Just wondered what people thought of them both?

Bara uses standard diff but updated internals, keep the standard set up/looks £800 ish but then a updated diff mount needed really..

Then the supra conversion prob the same cost in the end and meant to be good for 800bhp so more a fit and forget diff?

Maybe I'm asking to soon as the supra conversion is pretty new, just wana do this once while the beam is out being refurbed.

Don't wana start a argument, just peoples views...

 

the supra diff is the conversion to go for Pete al together stronger and better diff

 

Supra diff

 

They will get tested properly now lol my mate dan has one in his saff and he drives like a total twat! Always doing a hard launch and always going round lol I think every time he makes a turn he drops the clutch and dose it on lock he busted his quaife 4 times!

 

Ok cheers lads, three nil to the supra so far then!

You'll have to keep us update james, see how he's getting on with it, have they designed a poly mount yet?

 

Tony (Turbosystems) is just in the process of having one made.

 

What supra diff is needed and what other modifications are needed to do the conversion
Thanks Billy

 

Tonys supra conversions bolt straight in.

 

Oh cool, I'll ring when I've got my beam out and see how he's got on.

 

Supra, anything based on the standard Cossie diff will still have weakness due to the size of the standard parts.

 

A Bara diff still uses a standard CWP doesn't it? And that's one of the weak points.

I went through diffs like anything in my old RWD Saff, I'd defo go for Supra if I still had it.

 

well the mount lasted him about 3 weeks

 

miss print he has had it in the car 3 days lol

 

Holy shit, is that a std supra mount from the back cover, or a made up one?

 

I don't no mate but its a solid mount I guess that's why it snapped polly would be a much better idea as the beams going to move on its bushes so the diff needs too aswell really

 

That's not std one. Looks very thin to me, no wonder that it did not last.

 

Yeah absolutely, needs to be all solid, or all bushed or of course something will break. Still wouldn't have thought it would that quickly though!

 

supra diff ftw, you will be surprised how much torque and r888s even a late small case will take much more than any shitty 7.5 cos diff will and thats a fact.

 

i have run 700 lbft through a small lase case diff, running at pod and loads of abuse and diff hasnt broken yet even though it had old grinding paste oil in it !

there is something drastically wrong with the setup for it to break like that.

 

yeah his driving lol and he is on shit tyres so they don't cost much lol he changes them every few weeks! Like I say that lasted 3 days his beam has all polly bushes and you may put a lot of torque through yours but I very much doubt you give it the stick he gives his he really dose drive like a cunt lol

 

that mount was 3mm we are considering making him one from an rsj lol
knocking him up a super heavy heavy duty one for him as we speak he should have it Tuesday
We can say he is a good test bed

 

Dan is a animal with his car tony should of said give him the tonka mount Hes a good lad though and drives that cossie very hard so yes he is a good tester

 

if hes on shit tyres theres even less grip though, i dont drive round drifting round roundabouts though or shit like that no, but what i do do is run 305 wide r888s and lay down alot of power/torque i put massive strain on the diff in 3rd and it doesnt break, as i said imo something is wrong somewhere noone drives as hard or with anywhere the same power as jamie ps 1100 hp supra and that doesnt chew out diffs so no yb should, something is drastically wrong with the set up somehow.

its good he uses it proper hard though, its a good test bed for the conversion and shows imo that something isnt quite right somewhere.

 

Karl he does drive it proper hard lol

 

im not disputeing that mate, hes no doubt a far better driver than me, all im trying to say is the diff will withstand it, the conversion needs looking at as i stake money thats where the problem is, they are very tough diffs indeed, there must be to much load on the diff where it wasnt designed to have that much to break like that in 3 days, especially on shit tyres no matter how hard he drives it.

 

the problem is to do with the ford rear beam and the supra rear support if you look at a ford diff even the mighty 9 inch the diff is supported in the centre only where as the supra is supported either side
we are working on a solution to move the stress points to the centre but space to the stock rear roll bar prohibits this
we have it in hand
the ultimate solution may be that we will have to modify the ford rear beam which will then make this conversion an in house fit only and not a diy home bolt in fit

 

cool tony, if you can get the stress point the same as a supra it will make for a super strong diff, good man

 

The diff is super strong as you know the thing with the std ford 7.5 diff is that it does not and cannot put these huge stresses on it's own mounts as the the crown wheel and pinion explode first lol

 

i dont doubt for one min its not a very good diff and can take it! he is only running 450ish on a t38 if it lasts 12 months in that car its a diff built by jesus him self lol. im going to go for one when i next bust mine

 

basically youve now gotta sort out fords shit ideas to get the diff to hold, its good that your getting the jap reliable drivetrain into these old sierras mate, i for one used to get sick to death of breaking cossie diffs, ive got 2 laying about here for weighing in sometime lol

 

I used mine on a ford 9 inch as I wasn't as tight as you lot lol

 

to be fair it can't be all the beams fault! Would be interesting to see how rods jag diff is mounted as that takes about as much stress as any one will!

 

they are shit mate, ive run stock skyline diff in rwd at 500 whp no problem, anywhere near the power i ran on a cossie and the diff would and did instantly shit itself, i had a gripper from jay in my last cossie but never used it hard as i broke the car for parts and went jap.

ybs are awesome but everything else behind them from the factory is shit, i hate to say it but its true.

 

I know what your saying but there's a fair few out there running mega power and torque with ford 9inch / jag diffs in modded beams without problem so its do able without doubt! But as you say the supra one will no doubt be the one to go for when sorted or may be the jag as well as that's not that costly iver

 

aye jags are beasts aswell, ive got one in the shed me old man had in his chevy grass tracker with the inboard discs, may put it on me dutton/chevy/kitcar thing lol

 

Was the failed mount in the pic, mounted with poly or alloy beam mounts ?

 

The supra diff conversion is far from new - they have been doing this in the States for years lol - we are just slow on the uptake

 

unfortunately most uk owners seem to prefer to spend 800 quid on a differential upgrade to their standard weak diifs and then explode them
they then buy another std diff and have their uprated differential fitted to that
5 or 6 std diffs later they may consider buying something else but commonly just sell the car for parts lol
we have fitted all sorts of diffs over the years to the rear of cosworths including nissan silvia ones

 

poly mounts

 

I was looking into Quaife and Grippers until Tony told me about the Supra ones so I'm going for one of those!!

I want to do it properly first time round, can't be doing with keep breaking and forking out for diffs all the time.

Many people see a replacement standard diff as a cheap option but when they've broken 4 or 5, it would have been far easier and cost effective to go for a proper one in the first place!!