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Old 11-16-2017, 01:29 PM   #1
pearson222
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2006 RPW STi

Default Zero ride comfort with new RCE Tarmac 2's

I have purchased a brand new set of Tarmac 2's ~6 months ago, and for the life of me cannot find any setting that is comfortable. I have 400/350 springs and am at 14"(front) and 13.5"(rear). I have tried dozens of settings and they all pickup every single imperfection in the road. Even freshly paved roads have the car jolting around. I am able to notice adjustments in settings withe the fronts, but the rears act and feel the same regardless of what settings are used. Going over a seam at ~5mph the fronts will bounce a little but the rear will "bounce" 10x more. I have also already done the "seat-mod" (stretch seat springs, heavy duty zip ties under seat cushing etc...)

Currently my settings are:
(Bump/Rebound)

Front: 8/12
Rear: 10/14

RCE Lowering Camber Plates (Front)
RCE Pillowball Top Mounts (Rear)
22mm Whiteline Sway w/ Whiteline links (Front)
24mm Whiteline Sway w/ Kartboy Links (Rear)

Any help or guidance would be appreciated - this is making the car really unenjoyable to drive.
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Old 11-16-2017, 01:41 PM   #2
blurred
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I'm on 600/500 spring on mine (no idea what settings, it just worked from install) and it is very comfortable except obviously over slow speed sharp bumps/potholes. Your springs are too stiff to do anything at low speed, so don't try to "fix" that problem. think that you need 400lbs of force to move the spring 1" so if that "bump" is not providing that force the car will bounce over it with no real suspension movement. If you hit the same bump at 100mph the force should be enough for the suspension to move and soak it up.

If it is really important to soften that hit at low speed you will need to lower your bump damping right down and then try to tune the rebound to take out the bounce, but this would ruin everything else. Have you tried the recommended settings? those should be a good start.
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Old 11-16-2017, 01:47 PM   #3
Big-E
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OP, have you upgraded the suspension bushings?
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Old 11-16-2017, 01:57 PM   #4
pearson222
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2006 RPW STi

Default

The low speed ride comfort is what is expected with any stiff spring setup, so that is not really my concern. What makes it unenjoyable is the ride @ 50+mph. The car picks up every little road imperfection and has the car jolting front to back and side to side. It really makes the vehicle hard to control as I have to constantly try my best to prevent those abrupt movements from being transferred to the steering wheel.

Quote:
Originally Posted by blurred View Post
Have you tried the recommended settings? those should be a good start.
Yes I have tried the 12/12 & 12/14 recommended settings and I can not tell any difference.

Quote:
Originally Posted by Big-E View Post
OP, have you upgraded the suspension bushings?
Which bushings are you referring to?
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Old 11-16-2017, 03:24 PM   #5
RaceComp Engineering
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ASK ABOUT NEW RCE
SWAY BARS FOR STI

Default

The 400/350 spring rates on T2s are pretty comfortable overall...I'm trying to think of what's going on here. They certainly don't usually behave in the way that you're describing.

The rebound setting has the most effect on ride quality, but I'm wondering if there's something else going on.

Please do give us a call when you get a chance. Myles can help walk you through setting them up or diagnosing what's causing the poor ride.

- Andrew
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Old 11-16-2017, 06:34 PM   #6
blurred
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Quote:
Originally Posted by pearson222 View Post
. What makes it unenjoyable is the ride @ 50+mph.
Oh, sorry, I read 5mph in your original post.


Crazy question... did you turn them all in the right direction to set compression/rebound? you aren't at opposite settings side to side, or front to back...?

Otherwise, just give Myles a call as referenced above, your experience seems like an odd situation

The only thing I might suggest is to go back to oem sway bars and let the springs do their job instead of jacking the rate side to side
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Old 11-16-2017, 06:58 PM   #7
RaceComp Engineering
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Im around most of the time via cell. 443 370 9000

Before you call me as one mentioned above make sure that you are FIRST, turning the adjustment knob clockwise to make it full stiff first. THEN back it off the desired clicks( if no click then remember each "click" is a quarter turn)

When all fails start at 8888.

Thats:

front compression: 8 clicks from full stiff
front rebound 8 clicks from full stiff

rear compression: 8 clicks from full stiff
rear rebound: 8 clicks from full stiff.

NEXT: based on your "feeling" and preference, increase or decrease REBOUND by 2 clicks first. ONE adjustment at a time to determine and feel the changes.

Do this with a note pad of your changes. Once you can feel the changes you will have some basic direction. Once you get it almost where you want it. THEN you can adjust compression, but do it by adjusting 1 click at a time and look for the changes to be during slower chassis movements( lower speeds).

After you get this to a "nice" feeling, leave it there for a few days and drive your normal roads , bumps etc.

Sleep on it, come back to it next day and work on trying to FEEL if the front or the rear of the car needs any changes. Inevitably the rear WILL need to be adjusted softer........OR the front will need to be adjusted FIRMER.

On the GD chassis the front is always firmer typically.

Hope this helps.

Myles
RCE
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Old 11-18-2017, 01:03 PM   #8
milab21
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Did you ever do an alignment after install of the T2's? Just curious..
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