Author Topic: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained  (Read 28907 times)

Offline Daviticus

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #15 on: December 30, 2008, 09:30:23 PM »
Way to bring up a year-old thread, haha. I, until recent economic down-turn, had still considered this.

Of course I can get it to work. It's a simple rear subframe swap, trans swap, shifter linkage install [same as an H22 swap], and a new exhaust.

Find either a complete manual-trans CR-V or a complete driveline [with rear subframe, and front hubs/brakes] and we'll go from there. It'd be easiest to take measurements of the clutchplates physically when they're out of the VC. It should be as simple as drilling out the spot-welds that hold the stock DC subframe, and welding the CR-V unit in place. Suspension should be identical; wheelbase should be identical; track-width should be identical.
Quote
Of course the bandwagon is nearing the end of its shelf life. It's gone from foreign, to underground, to baller, to overdone, to being supported by the entry-level aftermarket. That's usually when things are about to die off.

Just waiting for the next trend.

Lather, Rinse, Repeat.

Offline Travis?

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #16 on: December 30, 2008, 09:40:54 PM »
haha yeah are little convo a bit ago got me thinking again, lol have you seen this
crv del sol, pretty bitchen
http://www.honda-tech.com/showthread.php?t=1708933

so if i came up with a crv, would you be up to doing a drivetrain swap? i think this would be badass
i wanna do it damn it lol

Offline Daviticus

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #17 on: December 31, 2008, 04:07:02 PM »
haha yeah are little convo a bit ago got me thinking again, lol have you seen this
crv del sol, pretty bitchen
http://www.honda-tech.com/showthread.php?t=1708933

so if i came up with a crv, would you be up to doing a drivetrain swap? i think this would be badass
i wanna do it damn it lol


Yep. Bring the CRV, and we'll git-r-done.
Quote
Of course the bandwagon is nearing the end of its shelf life. It's gone from foreign, to underground, to baller, to overdone, to being supported by the entry-level aftermarket. That's usually when things are about to die off.

Just waiting for the next trend.

Lather, Rinse, Repeat.

Offline slomofo

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #18 on: December 31, 2008, 05:00:45 PM »
Anyone know the torque split on a CRV? Isn't it something like 80/20 F/R? Kind of pointless, wouldn't you think?

The Supercharged AWD DC2 had a better torque split, but sadly never went into production.

PS - If you do decide to do this, I've found that fitting CRV wheel hubs into ITR trailing arms is much easier because the ITR has a larger wheel bearing.

PSS - The Honda pumpkin sucks.

Offline Travis?

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #19 on: December 31, 2008, 05:03:19 PM »
Anyone know the torque split on a CRV? Isn't it something like 80/20 F/R? Kind of pointless, wouldn't you think?

The Supercharged AWD DC2 had a better torque split, but sadly never went into production.

PS - If you do decide to do this, I've found that fitting CRV wheel hubs into ITR trailing arms is much easier because the ITR has a larger wheel bearing.

PSS - The Honda pumpkin sucks.
yes until the front wheel begin to spin, then the rear diff lock up and then it 50/50, get rid of the clutchs in the diff will make it a permanit 50/50, the fisrt post in the tread explains it all

Offline slomofo

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #20 on: December 31, 2008, 05:20:54 PM »
Anyone know the torque split on a CRV? Isn't it something like 80/20 F/R? Kind of pointless, wouldn't you think?

The Supercharged AWD DC2 had a better torque split, but sadly never went into production.

PS - If you do decide to do this, I've found that fitting CRV wheel hubs into ITR trailing arms is much easier because the ITR has a larger wheel bearing.

PSS - The Honda pumpkin sucks.
yes until the front wheel begin to spin, then the rear diff lock up and then it 50/50, get rid of the clutchs in the diff will make it a permanit 50/50, the fisrt post in the tread explains it all

Are you sure the first post explains it?

Offline Daviticus

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #21 on: January 01, 2009, 01:11:39 PM »
Are you sure the first post explains it?


Taken from my first post.

Quote
So how does it work?

First, one tidbit of information that makes the RWD portion of the driveline swap work:

The output shaft from the transmission that transfers power to the rear differential, is powered 100% of the time - YES, it's essentially a 50/50 torque split, no slippage between front and rear output shafts.

The rear section of Realtime 4WD works on the same premise that a Viscous Limited-Slip Differential works - when both the input shaft and output shaft are spinning at the same speed, with the same resistance or power on either end, there is no fluid resistance in the clutch-packs, and the driveline is essentially open. This holds true to the center differentials of such technical systems as Subaru's AWD, Mitsubishi's AWD found in the late-model Evolutions, and even the older DSM setups. When slippage of the front wheels is detected in the RT4WD system [slippage, in the FWD portion of the system, means a loss of traction and the driveline accelerating, which accelerates both the front running gear and the rear output shaft], the speed of the rear output shaft and the speed of the rear wheels differs, and creates a fluid friction in the clutch-packs, resulting in power being applied to the rear drive wheels.

Controlling that slippage - even eliminating it altogether - is KEY in making this system work in a performance-based setup.

Also, concerning the rear differential:

Quote from: RallySol via TLAR Engineering Website
Future plans involve swapping the CRV propeller shaft and rear differentail with their Civic Wagon counterparts. As luck would have it, there is only a four thousanth (0.004) difference in ratios between the two. The CRV's rear differential has a ratio of 2.529 where the Civic Wagon's rear end is 2.533. If anything, the difference in ratios would send that much more power to the rear. The real reason for the change is to have a consistant power split between the front and rear wheels as well as the luxury of using a limited slip differential at the rear. The CRV's rear differential uses a pump system with a clutch pack that transfers power to the rear wheels when the front wheels slip. While innovative, this system is slow to activate making it mostly usless for competition. The Civic Wagon used a viscous coupler between the transmission and rear differential that provides constant power to the rear wheels. The Wagon's rear differential is similar enough in design to Honda's D series Civics such that LSDs sold for the D series Civics can be fitted into the Wagon's rear differential carrier with minor modification. Using the Wagon's rear differential also affords the use of stronger rear axles.
Quote
Of course the bandwagon is nearing the end of its shelf life. It's gone from foreign, to underground, to baller, to overdone, to being supported by the entry-level aftermarket. That's usually when things are about to die off.

Just waiting for the next trend.

Lather, Rinse, Repeat.

Offline slomofo

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #22 on: January 01, 2009, 08:24:49 PM »


Taken from my first post.


Positive it's from your first post?

Offline Daviticus

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #23 on: January 02, 2009, 01:21:21 PM »


Taken from my first post.


Positive it's from your first post?

Not this again.
Quote
Of course the bandwagon is nearing the end of its shelf life. It's gone from foreign, to underground, to baller, to overdone, to being supported by the entry-level aftermarket. That's usually when things are about to die off.

Just waiting for the next trend.

Lather, Rinse, Repeat.

Offline slomofo

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Offline Walterpoova

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #25 on: April 28, 2019, 04:38:40 AM »
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Offline JesusShepE

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Re: CRV Drivetrain Swap Into Integra; Honda's Realtime 4WD explained
« Reply #26 on: May 05, 2019, 07:16:30 AM »
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