Hey All. Long time no post: I'm starting a new law practice and time slipped away. That said, I was wondering how functional a limited slip differential (LSD) would be on a new VMC speeedster with Greg's stock 2332 and a 4-speed, 3.44 transmission? I like acceleration as much as the next guy, but I'm not sure if I'll really feel the difference with an LSD without going to the track.
As always, any thoughts or insights would be very much appreciated.
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If you get LSD you should consider installation of other components to get the full use of the LSD.
Such as "Kafer" bars, a front transmission mount limiting device and a rear engine motor mount. These will eliminate the brutal wheel hop action of the entire drivetrain on acceleration..........Bruce
But to answer your question of “how functional a limited slip differential (LSD) would be on a new VMC speeedster with Greg's stock 2332 and a 4-speed, 3.44 transmission?”
You might notice a difference on a track corner at 10/10’ths, or on a wet, slick road in the mountains, or in slippery snow. All that pertains to a true IRS rear suspension, NOT Swing arm.
Would you notice a difference in straight line acceleration? No.
Would you ever notice it around town or on a freeway? No.
I have an LSD in my Spyder 3.88 4 speed. I’ve owned 2 other spyders without LSDs. I drive very hard (some of you might argue that point) and I can definitely feel the difference. Hang the rear end of the car out without an LSD and the outside tire just spins while the inside tire stays planted. Lots of fun but not real fast. With my LSD the car is faster and better planted. But reaching the level of tire adhesion is scarier. When you reach that level the rear is gone. I’m driving in a mid engine Spyder with swing axle so an IRS rear engine speedster would be quite different.
I didn’t think they made an LSD for a 3.44 R&P. But I could be wrong.
In the next year, I hope, I’m building a speedster with a 2.65L type 4. Going 3.44 4 speed with no LSD.
Great point Gordon. I should have mentioned that the car has IRS.
I'd be curious to learn whether any kind of LSD is available with a 3.44 R&P.
And if the 3.44 R&P is even available.
Not long ago 3.44s were reportedly n/a.
Please let us know.
I have a swing axle Spyder with a 3.44 final drive. I have a Super diff, which is just a stronger version of an open diff.
Anyone on here will attest to the aggressive nature of my driving. I've never needed a LSD or Torsen diff. I drive the wheels off of it. I'm never lacking for traction.
What is important? Tires. Sticky tires make a LSD unnecessary. Phil, you need better tires than those hard ones you have.
I'm sure IRS is even better than a swing axle.
Gordon has certainly got it right.
Greg is certainly getting his 3.44 finals from somewhere, almost all his cars have them now.
The word I got was either no or maybe on LSD/Torsen with a 3.44. I know of none that are installed.
All I know Danny I saw you do a 100 foot burn out in your Spyder and I saw 2 tire marks, not one. If I did that in one of my old spyders I’d see only 1 tire mark. I know your tranny doesn’t have an LSD but it sure acts like it does.
Yeah there is spirited driving, aggressive driving then Piperato driving 
. Your car really goes Danny.
@550 Phil posted:All I know Danny I saw you do a 100 foot burn out in your Spyder and I saw 2 tire marks, not one. If I did that in one of my old spyders I’d see only 1 tire mark. I know your tranny doesn’t have an LSD but it sure acts like it does.
Not possible.
That would be hooning on a public roadway, and we wring our hands at such things.
Think of the children!
I have a difficult time believing that Daniel would perform such a burnout. He is anti-hooning.
WHERE IS THE VIDEO!!!
Ummm,no.
@Panhandle Bob posted:I have a difficult time believing that Daniel would perform such a burnout. He is anti-hooning.
Hoonigan just kidding of course.
@550 Phil posted:All I know Danny I saw you do a 100 foot burn out in your Spyder and I saw 2 tire marks, not one. If I did that in one of my old spyders I’d see only 1 tire mark. I know your tranny doesn’t have an LSD but it sure acts like it does.
If you shim the side gear tighter in a swing axle transmission, this creates a mini posi. Gene Berg developed a kit to do this back in 1961. It’s called the Poor Man’s Posi. Note, this is for swingaxle only.
@Stan Galat posted:Not possible.
That would be hooning on a public roadway, and we wring our hands at such things.
Think of the children!
In the Carlisle parking lot. Just a few drunk car enthusiasts staggering around.
@LI-Rick posted:If you shim the side gear tighter in a swing axle transmission, this creates a mini posi. Gene Berg developed a kit to do this back in 1961. It’s called the Poor Man’s Posi. Note, this is for swingaxle only.
I bought Weddle's side gear shim kit. I kept the side gear clearance tight(to whatever the Bentley minimum is). I have heard that the Berg kit is great for the drag strip but not so good for road cars.
Very cool all the same.
@DannyP posted:I bought Weddle's side gear shim kit. I kept the side gear clearance tight(to whatever the Bentley minimum is). I have heard that the Berg kit is great for the drag strip but not so good for road cars.
Danny, I think what happens with the Berg kit is relatively rapid wear and then it looses the posi effect.
