LSD help!
11-02-08, 09:18 PM
#1
Lead Lap
Thread Starter
LSD help!
I tried searching but couldn't find a definite answer!
I know that the Toms Lsd is out there, but is it applicable to the USDM IS?
Would it be hard to install the TOMs LSD?
does the TOMs LSD locks the diff. and make the both rear tire spin at the same time?
Are there more brand LSDs available for the IS?
Thanks in andvance!
this site is the best!
I know that the Toms Lsd is out there, but is it applicable to the USDM IS?
Would it be hard to install the TOMs LSD?
does the TOMs LSD locks the diff. and make the both rear tire spin at the same time?
Are there more brand LSDs available for the IS?
Thanks in andvance!
this site is the best!
11-03-08, 11:25 AM
#3
Pole Position
Join Date: May 2007
Location: Arizona
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
/\ Tom's diff is a one way unit- and is very pricey, does not matter if its usdm or any other market- I have been wanting to put in a diff for a while and have not had much luck with finding anything other than the Tom's unit.
According to a post from Lobux june of last year the is250 rwd was equiped with a torsen lsd from the factory (let the salvage yard search begin!).
And also apparently the canadian sport pack is350's got one too?
According to a post from Lobux june of last year the is250 rwd was equiped with a torsen lsd from the factory (let the salvage yard search begin!).
And also apparently the canadian sport pack is350's got one too?
11-03-08, 01:05 PM
#7
Pole Position
Join Date: May 2007
Location: Arizona
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
Trending Topics
11-03-08, 03:11 PM
#10
this is from wikipedia
"If there is no additional coupling on over run, the LSD is 1 way. This is a safer LSD, as soon as the driver lifts the throttle, the LSD unlocks and behaves somewhat like a conventional open differential. This is also the best for FWD cars, as it allows the car to turn in on throttle release, instead of ploughing forward. [1]
If the LSD increases coupling in the same way regardless of whether the input torque is forwards or reverse, it is a 2 way differential. Some drifters prefer this type as the LSD behaves the same regardless of their erratic throttle input, and lets them keep the wheels spinning all the way through a corner. An inexperienced driver can easily spin the car when using a 2 way LSD if they lift the throttle suddenly, expecting the car to settle like a conventional open differential.
If the LSD behaves somewhere in between these two extremes, it is a 1.5 way differential, which is a compromise between sportiness and safety"
My Z28 is a 2way because of a special order when it was built at the factory. FYI I am running a 4.10 Auburn diff.
"If there is no additional coupling on over run, the LSD is 1 way. This is a safer LSD, as soon as the driver lifts the throttle, the LSD unlocks and behaves somewhat like a conventional open differential. This is also the best for FWD cars, as it allows the car to turn in on throttle release, instead of ploughing forward. [1]
If the LSD increases coupling in the same way regardless of whether the input torque is forwards or reverse, it is a 2 way differential. Some drifters prefer this type as the LSD behaves the same regardless of their erratic throttle input, and lets them keep the wheels spinning all the way through a corner. An inexperienced driver can easily spin the car when using a 2 way LSD if they lift the throttle suddenly, expecting the car to settle like a conventional open differential.
If the LSD behaves somewhere in between these two extremes, it is a 1.5 way differential, which is a compromise between sportiness and safety"
My Z28 is a 2way because of a special order when it was built at the factory. FYI I am running a 4.10 Auburn diff.
Last edited by slee18; 11-03-08 at 03:14 PM.
11-03-08, 04:17 PM
#11
Driver School Candidate
Join Date: Nov 2008
Location: CA
Posts: 22
Likes: 0
Received 0 Likes
on
0 Posts
11-03-08, 04:39 PM
#12
Pole Position
Join Date: May 2007
Location: Arizona
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
The part # for the optional torsen diff on the 250 is FX20TX (per Lobux).
My hope is that the addition of the torsen diff would make VDIM less intrusive since it uses brake and throttle cut to counteract differing wheel speed (wheel spin) at the rear end.
The whole point of an LSD is to put more power to the ground through both drive wheels instead of the annoying inside wheel spin exiting corners that the 350 suffers horribly from (at least mine does).
since your 350 has VDIM it might act funny in different driving situations unless you turn it off.
The whole point of an LSD is to put more power to the ground through both drive wheels instead of the annoying inside wheel spin exiting corners that the 350 suffers horribly from (at least mine does).
11-03-08, 04:46 PM
#13
The part # for the optional torsen diff on the 250 is FX20TX (per Lobux).
My hope is that the addition of the torsen diff would make VDIM less intrusive since it uses brake and throttle cut to counteract differing wheel speed (wheel spin) at the rear end.
The whole point of an LSD is to put more power to the ground through both drive wheels instead of the annoying inside wheel spin exiting corners that the 350 suffers horribly from (at least mine does).
My hope is that the addition of the torsen diff would make VDIM less intrusive since it uses brake and throttle cut to counteract differing wheel speed (wheel spin) at the rear end.
The whole point of an LSD is to put more power to the ground through both drive wheels instead of the annoying inside wheel spin exiting corners that the 350 suffers horribly from (at least mine does).
here lies the other problem Giggity, the VDIM also detects the front wheel speed to slow the vehicle to maintain control. If it slows the speed of the rear wheels to match the front wheels
. Which now defeats the purpose of a limited slip unless you have the VDIM turned off 
. The VDIM would have to be less obtrusive like the the IS-F
or the M3 
to take full advantage of this LSD. I think the IS-F might cut in before the M3. Dont quote me on that!
11-03-08, 05:30 PM
#14
Pole Position
Join Date: May 2007
Location: Arizona
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
look at post 15 https://www.clublexus.com/forums/sho...d.php?t=365496
Guess I'm back to saving up for the Tom's diff.
Thanks for sticking the proverbeal fork in my easy LSD solution slee18!
Thread
Thread Starter
Forum
Replies
Last Post