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Location:
adelaide
Registered:
November 2004
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gz20 IRS diff into ra28
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Sat, 01 January 2005 11:58
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does anyone know if this can be done and how hard it would be???
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Location:
Brisbane
Registered:
June 2003
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:01
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yeah it could be done. but itll be VERY expensive. FYI, Gz20 rear end is the same as MZ21 and MA70 rear ends. Same crownwheel size and interchangeable with hilux centres...
you are better off putting either a live hilux rear end or a 9" 
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Location:
adelaide
Registered:
November 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:02
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i already have a wrecked soarer in my front yard
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Location:
Brisbane
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:05
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If you're a fabrication genius with a lot of time on your hands, sure why not, it could be interesting.
On the other hand if you just happen to have a GZ20 rear end and a Celica lying around and thought it might be a good idea to combine the two, think again.
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Location:
Brisbane
Registered:
June 2003
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:13
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mine is gonna be a big enough PITA replacing the F with a G series...the centres are entirely different and a LOT of work and money needs to be spent to do it properly....(if in fact i do go the G series)
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Location:
adelaide
Registered:
November 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:16
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yeah, i just thought it would be cool to have irs in the 28, ill probably abort the idea when i have a serious look
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Location:
townsville NQLD
Registered:
February 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:20
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i would expect the celica chassis would be too weak in the centre to have a diff just bolted there. the GZ20 would probly have extra thick metal around wher the diff bolts in so it doesnt just tear out when u nail it
brett
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Location:
Brisbane
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:25
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Actually the diff and suspension in a GZ20 are mounted on a subframe, and from memory there are 4 giant bolts attaching the subframe to the chassis. The hard part is getting those attachment points in your chassis and making it strong enough to handle the loads.
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Location:
adelaide
Registered:
November 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:29
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so if its all on a sub frame and all came out in one peice, couldnt it be positioned in the 28 and then reinforced where it needs it?
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Location:
Brisbane
Registered:
June 2003
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:32
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re-inforcing a 30 year old celica chassis to handle 100kg+ of diff subframe, which is supposed to be built so it can cop a lot of torque and power is not going to be an easy test. I seriously doubt it would EVER get approved...
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:35
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| V8_MA61 wrote on Sat, 01 January 2005 22:32 |
re-inforcing a 30 year old celica chassis to handle 100kg+ of diff subframe, which is supposed to be built so it can cop a lot of torque and power is not going to be an easy test. I seriously doubt it would EVER get approved...
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Its easy to do and will easily be approved. I had a IRS setup made to temporally suit a TA Celica so see if it would handle ok. The car handled like shit so the project was abandoned 
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Location:
adelaide
Registered:
November 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:37
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why did it handle so bad? so your saying not to bother trying?
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Location:
Brisbane
Registered:
June 2003
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:38
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well ill be fucked...who ever thought that would be allowed on the streets 
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:48
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Its kind of hard to explain but i'll give it a go.
At first we set it up so that both wheels had 0 camber. This was fine when driving in a straight line but when taking off hard and the rear bogged down, it was only the inside edge of the tyres that made contact! So traction was a bit on an issue. Cornering was almost impossible with this setup also.
We changed the setup around a few times to try and get the tyres to have 0 camber when accelerating and cornering with some success but incountered problems elsewhere. The rear end of the old Celicas is to light for a convectional IRS setup. A control blade setup like on the newer Jags and on the BA Falcoons would be a different story but by the times you get it all fitted, the car would be heavy enough to suit the old IRS.
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:50
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| V8_MA61 wrote on Sat, 01 January 2005 22:38 |
well ill be fucked...who ever thought that would be allowed on the streets
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A full rollcage is enough to enforce a car! Done correctly the body has no effect on the strength of the car anymore.
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Location:
adelaide
Registered:
November 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 12:55
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what was needed to set it up? the ra28s are heavier in the arse than the TAs but how much weight would be needed? is it worth f@#$ing around with?
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 13:01
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The car we had it in was just a test car so it was bolted to the current shock, swing arm and rear tow points aswell as through the floor.
I dont think its worth it! I think conventional IRS is ghey and and a waste of time. Thats why you find it still used in Holdens. Control blade is the way of the future.
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Location:
adelaide
Registered:
November 2004
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Re: gz20 IRS diff into ra28
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Sat, 01 January 2005 13:04
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yes well i dont think ill be bothered trying to fit control blade so i guess ill stick with the g series cinversion, much easier and cheeper
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Location:
Montrose, VIC
Registered:
May 2002
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Re: gz20 IRS diff into ra28
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Sun, 02 January 2005 07:51
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It could be done and made to work fairly well, but basically would involve cutting the floor out of the whole back half of the car and fabricating everything to be spot on. A lot of effort, but then if you enjoy the challenge....
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Location:
Canberra, ACT
Registered:
September 2002
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Re: gz20 IRS diff into ra28
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Sun, 02 January 2005 11:36
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so does anyone have a diagram of a control blade style setup?
I did some googling and also looked on the ford australia website. found some pics, but they weren't very good. It does look quite compact, which I guess is good for family cars
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Location:
New Zealand
Registered:
May 2002
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Location:
western queensland
Registered:
September 2004
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Re: gz20 IRS diff into ra28
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Tue, 04 January 2005 11:04
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i know it's nissan, but have you thought of a silvia cradle? upper and lower control arms, good brakes, cheap and a heap of goodies available like mech lsd's 
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