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Location:
Terrigal
Registered:
May 2002
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F & G series diff strength?
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Thu, 09 January 2003 22:10
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Hello, I am hoping someone might have a rough idea of the amount of HP and punishment the F & G series diffs will handle. I'm thinking of putting one in the RA28, though unsprung weight is a concern so i'm thinking if an F series will handle the power then it might be the better option over the heavier G series.
Anyone know the weight differences between the stock T series RA diffs, F & G? And how do BW diffs compare to these?
On another note, anyone ever seen a early celica converted from live axle to an IRS rear end?
Cheers
Joel
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I supported Toymods
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Re: F & G series diff strength?
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Thu, 09 January 2003 22:55
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I just picked up and placed the Corona Mk2 F series diff I have in the backyard on a set of bathroom scales and it registered 55kg. It's complete drum to drum and with handbrake cable. I'm not very strong but I can't pick up a complete Hilux diff on my own. I'd say it's over 70 kg. T series are pretty lame...any serious power/torque + abuse will lead to a premature demise.
The boys in the US have run 450+ hp thru std MA61 F series rears. The main problem you will find is the lack of quality LSDs for the F series. The Hilux diff on the other hand has a huge range of OEM and aftermarket LSDs. The G series diffs are an order of magnitude stronger again.
I'm not a fan of the Borg Warners for a multitude of reasons - I haven't got anything nice to say about them so I won't say it at all.
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Location:
Terrigal
Registered:
May 2002
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Re: F & G series diff strength?
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Thu, 09 January 2003 22:59
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Thanks very much for going to that trouble!
From those figures i'd say the F series will be strong enough, just suppose its a matter of finding a decent LSD for it. I heard someone say that the front diff in some hilux's might have a F series LSD?
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I supported Toymods
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Location:
Terrigal
Registered:
May 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 00:12
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Any idea what the width is of the MS112 Crown diff?
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I supported Toymods
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Re: F & G series diff strength?
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Fri, 10 January 2003 00:13
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~1410mm wheel mounting hub to wheel mounting hub.
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Location:
PNG
Registered:
June 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 01:09
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Gidday
One option that you can take is to have a Mk 2 Supra (LSD) hemisphere built into your F series diff. I have just had this done and it is a cost effective approach. The completed centre has then been put into a '76 mark 2 corona casing which has had the celica suspension brackets fitted, RT141 disc brakes attached and it is all now running under my 23.
Craig
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Location:
Terrigal
Registered:
May 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 01:51
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Craig would you mind letting me know a rough cost of this work?
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I supported Toymods
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Re: F & G series diff strength?
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Fri, 10 January 2003 02:49
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Sure, but you have to find a Mk2 Supra LSD first....easier said than done. Going price here in Melb was ridiculous (>$700!!) for a non warranty 2nd hand one  . The prices actually made the TRD one look attractive. When you find one, the actual cost of swapping the hemisphere in is around $80-100.
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Location:
PNG
Registered:
June 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 04:01
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Mk 2 diffs are a bit of a problem to source, but remember that you can always use a hiace or hilux lsd centre which cost $300-$400. My diff bloke reckoned that the Mk 2 hemisphere was one of the better designs that he had seen - although he was not unhappy with the normal F series LSD.
Anyway the costs!
Mk 2 Corona diff - if you look around you should get one for around $100 - but have a look for an equivalent Hilux/Hiace that is the correct width.
Transfer of suspension pickup points from existing diff - $200
RT141 disk brake rear - $250 - have a read of the tech. article for more detail.
Reface rotors $20
New kits $60
Wheel bearings and fitted $140
Shorten tailshaft 20mm - $130
You can most likely do a dunnydoor diff for the same amount but it is difficult to get the ratios you want and the LSD is a bit suspect.
Craig
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Location:
Terrigal
Registered:
May 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 04:39
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Funny enough i've actually got a corona mk2, but its my run around car.. KNow of a few at the wreckers in Syd though. Will have to go scout those maybe.
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Location:
c'town, NSW
Registered:
May 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 05:20
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i know of a few places u can source a MK2 corona
pick and payless blacktown have 3 MX10's and a wreckers in campbelltown has an MX10 as well think its called road tested spares.
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I supported Toymods
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Re: F & G series diff strength?
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Fri, 10 January 2003 07:24
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Look out for any MS112 diffs while you are out there....it has disc brakes setup already and is likely to be cheaper than getting the RT141 backing plates/brakes and then machining to fit. Your only expense then will be to transfer the suspension points.
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Location:
1st street on the right
Registered:
November 2002
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Re: F & G series diff strength?
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Fri, 10 January 2003 10:30
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MS112 next to the MS55 and in front of a MK2 at pick n payless, all have rear ends under them
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Club President
I supported Toymods
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Registered:
May 2002
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 Re: F & G series diff strength?
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Mon, 13 January 2003 15:19
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Joel,
Mate there are 2 RA23's in canberra with F series Diffs under the back of them and the owner of one should be up here for Dyno day so if you can make it drop down and I'll point you in his direction 
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Registered:
January 2003
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Re: F & G series diff strength?
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Mon, 13 January 2003 23:34
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Sounds like you guys in OZ need a JDM AE86 diff w/ LSD  its light, disc rear as well as disc handbrake and it can handle 300hp easy.
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I supported Toymods
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Re: F & G series diff strength?
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Tue, 14 January 2003 00:00
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| Invisible Throw wrote on Tue, 14 January 2003 10:34 |
Sounds like you guys in OZ need a JDM AE86 diff w/ LSD its light, disc rear as well as disc handbrake and it can handle 300hp easy.
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Except it's T series, rare, expensive and can't handle any serious torque.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: F & G series diff strength?
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Tue, 14 January 2003 00:09
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Is Jamie with his twin-turbo 1UZFE still using the AE86 diff? That thing would have S**TLOADS of torque! 
I wouldn't go to the hassle personally, the fact that it is rare and expensive means that it'd also be expensive to replace if it can't handle the torque.
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I supported Toymods
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Re: F & G series diff strength?
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Tue, 14 January 2003 00:22
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| gianttomato wrote on Tue, 14 January 2003 11:00 |
| Invisible Throw wrote on Tue, 14 January 2003 10:34 |
Sounds like you guys in OZ need a JDM AE86 diff w/ LSD its light, disc rear as well as disc handbrake and it can handle 300hp easy.
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Except it's T series, rare, expensive and can't handle any serious torque.
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And "torture".
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Location:
Terrigal
Registered:
May 2002
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Re: F & G series diff strength?
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Tue, 14 January 2003 00:24
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I just brought a whole MS112 Crown for $500.. Will rip the diff out for my Celica, and am confident that all the bits I need will be there such as cables etc.
Then I can put the 5ME engine into my 73 Corona which currently has the M series engine.
Ended up a perfect deal really as I have been chasing both a diff and engine upgrade for the run around car.. Found it in 1.
Anyone want any Crown parts as I'll have a whole car now less engine and diff.
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I supported Toymods
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Registered:
January 2003
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Re: F & G series diff strength?
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Tue, 14 January 2003 00:59
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The T series is enough for a 4A-G Turbo.
Anything else and I'd have to say upgrade.
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Location:
Mildura
Registered:
May 2002
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Re: F & G series diff strength?
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Tue, 14 January 2003 04:39
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Going back to one of the first posts all live axle Hiluxs are G series front and rear.
HZJ landcruiser are G series front aswell.
marty
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