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| Welded diff https://www.ausmini.com/forums/viewtopic.php?f=2&t=75101 |
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| Author: | Beanie [ Fri Jan 20, 2012 1:03 pm ] |
| Post subject: | Welded diff |
Yeah bit of a crazy one ... any one used one .. How bad was it ? and will it just make a car understeer in the dirt.. Im thinking of building a new car for hay this year .. and i either buy a quaife diff of build a CIG locker... I kinda like this idea just puts a smile on my face thinking about it ... Beanie |
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| Author: | GT mowog [ Fri Jan 20, 2012 1:21 pm ] |
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Many moons ago, we did try a CIG locker in a Race Car I was looking after. This was a tarmac only car. Times were quickest with this diff, however, the driver found it very very heavy on the steering and while he was OK with the 7 lap races he really didn't like do the 10 lapers. Certainly in the pits, (not sealed) it really under-steered, but the car wasn't set up for that either! We did end up going back to a Sailsbury which was the choice of diff in the day. These days, I run Quaifes in just about everything and IMO, it is the best all round diff, especially on unsealed roads. Gives very adequate traction but don't rip the steering wheel from your hand either. |
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| Author: | drmini in aust [ Fri Jan 20, 2012 1:40 pm ] |
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CIG lockers were popular in speedway Minis, so they say. |
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| Author: | Haydn [ Fri Jan 20, 2012 4:32 pm ] |
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Chris, I raced with one years ago and it gave great grip and steered ok whilst you had the power on.... Missed a gear one lap and speared straight off as i couldnt turn it. 
Every Dick and his dog's got a Quaife at Hay now so in this case being a lemming has got some merit. Cheers. Haydn |
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| Author: | Beanie [ Fri Jan 20, 2012 6:45 pm ] |
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Yeah thats kinda what I figured ... I don't think that a motorkhana would be fast enough to get the car to turn in ... Now to look for a car  thanks for the replys guys
Beanie |
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| Author: | TheMiniMan [ Fri Jan 20, 2012 6:53 pm ] |
| Post subject: | |
yeah i ran locked diffs in my speedway minis for years & years,,, they work good BUT!!! we didn`t do the "Usual" weld it all up" trick we "oxy-welded" just the valleys in the exposed planetary gears sections,,, so,,, in effect, you could pull the diff apart (as per normal) then fit the new (welded-up) planetary gears,,, & bung it all back together so,,, this gave it a tiny bit of play,,, which turned into more play the more you drove it, because the teeth beside the welded sections would "bite" into the oxy welded sections & allow a bit more & more play, (to a point) bcause the oxy weld is soft,,, now i certainly don`t recomend arc welding them, becasue that`s too hard & bits will "chip-off" & then float around in your box,,, & that wouldn`t be nice right????? now oxy welding diffs this way was pretty good for in the pits etc (tight turns) because it gave us a little bit of forward & aft play... But also made it pretty easy to fix "IF" we busted an inner axle... then it is just a simple swap out the inner axles as per normal & re-fit the welded planetary gears back in easy-peasy
But,,, i certainly wouldn`t recomend it for tarmac/bitumen,,, i ran one of our sports sedans at Lakeside with locked diff in it, a few times, & it wasn`t nice,,, do-able & grippy,,, just not nice, & yes tiring, & wears tyres a fair bit quicker than slippery diffs do just be careful they don`t bite you & bitch-slap you,,,--> you will need to take charge of the steering & throttle --> DON`T let it take charge of you I`ve had a pile of people come back from driving locked diff minis , shaking like a leaf ... very sweaty hands... more than a little red with embarasment,,, & also with decent sized dents in the wheels from being "Pulled" into a gutter
so,,, if you`re going to do it, then yep they`re cool for the dirt, but remember to simply "Take-Charge" & do it with confidence,,, or they can/will bite you if you`re doing it on the tarmac then it`s a just the same except a bit harder on the arms & rips your tyres pretty quick
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| Author: | miniimports [ Fri Jan 20, 2012 6:53 pm ] |
| Post subject: | re quaiffe |
if interested i have a welded diff sitting around somewhere in the mancave of a factory or can can supply a Quaiffe also for under $1100 cheers josh |
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| Author: | TK [ Fri Jan 20, 2012 8:19 pm ] |
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What did we say Matt, you have to fit the austin 1800 steering wheel? You need Popeye arms on hard track. |
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| Author: | Morris 1100 [ Fri Jan 20, 2012 8:24 pm ] |
| Post subject: | |
I had a mate that ran a welded diff in a relay race at Winton. It was fine till the pace car came out for a prang and he kept spinning off! It was alright when he had the foot down but he couldn't drive it slowly. With Holden diff we used to fill them with lead instead of welding them. You can't break the lead. You can break the welds.  The lead gives a slight cushion, when it gets a bit of lash you just melt it again.
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| Author: | NG [ Fri Jan 20, 2012 8:28 pm ] |
| Post subject: | |
fit power steering lol. |
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| Author: | drmini in aust [ Fri Jan 20, 2012 8:28 pm ] |
| Post subject: | |
I once converted an od Dodge diff to a winch. Welded the spider gears a few times but the welds would break as they were brittle (gears are hi-carbon steel). Finally I cut 4 bits of 3/8 round bar 1" long, stuck them in between the gears and welded them to the diff centre. Problem solved... 
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| Author: | TheMiniMan [ Sat Jan 21, 2012 9:24 am ] |
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TK wrote: What did we say Matt, you have to fit the austin 1800 steering wheel? You need Popeye arms on hard track.
funny as Ty, cause i use an 1800 wheel in my speedway mini
& Doc,,, that`s why we "oxy-weld" the planetary gears the way i said, because they don`t break , they don`t chip bits off,,, the oxy weld is nice & soft, bites in good & works a treat... i get them red hot, weld them & let them cool naturally so they stay soft, then just grind/shape them up clean & fit em back into your std diff,,, job done If anyone is interested, i have a few "already-welded-up" gears here so you can look at them maybe i`ll take a photo or 2 yeah? EDIT_--> Oh & a couple of issues that i forgot to mention tho--> if you break an axle,,, the car will pull violently in the direction of the broken axle,,, the other axle will do all the work & the car will spear in the broken axle way & 2ndly, if you had even seen a "Fully-welded" diff,,, as in someone has fill-welded the whole center to lock it up solid,,, then what actually happens is as it`s all cooling , it contracts & pulls & distorts quite badly & usually pulls the 2 inner axles out-of-whack,,, so then they`re not in-line with each other & you`ll get very worn diff bearings in no time at all & the bushes on your out-put covers will wear dramatically quickly & you`ll get oil leaks very shortly etc etc etc,,, not a pretty way to lock-up a mini diff at all |
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| Author: | Convertible Mini [ Sat Jan 21, 2012 1:35 pm ] |
| Post subject: | Welded diff? |
I used to do exactly as Matt is saying to my speedway Mini All under Jack's instructions of course. It was a cheap way out and used to work well. But by Jesus did I have some biceps those days. The welded side gear teeth idea worked well till the little sun gears used to blow to pieces. That is when I ended up with a gearbox full of neutrals a few times. Then later on when I could afford one I bought a Jack Night Limited slip with semi straight cut gears. That was good but it made the car feel a bit different especially coming out of the corner under full power. GOD that used to be fun..... We used to do it on the dirt. My Speedway Mini is still in the corner of the shed. One day I will pull it out and strip all the good bits and sell it. I will not be doing any more speedway racing in my Mini any more, not in this life any way. I used to love it crapping on the big Ford and Holden in a little Mini. Those were the days. |
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| Author: | mickmini [ Mon Jan 23, 2012 2:29 pm ] |
| Post subject: | |
I have a Fred Sayers cone diff and the way it operates is like a welded diff as long as you only have low differential torque loading - and if one wheel is lightly loaded, that is always the case. On the dirt and tarmac motorkhanas i have used it at it was pretty good. If you get your turns right and your application of throttle, you can use it pretty well. Less chance of breaking gears than a welded one too. cheers michael |
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| Author: | TheMiniMan [ Mon Jan 23, 2012 3:51 pm ] |
| Post subject: | |
yes i also have a Freddy diff in my hillclimb Buggy,
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