Supra Rear Diff Billet Cover

[Cochyn]

Ok so let's say it flexes but doesn't bend or brake, the flex would be ridiculously small just like you get in a Cossie beam and won't raise much concern because it's still an additional mounting point that you are purposely not using and any movement would be cushioned by the stabilising diff mount. In fact you will be setting yourself up for heartache because the only sure thing here is that yours will end up like the damaged saph. That I will be happy to put money on.

[cossyking]

Glad i never fitted one in mine sounds like a load of hastle and 6 months ago cochyn told me they were unbreakable lol i stick with cossy diffs

[B13 JUS]

Ok so let's say it flexes but doesn't bend or brake, the flex would be ridiculously small just like you get in a Cossie beam and won't raise much concern because it's still an additional mounting point that you are purposely not using and any movement would be cushioned by the stabilising diff mount. In fact you will be setting yourself up for heartache because the only sure thing here is that yours will end up like the damaged saph. That I will be happy to put money on.

No there's is more than just a little movement in that plate, I'll go with 10mm.
That plate has nothing to do withe diff mount getting ripped out of the floor, it will be more like having a solid diff mount and using bushes in the beam instead of bushes it all or solid mounting it all.

The rear beam and diff is still bolted in the same 3 points as it is standard, I'm just taking away something that isn't doing a job.
Is there anyone who has got a mk supra diff kit actually used it really hard yet to try it?
I also know it's mark (mk) has said that plate has no real purpose.

I'll take that bet on about you say, it a year in my car long enough, road, Central on the strip and a bit of track action good enough for you to test it?

[MK Motorsport]

No there's is more than just a little movement in that plate, I'll go with 10mm.
That plate has nothing to do withe diff mount getting ripped out of the floor, it will be more like having a solid diff mount and using bushes in the beam instead of bushes it all or solid mounting it all.

The rear beam and diff is still bolted in the same 3 points as it is standard, I'm just taking away something that isn't doing a job.
Is there anyone who has got a mk supra diff kit actually used it really hard yet to try it?
I also know it's mark (mk) has said that plate has no real purpose.

I'll take that bet on about you say, it a year in my car long enough, road, Central on the strip and a bit of track action good enough for you to test it?

hi justin
i understand what your saying but i think you are mistaking the plate bending to the joint moving between to different parts ,the bend i put in the top plate takes about 20tons pressure on a 50 ton brake press ,also i think your getting confussed what the top plate does ,it doesent support the weight really what it does is stop the diff trying to revolve around the front mounting near the prop adapter .it acting like a tie rod stopping the top of the diff moving backwards and forwards ,you say you have done quite a bit in your car so the kit has stood up pretty well ,i think sonic boom has 650 bhp sticky slicks launch control and hill climbs his ,his has has cracked the case like yours and he had a strap put between 2 studs to spread the load of the week case on the holding stud ,and he has said it seems to have cured it ,which seems to confirm that it is the case that has caused the problem ,i had a diff sent to me that had broke to make the new cover and it had broken both top lugs around the studs ,and 1 of them is the standard supra stud
so cant be a caused buy my stud alone .also if you goole supra diffs they brake the cases in a standard car ,i would put the top plate back on as it will try to push your diff mount into the floor ,on my covers they will have a extra mounting point each side on the bottom to further tie it to the beam ,but marks billet covers will definitly help the problem as they have more meat around the studs to support them plus its billet from a good grade alloy not cheap casting as standard plus they look good lol

mark

[Thomps]

Wow i've missed a lot this morning lol. When Justin kindly removed the diff he dropped it out with the steel plated bolted on, he noticed straight away that it flexed quite a bit and wasnt impressed. Now i'm not knocking Mark as i like him and his good at his job, but nor he or anybody else for that matter can generate the number to prove that it works, which car has run really hard with his kit fitted to see if the kit fails? Maybe the steel plate would of been better if it hadn't had a great big hole machined out? Who knows?

Mark copied the original design and that failed, its all guess work at the end of the day and you will always have peoples own opinions on what will and wont work, but unless its been tested in the correct way to see if it works we will never know which is the best way to do it.

Formula 1 spend millions developing parts and when they go testing they still fail.

[MK Motorsport]

Wow i've missed a lot this morning lol. When Justin kindly removed the diff he dropped it out with the steel plated bolted on, he noticed straight away that it flexed quite a bit and wasnt impressed. Now i'm not knocking Mark as i like him and his good at his job, but nor he or anybody else for that matter can generate the number to prove that it works, which car has run really hard with his kit fitted to see if the kit fails? Maybe the steel plate would of been better if it hadn't had a great big hole machined out? Who knows?

Mark copied the original design and that failed, its all guess work at the end of the day and you will always have peoples own opinions on what will and wont work, but unless its been tested in the correct way to see if it works we will never know which is the best way to do it.

Formula 1 spend millions developing parts and when they go testing they still fail.

hi mark
are you sure its the plate flexing and not the bolting point as with the diff out its not bolted to the beam
i didnt copy the original kit as i have never had one only seen pictures ,my kit is the same idea done a different way ,i did most of it billet as its easier to hold tolerence than welding bits together ,and when tony mannick saw it he was the guy who i think came up with the idea and did the first converstions said he thought it was well up to the job
and actually rang the other week enquiring about 2 kits .its like everything mark you cannot test every senario and wil most proberly get a fail sometime ,i think the original group buy there was aout 40 kits sold and i think i have done about 4/5 more batches of 10 and i think about 4/5 have cracked the case it just could be the case the problem .there will always be a compromise making a kit to bolt a diff from one car into another
as your limited to bolt points room etc ,the only 100% way would have been to weld bracket to the beam but people didnt want that they wanted a kit
how have you redisgned the kit to improve it and have you any pics to see
mark

[Thomps]

I cant show you or tell you everything Mark, remember Secrets lol.
I did say to Justin that its always better if you can use all the pick up points available but his adamant he wants to use the car without the plate. At the end of the day its his car so he can do as he likes but i guess we will know soon enough, if it breaks he will have to refit the steel bracket lol.

[Thomps]

Glad i never fitted one in mine sounds like a load of hastle and 6 months ago cochyn told me they were unbreakable lol i stick with cossy diffs

I wouldnt fit 1 either by the time you buy the diff, postage, rebuild kit, service, fitting kit, uprated diff plate and so on you must be up the 2k mark, you could buy a Ford 9" for 2.5k that will always be worth that, what is this kit worth second hand? 1200?

[MK Motorsport]

I cant show you or tell you everything Mark, remember Secrets lol.
I did say to Justin that its always better if you can use all the pick up points available but his adamant he wants to use the car without the plate. At the end of the day its his car so he can do as he likes but i guess we will know soon enough, if it breaks he will have to refit the steel bracket lol.

lol
its me told you and shown you everything thats why your getting good lol
if you wouldnt fit a kit beacause of the total fitting cost up round £2000 why are you going to remake the kit you have just put everyone off lol

[Thomps]

Im a honest guy as you know and i tell the truth, i also tell you too much about my plans lol. Yes you have shown me a lot and i'm grateful for you polishing my shoes lol but as you know i have other great people around me so the only way is up.

Regards the kit it isn't something i will be doing a batch of only 1 kit for Justin if he wants to go ahead with it, the time it will take to machine and the cost of the material isn't worth my while doing.

I dont want to put anybody off if they want a Supra Diff thats cool. I was just pointing out a 9" diff would be my option, i guess i'm not a good salesman lol

[The Radman]

just out of interest, if any of these kits failed and caused serious injury or death could the person who made it be held responsible? are you covered by some sort of liability insurance etc? ive often wondered as you see some right crap that folk cobble together over the yrs i take it theres no tuv testing etc involved?

[MK Motorsport]

just out of interest, if any of these kits failed and caused serious injury or death could the person who made it be held responsible? are you covered by some sort of liability insurance etc? ive often wondered as you see some right crap that folk cobble together over the yrs i take it theres no tuv testing etc involved?

hi yes you have liability insurance ,no tuv testing when we were making aluminium motorcycle chassis for racing etc ,a German company had to have then tuv approved to sell them over there and we had a chassis tested and had to do 6 weld test on tubes and send them ,there were x-rayed and tested etc and all part with flying colours ,so after a lot of yrs doing this sort of thing you get an idea for whats good or bad ,that's not to say we will never get it wrong you just try not too
mark

[MK Motorsport]

Im a honest guy as you know and i tell the truth, i also tell you too much about my plans lol. Yes you have shown me a lot and i'm grateful for you polishing my shoes lol but as you know i have other great people around me so the only way is up.

Regards the kit it isn't something i will be doing a batch of only 1 kit for Justin if he wants to go ahead with it, the time it will take to machine and the cost of the material isn't worth my while doing.

I dont want to put anybody off if they want a Supra Diff thats cool. I was just pointing out a 9" diff would be my option, i guess i'm not a good salesman lol

you didn't tell me about your plans you posted it on passion ford lol
for the money you pay me I will polish anything lol ,you do have very good people around you mark ,and its like I said you will take all this too another level as I don't have the money too pay the massive amount your forking out with this venture to those people ,and like I told you in 12 months you should be at the top of this
mark

[The Radman]

hi yes you have liability insurance ,no tuv testing when we were making aluminium motorcycle chassis for racing etc ,a German company had to have then tuv approved to sell them over there and we had a chassis tested and had to do 6 weld test on tubes and send them ,there were x-rayed and tested etc and all part with flying colours ,so after a lot of yrs doing this sort of thing you get an idea for whats good or bad ,that's not to say we will never get it wrong you just try not too
mark

good info,now i know cheers

[Nash]

My old Jag diff is tied into the rear beam hoop, as well as a rear diff mount which ties into the bottom of the diff. It's a little rough and ready as it was done 10years ago, but has been proven to work at 700bhp+ in RWD on Rods car.
For the people running serious power and who actually drive there cars hard, welding a bracket onto the beam hoop for the diff to connect to must be the best idea?