Notices
RX-8 Racing Want to discuss autocrossing, road-racing and drag racing the RX-8? Bring it here. This is NOT a kills/street racing forum.

What suspension setup for autocross

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 08-03-2010, 12:11 PM
  #1  
Rotary Power!
Thread Starter
iTrader: (1)
 
Shijin-Kun's Avatar
 
Join Date: Feb 2009
Location: Houston, TX
Posts: 709
Likes: 0
Received 0 Likes on 0 Posts
What suspension setup for autocross

I have tokico d-spec with tein s-techs and i'm wondering what is the best setting on the struts for autocrossing? If it helps in running 225-40-18 in the front and 255-40-18 in the rear.
Old 08-03-2010, 12:26 PM
  #2  
mkuhnracing.com
iTrader: (3)
 
TopGear8's Avatar
 
Join Date: Jun 2007
Location: Charlotte, NC
Posts: 6,212
Likes: 0
Received 4 Likes on 4 Posts
Do you have sway bars?

Put a bigger front bar and keep the stock rear bar. Than run the front shocks a bit stiffer than the rear...If your having oversteer stiffen the rear up. It's all about feel there is no "Best" setting.

Some drivers like a car that pushes more, some like a more tail happy car.
Old 08-03-2010, 12:36 PM
  #3  
Rotary Power!
Thread Starter
iTrader: (1)
 
Shijin-Kun's Avatar
 
Join Date: Feb 2009
Location: Houston, TX
Posts: 709
Likes: 0
Received 0 Likes on 0 Posts
i have stock sway bars. I like to have full control of the car, dont have much experience with the tail sliding out. I have usually been using full stiff on the front and the rear not sure how i like it.
Old 08-03-2010, 12:58 PM
  #4  
mkuhnracing.com
iTrader: (3)
 
TopGear8's Avatar
 
Join Date: Jun 2007
Location: Charlotte, NC
Posts: 6,212
Likes: 0
Received 4 Likes on 4 Posts
That's why they are called controlled slides..This isn't drifting.

Sounds like you should just leave the car the way it is, and get some seat time, so when you do make a change you will actually be able to benefit from it. Right now if you make a change, it might actually hurt you without knowing what your doing wrong.
Old 08-03-2010, 05:26 PM
  #5  
Registered User
 
FastFreddy61's Avatar
 
Join Date: Oct 2009
Location: Eastern Europe
Posts: 421
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Shijin-Kun
I have tokico d-spec with tein s-techs and i'm wondering what is the best setting on the struts for autocrossing? If it helps in running 225-40-18 in the front and 255-40-18 in the rear.
Doesnt the different tyre diameter play havoc with your DSC/Traction control ?
Old 08-03-2010, 05:27 PM
  #6  
Rotary Power!
Thread Starter
iTrader: (1)
 
Shijin-Kun's Avatar
 
Join Date: Feb 2009
Location: Houston, TX
Posts: 709
Likes: 0
Received 0 Likes on 0 Posts
i usually turn it off when autocrossing
Old 08-03-2010, 05:57 PM
  #7  
No respecter of malarkey
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 26,727
Received 2,013 Likes on 1,640 Posts
Originally Posted by Shijin-Kun
If it helps in running 225-40-18 in the front and 255-40-18 in the rear.
It's not helping you to do this .... makes no sense to run staggered tires and/or wheels on an RX-8
Old 08-03-2010, 05:59 PM
  #8  
Rotary Power!
Thread Starter
iTrader: (1)
 
Shijin-Kun's Avatar
 
Join Date: Feb 2009
Location: Houston, TX
Posts: 709
Likes: 0
Received 0 Likes on 0 Posts
well i have no choice. The car was in an accident and i cant put wider tires in the front than 225 because it will rub. Check my other thread for more details.
Old 08-03-2010, 06:04 PM
  #9  
Registered
iTrader: (2)
 
GeorgeH's Avatar
 
Join Date: Oct 2003
Location: Portland OR
Posts: 1,666
Likes: 0
Received 3 Likes on 3 Posts
When I ran D-Specs in stock class on stock springs & matched front & rear tires, I would run the rears about a 1/4 turn less than the fronts, and it worked well for me. Not sure how the s-techs will affect that.

However, as others have noted, with 225 front and 255 rear tires, your car will probably push no matter what you do with the shocks. In fact, it might be faster with the front shocks slightly softer than the rears, but proceed at your own risk on that one.

Overall, I'd recommend backing down both the front & rear one or two turns just to allow the suspension to move a bit more - with the s-techs, there should be no reason to run the shocks at full stiff. The softer settings will allow the suspension to recover from a slide faster, but it will roll more, meaning you have to plan ahead a little bit better.

In the end, it's super easy to experiment with shock settings (assuming you have the cables) so play around a bit.
Old 08-03-2010, 06:14 PM
  #10  
Rotary Power!
Thread Starter
iTrader: (1)
 
Shijin-Kun's Avatar
 
Join Date: Feb 2009
Location: Houston, TX
Posts: 709
Likes: 0
Received 0 Likes on 0 Posts
thanks george that really helps alot and it makes sense. My original plan was to run 255 all around but that fell threw. Anyhow ill try one turn from full still thank god i invested on the cables.
Old 08-03-2010, 07:52 PM
  #11  
Registered
 
jasonrxeight's Avatar
 
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,487
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by TopGear8
Do you have sway bars?

Put a bigger front bar and keep the stock rear bar. Than run the front shocks a bit stiffer than the rear...If your having oversteer stiffen the rear up. It's all about feel there is no "Best" setting.

Some drivers like a car that pushes more, some like a more tail happy car.
are you saying the opposite?
stiffer front sway bar increases understeer, stiffer rear sway bar increases oversteer.
Old 08-03-2010, 07:54 PM
  #12  
Registered
iTrader: (2)
 
GeorgeH's Avatar
 
Join Date: Oct 2003
Location: Portland OR
Posts: 1,666
Likes: 0
Received 3 Likes on 3 Posts
^I think he knows that. However, given the OP's tire size choice, adding more front roll stiffness is probably not a good idea right now. Of course, alignment plays a role as well, but I'm guessing the car steadfastly understeers in it's current condition.
Old 08-03-2010, 08:00 PM
  #13  
Registered
 
jasonrxeight's Avatar
 
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,487
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by GeorgeH
^I think he knows that. However, given the OP's tire size choice, adding more front roll stiffness is probably not a good idea right now. Of course, alignment plays a role as well, but I'm guessing the car steadfastly understeers in it's current condition.
I like loose rear end cuz I trail brake a lot. keeping all four the same.
stock 225/40R19 is a bit understeering. Im thinking 245/35R19 all four
Old 08-03-2010, 09:25 PM
  #14  
No respecter of malarkey
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 26,727
Received 2,013 Likes on 1,640 Posts
Sorry, forgot that was you.

https://www.rx8club.com/series-i-wheels-tires-brakes-suspension-55/tire-gets-stuck-inside-fender-when-turning-left-191688/

Your front end is too low, that's not helping either particularly with the wheel offset.

I thought you put 235/40 on the front to address the problem?
Old 08-03-2010, 11:08 PM
  #15  
Registered
 
jasonrxeight's Avatar
 
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,487
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by TeamRX8
Sorry, forgot that was you.

https://www.rx8club.com/showthread.php?t=191688

Your front end is too low, that's not helping either particularly with the wheel offset.

I thought you put 235/40 on the front to address the problem?
he might have some oversteering issue if hes using stock sway bars and springs.
Old 08-03-2010, 11:13 PM
  #16  
Registered
iTrader: (1)
 
kjchristopher's Avatar
 
Join Date: Oct 2005
Location: redondo beach, ca
Posts: 65
Likes: 0
Received 0 Likes on 0 Posts
I can't tell who is being sarcastic and who is being a dumbass anymore.
Old 08-03-2010, 11:23 PM
  #17  
No respecter of malarkey
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 26,727
Received 2,013 Likes on 1,640 Posts
all of the above
Old 08-03-2010, 11:57 PM
  #18  
mkuhnracing.com
iTrader: (3)
 
TopGear8's Avatar
 
Join Date: Jun 2007
Location: Charlotte, NC
Posts: 6,212
Likes: 0
Received 4 Likes on 4 Posts
Where are we?
Old 05-20-2011, 10:27 AM
  #19  
Angler of the Year
iTrader: (3)
 
slvrstreak's Avatar
 
Join Date: Dec 2009
Location: George-uhh
Posts: 1,557
Likes: 0
Received 5 Likes on 4 Posts
thread bump!
got my Tokico D-specs, Progress Tech springs, and Progress Tech sway in and going to put them on the car soon...heres the question
what settings do most people run shocks on for the street compared to the track???
im thinking (on a scale of 1-7)...5 front, 4 rear for the street...7 front, 5 rear for the track does that sound about right? softer??? harder???
i know its all about feel and ill just have to work with them but i want to know what most people do...as a good starting point
i really dont have much experience with adjustable shocks so im guessing here
same question for the front sway...im thinking full firm all the time for the sway
any help here would be appreciated...thanks guys
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fourwhls
RX-8's For Sale/Wanted
7
02-20-2019 05:16 PM
hufflepuff
Series I Wheels, Tires, Brakes & Suspension
6
05-30-2016 10:45 AM
duworm
Series I Wheels, Tires, Brakes & Suspension
1
10-01-2015 04:57 PM
archon
RX-8 Parts For Sale/Wanted
3
10-01-2015 06:08 AM
Learners_Permit
Series I Interior, Audio, and Electronics
8
09-27-2015 07:38 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: What suspension setup for autocross



All times are GMT -5. The time now is 08:44 PM.