IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

USRC from ISF?

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Old 03-15-18, 08:02 AM
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ohiois350
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Default USRC from ISF?

hi guy, can anyone chime in about different in degree of the 14” ISF USRC? I want to upgrade my 07” IS 350 with the ISF, but they are come in one with 0 degrees and one with -20 degrees, which one should i get? Thanks
Old 03-15-18, 08:07 AM
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MikeFig82
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Last edited by MikeFig82; 07-26-18 at 10:32 PM.
Old 03-15-18, 01:06 PM
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ohiois350
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Thanks for the info, what is the difference between the Zero degree and -20 degrees one? Which one should i need?
Old 03-15-18, 09:07 PM
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2013FSport
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When they align the caster at the factory a car may end up with one of the three choices. In short, the difference in caster from 0 to +/-0.2 degrees is nothing. Just buy all the same. Also take note that the aftermarket world doesn't even bother with these tiny increments.
0.0 no offset is the default choice.

Make sense?
Old 03-15-18, 10:19 PM
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^^^^RRRacing does:


Lou
Old 03-16-18, 09:05 AM
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Sorry the a dump question, before i order it, i just want to make sure which one o have to order
Old 03-16-18, 09:44 AM
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ohiois350
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Originally Posted by 2013FSport
When they align the caster at the factory a car may end up with one of the three choices. In short, the difference in caster from 0 to +/-0.2 degrees is nothing. Just buy all the same. Also take note that the aftermarket world doesn't even bother with these tiny increments.
0.0 no offset is the default choice.

Make sense?
thanks for the info, is it the -.20 degrees caster is pull the wheels back towards to the rear, or move to the front? And is it important between the two? Thanks
Old 03-16-18, 09:57 AM
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just get the 0 deg. you don't need to change anything unless the car absolutely needs it (usually something catastrophic like suspension damage).

I recently upgraded my bushings to ISF on my 250. I can hardly tell the difference in stiffness but apparently they are 20% stiffer.
https://www.clublexus.com/forums/sus...a-non-isf.html
Old 03-16-18, 07:24 PM
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ohiois350
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Originally Posted by timmy0tool
just get the 0 deg. you don't need to change anything unless the car absolutely needs it (usually something catastrophic like suspension damage).

I recently upgraded my bushings to ISF on my 250. I can hardly tell the difference in stiffness but apparently they are 20% stiffer.
https://www.clublexus.com/forums/sus...a-non-isf.html
thanks, but i hit the potholes hard two time and bent the rims, and before i hit thr potholes i had 20” rim on, and the front driver side alway hit the bumper tab but not the passenger, that could be the caster was off?
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