Makeing GT4 RWD

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Postby Jazza » Mon Jul 31, 2006 11:00 pm

Like it was said before too, are you planning on doing the work yourself or paying for someone to do it? Cos its not as simple as it sounds :P :lol:
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Postby deaf_rattle » Mon Jul 31, 2006 11:27 pm

Akane wrote:If you need to ask how to turn your GT4 into a driftah, then I don't think you're capable of the job.

How about a MA61 project?


best thing you have every said.
now get back to painting shit purple little boy :lol:
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Postby Akane » Tue Aug 01, 2006 12:42 am

deaf_rattle wrote:
Akane wrote:If you need to ask how to turn your GT4 into a driftah, then I don't think you're capable of the job.

How about a MA61 project?


best thing you have every said.
now get back to painting sh*t purple little boy :lol:


I'm doing you a favour, trying to get someone to take that heap of crap off your hands, you can thank me later.
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Postby matt dunn » Tue Aug 01, 2006 12:57 am

From what I would guess at having to do this,

You will need to,

Pull the gearbox out.
Pull the gearbox apart to get to the front and/or centre diff.
The centre diff will need to be welded solid.
You will need to figure out how to get thye front 1/2 shafts to stay in
without the whole drive shafts in there, and if the front struts and hubs will operate without them.

or better yet,

See if you can remve the spider gears fron the front diff so there is no drive from the Pinion to the axels which will allow you to re-install the front driveshafts etc as per normal.

Reasemble gearbox and refitt.

I have not done this and have No idea if it would work or if it is possible.

Down sides.

Rear diff may not last.
Nom point as you wont gain any more power as you still have all the 4wd drivetrain losses as you still need to spine 3 diffs, 4 axels etc etc which all drag thye power away.

Matt
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Postby RS13 » Tue Aug 01, 2006 1:20 am

You need to weld up the centre diff, and remove the front halfshafts, leaving the CV outers in the hub and the front diff (to stop oil pouring out!). The only problem I can forsee is that the rear diff is only designed to handle 50% of outright power, therefore doubling the power.. you wouldn't expect it to last long.

However! As crnkin said, Kumakubo runs a RWD WRX in the D1GP. In his case, they've adapted a sequential RWD gearbox and an R33 GTR rear diff, with very custom suspension work!

So, I'd say at the very least, look around the Toyota stable for a factory diff, perhaps off a Soarer or Supra, and look at replacing the factory GT4 unit with that. This is very doable, as Allfours said a while back, with less weight GT4's are totally different cars to drive! Personally, I'd love to see it, but as with all of those people who claim that they're going to do big things to their cars.. only 5% end up doing it. So prove us all wrong! If I see a GT4 baggin' it up at 160km/h, I'm going to give that man a case of DB!
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Postby deaf_rattle » Tue Aug 01, 2006 7:55 am

Akane wrote:
deaf_rattle wrote:
Akane wrote:If you need to ask how to turn your GT4 into a driftah, then I don't think you're capable of the job.

How about a MA61 project?


best thing you have every said.
now get back to painting sh*t purple little boy :lol:


I'm doing you a favour, trying to get someone to take that heap of crap off your hands, you can thank me later.


heap of crap?

jealousy i think. :lol: go cry to your momma
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Postby deaf_rattle » Tue Aug 01, 2006 7:57 am

just pull out the 3s and go 1uz.
been done before, but expect to pay alot of $$$
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Postby crnkin » Tue Aug 01, 2006 10:08 am

RS13 wrote:You need to weld up the centre diff, and remove the front halfshafts, leaving the CV outers in the hub and the front diff (to stop oil pouring out!). The only problem I can forsee is that the rear diff is only designed to handle 50% of outright power, therefore doubling the power.. you wouldn't expect it to last long.

However! As crnkin said, Kumakubo runs a RWD WRX in the D1GP. In his case, they've adapted a sequential RWD gearbox and an R33 GTR rear diff, with very custom suspension work!


Hmmm, i wonder if a f series irs diff could be easily adapted....
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Postby Leon » Tue Aug 01, 2006 10:24 am

The WRX has the advantage that it is a North - South engine, so you can sling a conventional rear drive gearbox behind it, as compared to the East - West configuration of the GT4 with the gearbox beside it.
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Postby Ako » Tue Aug 01, 2006 11:35 am

My VR4 is getting this treatment next week (need to sell one car + get a runabout first, VR4 is currently the daily).

Exactly the method RS13 described.

Lock the centre diff - same as locking any other diff. Ideally get it done by a pro - if it comes apart or goes wrong, you lose a whole gearbox.

Remove just the front AXLE - leave the CV's in at both ends.

The gearbox ones a) hold oil in and b) make sure everything stays kosher in there, the hub end ones well.. hold the hubs together. And no, they don't fall out, considering they need to be hit with a hammer to get them out of the gearbox!

Don't even need to pull the box off the car to do it in a mitsi either, dunno how hard a toymota 4wd box is to dismantle or where the centre diff is in them.

And voila, RWD ex-4WD. I've seen it done countless times on subbys + mitsis.

Only issues - transfer box and rear diff is now recieving double the power they were before. Upshot is that traction dissapears so the loads on them have probably gone down :lol:

4WD's converted tend to be a lot more loose than a RWD with equivalent power as well - its an absolute hoot :lol: I don't know the reasons why.

Only two reasons I'm not just disabling drive to the front diff - a) my speedo is driven off the front diff crownwheel, no front diff = no speedo, and b) this way its only an hours work for me to go back to 4wd for grasskanas :D
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Postby Prymal » Tue Aug 01, 2006 11:32 pm

Transfer case will gio BANG , then the rear diff

Love the idea , but yeah - not the most practical odf things

In oz here we have one of the most " infamous " rwd " gt4's " about

its had ALL the AWD gear removed ( as most of its in my gt4 now ) and it was replaced with a twin turbo , North south 1uz , 5 speed box , and a JZA70 rear end ..

You too can do this at home if you have about 30 grand - and a few skilled engineers at your dosposal for a driftable , 320 KW at the rears , 11 second HSV, FPV, NISMO, RALLIART, HONDA, KAWASAKI, SUZUKI or pretty much anything this side of supercar exoptics eater

You could also attepmt to North south the 3sgte , use a w58 box and convert that the same way thats done in sprinters/ rwd celcias and the such

The advice is pretty clear - if you want to drift - grab yourself a Supra , or a RWD corolla , and do it in that - its gunna be a hell of a lot cheaper to do , alot easier to repair of you Dori damage it , and all the hard work of having a turbo RWD platform is already there..

Gt4's should stay in rallying , where grips important
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Postby sergei » Tue Aug 01, 2006 11:58 pm

stuff the RWD crap, make the thing turboshaft powered, I'm sure it is possible (with lots $$$$$$$$$$$$$$$$$$) to get about 1000hp unit.. then you can run it on diesel ;).
something along the lines of:
Image
although this unit is "only" 425kW...

Here, it is just a big turbo mechanically rotating the output shaft:
Image
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Postby MasCam » Wed Aug 02, 2006 7:51 am

But where does the blow off valve go???????????????


And how do you fit the pod filter :?: :?: :?: :?:
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Postby sergei » Wed Aug 02, 2006 9:06 am

but imagine 5inch exsaust!!!
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Postby Jazza » Wed Aug 02, 2006 9:53 am

So im guessing you cant have a sunroof with one of those? :cry:
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Postby Trls250s » Wed Aug 02, 2006 11:45 am

I use to do engineering and we played with gas turbine engines, they would defiantely not pass the new dB legislation given out by the goverment.

Need a big fat silencer... 8O
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Postby IH8TEC » Wed Aug 02, 2006 1:07 pm

who cares about sunroof or bov's, the sound of them spooling up is so sweet, god i love working on these for a living. :D
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Postby TRIKI » Wed Aug 02, 2006 5:45 pm

cheers crinkin, drifting would have never even been invented if all people had attitueds like some of the guys on here. Where theres a will theres a way. You guys can fight amougst your self now, im getting outa the hornets nest.
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Postby sergei » Wed Aug 02, 2006 6:08 pm

oops, I completely derailed this thread... sorry
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Postby summin » Wed Aug 02, 2006 6:48 pm

Adydas wrote:...and if you want to go supermarket shopping get fwd...


Now now...no need for that type of slander :D

Funny how some of the "supermarket shopping" fwd's on this forum will eat some of the bigger engined rwd and 4wd cars out there for breakfast :D

But hey, what the hell do I know anyway :P

Back on topic...I saw an evo7/8(cant remember) on trademe last week that was converted to rwd, and was apparently used in Fast & Furious - Tokyo drift. From memory it had custom front hubs, and plates made up to block up the holes left in the gearbox. Cant remember what they did reg the diff though...Apparently it was modified by Rhys Millen for the movie (He also did a lot of the stunt driving for the movie Im told...)

Might be worth seeing if its stil on there...
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