ady8077
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| posted on 21/7/05 at 06:59 PM |
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LSD fitting
Hi all
I've just bought a Quaife lsd 
Any recomendations on somewhere to fit it into my english diff housing?
Adrian
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omega 24 v6
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| posted on 21/7/05 at 07:35 PM |
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Why not fit it youself in the locost tradition. Is it for an english axle?
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ady8077
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| posted on 21/7/05 at 07:52 PM |
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Yes, its for an english axle, I thought you had to set up preloads and backlash?
Adrian
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Dave Ashurst
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| posted on 21/7/05 at 07:55 PM |
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Adrian
If you find somewhere local please let me know. I've got an english axle LSD in bits in an bucket in the garage ready for reassembly and
fitting in the diff.
Dave 
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Dave Ashurst
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| posted on 21/7/05 at 07:56 PM |
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quote:
I thought you had to set up preloads and backlash?
Me too
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omega 24 v6
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| posted on 21/7/05 at 08:08 PM |
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I have set them up for the hotrod race car and f2 stockcars before.
As long as you don't change the ratios you will not have to remove the pinion gear so the preload on it will not change.
Remove the crown wheel and bolt it onto the quaife lsd refitt to the axle and use the adjuster rings to move the crownwheel closer to or farther away
from the pinion to give a clearance of 4 to 8 thou (ideally 6 thou but usually there is a high and low spot) make sure both adjuster rings are
tightened to the bearing races ( this is the only part i don't have setting torques for ) and refitt the locking tabs.
I always use threadlock on the carrier to crown wheel bolts the bearing cap bolts and the locking tab bolts.
You may find that you have to dress away some of the diff casing to clear the crownwheel bolts (rare but sometimes).
Is this the quaife atb diff we are speaking about? If not you will prob have to set up the torque on the lsd plates as well.
If it is the atb then you might have a problem in the following area.
I think the theory for this diff makes it lock totally when 1 wheel starts spinning I have only fitted one of these before and the hotrod driver in
question always complains of understeer in the wet. As there is not a lot of weight in these cars ( like the locost ) I think the diff is locking
and the whole car is being pushed forward instead of turning the corner ( this is only MY theory at the moment perhaps some one here can agree
or contradict me.)
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ady8077
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| posted on 21/7/05 at 10:04 PM |
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Hi
Yes it is an ATB, but there supposed to never fully lock, their used to be probs with earlier ones loosing all power if you got one wheel off the
ground, but they added preload to stop it
Adrian
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omega 24 v6
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| posted on 21/7/05 at 10:16 PM |
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mmmmm i may have to rethink my theory.
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ady8077
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| posted on 21/7/05 at 10:23 PM |
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I'm only going on what i read on the quaife site
http://www.quaife.co.uk/products/atbdifferentials.htm
Adrian
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omega 24 v6
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| posted on 21/7/05 at 10:36 PM |
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I read it too after your last post and I wondered if the preload was to high. The car in question has a 2 plate clutch as well and gets of the line
like poo off a shovel. It makes about 10 yards on any other car off of the line.
Still not my problem as I only put the diff together for him as a favour.
Do you think you'll give it a go yourself?
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awinter
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| posted on 22/7/05 at 11:55 AM |
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It needs to have both wheels in contact with the tarmac or it spins the wheel thats off the floor. They work using the torque, Automatic torque bias
ATB if one wheel is off the floor there is no torque to bias. This is the only drawback to these atbs, I have one in my front drive Pug, its great in
the dry as it stops the power being spun away by the inside wheel in a corner, and also for quick take offs. Good in the wet and improves turn in all
round. Have to be carefull on roundabout/corner exits in the wet cos you get on the gas abit heavily both wheels spin up so the car carries on in a
straight line, easily sorted by backing of slightly. both wheels grip and your off again.
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ady8077
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| posted on 22/7/05 at 06:44 PM |
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quote:
Originally posted by omega 24 v6
Do you think you'll give it a go yourself?
Not if I can find someone else to do it 
It cost £300, so I’m reluctant to bodge it
Adrian
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