Mike1

Interesting info Ian, cheers.

Anyone got rough ideas on comparative costs between the 3 options for 7 and 7.5" diffs

1. Quaife ( requires different output flanges? )
2. Plated
3. Bara VC re-rated to 240NM (upper limit for 7" on Nickel plates, achievable normal plates on 7.5" )

(Ruled out 9" VC as seems almost prohibitively expensive for a normal road car)

Porkie

iTrader: (1)

update...

Stu's wife reckons I should get a 'Per... lated' one.

Racecar doctor who is the guru of Westfield suspension set ups reckons an ATB is way forward and runs one himself in his race car....

ooooh decisions!!!



99% its going be Per..lated!

Porkie

iTrader: (1)

I can tell you the cost of the Quaife. Fitted and built in a supplied case is about £1300...

very different to the £500 that you think its going to be huh!

CTS have a diff and the flanges ready to go right now as well

Porkie

iTrader: (1)

Ian thanks for all your input by the way. awesome

polly_x

iTrader: (2)

Oooh baby babay.

Have we made a decision yet?

markk

iTrader: (2)

thats just it, ive never seen any downsides either, there have been so many manufacturers that used to fit them as std, now there are very few that fit any form of mechanical LSD.

neilm

Porkie

He's a useless fact for you, Titan Motorsport have just released a range of plated slippers and they are very nice items, we've just sold 20 english ones, but they do a 7" Sierra one which was fitted to the Caterham R500 that stormed the Top Gear Lap Time in the last series

Now if they are good enough for the Stig, they are good enough for you

neilm

Oh and my Anglia you drove, had a plated Tran-X in it.

Mike1

Yes indeed Lee! I thought it would be about £800 ish all in.

I've heard that a 7.5" VC one re-rated to 240Nm ( about the limit of the std plates ) is around £700-£800.

Did you say the Gripper one was less than a Quaife?

Mike Rainbird

iTrader: (3)

I also think that certain diffs suit certain cars, so would be more inclined to at the very least try this set-up based on the above (unless of course he is finishing last every race ) .

Porkie

iTrader: (1)

Not bothered about chasing every last second. Just wanna have fun with it mate

markk

iTrader: (2)

one way to look at it it, if you want to put the power through both wheels everytime you plant the throttle, then it has to be either viscous or plated.

Mike1

Approx how much less than the £1300 for a Quaife ATB?

Porkie

iTrader: (1)

Will let you know as soon as I do. Less than 1k I think all done.

markk

iTrader: (2)

I remember a few years ago when Tom seal first started gripper, I bought one of the first cosworth derived from him, hence i know how well they work, from memory i paid £600 for the diff unit !!

Porkie

iTrader: (1)

I might ask to borrow the Sierra for a day.... and quickly whip the rear ZF plated out of that... job jobbed!

Mike1

Cheers

Like most of the Ford mags in the last month or so, the new "Retro Ford" mag has done an article on LSD types.
There's some good diagrams on plated diffs, effect of on/off ramp angles etc if you like reading stuff - a bit different to to the Fast Ford/Performance Ford articles as well

marco polo

iTrader: (1)

hi lee

what andy/mark/tony ect and most of the other s have said ..........you cant go wrong with a plated diff , you had one in the sierra didn't you , it worked well

you know my thoughts on a plated diff,

even with the plated diff you can still set them the ideal setting for them is progressive not too much preload on the plates because will let the one wheel spin a bit quicker going around tight corners at speed bit still maintaining 2wd all the time

i have drive a good few cars with plated diffs right from mk1 escort to present day i cant fault them what so ever

the only setting i dont like is when they are set to nearly max preload they drive crap... great for straight line speed ect like 1/4mile they do then seem like a welded diff .lol...and can be very noisey with this setting




plated all the way son .lol..

marco

Mike1

You don't reckon much to the re-rated VC Bara type Marco then? Or good for a non-track car?

Fudgey

iTrader: (4)

how much does a plated diff go for in 7" with a cosworth casing?

do you need shafts etc too, of just the diff unit?

Mike1

I think Lee said he will be finding out on his shortly - I think that's what he decided on...?

marco polo

iTrader: (1)

hi mike

im going to be honest here the viscos was designed originaly for a road going friendly lsd for the normal joe soap driver ............... every progressive friction locking diff

the uprated vc is brilliant road friendly diff has more traction and better handling over the standard vc (million times better)

the standard vc in the 7 " & 7.5" diff had only 25Nm of pressure when it was brand new (mostly now are all fooked and have hardly any ...lol..)

Bara re rates the standard unit to 180Nm on the 7" and 240Nm on the 7.5"

the get the most out of any uprated vc rear diff on track is to use and oil cooler on the diff as it might lose a torque the slicon get a bit hot which might cause a bit of pressure loss (grip of the plates)

the 9" VC is the best VC diff about these can be tweeked to 900Nm same goes for them it's still best to use a cooler


with the plated diff there no loss of grip no matter how hot the oil get it's 100% 2wd no matter what unless the diff breaks ..lol...


i personally rate the plated over any diff mainly because im use to them had them in mk1 and mk2 escorts

to me they are so easy to controll backend wise ,


marco

Mike1

Cheers Marco - I'll keep that in mind for when I get mine done - Ronnie is going to find out his spec for me and I'll probably go for something similar

Porkie

iTrader: (1)

Gripper Per... lated

Pur...chased!

Mike1

Lee,
Are you at liberty to divulge an approx cost for one of those ( even if you can only say "less" or "more" than the price for the Quaife ATB ealier in the thread )?

Just as a reference for interested parties in the future searching for info

lead_foot

iTrader: (1)

Weld the diff.

You'll only notice it skipping a bit when your parking.

Good enough for Dick Johnson in his RS500 beating R32 GTR's

(yes, I know he used a Spool but it has the same effect).

3drnigel

i fitted a quaife diff to my 3 door cossie last year after blowing the original and it feels better when driving although i dont use it for track use, on the road its great esspecially when pulling away up hill with a paddle clutch. as for not braking one i have heard of people braking an ATB but only through abuse and doing donuts.
the other advantage is the warrenty you get which helps.

Porkie

iTrader: (1)

I reckon about £1k all done mate. So less

Will let you know when its all finished!

Porkie

iTrader: (1)

They make have broken the CWP (which is standard ford part still) I VERY much doubt they would ever have broken the ATB.

Mike1

Cheers Lee

So in summary for costs

1. Quaife about £1300 all in with fitting and the added bits you need
2. Gripper plated type about £1000
3. Bara re-rated on standard plates about £700(?)

M K

iTrader: (9)

good read and very helpful info

M K

iTrader: (9)

Did you get the exact pricein the rear gripper plated diff lee? And was it 7" or 7.5" ?

I'm going 4x4 and think il be using plated front and rear as for cost and power coping capabilities they seem the best option

markk

iTrader: (2)

the problem will be the front case no the diff unit !

scoooby slayer

iTrader: (4)

[quote=lead_foot;4202919]Weld the diff.

You'll only notice it skipping a bit when your parking.

Good enough for Dick Johnson in his RS500 beating R32 GTR's


didnt beat many gibson motorsport gtrs

M K

iTrader: (9)

So for best cost effective results use a thick wall casing plated diff with strentghening plate and uprated cover bolts?

Porkie

iTrader: (1)

just under £900 alll done and rebuilt.

7'

Fudgey

iTrader: (4)

sounds good lee, just as a reminder, was that price just for the diff built into the casing? did you need different output flanges or was that for the quaife?

is the installation something you can do at home? ie buy the diff and fit it diy?

i have never tried to do anything with a diff, well, had one welded once lol

markk

iTrader: (2)

depends on your use and power really.

Richie.

iTrader: (5)

Very interesting read

Porkie

iTrader: (1)

around £1300.

how the fuck would I know how easy it is!