seaneylad Posted December 3, 2014 Report Share Posted December 3, 2014 Following on from my last post im set on the 3j nxg LSD just info on how they settings work It notes: a choice of ramp angles (25/70, 30/60, 30/90, 45/45, 35/35, 40/90 and 50/90) which along with the three factory preload settings of 10-15,25-35 and 60-70lbs/ft) Was advised 40/90 and 25-35 pre load. Butalso advised 45/45 and preload 50. Am I right in thinking the lower the first number the easier it kicks in? Just after advice or basic info on how thesettings and preload work? What out the two above setting is better for road use and occasional track day, also want it to be fun for some side ways hooligan fun. Its on 3.54 diff with a 2L pinto. Thanks again Sean Link to comment Share on other sites More sharing options...
Paulfosk Posted December 4, 2014 Report Share Posted December 4, 2014 40/90 will only lock the diff under load and not coasting which is good for road use, the 30lb rating is fine for 2.0lt pinto I've just ordered mine for xflow at 50/90 25/30 from James at hpe 3j nxg £575 and he's going to fit for a small very reasonable fee Cheers paul Link to comment Share on other sites More sharing options...
seaneylad Posted December 4, 2014 Author Report Share Posted December 4, 2014 40/90 will only lock the diff under load and not coasting which is good for road use, the 30lb rating is fine for 2.0lt pinto I've just ordered mine for xflow at 50/90 25/30 from James at hpe 3j nxg £575 and he's going to fit for a small very reasonable fee Cheers paul Thanks for info Does that mean the 45/45 will lock up alot easier, when under load as much? how does the preload rating affect it? Sorry im not do clued up on how these LSD works, intresting though to read up on them. Link to comment Share on other sites More sharing options...
Paulfosk Posted December 4, 2014 Report Share Posted December 4, 2014 No the lb rating determines how easy it will lock so the lower the rating the easier it will lock The ramp angle determines when it will lock ie 45/90 under load ( burnouts, drifting etc ) 45/45 will lock under power and coasting which is under braking conditions There's a top explanation of all this on www.intothered.dk Type in lsd ramp angles and enter the above Cheers Paul Link to comment Share on other sites More sharing options...
BigBubba Posted December 5, 2014 Report Share Posted December 5, 2014 Just get a Quaife ATB and forget about ramp angles!!!! (that's sure to cause a riot!!!) Get that 3:54 diff ripped out while you're at it and stick a 3:9 in there, or a 4.1:1 if you've got a 5 speed box. Best performance upgrade you'll do, it'll feel like you've got 200 horses!!!! 1 Link to comment Share on other sites More sharing options...
DT36 Posted December 7, 2014 Report Share Posted December 7, 2014 Just get a Quaife ATB and forget about ramp angles!!!! (that's sure to cause a riot!!!) Get that 3:54 diff ripped out while you're at it and stick a 3:9 in there, or a 4.1:1 if you've got a 5 speed box. Best performance upgrade you'll do, it'll feel like you've got 200 horses!!!! Have you got a Quaife fitted to yours? I have read various discussions on an ATB Vs LSD and they both have their pros and cons. Seems the biggest argument against an ATB is when one wheel lifts off the floor. However, if we are considering that most people are just going for fast road use and a bit of sideways fun in the factory car park on a Sunday morning, then for me this would suffice. Very interested on your opinions on this if you have one fitted, buddy. Link to comment Share on other sites More sharing options...
BigBubba Posted December 7, 2014 Report Share Posted December 7, 2014 Yeah, had a Quaife in my old set up. It was a fantastic diff. I was running a 190 hp 2.1 Pinto, with a leaf sprung rear end and it handled like a dream. As you mentioned, I never had it on 3 wheels on the road though!! Always felt sure footed, and had no problem flinging it sideways either when provoked. Everyone seems to discount them, preferring a plate diff "'cause that's what the rally boys use". Sure, they use them because they spend a lot of time on loose surfaces and on 3 wheels, plus they can change ramp angles to suit surface conditions to change braking and understeer characteristics. Personally, I just want something that I can fit and forget. You'll never forget you have a plate diff fitted, because the constant banging and clunking at low speeds will remind you of that!!!!! It is a personal choice, but I would have another one in a heart beat. 2 Link to comment Share on other sites More sharing options...
DT36 Posted December 8, 2014 Report Share Posted December 8, 2014 Yeah, had a Quaife in my old set up. It was a fantastic diff. I was running a 190 hp 2.1 Pinto, with a leaf sprung rear end and it handled like a dream. As you mentioned, I never had it on 3 wheels on the road though!! Always felt sure footed, and had no problem flinging it sideways either when provoked. Everyone seems to discount them, preferring a plate diff "'cause that's what the rally boys use". Sure, they use them because they spend a lot of time on loose surfaces and on 3 wheels, plus they can change ramp angles to suit surface conditions to change braking and understeer characteristics. Personally, I just want something that I can fit and forget. You'll never forget you have a plate diff fitted, because the constant banging and clunking at low speeds will remind you of that!!!!! It is a personal choice, but I would have another one in a heart beat. That's the reply I was hoping for. I have been meaning to replace my diff this year, but have only spent about a 6 weeks at home due to working abroad. Money is set aside for a few jobs and this is high up on my list. Fingers crossed, I am back home permanently in January and get a few things ticked off my list. Cheers, Buddy... 1 Link to comment Share on other sites More sharing options...
James HPE Motorsport Posted December 20, 2014 Report Share Posted December 20, 2014 Ideally (as Paul mentioned) for road use you want as setting that will lock when you are powering, and unlock when you are off power so the differential does it's job by letting the wheels turn independently. As for an ATB, pass, I have never used one myself as I have been using plate type LSD's for years with no issues. PS- BigBubba, it seems you have been a victim of the "off the shelf LSD" myth. Buy a plate type LSD from Burton's and it's sure to make horrible noises when turning corners at low speed due to excessive static preload intended for race cars with big sticky tyres. They need to be setup correctly for their intended use and if that is "fast road", it won't be any noisier than an open diff 2 Link to comment Share on other sites More sharing options...
seaneylad Posted December 20, 2014 Author Report Share Posted December 20, 2014 Ideally (as Paul mentioned) for road use you want as setting that will lock when you are powering, and unlock when you are off power so the differential does it's job by letting the wheels turn independently. As for an ATB, pass, I have never used one myself as I have been using plate type LSD's for years with no issues. PS- BigBubba, it seems you have been a victim of the "off the shelf LSD" myth. Buy a plate type LSD from Burton's and it's sure to make horrible noises when turning corners at low speed due to excessive static preload intended for race cars with big sticky tyres. They need to be setup correctly for their intended use and if that is "fast road", it won't be any noisier than an open diff Cheers for Info James Just orded mine from burton but got a local guy (up north) who is going to set mine up properly for me like you say so it wont be noisey etc. Link to comment Share on other sites More sharing options...
jamie956 Posted December 20, 2014 Report Share Posted December 20, 2014 Has anyone used a gripper diff that's what I was advised to use in my atlas, They will set up your diff from the factory when you buy it also offer a life time warranty of major components. Link to comment Share on other sites More sharing options...
FOSSIE Posted December 25, 2014 Report Share Posted December 25, 2014 The Gripper is by far the best of the LSD's and yes, they will set them to what you want. They do 'quiet' plates for the road which keep the noise down. Grippers are also very good for Competition with the correct settings. Please remember that they do not lose their preload like a ZF because of the different plate arrangements. As for quiet, maintenance free use the ATB is very driver friendly. I have built hundreds of Atlas axles over the years ( but don't anymore ! ) and have seen the results in both road and competition so base my comments on practical experience. 1 Link to comment Share on other sites More sharing options...
PaulMags Posted December 25, 2014 Report Share Posted December 25, 2014 I use a gripper in mine bought the whole set up from fosteck engineering .i use my car on the road and drag it can't fault it in any way. Link to comment Share on other sites More sharing options...
jamie956 Posted December 25, 2014 Report Share Posted December 25, 2014 I use Lea Atkins for my axle as he's local to me, he only uses gripper now in his builds. Booking mine in new year for a gripper and two piece shafts. any advise on ratios to use fast road and 1/4 mile currently on a 3.44 not sure if to change to a 3.75. Link to comment Share on other sites More sharing options...
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