It is probably time for the fabricators to work on a solution other than Supra. Obviously you need to get the ratio you want but a yank alloy one appeals to me. I would like a front diff option other than R n D but that is only due to the cost of those buggers.

 

That's it though thiers not enough demand modified cossys are a minority nowadays only people with know how or mates with it are going to bother trying something else supras the only one that has had the conversion kit made that's why we've all got them don't listen to gayjay he drives a focus lol

 

Apologies for my earlier post, some covers are still available it would seem. I think you can get them Without the square corners.

 

Good to know covers are still available thanks for posting that. I've recently got a 3.9 supra diff but don't have any of the other parts needed yet.
my 7.5" ford doesn't sound healthy and has some free play on the input side so want to get it swapped over this winter. Be nice to get a 6 degree beam ready for the supra diff to bolt straight in. Anyone know if these are available?

 

 

mat arnt you rwd? The 3.7 is the one more suited I believe

 

Funny how one broken CWP makes the diff crap.
The problem that people don't consider is not hp its torque and where in the rpm range that occurs.
Other considerations with the Ford units are the ally cases. They distort under big torque, this unloads the mesh of the CWP, it jumps a tooth and munches itself into oblivion.
This is the case with the front 6" and all the rears (excpt 9").
Lots of work was done when using for competition, first was don't use the 3.9 front, the physical tooth count is too low on the pinion to get any cut into it. That is why step offs came about for the MT75.
There are motorsport backlash settings, this does affect life and noise though.

If i could I would upload a video of us launching the Escort on 235 Pirelli slick tyres on launch at 1.5bar boost at 3600rpm with over 500nm torque. No wheelspin in the dry.

Still using a 7.5" rear but a home made front diff/shafts setup from the rear of another vehicle. Same ratio front and rear, both plated LSDs.

 

 

 

it can be either or as the transmission maps decide or i leave the diff open and its 100% rwd. I've done rallies like that in it.

 

 

 

 

I am rwd mate. I believe you can get the supra diff in a variety of ratios. The 3.9 might be a little short on the motorway i have not done the maths but it should really pick up well.

 

Sound mate won't belong until your releasing more ponnies lol that engine is good for it

 

Bollox its reliable youth

 

 

I think the Cossie was always too long geared and anything that can shorten the gearing makes for a more lively car...that is certainly the case on the 4x4 but not sure if the 2wd was any different?

 

Yes, Bara said to me that no matter what you do the 3.9 CWP is the weak link and will be the bit that breaks first on my diff. He said that it will not take the quaife diff with it so if I break it I can sell on the diff and then upgrade. He thought it was marginal at 500 bhp / 500 torque depending on how it was used but he is pretty certain that my stroker at 630bhp and whatever bigger torque it makes that it will most likely not last all that long.

I am hoping that my car being light will help as ultimately it may well just spin the tyres. I only have 215 section track day tyres as that is as big as I can go.

 

lol my focus won't be then

 

The thing for me was the usability and fun and with the YB they always break something lol and the expense of parts ect these days for me its not economic sense

 

you know me mate just playin and you know I wanted a frs but not fwd reason behind my project

 

And itll be a special car mate when done and cant wait to see it

 

This is the sort of thing we have been looking at for mine. 9 inch yank CWP in 3.9 or any other ratio and then a bespoke ally housing and then output shafts to suit and then made with brackets to fit the ford normal setup. They can take 1000’s of bhp and much lighter. Similar for the front too.

 

 

 

 

 

 

James have you got a pic of the inside of your cover had a chat with mt yesterday about one of his covers he has he mentioned it would need the baffle from the og cover welding in the bowl of the new cover my mk has no baffle or anyone else's I've seen

 

 

 

 

It's funny how this post has changed over the last week . My Supra diff is all plumb up

 

Hmmm maybe meaning plumbing for cooler
"I have a silver cover it was from my first batch that I didn’t put the baffle section in so if you wanted it you would have to cut that piece out the inner bowl of your std cover and weld it into mine. The cover"

yes Ian nice to have morphed into an interesting post on here

 

hi toby
mine have always had a baffle in and marks/mt put one in his later ones as they need it or they will blow the oil out breather
mark

 

what is that sensor doing ?