Holy Grail!!! IS350 OS Giken LSD inspection, clean-up, and install! PIC HEAVY
07-02-14, 06:32 AM
#46
When you finally get to open up your "Formula D" LSD, check to see how many clutch disks are included inside. If the differential housing is the same size as the one I have (I believe it is), you should be able to fit the maximum of 28 clutch disks. Typically more plates means more assured lock, better durability, and wider range of performance settings.
07-02-14, 07:23 AM
#47
Redspencer: do you have any notes from your 1.5 way OS unit? I'm trying to confirm the angle and lock timing OS uses out of the box for the ISF/is350 1.5way.
The numbers on the 2-way we have are 55/55-224-8-16S
The 2-way OS unit is an extreme drift spec or standard "Super Lock" unit with a 55/55 angle. The lock timing is 224 which is said to be set for an aggressive and snappy response.
OS comments were that the unit will basically be a spool that briefly unlocks when the gas is neutral, only very briefly though.
In speaking with the original owner/user he was kind enough to provide his impressions of the unit on both street and track. While usage was limited he indicated that he would try the 2way on daily driving before modifying it to a 1.5way. It seems most of the concern is around aggressive decel into a tight curve. Talking with Dan we made the point "most of our harsh braking and decel is done in a straight line." The lockup wouldn't really be a factor in this scenario. However, with the use of my s/c I do often come in hot to a curve with rapid decel needed. I would need to be more cautious and become familiar with the 2way or risk demise of my car into a wall. Lol
The numbers on the 2-way we have are 55/55-224-8-16S
The 2-way OS unit is an extreme drift spec or standard "Super Lock" unit with a 55/55 angle. The lock timing is 224 which is said to be set for an aggressive and snappy response.
OS comments were that the unit will basically be a spool that briefly unlocks when the gas is neutral, only very briefly though.
In speaking with the original owner/user he was kind enough to provide his impressions of the unit on both street and track. While usage was limited he indicated that he would try the 2way on daily driving before modifying it to a 1.5way. It seems most of the concern is around aggressive decel into a tight curve. Talking with Dan we made the point "most of our harsh braking and decel is done in a straight line." The lockup wouldn't really be a factor in this scenario. However, with the use of my s/c I do often come in hot to a curve with rapid decel needed. I would need to be more cautious and become familiar with the 2way or risk demise of my car into a wall. Lol
07-02-14, 09:53 AM
#48
Redspencer: do you have any notes from your 1.5 way OS unit? I'm trying to confirm the angle and lock timing OS uses out of the box for the ISF/is350 1.5way.
The numbers on the 2-way we have are 55/55-224-8-16S
The 2-way OS unit is an extreme drift spec or standard "Super Lock" unit with a 55/55 angle. The lock timing is 224 which is said to be set for an aggressive and snappy response.
OS comments were that the unit will basically be a spool that briefly unlocks when the gas is neutral, only very briefly though.
In speaking with the original owner/user he was kind enough to provide his impressions of the unit on both street and track. While usage was limited he indicated that he would try the 2way on daily driving before modifying it to a 1.5way. It seems most of the concern is around aggressive decel into a tight curve. Talking with Dan we made the point "most of our harsh braking and decel is done in a straight line." The lockup wouldn't really be a factor in this scenario. However, with the use of my s/c I do often come in hot to a curve with rapid decel needed. I would need to be more cautious and become familiar with the 2way or risk demise of my car into a wall. Lol
The numbers on the 2-way we have are 55/55-224-8-16S
The 2-way OS unit is an extreme drift spec or standard "Super Lock" unit with a 55/55 angle. The lock timing is 224 which is said to be set for an aggressive and snappy response.
OS comments were that the unit will basically be a spool that briefly unlocks when the gas is neutral, only very briefly though.
In speaking with the original owner/user he was kind enough to provide his impressions of the unit on both street and track. While usage was limited he indicated that he would try the 2way on daily driving before modifying it to a 1.5way. It seems most of the concern is around aggressive decel into a tight curve. Talking with Dan we made the point "most of our harsh braking and decel is done in a straight line." The lockup wouldn't really be a factor in this scenario. However, with the use of my s/c I do often come in hot to a curve with rapid decel needed. I would need to be more cautious and become familiar with the 2way or risk demise of my car into a wall. Lol
Yeah, Dan is correct that most of your braking will be done in a straight line prior to entering a corner. From my experience, one significant thing I've noticed with having this 1.5 way OS Giken TCD is that you have to relearn your ideal racing line when entering and exiting a corner. Compared to when I was on an open differential, I'm now able to brake late before turning into a corner and while turning, I can apply the throttle well ahead of reaching the apex point. This allow the rear outer wheel to guide me to my desired apex point and it reduces my turning radius (ala Torque Vectoring). I'm not yet certain if this is the ideal racing line for my current set-up and I still have a lot more to learn but so far it's been an interesting and eye-opening experience!
I'm not sure if the above technique would work in your case so be careful when it's time for you to finally take your maiden test drive!
Last edited by redspencer; 07-02-14 at 01:34 PM.
07-02-14, 12:57 PM
#49
^Yeah, see if by chance you can cram more plates in there. Like what was mentioned, more the merrier! 
I also agree with running it as-is before spending monies on parts to tune it that you might not want.
I love these two pics, as it gives examples of two different center split sections (two different ramp angles), it shows the tapered cone shim at the very top pic, AND shows how you can "tune" the progessiveness of the lock by arranging the plates differently :
I also agree with running it as-is before spending monies on parts to tune it that you might not want.
I love these two pics, as it gives examples of two different center split sections (two different ramp angles), it shows the tapered cone shim at the very top pic, AND shows how you can "tune" the progessiveness of the lock by arranging the plates differently :
07-03-14, 05:24 PM
#51
So I did some research about the original owner today while things were slow going into the holiday weekend. Check this out :
http://www.wreckedmagazine.com/blog/tag/drifting-lexus/
http://www.monsterarmy.com/members/c...8d6cf97d8.aspx
http://www.everythingdrift.com/blog/?p=272
http://www.sfldrifters.com/forums/th...o-lexus.31814/
http://talkdrift.com/archive/index.php/t-914.html
http://www.wreckedmagazine.com/blog/tag/drifting-lexus/
http://www.monsterarmy.com/members/c...8d6cf97d8.aspx
http://www.everythingdrift.com/blog/?p=272
http://www.sfldrifters.com/forums/th...o-lexus.31814/
http://talkdrift.com/archive/index.php/t-914.html
07-07-14, 01:02 PM
#52
OS is making it increasingly difficult to mod this outside of their dealers. I'm a bit annoyed as there's no point in buying such a scalable unit if you can't adjust it yourself....
"As of 2013, we have stopped the sales of LSD parts to the general public as stated in the previous email.
Even if the dealer were to take your order, we would not release the products if they inquire to order from us."
"As of 2013, we have stopped the sales of LSD parts to the general public as stated in the previous email.
Even if the dealer were to take your order, we would not release the products if they inquire to order from us."
07-27-14, 05:49 AM
#59
Might as well put it in Longterm parking at the airport
I gotta pull the LSD from the housing and I promise ill open it up and take pics before I send it off for reconfiguration. I'm going to request the 2way hardware be returned to me in case I ever want to convert back. If I keep the is350 it may very well become a dedicated track/road course car in the future....that would be ideal since I don't have the heart to part with it
I gotta pull the LSD from the housing and I promise ill open it up and take pics before I send it off for reconfiguration. I'm going to request the 2way hardware be returned to me in case I ever want to convert back. If I keep the is350 it may very well become a dedicated track/road course car in the future....that would be ideal since I don't have the heart to part with it