cossie4i+

iTrader: (15)

Any ideas what is the best diff to use which can cope with 500bhp and 500lb/ft ?

Steve

NEIL A

iTrader: (6)

I use to run a gripper plated diff ,but the new Titan diffs seem to get a good write up.

carlo

iTrader: (4)

You getting a new engine ?

Rod-Tarry

I tried a quaife ATB its on its limit at that but if you dont launch should be OK.
The jaguar 10.5" is the real solution they can be picked up for £100 & then a £400 rebuild, fitted in 1999 its had zero maintenance.

DAN P

iTrader: (1)

rod would that jag diff be any good for track days ?

Rod-Tarry

Its a 3.54 power loc so i guess it would be fine.

cossie4i+

iTrader: (15)

No, this one is 480bhp & about 485lb/ft

Steve

cossie4i+

iTrader: (15)

Thats the diff i was thinking about.

Would like to do a few runs up the strip with it.

Steve

rs-tuner

iTrader: (1)

Atb diffs are not suited for drag strips more fast road and track.

JamesH

iTrader: (21)

Titan seems to be the way forward for 7.5", but I expect you're too tight. Have you blown your diff? You will always be risking it with the standard CWP and launches

Dan@Rapid-Ford

iTrader: (5)

I've got a gripper in mine.

a std diff will nearly always blow the planet gears before stripping CWP but then an uprated diff will strip the CWP instead (which is harder to do but not impossible)

JamesH

iTrader: (21)

Well I've been told in mine with 500hp and 500lb/ft it will do the CWP within the first few goes

Rod, don't you need custom beam and shafts for the Jag diff?

Mike Kerbey

iTrader: (1)

Weld it up!

dojj

iTrader: (3)

ask jb fletch which ones he's using as he's always stripping the pinion teeth on his diffs

well, he was but no one did an uprated part for that, so i'd be going with the suggestion of a totally different diff without these issues to begin with

R5FORD

iTrader: (1)

Steve,

What boost you running?

Mike Kerbey

iTrader: (1)

I do agree with dojj, the best way is to fit a different diff altogether, although it maybe costly the first time you do it, but it will also be the last time you do it.

JamesH

iTrader: (21)

True Mike, but if you're not bothered about launching, then save yourself £1000!

xr4x4rs

iTrader: (5)

look into the 8.8 irs mustang diffs

Jay,

iTrader: (4)

for standard fitment gripper is the only way

RWD_cossie_wil

iTrader: (9)

I have a Jag 10.5" in my saff, yes it's quite expensive to get it in there, but you will NEVER break it with cossie power, in the long run it works out cheaper, and you get a 6 degree rear beam at the same time.

Rod-Tarry

Zoo Motorsport modified a beam kit & supplied shafts, however ive had to get special shafts made to cope with 660ft-lb since. Its like all things a solution you can fit/forget is worth a few extra bob & a lot less stress. JB has spent more on standard diffs at £50 a pop than my whole rear end conversion which is bullet proof. Think beam was £1700 fitted with shafts + diff £450 so around 2.2k, up to 600ft-lb its fit/forget.

scoooby slayer

iTrader: (4)

i had a gripper that was good, old school plated but pretty tough.

JamesH

iTrader: (21)

I totally see your point Rod and agree with you. But could you get it done for those prices these days, and if so where from?

Staffi

iTrader: (1)

I think there's your answer Steve, and at those costs Rod's quoted must be a win win.



I had the Quaife ATB in my saff if you remember, that did shit itself after the guy bought the car off me and that wasn't near your torque at all.

Again, depends how much mechanical sypmpothy you have i guess

JamesH

iTrader: (21)

Rod is yours actually a Jag rear beam modded then? Or a Cossie 6° with further mods?

cossie4i+

iTrader: (15)

Great

Steve

cossie4i+

iTrader: (15)

It made 480bhp and about 485lb/ft @ 2.1 bar on a DD RR, it holds 2.2bar on the road.

Steve

dojj

iTrader: (3)

you could have told him to sit down first, you are going to give the man a heart attack rod quoting those sorts of prices

RWD_cossie_wil

iTrader: (9)

Not really Dojj, you are looking at £1000 for a good 7.5" diff anyway, plus fitting etc, if you smash ONE diff, you are looking at £600+ to fix it again, do it once do it right

Karl 3dr

iTrader: (9)

What jag diffs do people use? I.e, out of which car?

ajamesc

i have 500bhp and same ish torque and have a gripper diff but i did strip all the teeth off my c w and pinion leaving a round about in second lol so now have a shot peened and super finished one done by my mates dad who works for hewland engineering the diff only cost 700 pounds so cheap and strong also locks both wheels with out fail

dojj

iTrader: (3)

but steve's as tight as some indians i know who squeeze pennies so tight the queen screams

Staffi

iTrader: (1)

FPMSL....... dojj.......................

FletchCossie

iTrader: (4)

Rod/Will, can you please post Or PM me all details on your setup i.e. where to get the bits done like shafts, which diff, who to rebuild it, etc. I'm looking at rear diffs and the Titan is £1500 fitted into my case, so for another £700 may as well go Jag diff

zippyobrien

iTrader: (2)

didnt danny b run a mustange rear end and lader bars in a stage one car and run 12s?

what about that set up ?

Dan@Rapid-Ford

iTrader: (5)

If you break a quaife or gripper equipped diff you only have to change the cwp you can get a blown STD 7.5 diff for £100 Ish then swap the diff unit over as the unit doesnt break.

Rebuilding a gripper unit is cheap they need doing once a year depending on use.

Rod-Tarry

Modified Cossie rear beam.

MAD Ade

iTrader: (1)

This is the problem I have with my ATB. Behaves impecably once on the move, but spits out the teeth of the crown wheel if launched with decent grip.

MAD Ade

iTrader: (1)

Mmmm, best part of five grand for a nine inch for mine if I want to do some strip action which i would love to do

Rod-Tarry

Mines from Diamler Limo 3.54 Power Loc.