View Full Version : AWD system performance Test
xboxie
14-11-2012, 12:21 PM
Hi again every one i was just wondering how well our awd system works,
for example if you were to put 2 wheels on roller and leave 2 with traction is it able to send power to
wheels with traction, i know its not an offroad vehicle, i would just like to know if its responsive enough :)
and how good it manage torque split. any info welcome just don't fight please :happy:
LOUD1
14-11-2012, 01:11 PM
;) hello champ... Pretty sure the awd's have a multi lsd system, but theres a higher precent of power thats always at the front wheels... ( not 100% sure though ) if you could, it would be awesome for some one to send all the power to the rear
Pickles
14-11-2012, 01:20 PM
oh if only it was like skylines and a simple removal of a fuse made it RWD... the fun we'd have..
MadMax
14-11-2012, 01:43 PM
oh if only it was like skylines and a simple removal of a fuse made it RWD... the fun we'd have..
the fun we'd have.. replacing rear diffs all the time. lol
the fun we'd have.. replacing rear diffs all the time. lol
We're not talking about commodores here Max... lol
I believe the power split is exactly 50/50 between the front and back. From there, the rear is an LSD, and the front is an open diff.
Regarding your question, yes it does, quite well. The system as a whole is out of the EVO 7's I believe.
It is a combination of diffs and transfer cases from EVO 6, EVO 7 GTA and EVO 7 RS. I believe the auto box and transfer case is from EVO 7 GTA, the front open diff is from EVO 7 RS, the centre and rear LSDs are from the EVO 6. Torque is split 50/50 under normal conditions and can be split 20/80 or 90/10 (front/back) under certain conditions due to LSD centre diff. The torque between the rear wheels can also split variably by the rear LSD.
I have many times on dirt road or wet grass, fully locked the steering wheel to the right and stomped on the accelerator and proceeded to do a 360. I have also driven into 20-30cm wet clay (next door neighbours empty lot) until it could go no further and from memory, when I continued to rev it, only the rears were spinning mud all over the place.
MadMax
14-11-2012, 03:26 PM
We're not talking about commodores here Max... lol
No, but for the Magna to be rear wheel drive only, as one might want when one practices drifting (why else would you deliberately disable front wheel drive on an AWD car) . . . . . I doubt the diff would cope well with that.
No, but for the Magna to be rear wheel drive only, as one might want when one practices drifting (why else would you deliberately disable front wheel drive on an AWD car) . . . . . I doubt the diff would cope well with that.
Don't the drift evos have the front diff disabled?
Don't the drift evos have the front diff disabled?
They use a blanking plate. The same could be done for a magna
xboxie
14-11-2012, 04:12 PM
Kool guys lots of good info, so would it pass these test or would it struggle
http://www.youtube.com/watch?v=tpp5tW71qYI
http://www.youtube.com/watch?v=kRniF4JQN2U
i would love to test this my self on something similar just to see how it would cope
Interesting videos.
The Magna _should_ require 3 wheels on rollers to stop it since the centre and rear have LSDs but the front is open.
In reality, it might depend on condition of diffs?
munkeymanz
14-11-2012, 10:28 PM
It's a 50/50 torque split and judging by the diffs, as long as at least ONE REAR wheel and/or BOTH FRONT wheels have grip, it should happily find the traction and be able to move.
the_ash
14-11-2012, 10:36 PM
oh if only it was like skylines and a simple removal of a fuse made it RWD... the fun we'd have..
i would have thought that the system would be similar to the subaru setup, and default to FWD when the fuse is removed.
SAVAGE ³
14-11-2012, 11:54 PM
i would have thought that the system would be similar to the subaru setup, and default to FWD when the fuse is removed.
Maybe if you mount the transfer case from an outlander (if it fits?).... which has switchable FWD/AWD modes...
SAVAGE ³
15-11-2012, 02:19 AM
Good news is the transfer case from the outlander will fit the manga gearbox. It could be fooled into working without CANBUS, and electronically it'll be easy to adapt to a magna.
Bad news is the drive ratio will be out compared to our rear diff, but more so the thing won't fit in our engine bay as it will foul on the steering rack and k-frame. The tailshaft output on the magna is below the input shaft, where as it's above on the outlander.
xboxie
15-11-2012, 04:33 AM
It's a 50/50 torque split and judging by the diffs, as long as at least ONE REAR wheel and/or BOTH FRONT wheels have grip, it should happily find the traction and be able to move.
hmm so it should pass roller test,:) i wanna try this but where to get rollers.
Good news is the transfer case from the outlander will fit the manga gearbox. It could be fooled into working without CANBUS, and electronically it'll be easy to adapt to a magna.
Bad news is the drive ratio will be out compared to our rear diff, but more so the thing won't fit in our engine bay as it will foul on the steering rack and k-frame. The tailshaft output on the magna is below the input shaft, where as it's above on the outlander.
What about transplanting the 6A12 engine as well? Its a cracking engine
SAVAGE ³
15-11-2012, 07:56 AM
The outlander has switchable FWD/AWD. Pretty sure the switching is done at the transfer case, unless I'm wrong and it's done in the rear diff which I didnt check now that I think about it.
What about transplanting the 6A12 engine as well? Its a cracking engine
Not enough torque.
xboxie
15-11-2012, 10:43 AM
so is this what manage the torque split Viscous Coupling,and is there a way to ensure its working at its best.
MadMax
15-11-2012, 11:06 AM
so is this what manage the torque split Viscous Coupling,and is there a way to ensure its working at its best.
Yeah, make sure it's not leaking and don't overwork it by driving stupid. ok?
xboxie
15-11-2012, 11:18 AM
how could it be over worked what not to do.
Yeah, make sure it's not leaking and don't overwork it by driving stupid. ok?
xboxie
15-11-2012, 11:21 AM
https://www.youtube.com/watch?v=9B0ANOI3GcM&feature=youtube_gdata_player
how could it be over worked what not to do.
LSDs try to limit slip which increases the temp of the oil and continuing to do it will boil the oil from my understanding.
Not enough torque.
Its down a bit on stock 6g74 numbers but makes up for it with a very tractable delivery thanks to the MIVEC
Dads outlander hustles along very nicely with a bootful and it would be the same weight as the AWD magna
Its down a bit on stock 6g74 numbers but makes up for it with a very tractable delivery thanks to the MIVEC
Dads outlander hustles along very nicely with a bootful and it would be the same weight as the AWD magna
That is because it has the six speed auto with a much shorter 1st and second gears compared to the five speed auto in the magnas.
Valid point. But what i was getting at is that clearance might not be an issue if you drop the engine in as well
Valid point. But what i was getting at is that clearance might not be an issue if you drop the engine in as well
Yes but what about mouting points and overall height as the outlander has quite a tall engine compartment.
SAVAGE ³
15-11-2012, 01:04 PM
Yes but what about mouting points and overall height as the outlander has quite a tall engine compartment.
Mounting could be as easy as using the engine mounts from the 4cyl TE/TF magnas... Not sure about about the later 4G motors, but the evo5-7 engines will be a direct bolt in using the magna 4cyl mounts.
There was that wagon with the evo motor last year... Almost done the conversion right, but used the evo mounts - not the magna ones which are longer, ended up drilling new mount holes in the engine bay holders. Looked so dodge.
Also turns out the electronic AWD control in the outlander is located on the rear diff... Someone should do it.
xboxie
03-10-2014, 06:35 AM
Magna AWD employs a viscous limited-slip rear differential, Evo VI transfer case, open front differential common with Evo VI RS and Evo VII, and a centre differential with viscous coupling from Evo VI. Like most viscous coupled all-wheel drivetrains, Magna AWD delivers a 50/50 front/rear torque split in normal conditions.
In theory, it can transfer a maximum of 100 per cent drive to either end and can never be "beached' if one rear wheel has traction, but in practice the system resists any relative front/rear axle speed differential by heating and locking up. will it really send 100% power to one wheel,i would like to see this :)
Yes. Done that why taking off on lose gravel/dirt/grass and with steering turned, easily slides the rear out.
xboxie
03-10-2014, 08:20 AM
Hmm so lets say you have 3wheel on none friction surface or little and one wheel full friction will that give you forward movement :)
My warm 3.8 version will spin up an inner front wheel if required, when on bitumen & turning at 30-40 degrees.
Yes and no. Go easy on the pedal and you will get out of the situation if one wheel has traction. Go hard and you will get stuck.
The only time I lost all traction was in deep sloshy mud and all 4 wheels were spinning and covering the entire car in mud. I was able to
reverse out following the already compacted path. Basically the mud built up in front of the car, acting like a wall against the bumper. It was on the empty lot next to my house in Mawson Lakes in Winter and it was funny watching people avoiding me and all the mud the tyres were flinging off as I drove up Main North Rd to the carwash next to Bunning to wash off the mud.
One time, doing a right turn (top of Torrens Rd to Park Tce to head to Port Rd), in the inner lane, there was an oil patch and the car only side stepped a foot or so before gaining traction and I was still within my lane as there was a 4WD in the outer lane.
xboxie
03-10-2014, 10:55 AM
Hmm sounds like the system also works fast from what your saying that's good to know :)
Yep impressively quick..... have felt it quickly shuffling the drive around in wet conditions on some hills drives.
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