Suspension advice
02-06-2015, 04:05 PM
#12
I made the mistake of BuddyClubs on a Nissan. Single adjustable. Right...., every click turned the rebound up one notch and the compression up two notches. Rode like a covered wagon. If you turned them up enough to handle the roll, the car would hit a bump and skip across the parking lot like a flat stone on a smooth lake.
02-07-2015, 01:25 PM
#13
This.
The only decent stuff from Tein are the SRC's or N1's.
OP, it would be a mistake to replace AST's with Teins. Did you talk to AST regarding spring rates? Find out what their maximum suggested spring rates are for your dampers, then go from there. You can always get them revalved...
The only decent stuff from Tein are the SRC's or N1's.
OP, it would be a mistake to replace AST's with Teins. Did you talk to AST regarding spring rates? Find out what their maximum suggested spring rates are for your dampers, then go from there. You can always get them revalved...
02-08-2015, 09:08 AM
#16
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Guys, first of all thank you for the replies and the interest you have shown
-I believe that the tires that i am using in the track are too sticky for the spring rates of this suspension. (FZ201 255/40/17 60 Treadwear) With my AD08r I do not have this 'problem'.
-I feel like the suspension does not have the 'muscle' needed to plant the semislick tires on the road. Does that make sense? :/
No dyno curves unfortunately.
Full stiff front..
2 clicks (out of 14) from full stiff in the rear.
To be honest at the moment that I felt the rear wobbling a bit, I also had the back at full stiff. (then I backed of 2 clicks)
Nop. (Except from the OEM trunk lip)
I measured the temps after the cooldown lap..
More or less the same in all 4 tires=
65 C inner tire / 149 F
60is C in the centre / 140ish F
55ish C in the outer / 130ish F
Tire pressure
Again after the cooldown lap
2.35bar / 34-35 psi
alignment =
Front 2 degrees. Very little toe out. As much caster as possible
Rear 2.5 degrees. Some toe in / near OEM specs.
-Ride height, i can almost fit 2 fingers in the front and 1 and a half in the back (i know that is crap measurement but I do not remember the exact measurements by heart ;p)
BUT I do have roll centre adjusters and that means that I have all the suspension travel that is possible to have from the suspension..I don't know if you are familiar with the roll centre adjusters but in order to be able to have them you have to adjust the suspension height tat almost full height..Bottom line, plenty of suspension travel
I contacted AST and asked if i can change the springs to stiffer one. I believe that they will reply tomorrow. I will let you know guys
I decided to pass on the Teins. And maybe in the future I will upgrade to a better suspsension. I have my eyes on the Ohlins Road and track or the KW clubsports..But I am hesitant to cough up 2500 euros at the moment..
What exactly is the car doing that you are unhappy with?
-I feel like the suspension does not have the 'muscle' needed to plant the semislick tires on the road. Does that make sense? :/
Do you have dyno curves of your AST damper? And which setting you are using?
Full stiff front..
2 clicks (out of 14) from full stiff in the rear.
To be honest at the moment that I felt the rear wobbling a bit, I also had the back at full stiff. (then I backed of 2 clicks)
Do you have aero?
Have you taken tire temperatures?
More or less the same in all 4 tires=
65 C inner tire / 149 F
60is C in the centre / 140ish F
55ish C in the outer / 130ish F
Tire pressure
Again after the cooldown lap
2.35bar / 34-35 psi
Also what is your alignment?
Front 2 degrees. Very little toe out. As much caster as possible
Rear 2.5 degrees. Some toe in / near OEM specs.
What is your ride height set at? I know these dampers have limited rear bump travel - a common s2000 problem
BUT I do have roll centre adjusters and that means that I have all the suspension travel that is possible to have from the suspension..I don't know if you are familiar with the roll centre adjusters but in order to be able to have them you have to adjust the suspension height tat almost full height..Bottom line, plenty of suspension travel
I contacted AST and asked if i can change the springs to stiffer one. I believe that they will reply tomorrow. I will let you know guys
I decided to pass on the Teins. And maybe in the future I will upgrade to a better suspsension. I have my eyes on the Ohlins Road and track or the KW clubsports..But I am hesitant to cough up 2500 euros at the moment..
02-08-2015, 10:48 AM
#19
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Robinson, i believe the rears have different length with the front ones..(?)
I did reduce the rear rebound and the suspension worked better..i shaved 1/2 sec of the laptime after that..
Next step, is to get myself stiffer springs and tale it from there..I am awaiting reply from AST for that..
I did reduce the rear rebound and the suspension worked better..i shaved 1/2 sec of the laptime after that..
Next step, is to get myself stiffer springs and tale it from there..I am awaiting reply from AST for that..
02-09-2015, 05:07 AM
#20
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I did speak with AST today..
Really helpfull people I must say!
This is the email i got after explaining my 'problem'
So..to sum up..
I am going to need a revalve if i am going to proceed with changing to stiffer spring rates
Really helpfull people I must say!
This is the email i got after explaining my 'problem'
Thank you for your clear and detailed email.
I understand the situation you are having with the grip level.
The displacement of car weight on its wheels will be too much with the current springs. The tires will generate a lot of grip.
You’re correct with your idea about this(well done).
You are already running on maximum rebound damping. This means that with stiffer springs you will not have sufficient damping inside.
Changing the setting will be needed if you want to increase the spring rates.
I would suggest going to 100N front and 100N rear. The S2000 is a well balanced car and can run these rates very well.
The springs that are standard on this kit are:
Front 140-80-61/80-20-61
Rear 140-70-61/80-20-61
The 80-20-61 is the helper spring. You only need to replace the main springs.
They are €50,- each ex VAT.
Revalving the shocks will be €75,- ex VAT each. If you want to do this together with the rebuild then you do not pay extra. Cost for rebuild will be €105,- ex VAT each.
Let me know if you need any further information,
I understand the situation you are having with the grip level.
The displacement of car weight on its wheels will be too much with the current springs. The tires will generate a lot of grip.
You’re correct with your idea about this(well done).
You are already running on maximum rebound damping. This means that with stiffer springs you will not have sufficient damping inside.
Changing the setting will be needed if you want to increase the spring rates.
I would suggest going to 100N front and 100N rear. The S2000 is a well balanced car and can run these rates very well.
The springs that are standard on this kit are:
Front 140-80-61/80-20-61
Rear 140-70-61/80-20-61
The 80-20-61 is the helper spring. You only need to replace the main springs.
They are €50,- each ex VAT.
Revalving the shocks will be €75,- ex VAT each. If you want to do this together with the rebuild then you do not pay extra. Cost for rebuild will be €105,- ex VAT each.
Let me know if you need any further information,
So..to sum up..
I am going to need a revalve if i am going to proceed with changing to stiffer spring rates
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