How to Read Coilover Dyno?

dplxy · 07-27-2004, 02:45 PM

help me plz.... :wiggle:

GRiDRaceTech · 07-27-2004, 02:52 PM

Read it only by the linearity. Notice how linearly the shocks rebound, and the smooth ramp up to compression... they're obviously high quality and have good valves. (Of course they're SPLs)

You'd have to read pretty extensively on shock absorber technology to understand the relevance of force vs. velocity. (I'm not that far, even...)

dplxy · 07-27-2004, 03:50 PM

thank you for ur informations

http://www.kts-web.com/product/catalog/db_00.html

this is the KTS damper they r selling
one of my japanese friend told me that KTS are cheap in japan
775 USD out the door, if they r really selling 775 OTD, SPL isnt making alot of money, they r selling 1040 shipped

GRiDRaceTech · 07-27-2004, 06:56 PM

I just found some money with which to buy the KTS'. I'm placing an order as soon as SPL e-mails me back.

dplxy · 07-27-2004, 09:39 PM

im getting 1 for my 92 240sx
^^

mranlet · 07-28-2004, 07:12 AM

Well, a stiffer damper will take more force to compress it at a higher rate (velocity). The chart is basicly saying that you will have to subject the damper to 150lbs of compression force at 5 in/sec and it will rebound with ~500 lbs of expansion force at 5in/sec (with the 500 being negative becuase it is expansion).

The higher the forces at a given velocity, the stiffer the dampers. Some dampers might require more force on the compression (bound) stroke than on the expansion (rebound) stroke, and others might have the opposite effect, or rebound with more or less force at a given velocity.

Generally, dampers that exhibit anything more than twice the rebound force than the bound force are going to be good. I'm not sure if there is such a thing as too much rebound force, but it's rare to see rebound forces in excess of 2.5 times the bound forces.

Linear dampers are much more favorable than mercurial dampers because they are more predictable and consistent, which is always good when you are hanging on to control by a hairy edge...

Slonie · 07-28-2004, 01:56 PM

It's nice to see that the rebound characteristic actually changes significantly over each setting (and linearly too with each "click").

This is in stark contrast to a certain shock dyno plot posted online recently for a product starting with J and I and ending with C.

dplxy · 07-28-2004, 06:20 PM

is Tein RA and SPL

07-27-2004, 02:45 PM	#1
dplxy Newbie Join Date: Apr 2004 Location: Arcadia, Socal Posts: 40	Noob Question----How to Read Coilover dyno help me plz.... :wiggle:

07-27-2004, 02:52 PM	#2
GRiDRaceTech Opposite Lock Join Date: Jan 2004 Location: SoCal Posts: 1,096	Read it only by the linearity. Notice how linearly the shocks rebound, and the smooth ramp up to compression... they're obviously high quality and have good valves. (Of course they're SPLs) You'd have to read pretty extensively on shock absorber technology to understand the relevance of force vs. velocity. (I'm not that far, even...) Last edited by GRiDRaceTech; 07-27-2004 at 02:58 PM.

07-27-2004, 03:50 PM	#3
dplxy Newbie Join Date: Apr 2004 Location: Arcadia, Socal Posts: 40	thank you for ur informations http://www.kts-web.com/product/catalog/db_00.html this is the KTS damper they r selling one of my japanese friend told me that KTS are cheap in japan 775 USD out the door, if they r really selling 775 OTD, SPL isnt making alot of money, they r selling 1040 shipped Last edited by dplxy; 07-27-2004 at 03:54 PM.

07-28-2004, 06:20 PM	#8
dplxy Newbie Join Date: Apr 2004 Location: Arcadia, Socal Posts: 40	is Tein RA and SPL Attached Images

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07-27-2004, 06:56 PM	#4
GRiDRaceTech Opposite Lock Join Date: Jan 2004 Location: SoCal Posts: 1,096	I just found some money with which to buy the KTS'. I'm placing an order as soon as SPL e-mails me back.

07-27-2004, 09:39 PM	#5
dplxy Newbie Join Date: Apr 2004 Location: Arcadia, Socal Posts: 40	im getting 1 for my 92 240sx ^^

07-28-2004, 07:12 AM	#6
mranlet Smokes Dynamite Join Date: Dec 2003 Location: Tampa, CT, all over the place! Posts: 1,090	Well, a stiffer damper will take more force to compress it at a higher rate (velocity). The chart is basicly saying that you will have to subject the damper to 150lbs of compression force at 5 in/sec and it will rebound with ~500 lbs of expansion force at 5in/sec (with the 500 being negative becuase it is expansion). The higher the forces at a given velocity, the stiffer the dampers. Some dampers might require more force on the compression (bound) stroke than on the expansion (rebound) stroke, and others might have the opposite effect, or rebound with more or less force at a given velocity. Generally, dampers that exhibit anything more than twice the rebound force than the bound force are going to be good. I'm not sure if there is such a thing as too much rebound force, but it's rare to see rebound forces in excess of 2.5 times the bound forces. Linear dampers are much more favorable than mercurial dampers because they are more predictable and consistent, which is always good when you are hanging on to control by a hairy edge...

07-28-2004, 01:56 PM	#7
Slonie is a composite character Join Date: Dec 2003 Location: Norcal Posts: 173	It's nice to see that the rebound characteristic actually changes significantly over each setting (and linearly too with each "click"). This is in stark contrast to a certain shock dyno plot posted online recently for a product starting with J and I and ending with C.