Retrofitting Mechanical Limited Slip Differential (LSD) 08-09 ISF
#47
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Ill wait for the Torsen one hehe. TOMs Malaysia told me that they MAY know some guys in Japan who can reflash the ECU to get it to work. We just need to wait for it to become available.
Lots of IFs, MAYS and BUTS.. but there is hope
Lots of IFs, MAYS and BUTS.. but there is hope
#48
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Wanna hear some good news? TOMs Malaysia Spoke to TOMs Japan and they said that installing LSD on the IS F poses no problem at all. this is the Toms 1 way Mech LSD. The rationale is this, the Electronic LSD system on the IS F, kicks in much later than what it leads on to be.
Now we have to wait for the original Torsen version as TOMs did say that their LSD is "a little rough". I think this looks good for us folks Once the parts become available, ill be in line to do it. I just cant wait. Like i said before in first post. This will even things up a bit with m3 handling.
oh and a little more precision on steering too but no one can deny that IS Fs can drift.
Now we have to wait for the original Torsen version as TOMs did say that their LSD is "a little rough". I think this looks good for us folks Once the parts become available, ill be in line to do it. I just cant wait. Like i said before in first post. This will even things up a bit with m3 handling.
oh and a little more precision on steering too but no one can deny that IS Fs can drift.
#51
Wanna hear some good news? TOMs Malaysia Spoke to TOMs Japan and they said that installing LSD on the IS F poses no problem at all. this is the Toms 1 way Mech LSD. The rationale is this, the Electronic LSD system on the IS F, kicks in much later than what it leads on to be.
Now we have to wait for the original Torsen version as TOMs did say that their LSD is "a little rough". I think this looks good for us folks Once the parts become available, ill be in line to do it. I just cant wait. Like i said before in first post. This will even things up a bit with m3 handling.
oh and a little more precision on steering too but no one can deny that IS Fs can drift.
Now we have to wait for the original Torsen version as TOMs did say that their LSD is "a little rough". I think this looks good for us folks Once the parts become available, ill be in line to do it. I just cant wait. Like i said before in first post. This will even things up a bit with m3 handling.
oh and a little more precision on steering too but no one can deny that IS Fs can drift.
-Kevin
#53
I honestly don't think the time, money and effort put into retrofitting the mechanical LSD into the previous IS F would be worth it unless you're going to be tracking this beast to all hell and back. A true mechanical LSD does not have a logical place in a majority of real world applications, even if these is some excitement to be had on public roads.
Now, should I go to a track (I still have to but if I really wanted to I would have a got a two-seater), in sport mode, is the VDIM supposed to act more aggressively, emulating better a true LSD?
The fact that Lexus is putting a LSD in the 2010 model makes me wonder if the VDIM does indeed perform as good as anticipated. I am puzzled why Lexus would do that for track driving, or very few of its F customers. This car really has a major problem, experienced by a large percentage of the customers, which is its suspension, and Lexus could have solved that in the 10 model instead of putting a real LSD. Further, a better suspension may reduce the need of a real LSD (after all the wheels are supposed to stay on the tarmac under all circumstances, aren't they)?
Thanks for your feedback.
#54
its not all about the wheel in the air. the LSD steers the car in hard turns. being able to plant the power to BOTH wheels and point the car in the direction you want in a hard turn makes things alot easier. FYI...
#55
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Yes, the suspension is one issue, because we do not have have a suspension which is adjustable like the m3 so the inclusion of a mechanical LSD would definitely make this better. I think Lexus did not want to make the IS F too different from the IS 250s/350s. Just my 2 cents.
But mech LSD works a lot better than electronic LSD, also because of feel and making the steering a little more precise. But you are right if anything is going to make the most difference its the suspension. An adjustable one.
But mech LSD works a lot better than electronic LSD, also because of feel and making the steering a little more precise. But you are right if anything is going to make the most difference its the suspension. An adjustable one.
#58
However I am puzzled that VDIM which, as opposed to a LSD, also knows about the steering input, speed, etc, would not be capable to emulate pretty well what a LSD can do.
I suppose track times at the Nurburgrin with a 2009 and a 2010 ISF will tell the story and it better be much better with the 2010 otherwise I would not understand why Lexus chose that option for the 2010 model. For my parts, I suppose it would not get me home any faster during my daily commute...
#59
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That seems to make sense indeed.
However I am puzzled that VDIM which, as opposed to a LSD, also knows about the steering input, speed, etc, would not be capable to emulate pretty well what a LSD can do.
I suppose track times at the Nurburgrin with a 2009 and a 2010 ISF will tell the story and it better be much better with the 2010 otherwise I would not understand why Lexus chose that option for the 2010 model. For my parts, I suppose it would not get me home any faster during my daily commute...
However I am puzzled that VDIM which, as opposed to a LSD, also knows about the steering input, speed, etc, would not be capable to emulate pretty well what a LSD can do.
I suppose track times at the Nurburgrin with a 2009 and a 2010 ISF will tell the story and it better be much better with the 2010 otherwise I would not understand why Lexus chose that option for the 2010 model. For my parts, I suppose it would not get me home any faster during my daily commute...
#60
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I wonder if able to retrofit the LSD how would it affect warranty? Would there still be warranty if not installed by Lexus? Also anything dealing with ECU reflash or upgrade usually voids warranty.
Last edited by ISF-88; 09-20-09 at 05:37 PM.