BMW 525ix diff in 325ix?

[e30awd_twincharged]

The impreza sti does have an LSD diff in front and work pretty well, and you can spend the money you want on the car you want

The price for a LSD carrier you be around 1500$ if I machined the carrier by my own

The thread from the 600hp e30ix is really interesting, but it look like the only thread on that topic and I want to know more about reliable solution

[CrazyPrime]

How much stronger would your LSD diff be? Ballpark hp/tq rating? Do you have the equipment to machine your own carrier. I have asked him how exactly he added the extra spider gears to the diff but he has yet to get back to me, if/when he does I will post on this thread.

[nando]

Dude same here I have no idea what he just said..... ��. Nando why you selling all your 525 stuff? Wont work for a m50s50 swap, may be a stupid question but does a m50 oil pan bolt on a m20 block? I apologize in advance if I sound like a moron lol.

It will work for an M50 or S54 swap yes. that's the point. You'd have to do what Nisset did though and push it into the firewall a little bit. I just want a different motor.

no, it won't bolt to the M20 block. the 525ix diff is a lot sturdier than the E30's though.

[CrazyPrime]

Ya I'm turboing my m20 and I'm just looking for a stronger front diff. I've read alot of the 24v knowledge base but is it about swaping the m/s 50 I was just curious if it would work with the m20, now I know it wont.

[nando]

really it should be fine. Unless you are launching it at every stop light or running 700hp.

[Nisse Järnet]

You could get Nandos stuff and do a M20/M50 frankenpan to keep the M20 but use the stronger parts from E34.

[nando]

that would be a lot of work. feasible I guess, at least most of the bolt holes line up. the sump expansion opposite of the diff mounting would be problematic though.. worth it? maybe with a turbo, even 3.91s would be short with 400hp.

[e30awd_twincharged]

thanks for youre help nando, the added spider gear is really interessting. The m20/m50 oil pan to fit the 525diff is really interesting to if the ratio fit.

For the lsd carrier i do have the equipment to machined it but i dont really know the specification that it need to have and how strengh it will possibly handle.

It might be sily but, mayby swaping the internal of the 525ix in the 325ix is possible, never saw the 525ix diff

[flyboyx]

The price for a LSD carrier you be around 1500$ if I machined the carrier by my own

wow! i couldn't imagine the skills it would take to actually accomplish this. even with modern cad programs, you would have to re-engineer pretty much everything. one would need all of the tooling to make so many special cuts. the inside of a larger diff would have to be designed and rebuilt to accommodate the inner portion of the axle. the driver's side axle would probably have to be shortened creating torque steer. all of the tolerances would have to be perfect. you would have to choose the right material to start with. there would be so many aspects to this that i couldn't even begin to think of them all....i just don't think this is possible. if i were you, i would probably concentrate my resources elsewhere.

For the lsd carrier i do have the equipment to machined it but i dont really know the specification that it need to have and how strengh it will possibly handle.

It might be sily but, mayby swaping the internal of the 525ix in the 325ix is possible, never saw the 525ix diff

this is not possible either. the internals of the 5er are much larger than the e30's. they wouldn't even come close to fitting in the case. all of this stuff has actually already been discussed previously.

of course we want you to be successful in your endeavors. the truth is, that if you want to throw a bunch of power at an m20 ix, you really need to buy yourself several front diffs so you can replace them every few months. there really is no other viable option. maybe....just maybe.....adding two more spider gears internally would help some.

[CrazyPrime]

Mw255 over that e30 tech added the 2 extra spider gears and his diff has lasted with 700hp I believe is what he was at, at one point if I could just figure out how to add the spider gears I would be happy with that. I just don know how exactly he did it, anybody here have a idea?

[e30awd_twincharged]

You are probably right flyboyx, I studied in engeneering and I learn a lot of things about gearing design and manifacturing. However, I have absolutly no experience with car differential. I didnt know that it will have to redesign every thing, some compagny like giken just sell the limited slip differentiel unit. I though that it was possible to do the same thing for the 325ix, but by modified an existing lsd or visco carrier to be add into th front 325ix diff. Of course its a big project but it will also resolve the problem of the weak spider gear at the same time. It could be a really interresting project.

Sorry for my english am french

[nando]

it would be easier to modify the oil pan to use a larger stock front diff (525ix, E46, E53, etc). But you will have to use custom or modified half shafts, because the E30's are smaller in diameter. This also means it will all weigh more.

I remain unconvinced that a front LSD is necessary..

[Kershaw]

I remain unconvinced that a front diff is necessary.

:p

[e30awd_twincharged]

LSD will give the car more traction in mud/snow and more grip for un lauch control on tarmac, every rally car have one in front, there's a reason

Modify the oil pan is a really big job for many reason, first you will probably have to moove you strainer and theres not a lot of space. The diff you have to be mount and align PERFECTLY otherwise you will have axle and drivershaft failure. You can't do this job with a really precise machine (like CNC miling) cause its a special form. The diff have to be align when de engine are in place, thats mean de subframe in place so no space to work propely.

Dont forget that you will need to have custom front driveshaft ans custom axle.

REALLY BIG JOB

If you want just un strong open diff, seriously add two spider gear like the 600hp car have might be the easiest solution.

[flyboyx]

i think chris's point is that it would be 20x simpler to modify the pan rather than make a new dif.