IS F (2008-2014) Discussion topics related to the IS F model

LSD 2010+ Wow!

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Old 08-14-12, 10:09 AM
  #16  
streetx
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im debating for my 60k to either put in the os giken or buy the whole factory unit and just bolt in and go
Old 08-14-12, 10:32 AM
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MisterSkiz
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Originally Posted by streetx
im debating for my 60k to either put in the os giken or buy the whole factory unit and just bolt in and go
I looked into having the factory pumpkin from 10+ models installed.

Without labor, the pumpking and misc parts (bolts, etc) was around 4-5k.

Also remember the difference between the two. The Factory unit is a Torsen differential that is a gear type, the OS Gikken is a clutch pack type. The clutch pack type can be finicky as it sometimes needs a certain amount of "friction modifier" added to the gear oil to make sure the clutches behave as they should.

I think your best bet is wait for someone to crash their 10+ model and buy the pumpkin from a junkyard :P
Old 08-19-12, 01:17 AM
  #18  
oztiks
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Originally Posted by Just F Me
How many of you drive your IS F hard enough to truly feel the benefits of the LSD? Probably not many of you...all this talk about performance this performance that...most of us hasn't even taken your car to a drag strip, track or autocross. I bet less than 5% of us have.
I can attest to it on a daily basis. I went from an '08 -F (no LSD), awful, sloppy rear-handling, to a (few cars), to a '10 and the handling when coming out of a corner under heavy throttle is completely different, as it should be. The only annoying thing about the differential is making u-turn's
Old 08-19-12, 07:19 AM
  #19  
IS350atWOT
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Originally Posted by oztiks
I can attest to it on a daily basis. I went from an '08 -F (no LSD), awful, sloppy rear-handling, to a (few cars), to a '10 and the handling when coming out of a corner under heavy throttle is completely different, as it should be. The only annoying thing about the differential is making u-turn's
Because of the sharp turn that a u-turn us, doesn't the limited slip still just turn one rear wheel?
Old 08-19-12, 07:48 AM
  #20  
lexsane
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Originally Posted by Juanca
^^^ I have and I can tell you that the difference between pre-LSD and LSD is measurable in the 1/8 mile (the only track I have in my area). I don't care about my times, this track sucks big time, but at least it helps me measuring mods (kind of a cheap dyno session). I've had way better times at PBIR (old Moroso) but I don't go there often.

These are some numbers that I remember from my visits to the local track:

2013 FORD MUSTANG BOSS 302
8.5s @ 86 mph

2010 NISSAN GT-R
7.9s @ ???

2010 CORVETTE Z06
8.1s @ ???

2008 LEXUS ISF stock (mine)
8.5s @ 86 mph

2008 LEXUS ISF w/ JoeZ intake, muffler/cat delete, MHP "tune" (mine)
8.3s @ 89 mph

2012 LEXUS ISF stock (mine)
8.7s @ 84 mph

2012 LEXUS ISF w/ ISS Forged DES, PPE header, JoeZ intake (mine)
8.5s @ 86 mph

I thought I should be quicker than my previous ISF but no, it's not happening yet. I'm still wondering about the intake, I think my car needs more air, besides this has been a cruel summer and that may be affecting my 2012 times. Outside a drag strip the 2010-2012 ISF should be faster than the previous years.
So your stock 08 was almost the same time as your 12 with those bolt ons..
you think weather was that big of a factor?
Old 08-19-12, 07:53 PM
  #21  
Juanca
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^^^ Weather has to be a factor, I don't know how much this extreme Miami hot weather is affecting my times though. I'll post more times around October/November, hopefully numbers will improve.
Old 11-13-12, 04:20 AM
  #22  
darbs242
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So the 2010 and 2011 have a true LSD correct? I found a used 2010 diff for 950....
Old 11-13-12, 05:02 AM
  #23  
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^^ Correct.... $950 sounds like a deal.
Old 11-13-12, 07:05 AM
  #24  
mercurymet
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Originally Posted by darbs242
So the 2010 and 2011 have a true LSD correct? I found a used 2010 diff for 950....
where did you find it? I've looked around, they seem hard to find.

People have told me that one of my rear wheels spins when launching for the quarter mile. Don't know if that happens when the fluid overheats or is a more regular occurrence without a real LSD.

The rear definitely feels artificial around tight turns (jerky slip and grip) ? e-lsd effect.
Old 11-13-12, 08:50 AM
  #25  
Gearbangin
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Originally Posted by Just F Me
How many of you drive your IS F hard enough to truly feel the benefits of the LSD? Probably not many of you...all this talk about performance this performance that...most of us hasn't even taken your car to a drag strip, track or autocross. I bet less than 5% of us have.
This. lol
Old 11-13-12, 10:55 AM
  #26  
MisterSkiz
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Originally Posted by darbs242
So the 2010 and 2011 have a true LSD correct? I found a used 2010 diff for 950....
Haha. You are gonna hate me.

If this is the one at Standard Auto Wreckers in NY/Ontario I just bought it..it was the last one
Old 11-13-12, 07:44 PM
  #27  
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Originally Posted by MisterSkiz
Haha. You are gonna hate me.

If this is the one at Standard Auto Wreckers in NY/Ontario I just bought it..it was the last one
I dont hate you but yes that was it, more will get smashed as time goes on... or il cough up the os giken
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