Bur "our" (Euro models) X's do not seem to need this feature, because of the diffrent programming in the TCU.


/Sonny