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Old 08-21-2007, 08:57 PM   #1
sinister357
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Default 4 wheel drive civic

i think i remember seeing 4 wheel drive civics back in the 80's. does that sound right?
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Old 08-22-2007, 03:48 AM   #2
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Default Re: 4 wheel drive civic (sinister357)

wagons. from 84-91 honda made RT4wd wagons..

Click the image to open in full size.
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Old 08-22-2007, 09:52 AM   #3
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Default

It's a 90/10 split, so.... not that impressive. Lol.
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Old 08-22-2007, 02:02 PM   #4
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Default Re: (cb07)

i tihnk the ratio is a lil better than that at best 65/35
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Old 08-22-2007, 02:39 PM   #5
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No, the rear only allows 10% of the power.

90/10
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Old 08-22-2007, 02:47 PM   #6
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Default Re: (cb07)

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No, the rear only allows 10% of the power.

90/10
so does that mean if the front wheels were stuck in the snow, you probably couldn't get the rear wheels to spin to help?
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Old 08-22-2007, 05:10 PM   #7
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Default Re: (sinister357)

exactly according to that ratio
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Old 08-22-2007, 11:06 PM   #8
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Default Re: (veritasaequatis)

they could of just made it 50/50. that would of been easier to design and build i think.
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Old 08-30-2007, 08:39 PM   #9
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Default Re: (sinister357)

Confirmation on the 90/10 split?
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Old 09-02-2007, 05:17 PM   #10
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Default Re: (NextGear Don)

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Originally Posted by NextGear Don
Confirmation on the 90/10 split?
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Old 09-06-2007, 06:44 AM   #11
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Default Re: (cb07)

Quote:
Originally Posted by cb07
No, the rear only allows 10% of the power.

90/10
Wrong. I know this is said about all of the 4wd civics and in the case of the EF series its complete garbage. Im not sure of the system used by earlier civics, but the viscous coupling unit in my car will continue sending power to the back wheels until the front stop slipping. There is no ratio, it is proportional to how much the fronts slip. Ive had all four chirping on dry tarmac. The power fed to the rear wheels is instantaneous.

Dont be fooled by internet rumours, let people who actually own the cars tell you how capable the system is. Heres a pic to confirm the capability:

Click the image to open in full size.

Please return with some proof of your 10% claim.
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Old 09-07-2007, 03:31 AM   #12
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Default Re: (~sp33~)

y'know, i've heard this a lot before too, so i went searching through all of my honda materials and i couldn't even find a percentage?
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Old 09-07-2007, 06:55 AM   #13
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Default Re: (E-AT_me)

Quote:
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y'know, i've heard this a lot before too, so i went searching through all of my honda materials and i couldn't even find a percentage?
Thats because it doesnt work off of a percentage, it depends on how fast the front are slipping as to how much power the rears get. If the front's where lifted from the ground, you would find that a very large portion of the power would be sent to the rear wheels. To understand this you've got to see how the 4wd system works, its very basic, and very effective.

Connecting the front and the rear wheels is a Viscous coupling unit, an enclosed unit containing several thin discs encased in a thick liquid substance. When there is no loss of traction, all 4 wheels are rotating at the same speed, so the difference on either side of the VC (viscous coupling) is 0. But when there is traction loss the driveshaft on one side of the VC will be rotating faster then the other side. This causes the discs in the VC to rotate at different speeds, which causes friction. This friction drags each disc in turn until it reaches the other side of the VC transmitting power through the unit to the rear wheels.

It sounds like a slow proces, but The power transfer is close to instantaneous. As you can probably tell by this, theres no constant percentage, but instead a differing ratio of how fast the wheels with no traction are spinning. In turn, if you pull the handbrake to slow the rear wheels, the VC unit will transmit the negative motion to the front wheels, meaning the handbrake has the ability to lock all four wheels.

I hope i've explained this well enough for others to understand. Alot of what ive said actually comes from experience. Please dont hesitate to ask questions, im happy to answer.
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Old 09-07-2007, 10:02 AM   #14
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Default Re: (~sp33~)

You explained that very well. I agree with you that 90/10 just does not even SOUND right. It's Honda..I mean COME ON! COME ON SHELLEY!
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Old 09-07-2007, 12:25 PM   #15
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Default Re: (EFinawesomeman)

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Originally Posted by EFinawesomeman
You explained that very well. I agree with you that 90/10 just does not even SOUND right. It's Honda..I mean COME ON! COME ON SHELLEY!
LOL,.... mad tv... Click the image to open in full size.
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Old 09-07-2007, 04:39 PM   #16
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Default Re: (billboard)

dude, the honda brochure says that it's the liquid that solidifies under the heat, not the clutches..
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Old 09-07-2007, 07:49 PM   #17
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Default Re: (E-AT_me)

either way it turns out FWD Honda's FTW.
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Old 09-07-2007, 08:07 PM   #18
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Default Re: (E-AT_me)

Quote:
Originally Posted by E-AT_me
dude, the honda brochure says that it's the liquid that solidifies under the heat, not the clutches..
I said nothing about clutches? :

Quote:
Originally Posted by ~sp33~
Connecting the front and the rear wheels is a Viscous coupling unit, an enclosed unit containing several thin discs encased in a thick liquid substance. When there is no loss of traction, all 4 wheels are rotating at the same speed, so the difference on either side of the VC (viscous coupling) is 0. But when there is traction loss the driveshaft on one side of the VC will be rotating faster then the other side. This causes the discs in the VC to rotate at different speeds, which causes friction. This friction drags each disc in turn until it reaches the other side of the VC transmitting power through the unit to the rear wheels.
The friction caused by the difference in speed makes the liquid drag each disc transmistting power through the VC. Clutch systems were introduced in the CRV and proved much less succesful in terms of delay in power.
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