10J vs 10.5J
Lexus Test Driver
Joined: Feb 2017
Posts: 6,260
Likes: 1,752
From: Richmond Hill, Ontario, Canada
When comparing those specs, with regards to clearing the rear fender, they are basically the same.
The 10.5J will be just less than 2mm closer to the fender than the 10J.
I guess some other questions to ask first are: What size tire do you plan on running? How much are you lowering the car?
Edit: Just found the vehicle is on J5's with 235-35-19 & 265-30-19.
The 10.5J will be just less than 2mm closer to the fender than the 10J.
I guess some other questions to ask first are: What size tire do you plan on running? How much are you lowering the car?
Edit: Just found the vehicle is on J5's with 235-35-19 & 265-30-19.
Last edited by Sasnuke; Jan 24, 2019 at 04:32 AM.
Thread Starter
Driver
Joined: Jun 2016
Posts: 125
Likes: 40
From: Moscow
When comparing those specs, with regards to clearing the rear fender, they are basically the same.
The 10.5J will be just less than 2mm closer to the fender than the 10J.
I guess some other questions to ask first are: What size tire do you plan on running? How much are you lowering the car?
Edit: Just found the vehicle is on J5's with 235-35-19 & 265-30-19.
The 10.5J will be just less than 2mm closer to the fender than the 10J.
I guess some other questions to ask first are: What size tire do you plan on running? How much are you lowering the car?
Edit: Just found the vehicle is on J5's with 235-35-19 & 265-30-19.
Lexus Test Driver
Joined: Feb 2017
Posts: 6,260
Likes: 1,752
From: Richmond Hill, Ontario, Canada
The RCF has a heavy V8 up front, so I would think the spring rate would be a lot higher than an IS...which might make the IS front end actually higher than stock, instead of lower.
If you think about in in reverse, what if you dropped a V8 into an IS with the stock springs...would likely make the front of the vehicle sag.
I could also be completely wrong lol!!
Definitely post some pics once installed...I'm curious to see how it turns out.
Thread Starter
Driver
Joined: Jun 2016
Posts: 125
Likes: 40
From: Moscow
I guess in theory they should fit, but wasn't sure how the spring rates and dampening would work out.
The RCF has a heavy V8 up front, so I would think the spring rate would be a lot higher than an IS...which might make the IS front end actually higher than stock, instead of lower.
If you think about in in reverse, what if you dropped a V8 into an IS with the stock springs...would likely make the front of the vehicle sag.
I could also be completely wrong lol!!
Definitely post some pics once installed...I'm curious to see how it turns out.
The RCF has a heavy V8 up front, so I would think the spring rate would be a lot higher than an IS...which might make the IS front end actually higher than stock, instead of lower.
If you think about in in reverse, what if you dropped a V8 into an IS with the stock springs...would likely make the front of the vehicle sag.
I could also be completely wrong lol!!
Definitely post some pics once installed...I'm curious to see how it turns out.
My bro just installed RC F suspension on 3IS. all got on bolt on. But he did a swap - 5-liter engine.
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