????-- (boosted 4WD)technical questions---????

thagreenteamthagreenteam New Wagonist
in Engine & Drivetrain
I am thinking of building a turbo d16a6 and my goals are 300(ish)whp.
so my questions are:
-Will the transfer case and rear diff hold up to the hp?
-Is there any way to "BEEF UP" our AWD rear diff, and tranies?







TWO other things I was thinking about (left field)
What IF you remove the front CV shafts on the AWD? what will it do?

AND

Is there any way to LOCK the transfer case to make our wagons FULL TIME AWD?

Comments

  • thagreenteamthagreenteam New Wagonist
    AND!!!will a 1992+ d16z6 work on our AWD tranny?
  • evol911evol911 familEE
    Motor will work but it would be better to use the z6 head on the a6 block. A6 blocks are tough, as for handling the HP, I think it is Epic tuning that did this to rt4wd converted, turbo sohc vtec 4th gen civic with no real problems except for worn synchros. Search youtube for the vids of the car.
  • thagreenteamthagreenteam New Wagonist
    Yeah I have seen that bad ass little hatch before, that is what made me wonder how much the tranny...etc will hold.
  • evol911evol911 familEE
    turbo_teg has put a rt4wd through its paces with a turbo motor. He can probably give you some info. :wink:
  • thagreenteamthagreenteam New Wagonist
    thagreenteam wrote:

    Is there any way to LOCK the transfer case to make our wagons FULL TIME AWD?

    What if you weld a solid piece in place of the the viscous coupler?
  • evol911evol911 familEE
    thagreenteam wrote:
    thagreenteam wrote:

    Is there any way to LOCK the transfer case to make our wagons FULL TIME AWD?

    What if you weld a solid piece in place of the the viscous coupler?

    Uhh :oops: You already psoted this in the stickied thread!
  • JakerJaker familEE
    I have to check the tooth counts on all the gears in the transfer section of the Wagovan RT4WD tranny (the info is not in the Helms), but I suspect that the rear diff only spins about 90% the RPM of the front diff, so if you put in a solid front/rear driveshaft, you'd have some troubles.

    The CRV transfer ratio (transfer gears reduction) is .434:1 (this is straight from the Helms), and the rear diff ratio is 2.533:1, so that translates to .91 revolutions of the rear diff (wheels) for every revolution of the front diff (wheels).
  • SiWagonSiWagon Council Member
    Yeh,your acceleration would suck with a 2.529(Wgn) final drive.
  • JakerJaker familEE
    SiWagon wrote:
    Yeh,your acceleration would suck with a 2.529(Wgn) final drive.

    You do understand that the rear diff ratio in this (Wagovan RT4WD) doesn't mean the same as it would for a normal RWD rear diff ratio. If this was set up as a RWD, with the gearing for the transfer case this would effectively make the FD more like 4.87:1.
  • mr_sp33mr_sp33 Wagonist
    If you took out your front CV's you'd probably end up cooking your viscous coupler.

    Theres also no lock on the coupler to make it solid. But the setup practically makes it fulltime awd anyway.

    People seem to just assume that the AWD system on the wagon is lame and similar to the CRV which it isn't.

    I don't think i've seen any video's where a 4wd wagon's front wheels have spun freely without the rears. (Again, unlike the CRV's which allow 1-2 revolutions before sufficient torque is transferred through the clutch style transfer)
  • turbo_tegturbo_teg Council Member
    my wagon had a bone stock a6 with about 200whp im guessing, i drove it hard for almost a year tons of 5,000rpm launches and hard shifts. from day one my tranny always had a 3rd gear grind but i never managed to blow the tranny up while it was turbo charged. I wouldnt weld up your viscouse coupler and leave it 4wd u will hate how the front and rear end fight eachother as u take a tight slow corner. in my CRX that i swapped all the 4wd wagon drivetrian into i pulled out my front axles and with a solid driveline was able to run it RWD which was hella scary in a super short wheelbased CRX so i didnt run it very long. so i guess if i were u i would get myself a z6 build it along with some motor mount inserts, heavy duty clutch, walbro in tank pump, and swap it to obd1 for tuning with crome and it will work awsome day in and day out.
  • mr_sp33mr_sp33 Wagonist
    Did you just plug the holes in the transmission where the front CV's would have gone? Did you just weld a section in where the VC used to be?

    Just interested.
  • JakerJaker familEE
    mr_sp33 wrote:
    Did you just plug the holes in the transmission where the front CV's would have gone? Did you just weld a section in where the VC used to be?

    Just interested.

    I'm pretty sure he ran the half shaft into the tranny on the driver's side, and used just the inner joint off the passenger side axle to plug the holes in the transmission.

    He did some custom work with the driveshaft. Have a look for all his posts. I'm pretty sure there's a picture of his driveshaft here somewhere.
  • turbo_tegturbo_teg Council Member
    ya i had some spare axles and left the inner part in the pas side of tranny, left the half shaft in the drivers side of the tranny then left some axle ends in for the hubs. i had a driveline made with out the viscouse coupler in it.
  • thagreenteamthagreenteam New Wagonist
    turbo_teg wrote:
    . so i guess if i were u i would get myself a z6 build it along with some motor mount inserts, heavy duty clutch, walbro in tank pump, and swap it to obd1 for tuning with crome and it will work awsome day in and day out.

    I think I will end up going the turbo Z6 route and what would I need the motor mount inserts for other than stiffer mounts?
  • turbo_tegturbo_teg Council Member
    u will just destroy the engine mounts
  • ragenasianragenasian Moderator
    Plus the motor mount inserts are cheap and our mounts are 20 years old. We all know that you throw a turbo kit on a car and you stop driving it like you used too :lol: I know when mine is finished it is going to get put through its paces every once in awhile :wink: so fixing anything now that could break later is money well spent.
  • turbo_tegturbo_teg Council Member
    if u want i am selling my old turbo kit off my wagon DP clears the t-case just fine.
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