2.93 LSD

From the tranny down to wheel bearings.
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AustinR
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2.93 LSD

Postby AustinR » Wed Aug 01, 2012 12:18 am

Anybody ever drive an e30 with one? I found one on R3V for $250. Sounds pretty straight. Worth it? I like the sound of lower highway rpm's now that that's pretty much all I use the car for these days. Plus I want to boost it in the future.
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Re: 2.93 LSD

Postby M20_fever » Wed Aug 01, 2012 1:28 am

it will be a total dog with a tired m20. MPG on the highway would go up, but it would feel like your hauling a trunk load of concrete around town.
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Re: 2.93 LSD

Postby Yoshi » Wed Aug 01, 2012 2:16 am

I have one. But I also have 500whp.
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Re: 2.93 LSD

Postby AustinR » Wed Aug 01, 2012 2:20 am

Lol. Fair enough.
Is it hard on the motor to spin 3500 rpm for hours on end? Seems like it would be.
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Re: 2.93 LSD

Postby AustinR » Wed Aug 01, 2012 2:25 am

Also, can you put lsd guts in an open diff case?
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Re: 2.93 LSD

Postby Nsquared97 » Wed Aug 01, 2012 3:36 am

AustinR wrote:Is it hard on the motor to spin 3500 rpm for hours on end? Seems like it would be.

My Justy would be at 4-4.5k for 10 hours when i had it going back and forth to Tech, seemed just fine. And that car redlined at 6k.

If you do want to get a lower ratio, look for a 3.46. Would be a pretty decent compromise IMO, but harder to find.

AustinR wrote:Also, can you put lsd guts in an open diff case?

If you can, take a wild guess at who has a boxful of LSD guts... Haha. I mainly just want one of the clutch/dog-ear plates to add to mine.
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Re: 2.93 LSD

Postby AustinR » Wed Aug 01, 2012 3:43 am

Lol. Of coarse you do.
I do think I want a bit of a taller gear. 1st just seems so useless, and I'm revving 3500 doing 80mph. Idk, maybe it's perfectly fine, but it seems high to me for some reason. Maybe it's the engine in my first car (GMC Jimmy (I blew it up)) still haunting me...
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Re: 2.93 LSD

Postby Nsquared97 » Wed Aug 01, 2012 3:51 am

Probably lol. You just need to start autoXing, you'll be wishing you had a 4.10 then haha.
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Re: 2.93 LSD

Postby M20_fever » Wed Aug 01, 2012 4:10 am

I've actually thought about going to a 3.46 gear, just never seen one for sale.
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Re: 2.93 LSD

Postby AustinR » Wed Aug 01, 2012 11:26 am

M20_fever wrote:I've actually thought about going to a 3.46 gear, just never seen one for sale.

Haha. Hey, if you ever see one let me know! :wink:
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Re: 2.93 LSD

Postby Yoshi » Wed Aug 01, 2012 11:51 am

3.46 sounds nice but I doubt it will make much of a difference in top end. Your engine is fine at those rpms for extended periods of time as long as it's maintained. Prob easier on the motor than stopping and starting from red lights/stop signs.

About the LSD into an open diff: It's physically possible. But the cost would be more than getting one that's already an LSD
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Re: 2.93 LSD

Postby Nsquared97 » Wed Aug 01, 2012 5:29 pm

Yoshi wrote:About the LSD into an open diff: It's physically possible. But the cost would be more than getting one that's already an LSD

What would it take Yoshi? I literally have everything from my old one, except the main gear at the very front of the housing (forget what it's called)
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Re: 2.93 LSD

Postby Yoshi » Wed Aug 01, 2012 5:57 pm

well. first off, the open and lsd would have to be from the same ratio. IE open 3.73 with lsd 3.73 innards. Then I think it's a direct swap. But you'd want to pat attention to pinion depth and lash. If either are off, you have to shim lash and/or redo pinion depth.

Pinion depth is done by a crush washer between the two diff bearings on its input shaft. But those bearings take special tools. Even then, I'm not sure the ring gear will mesh right with the pinion gear.
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