ClubLexus - Lexus Forum Discussion

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

sage RCA blocks-20mm

Thread Tools
 
Search this Thread
 
Old 03-29-16, 10:21 AM
  #1  
mindcrime
Lead Lap
Thread Starter
iTrader: (2)
 
mindcrime's Avatar
 
Join Date: Sep 2014
Location: ca
Posts: 556
Likes: 0
Received 7 Likes on 7 Posts
Default sage RCA blocks-20mm
ok, so as an alternative to running coil overs or lowering springs, will installing rca 20mm blocks be a good idea to use on the IS F? I know guys with GS/ISx run them, but haven't seen any threads(haven't searched) on the IS F using blocks.
mindcrime is offline  
Reply Like
Old 03-29-16, 11:57 AM
  #2  
tas02
Lexus Test Driver
iTrader: (2)
 
tas02's Avatar
 
Join Date: Jul 2015
Location: WA
Posts: 1,063
Received 31 Likes on 29 Posts
Default
You'd only want to use RCAs along with lowering springs or coilovers, not as an alternative.
tas02 is offline  
Reply Like
Old 03-29-16, 12:14 PM
  #3  
BluStreak1
Driver
iTrader: (4)
 
BluStreak1's Avatar
 
Join Date: Jun 2014
Location: HI
Posts: 102
Likes: 0
Received 2 Likes on 2 Posts
Default
I've been using 20mm LCA blocks since I got my ISF 3 years ago. No problems to report.
BluStreak1 is offline  
Reply Like
Old 03-29-16, 12:20 PM
  #4  
mindcrime
Lead Lap
Thread Starter
iTrader: (2)
 
mindcrime's Avatar
 
Join Date: Sep 2014
Location: ca
Posts: 556
Likes: 0
Received 7 Likes on 7 Posts
Default
Originally Posted by tas02
You'd only want to use RCAs along with lowering springs or coilovers, not as an alternative.
why not as an alternative?
mindcrime is offline  
Reply Like
Old 03-29-16, 12:21 PM
  #5  
mindcrime
Lead Lap
Thread Starter
iTrader: (2)
 
mindcrime's Avatar
 
Join Date: Sep 2014
Location: ca
Posts: 556
Likes: 0
Received 7 Likes on 7 Posts
Default
Originally Posted by BluStreak1
I've been using 20mm LCA blocks since I got my ISF 3 years ago. No problems to report.
fronts only? are you on stock suspension? any pictures of the drop in front?
mindcrime is offline  
Reply Like
Old 03-29-16, 02:09 PM
  #6  
BluStreak1
Driver
iTrader: (4)
 
BluStreak1's Avatar
 
Join Date: Jun 2014
Location: HI
Posts: 102
Likes: 0
Received 2 Likes on 2 Posts
Default





Just the fronts...On stock suspension.
BluStreak1 is offline  
Reply Like
Old 03-29-16, 03:21 PM
  #7  
mindcrime
Lead Lap
Thread Starter
iTrader: (2)
 
mindcrime's Avatar
 
Join Date: Sep 2014
Location: ca
Posts: 556
Likes: 0
Received 7 Likes on 7 Posts
Default
thanks BS1. looks good. one thing I noticed after driving the F on Tein springs is, the roads here in SoCal are worse than I remember. I can live with stock suspension and the RCA blocks for a while.
mindcrime is offline  
Reply Like

Trending Topics

Old 03-29-16, 10:12 PM
  #8  
FIGS
The Maker
iTrader: (11)
 
FIGS's Avatar
 
Join Date: May 2009
Location: CO
Posts: 2,292
Received 144 Likes on 73 Posts
Default
Note how far back it pushes the front wheel due to the fact the knuckle is angled. The loss is caster is not a desirable thing and will reduce the steering response. Just FFT.
Mike.
__________________
Redefining Lexus Aftermarket Parts Since 2001
-- We are your Lexus suspension experts--
BCR - KW - PENSKE - OHLINS - HKS - GREDDY - STANCEPARTS
Links - Arms - SuperPro Poly Bushings - Solid Bearing Conversions - Motor Mounts
RB BBK's and 2P Rotors, G-Loc pads, Radium Fuel Systems
Custom Fabrication Design and Machining - Industrial 3D Printing - Laser Cutting
2018 USTCC Sportsman Class Champions - 2018 NASA ST5 National Champions
FIGS is offline  
Reply Like
Old 03-29-16, 10:27 PM
  #9  
BluStreak1
Driver
iTrader: (4)
 
BluStreak1's Avatar
 
Join Date: Jun 2014
Location: HI
Posts: 102
Likes: 0
Received 2 Likes on 2 Posts
Default
I have had no steering issues what so ever...I also have my car aligned twice a year due to the terrible roads we have here on Oahu and the camber and caster settings are as close to oem as possible.
BluStreak1 is offline  
Reply Like
Old 03-29-16, 10:51 PM
  #10  
tas02
Lexus Test Driver
iTrader: (2)
 
tas02's Avatar
 
Join Date: Jul 2015
Location: WA
Posts: 1,063
Received 31 Likes on 29 Posts
Default
Why would one adjust the roll center on a vehicle that's not lowered?
What is the purpose?
Why would one ever want to reduce caster in our cars?

Does this have something to do with "stance"??
tas02 is offline  
Reply Like
Old 03-29-16, 11:10 PM
  #11  
BluStreak1
Driver
iTrader: (4)
 
BluStreak1's Avatar
 
Join Date: Jun 2014
Location: HI
Posts: 102
Likes: 0
Received 2 Likes on 2 Posts
Default
Yup...even out the "gap" between the front and rear wheels. Like I said...I have not had any issues with steering or anything. The car is a daily driver...there isn't even a track of any kind here.
BluStreak1 is offline  
Reply Like
Old 03-30-16, 08:59 AM
  #12  
mindcrime
Lead Lap
Thread Starter
iTrader: (2)
 
mindcrime's Avatar
 
Join Date: Sep 2014
Location: ca
Posts: 556
Likes: 0
Received 7 Likes on 7 Posts
Default
I don't see it. wouldn't this be the same issue with lowering springs? my car lowered on Tein springs, stock shocks.



mindcrime is offline  
Reply Like
Old 03-30-16, 11:05 AM
  #13  
WylieKylie
Lead Lap
iTrader: (2)
 
WylieKylie's Avatar
 
Join Date: May 2013
Location: UT
Posts: 624
Received 29 Likes on 26 Posts
Default
Originally Posted by tas02
Why would one adjust the roll center on a vehicle that's not lowered?
What is the purpose?
Why would one ever want to reduce caster in our cars?

Does this have something to do with "stance"??
Regardless if the car is lowered or not moving or adjusting the roll center can make a difference in handling. It definitely can become much more important on a lowered car.

But... I don't think anyone outside of Toyota knows where the roll center is in relation to the COG, so adjusting the roll center closer to the COG is at best an educated guess. Someday I'd like to map out the suspension pivots and make that educated guess, but today is definitely not someday!
WylieKylie is offline  
Reply Like
Old 03-30-16, 12:04 PM
  #14  
mindcrime
Lead Lap
Thread Starter
iTrader: (2)
 
mindcrime's Avatar
 
Join Date: Sep 2014
Location: ca
Posts: 556
Likes: 0
Received 7 Likes on 7 Posts
Default
Originally Posted by WylieKylie
Regardless if the car is lowered or not moving or adjusting the roll center can make a difference in handling. It definitely can become much more important on a lowered car.

But... I don't think anyone outside of Toyota knows where the roll center is in relation to the COG, so adjusting the roll center closer to the COG is at best an educated guess. Someday I'd like to map out the suspension pivots and make that educated guess, but today is definitely not someday!
lol. I see your point. all I know is once a vehicles COG changes, either lower or higher, it affects other aspects of the suspension, steering, handling etc. what's the fun of modifying a vehicle if we can't break things. afterall, that's why there's aftermarket parts right?
mindcrime is offline  
Reply Like
Old 03-31-16, 07:50 AM
  #15  
One2beH8ed
Lead Lap
 
One2beH8ed's Avatar
 
Join Date: Jun 2015
Location: NC
Posts: 541
Likes: 0
Received 0 Likes on 0 Posts
Default
Just like Figs said this isnt the proper way. Its going to throw off your caster causing serious handling issues and maybe even longevity issues.

I would buy a nice set of coil overs or springs and struts. I have learned when lowering my lexus is300 to not cheap out. Just not worth it.
One2beH8ed is offline  
Reply Like



Advanced Search
Quick Reply: sage RCA blocks-20mm


Reply Closed Thread Share
Forum Jump

All times are GMT -7. The time now is 09:32 AM.