A mate of mine got the diff in his twelve hundred welded up like locked so each wheel doesnt turn individualy (u no wat i mean). I was wondering wat the advantages and disadvantages are of this are.

Adavantage: Price. It is cheaper to weld one up than find, buy, and fit a limited slip.
Disadvantage: Tire wear. With NO differential action, the inner tire is going to have to spin faster than road speed to keep up with the outer tire, or the outer tire will have to scrub along slower than road speed to keep down with the inner tire.

I have run a welded diff in the Chickenhawk for years with no problems.

"Keep down?" Is that even a proper phrase?

Advantage: price and traction.
Disadvantages: understeer in tight corners which results in you having to chuck the car into corners or boot the back end around under power (both are fun but not terrible fast)
If you Rally the car or drive it on dirt the Las Vegas locker , as we call it , works fine.
If you're roadracing or Auto-X the car I would try and find a Limited Slip. When I first started Roadracing my 1200 it had the open Diff , the track we ran here in Vegas had mostly fast corners so it was fine.

Tom Grossmann , Las Vegas NV

A locker is good for traction i.e. no more single spinner take offs. For street use they are a pain in the arse to park, also plough understeer at low speed. Although for you being from adelaide the are ideal for drifting and doing "ringies"(adelaide speak) or Heli's as everyone else calls them. Plus it is easy and cheap to do. As for tyre wear it is true as the inside tyre does get dragged, but the majority of tyre wear is brought about by the number of heli's done

plenty of circuit race cars over here use lockers. With good race rubber and good suspension geometry the understeer tendancies induced by the locked centre can be completely eliminated. Those settings are not really practical for the street though.

But then again, lockers aren't really practical either, as others have said. Ok if you just drive it weekends, but if it is your daily transport, think twice before doing it. You will have trouble with axles and centres in a street car, especially if you ever put any weight in the car (like passengers). U-turns, parking etc will put huge stresses on the axles.

the diff will hop around in low speed, tight corners, tyres will squeal and attract unwanted attention, and it will probably catch you out in the wet - which will be at least embarrasing, and probably costly. Plus it's illegal in Qld, and I suspect in most other parts of Aus.

anyway, go for a ride with him, and see for yourself.

here ya fellas
dis be what i got had it a while now its pretty good, not same as lsd but heaps better traction than single spinner especially on dirt

this is from an old post:

it didnt like youre email address so ill chuck it here as some other people might be iterested aswell

g'day paul,

the story with the diff is two plates are fitted in with springs applying equal pressure on either side, proving a break away pressue of appox 50 psi (lsd is about 75-85psi i think and standard open diffs are about 20-25 psi) so its a midway thing, but it only costs $250 to get fitted and has proven to last 3
rally seasons quite regularly, when it does die the diff acts open centre and costs $100 or $150 to make like brand new again, the guy that did it for me takes youre diff centre for approx. 10 days so you need
alternate for mean time. the only restrictions as far as the car goes is that it will fit all diffs except 2 he found he could do so far (i think charade and some other small thing) so h190 is no prob and other restriction is the car has to have less than 200hp (at
wheels i think it is) so it can deffinetly be done to youre diff. apparently there are a few guys around doing this conversion but the guy that did it for me is called "Tayell Automotive" in East Bentleigh Melbourne Ph: (03) 9579-5529 and John is the blokes
name

as far as driving charachteristics it basically acts like an LSD, as in both wheels will put power to the ground but when turning the outside wheel will be allowed to spin faster and not harm turning or scrub tyres, also im told it will not push you through a corner anything like a locked diff does when youre
going hard, though it will a little

this is all what ive deen told as ive had the
conversion done but havent got the h165 diff in my car as i got my diff last night and am feeling a little seedy today and its raining so i aint touching the car

youre car would go pretty nice with that a-15 with 170hp specially with a sprung load, do some mean doughies and launch pretty good too. unfortunatly the underside of my car would cop a fair belting if i dropped the suspension but yeah it would
look pretty mean

anyway good luck
see ya round,
Michael