LSDs / Quaifes on high power FWD cars
20 April 2007, 01:34 PM
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LSDs / Quaifes on high power FWD cars
I am about to invest in one - but interested on folks before and after experiences.
I think one of the more common ones done at the moment are on Honda CTRs but anything in the 200bhp+ seems to be helped by the treatment especially if there is torque or turbo involved.
Is it generally a no-brainer improvement? Or should I expect some angles of dissapointment? Not expecting scoobylike traction in 1st, but a useable 2nd gear in the dry would be nice.
I think one of the more common ones done at the moment are on Honda CTRs but anything in the 200bhp+ seems to be helped by the treatment especially if there is torque or turbo involved.
Is it generally a no-brainer improvement? Or should I expect some angles of dissapointment? Not expecting scoobylike traction in 1st, but a useable 2nd gear in the dry would be nice.
20 April 2007, 02:32 PM
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Yes it will make a huge difference in terms of traction, but the trade off (well worth it imo) will be some significant feedback through the wheel and a fair bit of torque steer.
The biggest thing to watch is corner exits in the wet. Where before you would see the inside wheel spin and loss of traction, in extreme circumstances you'll have both fronts spinning and massive understeer as the front end ploughs wide.
So you need to regulate throttle inputs more carefully when its wet/greasy or slippy conditions on cornering.
The biggest thing to watch is corner exits in the wet. Where before you would see the inside wheel spin and loss of traction, in extreme circumstances you'll have both fronts spinning and massive understeer as the front end ploughs wide.
So you need to regulate throttle inputs more carefully when its wet/greasy or slippy conditions on cornering.
20 April 2007, 03:24 PM
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Let me just say, I've been looking forward to getting this diff fitted so much, after all the hype, and how I've been told by quite a few people that it is awesome. It's such a shame that all these people who said it was a good thing are so NOT telling the truth ... It is beyond a shadow of a doubt, one of the very best things you could ever possibly do to your T5!!!
I am absolutely gob smacked at the difference it has made. Testing round bends where my tyres would just light up previously, I got no wheel spin what so ever. Flat out in second gear round the bend, it's just unbelievable!
On some tighter bends, a slight bit of wheels spin as you would still expect, but just a little bit, and then it just grips! In a straight line too, before in second, it would just wheel spin like mad, now, nothing! And I don't seem to be suffering from torque steer either!
So far I don't have anything negative to say about it, but I've only just got it back, and had a 5 minute blast.
But if your thinking of getting one, my initial thoughts are, definitely do it!!!
I just can't explain the difference, it's just drags you round bends now. Normal driving isn't effected at all. No torque steer in a straight line what so ever, but if your really pushing it through a bend, you have to hold tight on to the steering wheel!
I can only imagine what 4wd must be like!
Chris.
I am absolutely gob smacked at the difference it has made. Testing round bends where my tyres would just light up previously, I got no wheel spin what so ever. Flat out in second gear round the bend, it's just unbelievable!
On some tighter bends, a slight bit of wheels spin as you would still expect, but just a little bit, and then it just grips! In a straight line too, before in second, it would just wheel spin like mad, now, nothing! And I don't seem to be suffering from torque steer either!
So far I don't have anything negative to say about it, but I've only just got it back, and had a 5 minute blast.
But if your thinking of getting one, my initial thoughts are, definitely do it!!!
I just can't explain the difference, it's just drags you round bends now. Normal driving isn't effected at all. No torque steer in a straight line what so ever, but if your really pushing it through a bend, you have to hold tight on to the steering wheel!
I can only imagine what 4wd must be like!
Chris.
20 April 2007, 04:52 PM
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Sold! Thanks for the feedback - I just wanted a warm feeling away from my usual sources. I have 340bhp/370ftlbs to get though the front wheels so this is sounding better and better...
20 April 2007, 05:12 PM
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20 April 2007, 07:40 PM
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I have a Quaife fitted to my supercharged CTR yet to put in a track day with it fitted but already can clearly judge it rocks.. leaving bends/corners/roundabouts has never been so much fun. 
Would consider it a must on all high power FWD cars whilst the box is out you may want to consider uprated clutch and flywheel if needed.
Would consider it a must on all high power FWD cars whilst the box is out you may want to consider uprated clutch and flywheel if needed.
20 April 2007, 10:14 PM
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21 April 2007, 10:39 AM
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i have a quaiffe atb in my modified mg zs ,its not an overly powerfull car ,only 200 bhp/ton but its a great modification.
Unbelievable how early you can get on the power exiting corners and it just lays it down and hauls you round,imo its worth more and gives more actual on the road gain than another 50 bhp.
As said if you go daft and try to lay to much power to soon it will light up both wheels and go straight on but you would have to be being silly.
I have no negative things at all to say about it ,certainly dont get any of the negative side effects associated with the focus RS,but that could be the power delivery of turbo compared to linear V6 nasp .
I had a dice a couple of months ago with a clio sport on some damp twisty duel carriageway ,we entered a long fast right hander with me 2 or 3 lengths behind,100 metres after the corner i was 2 lengths ahead purely because i could lay the power and he couldnt.
I cant wait to try it on track ,on all those corners were 2nd and 3rd were spinning up the inside wheel and pushing me wide with understeer it will now hold the line and lay the power down and pull a real measurable advantage over a similar car without a diff.
On any powerfull front driver this would be my first mod now,forget exhausts and air filters and all that rubbish and spend your money on something that actually does what it says on the box.
Unbelievable how early you can get on the power exiting corners and it just lays it down and hauls you round,imo its worth more and gives more actual on the road gain than another 50 bhp.
As said if you go daft and try to lay to much power to soon it will light up both wheels and go straight on but you would have to be being silly.
I have no negative things at all to say about it ,certainly dont get any of the negative side effects associated with the focus RS,but that could be the power delivery of turbo compared to linear V6 nasp .
I had a dice a couple of months ago with a clio sport on some damp twisty duel carriageway ,we entered a long fast right hander with me 2 or 3 lengths behind,100 metres after the corner i was 2 lengths ahead purely because i could lay the power and he couldnt.
I cant wait to try it on track ,on all those corners were 2nd and 3rd were spinning up the inside wheel and pushing me wide with understeer it will now hold the line and lay the power down and pull a real measurable advantage over a similar car without a diff.
On any powerfull front driver this would be my first mod now,forget exhausts and air filters and all that rubbish and spend your money on something that actually does what it says on the box.
Last edited by mg driver; 21 April 2007 at 10:41 AM.
21 April 2007, 11:16 AM
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A friend of mine had a quaife ATB in his mk6 escort turbo. It was virtually 300bhp. He said it made soooo much difference and was worth every penny.
It felt very different in the passenger seat too
It felt very different in the passenger seat too
21 April 2007, 06:27 PM
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My 205 track car has a Quaiffe LSD. Its a very good unit. As stated you have to be careful on the road esp in the wet, a bit, but no more so than with a diff'd RWD car really.
On a tight twisty track / road its worth its weight in gold really. I would not track a car with an open diff anyway but if I did I bet I would be a fair bit slower, talking seconds here not 10ths.
Also as said above you can get some serious loadings put up the steering system, with big power even more so - couple this with a bumpy road and you can get some strange effects. The Focus RS had this problem.
On a tight twisty track / road its worth its weight in gold really. I would not track a car with an open diff anyway but if I did I bet I would be a fair bit slower, talking seconds here not 10ths.
Also as said above you can get some serious loadings put up the steering system, with big power even more so - couple this with a bumpy road and you can get some strange effects. The Focus RS had this problem.
23 April 2007, 05:21 PM
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Yes it will make a huge difference in terms of traction, but the trade off (well worth it imo) will be some significant feedback through the wheel and a fair bit of torque steer.
The biggest thing to watch is corner exits in the wet. Where before you would see the inside wheel spin and loss of traction, in extreme circumstances you'll have both fronts spinning and massive understeer as the front end ploughs wide.
So you need to regulate throttle inputs more carefully when its wet/greasy or slippy conditions on cornering.
The biggest thing to watch is corner exits in the wet. Where before you would see the inside wheel spin and loss of traction, in extreme circumstances you'll have both fronts spinning and massive understeer as the front end ploughs wide.
So you need to regulate throttle inputs more carefully when its wet/greasy or slippy conditions on cornering.
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