09 Shocks... Side by side comparison to 04-08
So i had a chance to take the stock shocks off last night in order to compare them to the yellows that i have been waiting to install. In comparison to the yellows and to a set of oe 04 shocks, there is only one slight difference in the shocks and that is that the perch height is about a 1/4" higher on the 09 shocks than it is on the previous models. I have the stock ones out and am gonna have a spacer made for the spring. I was originally gonna have the shocks sent to koni, however the difference is so small that im just gonna get a spacer. All other dimensions including shaft length and body length are identical. I should be able to get pictures later tonight of the two shocks side by side.
Sacha |
Originally Posted by conekiller2
(Post 3020783)
So i had a chance to take the stock shocks off last night in order to compare them to the yellows that i have been waiting to install. In comparison to the yellows and to a set of oe 04 shocks, there is only one slight difference in the shocks and that is that the perch height is about a 1/4" higher on the 09 shocks than it is on the previous models. I have the stock ones out and am gonna have a spacer made for the spring. I was originally gonna have the shocks sent to koni, however the difference is so small that im just gonna get a spacer. All other dimensions including shaft length and body length are identical. I should be able to get pictures later tonight of the two shocks side by side.
Sacha |
Originally Posted by conekiller2
(Post 3020783)
I should be able to get pictures later tonight of the two shocks side by side.
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R3?
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Let's see some pics.
Would a spacer make it BS legal? |
09 sport, pics shortly
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Originally Posted by S0l08
(Post 3021060)
Let's see some pics.
Would a spacer make it BS legal? From what I hear the R3 is different. |
Picture. We have ours at a machine shop to right now which is C&C pieces to raise the height and duplicate the differing perch. :banghead:
We measure 1/2 inch diff in height. http://farm3.static.flickr.com/2171/...b2c630dc_b.jpg |
Originally Posted by treinhar
(Post 3021346)
Picture. We have ours at a machine shop to right now which is C&C pieces to raise the height and duplicate the differing perch. :banghead:
We measure 1/2 inch diff in height. |
5 Attachment(s)
Here are the pics that i took. I measured 15mm on the flat side and 10mm on the ramp side.
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a) it better be the perfect thickness, too much or too little is a DSQ violation
b) adding it to a helical perch isn't as easy as you think c) the helical angle and spring contact surface length also have to be a dead match to OE the Miata application mentioned had a loose perch and the shock body had grooves that a c-clip fit into to locate the perch, so adding a flat shim of proper thickness was easy in comparison to what's being proposed here ... |
well im sill thinking about sending the oe shocks and the yellows for modification as an option
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Anyone know about how much it's going to cost to get the perch moved up.
And this might be a dumb question, but has anyone tried to get the rears externally adjustable? |
I will probably send the oe ones and the yellows to koni next week and i had the same question about making the rear externally adjustable. will keep you posted
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Originally Posted by S0l08
(Post 3021973)
...
And this might be a dumb question, but has anyone tried to get the rears externally adjustable? FWIW, Truechoice Koni Racing Service had a better lead-time than Koni NA a couple months ago. |
It doesn't cost that much more to get DA vs external rebound only, they still have to disassemble the shock in entirety and replace all the seals etc.
my recommendation is to have the perch relocated, it's actually very easy to do it yourself on a twin tube shock if you have the metal working skills/tools, the tricky part is locating it properly |
Originally Posted by conekiller2
(Post 3022001)
I will probably send the oe ones and the yellows to koni next week and i had the same question about making the rear externally adjustable. will keep you posted
I plan on sending mine in next week. I have an event this weekend and then nothing till July. But its my DD so I can't send in my stockers. Hoping someone else sends in a set before me so they have the specs. |
I would assume that this means that all aftermarket shocks for 04-08 RX8's will have a similar difference when applied to the 09's?
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Originally Posted by Symbioticgenius
(Post 3029318)
I would assume that this means that all aftermarket shocks for 04-08 RX8's will have a similar difference when applied to the 09's?
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They are actually being shipped to Koni today.
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Originally Posted by conekiller2
(Post 3029893)
They are actually being shipped to Koni today.
Did you get the externally adjustable? Price? |
Call Phil Harris @ Truechoice Koni Racing Services 1-888-566-4722
http://www.truechoicekoniracingservices.com/ . |
Originally Posted by TeamRX8
(Post 3021446)
a) it better be the perfect thickness, too much or too little is a DSQ violation
b) adding it to a helical perch isn't as easy as you think c) the helical angle and spring contact surface length also have to be a dead match to OE the Miata application mentioned had a loose perch and the shock body had grooves that a c-clip fit into to locate the perch, so adding a flat shim of proper thickness was easy in comparison to what's being proposed here ... http://farm4.static.flickr.com/3353/...4c2e8af6_o.jpg So the question is: If the low point and high point of the perch is identical to OEM are we OK. This is true for the Koni’s used but the rate of rise in the perch between these 2 points differs on the Koni vs OEM. Where in the rule book is the requirement for perch dead match? |
Mine are out at koni as we speak. More than likely i will have them converted to double/external since they have to be taken apart anyways. i will have an answer hopefully today. They have already sent the info and measurements they gathered from my stock 09 rears to holland to start producing an 09 specific rear fitment
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I called them and they told me they could not convert them to external adjustabilty.
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