Go Back   Club Lexus Forums > Lexus Model Forums > IS Models > IS - Third Generation > Suspension and Brakes
Sign in using an external account
Register Forgot Password?

RS*R Super Downs Installed (tons of info)

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 04-01-14, 06:47 AM   #1
jaznraz
Driver
Trader Score: (0)
 
jaznraz's Avatar
 
Join Date: Nov 2013
Location: Indy
Posts: 155
Default RS*R Super Downs Installed (tons of info)

I installed Super Down springs on my RWD 350 F-sport last weekend and wanted to share some thoughts, information, and pictures.

The drop - measured from the floor to the fender:
front left = 24.68 (2.13 drop)
front right = 24.75 (2.18 drop)
rear left = 24.56 (1.75 drop)
right rear = 24.68 (1.75 drop)

Suspension travel - I took the springs out of the car and raised the suspension to check the max suspension travel. This is the point where the bump stops are fully compressed far enough to raise the car. After taking a few measurements, the front suspension has .75 travel from static height to max suspension travel and the rear has 1.25. Keep in mind, this is not to the point where the bump stops hit, but to the point where the bump stops are fully compressed. BTW - the bump stops are on the shock assembly. RSR does not recommend cutting the bump stops.

When looking at the Super Down vs Down spring specs, I was shocked the SD springs had a softer rate. I called RSR and asked about this and they said the specs are correct. I commented that it didn't make sense for a shorter springs to have a softer rate, however, I believe that I understand what's going on. Due to the info listed in the previous paragraph, I'm certain that the bump stops are in full contact all the time which in turn makes them act like a spring. This would be a reason why the SD springs are softer than the down springs. I might be completely wrong, but it's my theory. I could have verified that by taking a few more measurement, but it's too late now.

Alignment
There is no camber adjustment on the front or rear of the RWD cars. I subscribed to the Toyota Tech Info System (TIS) and it's stated plain and simple. There is, however, camber adjustment in the front for the AWD cars. So, all I had to do was check and adjust the toe which made the alignment process a lot easier. My rear toe was in spec after the drop (shocker), but the front needed to be adjusted.

front camber = 1.7 and 1.7
rear camber = 2.4 and 2.6
I don't like the rear camber but the only way to fix it is to raise the car.....that sucks!

My thoughts:
The drop looks absolutely bad a$$!!!! The ride isn't too harsh, but I'm not going to say more about that until I've put more miles on the car. I don't like the scenario of riding on the bump stops (if that is the case), and I don't like the rear camber.

My setup:
Stance SC-6 wheels with Conti DW tires
235/35/19 on 8.5+35 wheels
265/30/19 on 9.5+40 wheels
Here is some info about tire sizes I posted yesterday. http://www.clublexus.com/forums/is-t...wered-3is.html

Last but not least:
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!

Last edited by jaznraz; 04-01-14 at 07:09 AM..
jaznraz is offline   Reply With Quote
Old 04-01-14, 07:07 AM   #2
sternb818
Pole Position
Trader Score: (0)
 
sternb818's Avatar
 
Join Date: Sep 2013
Location: South Florida
Posts: 380
Brendan Stern Mr_CV5 The Fremster Mr_CV5
Default

Looks great! I just ordered my springs yesterday and can't wait to get them installed! I had to get the down springs because i am going to be running 20" wheels and I don't want to modify my fenders to prevent rubbing
sternb818 is online now   Reply With Quote
Old 04-01-14, 09:53 AM   #3
bruteshot2
Driver
Trader Score: (0)
 
bruteshot2's Avatar
 
Join Date: Jul 2013
Location: CA
Posts: 191
jcco350
Default

Nice drop and wheels jaznraz!
__________________
2014 IS 350 F-Sport Obsidian/Black │Navigation │Mark Levinson │BSM

Vossen CV5 │ RS*R Down Springs │ 3M Satin Black vinyl over chrome │ GReddy Intake │Lexus Black Pearl Emblems │ 35% 3M Color Stable Window Tint │ CQuartz Finest


bruteshot2 is offline   Reply With Quote
Old 04-01-14, 05:18 PM   #4
crazych42
Driver
Trader Score: (0)
 
Join Date: Oct 2013
Location: VA
Posts: 179
Default

Looks good! I really like those wheels!
__________________
2014 Lexus IS350 F-Sport Ultra White, Roja Red, ML, BSM, PCS, RC, VGRS, RSR Half Downs
crazych42 is offline   Reply With Quote
Old 04-01-14, 06:27 PM   #5
FyaIS350
Rookie
Trader Score: (0)
 
Join Date: Oct 2013
Location: new york
Posts: 83
NYR3530
Default

any rubbing issues with that tire and wheel set-up??
FyaIS350 is offline   Reply With Quote
Old 04-02-14, 04:12 AM   #6
jaznraz
Driver
Trader Score: (0)
 
jaznraz's Avatar
 
Join Date: Nov 2013
Location: Indy
Posts: 155
Default

Quote:
Originally Posted by FyaIS350 View Post
any rubbing issues with that tire and wheel set-up??
No rubbing in the rear even at full suspension travel - the tires will not hit the fenders. The front tire just barely rubs the fender liner at full suspension travel. Here is a post that talks more in depth about that. http://www.clublexus.com/forums/is-t...wered-3is.html

During actual driving, I've only noticed the front rubbing when pulling out of my driveway. Since my driveway is sort of steep, I have to position the car at an angle to keep the front end from dragging and when doing this, it compresses the suspension heavily on one corner and causes the slightest rub.
jaznraz is offline   Reply With Quote
Old 04-02-14, 10:01 AM   #7
viNz86
Rookie
Trader Score: (0)
 
viNz86's Avatar
 
Join Date: Nov 2013
Location: BC
Posts: 71
Default

That is badass! thank you for sharing the information...can''t wait to install mine!
viNz86 is offline   Reply With Quote
Old 04-02-14, 05:49 PM   #8
FyaIS350
Rookie
Trader Score: (0)
 
Join Date: Oct 2013
Location: new york
Posts: 83
NYR3530
Default

Quote:
Originally Posted by jaznraz View Post
No rubbing in the rear even at full suspension travel - the tires will not hit the fenders. The front tire just barely rubs the fender liner at full suspension travel. Here is a post that talks more in depth about that. http://www.clublexus.com/forums/is-t...wered-3is.html

During actual driving, I've only noticed the front rubbing when pulling out of my driveway. Since my driveway is sort of steep, I have to position the car at an angle to keep the front end from dragging and when doing this, it compresses the suspension heavily on one corner and causes the slightest rub.
sweet! just lowered mine on the super-downs also...love em! perfect drop in my opinion! mind sharing your wheel set-up as im lookin for the proper fit and urs looks really good! LOL
FyaIS350 is offline   Reply With Quote
Old 04-02-14, 09:20 PM   #9
spotxc
Driver
Trader Score: (4)
 
spotxc's Avatar
 
Join Date: Feb 2008
Location: FL
Posts: 125
Default

Car is looking sharp bud!...I like! That drop really is perfect
__________________
2014 IS350 F-SPORT | VOSSEN | RS-R | JOE Z
Obsidian/Rioja Red
spotxc is offline   Reply With Quote
Old 04-06-14, 06:38 PM   #10
jaznraz
Driver
Trader Score: (0)
 
jaznraz's Avatar
 
Join Date: Nov 2013
Location: Indy
Posts: 155
Default

I guess that I'm rubbing more than I thought on the front. This shows where the tire has started to wear down the liner. BUMMER.
Click the image to open in full size.

I'm also not enjoying the ride. I can definitely feel that the front suspension only has .75" of travel. BUMMER. I think my days on Super Down's may be numbered.
jaznraz is offline   Reply With Quote
Old 04-07-14, 07:51 AM   #11
asapcolin
Driver School Candidate
Trader Score: (0)
 
asapcolin's Avatar
 
Join Date: Feb 2014
Location: Pennsylvania
Posts: 27
Default

Quote:
Originally Posted by jaznraz View Post
I guess that I'm rubbing more than I thought on the front. This shows where the tire has started to wear down the liner. BUMMER.
Click the image to open in full size.

I'm also not enjoying the ride. I can definitely feel that the front suspension only has .75" of travel. BUMMER. I think my days on Super Down's may be numbered.
Is the ride too stiff for you? Love the way your car looks and i was thinking about doing the super downs, but i don't want to rub too much when i eventually do some 19's... what alternative were you thinking about doing?
asapcolin is offline   Reply With Quote
Old 04-07-14, 08:19 AM   #12
jaznraz
Driver
Trader Score: (0)
 
jaznraz's Avatar
 
Join Date: Nov 2013
Location: Indy
Posts: 155
Default

I wouldn't say that the spring rates are too stiff but when you hit a large dip (or bump), the front suspension only travels .75" and then it fully compresses the bump stops which creates a solid stop. When this happens it causes the front of the car to stop moving downward and then rebound quickly which creates a "porpoise" effect. For reference, the stock suspension has nearly 3" of travel before it fully compresses the bump stops. Its not a terrible feeling, but I don't really like it.

Agreed - the drop looks great. I'm currently looking at other springs (less drop) and coilovers as an option.
jaznraz is offline   Reply With Quote
Old 04-07-14, 08:25 AM   #13
fiendskill
Rookie
Trader Score: (0)
 
Join Date: Feb 2014
Location: IL
Posts: 55
Default

Would either adding more camer or a smaller tire like 225, you think help in lessening the damage to the fender in that part?
fiendskill is offline   Reply With Quote
Old 04-07-14, 08:35 AM   #14
larry13
Lead Lap
Trader Score: (0)
 
Join Date: Dec 2013
Location: chicago
Posts: 433
Default

rsr coils... you wont regret it :-)
larry13 is offline   Reply With Quote
Old 04-07-14, 01:11 PM   #15
asapcolin
Driver School Candidate
Trader Score: (0)
 
asapcolin's Avatar
 
Join Date: Feb 2014
Location: Pennsylvania
Posts: 27
Default

thanks for the info. I prefer the drop of the super downs more than the regular downs and other springs out right now, but i want to run 19s when i eventually get some wheels. i was also wondering if possibly a 225 up front would help with the rubbing since its stretched a little more. i'm not sure if i want to pick up the rsr coilovers just because i had coilovers on my last car, and it rode super stiff, where the lexus stock rides so much better and don't want to lose the ride quality completely.
asapcolin is offline   Reply With Quote
Old 04-07-14, 01:11 PM
 
 
 
 
Reply

Tags
brakes, downs, super

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
IN FS: 19" Stance SC-6 silver wheels BNIB jaznraz Wheels and Tires Classifieds 10 07-24-14 11:50 AM
Jaz's SLM/Rioja 350 RWD jaznraz Build Threads 18 06-27-14 10:30 AM
Michelin Pilot Super Sport vs Conti DW fitment on Lowered 3IS jaznraz IS - Third Generation 7 06-05-14 04:56 PM
2011 IS 250 F-Sport, New wheels and lights tbulsara IS - Second Generation 15 06-05-14 01:09 PM
2008 ISF Engine ticking after it warms up runyonwc IS F 34 05-17-14 11:58 AM

All times are GMT -7. The time now is 12:42 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info