REstackor

Started by mog , Mar 24 2010 02:47 PM

135 replies to this topic

  • chrismxer

Posted 03 November 2010 - 09:46 PM

#41

mog said:

ive found out there is a error on the showa crf rebound values, so use the showa 2010 rmz ones for now until someone can verify the correct ones.

This is what I have for the 50mm showa shock reb.

D-rod 16
D-valve 50
W-seat 1.6
V-spec mvc
R-port 10.8
D-port 8.75
W-port 13.25
N-port 4
D bleed 3
clicks 20

Comp

D.rod-16
D.valve-50
w.seat-1.5
Vspec-mvc
r.port-10.9
D.port-10.5
W.port-17
N.prt-4
D.thrt-na
n.thrt-na
D.bleed-3
N.clicks-20


Something I'm not sure about is the D.thrt and nthrt. On the restackor website he gives a crf450 example and says those aren't needed but on the comp side there is clearly a restriction and a smaller one on the reb side.

Edited by chrismxer, 09 November 2010 - 07:18 AM.

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  • Clicked

Posted 09 November 2010 - 05:57 AM

#42

Thanks chrismxer!

The valve port dimensions used to compute the port flow area at the shim stack face are illustrated on this crf450  shock valve photo frezno posted. frezno posted the photo to show installation of the valve slider bushing.

Posted Image

Port “throat” area:
The minimum flow area in the valve port “throat” for this crf450 valve depends on how wide the lip is in the valve port.

Posted Image

To get the throat area/diameter “d.thrt” the question is: what is the width of the “Lip” inside the valve port?

chrismxer: The 1.6 mm w.seat width in your table, is that the width of the shim stack seat or does it also include the lip?

  • chrismxer

Posted 09 November 2010 - 07:17 AM

#43

The 1.6 is just what it is, the width of the seat that the shims contact on the outside face of the valve. The lip width along the d-port is 1.5 and about .8 along the outer edge next to the w-port measurement. This is the reb side the comp side is much different.

  • Clicked

Posted 10 November 2010 - 07:23 AM

#44

O.K. This is what I thought I read you wrote:

Posted Image

That gives a valve minimum throat diameter of 12.3 mm and crf450 shock rebound valve dimensions of:

Posted Image

Do you have the dimensions for the compression side?

  • chrismxer

Posted 11 November 2010 - 09:34 AM

#45

Here is the comp side.

W thrt- 10.7
D thrt- 5.6
R thrt- 15

  • Jusa

Posted 14 November 2010 - 09:23 AM

#46

Does anyone have KTM fork bv piston port info? Thanks!:p

Jusa

  • Clicked

Posted 15 November 2010 - 07:25 AM

#47

crf450 shock valve dimensions:

Posted Image

Valve seat lip thickness is around 1.6 mm but the face shims only overlap 0.5mm so w.seat was set at 0.5mm.

The valve ports are pretty wide open. The flow restriction of the lip inside the valve port doesn't kick in until shaft velocities above 150 in/sec.

Posted Image

Considering the shock linkage ratio that is a pretty high suspension velocity. So the valve of d.thrt isn't to important for performance. Anyway we have it measured now.

Anybody have anything for the clicker needle geometry?

Edited by Clicked, 16 November 2010 - 06:42 AM.

  • Clicked

Posted 15 November 2010 - 07:26 AM

#48

Jusa said:

Does anyone have KTM fork bv piston port info? Thanks!:p

Jusa

I've got some stuff on the WP forks. I will post that tomorrow.

  • suhoi27

Posted 15 November 2010 - 01:10 PM

#49

I see something like a new,updated version of the one I already have..for example a leak is added....Can I update my version or I have to buy it again?

  • harrperf

Posted 15 November 2010 - 04:13 PM

#50

Can I ask how you quickly compare the different set ups...

Are you plotting two on one chart off saved data from each?

Also - would it be easy to upload onto your site various piston dimensions that you have acquired thus far - I think that would be useful...you could even include it into a look up table, could you not?

Just some tips/ideas for improvement.

  • Clicked

Posted 16 November 2010 - 06:48 AM

#51

suhoi27 said:

I see something like a new,updated version of the one I already have..for example a leak is added....Can I update my version or I have to buy it again?

Just download the latest version and replace you existing files. You need to replace the spreadsheets with the new version too.

harrperf said:

Can I ask how you quickly compare the different set ups...

Copy/paste results into a new spreadsheet tab and add the curves to the plot. It is a PIA.

  • Clicked

Posted 16 November 2010 - 06:54 AM

#52

Jusa said:

Does anyone have KTM fork bv piston port info? Thanks!:p

Jusa

Jusa: This is for a 2005 ktm950 "S" suspension.

Fork base valve:
Posted Image

..and the mid-valve:
Posted Image

Posted Image

  • Jusa

Posted 16 November 2010 - 07:00 AM

#53

Thanks a lot Clicked!:p

  • suhoi27

Posted 18 November 2010 - 08:10 AM

#54

In case somebody needs the new version of Restackor, here is the way to upgrade your existing version (paid one):
You don't have to buy a new copy. To run the latest version of ReStackor:

Delete your existing C:\ReStackor folder.
Download the latest copy of the ReStackor demo from the web site.
Unzip the demo and copy the  ReStackor folder to C:\ReStackor.
The demo will pickup your existing license and run.

Obviously if you have any files in your C:\ReStackor directory that you want to save you should copy those to some other directory before you delete it .

This is not a secret and it is fully legal way to update your version!
Once  again: Great product with Great Support!

  • mog

Posted 18 November 2010 - 08:21 AM

#55

and whats the main differences?

  • racerfmx450

Posted 18 November 2010 - 12:39 PM

#56

mog said:

and whats the main differences?

metric outputs and grafics:thumbsup:

  • mog

Posted 31 March 2012 - 09:21 AM

#57

anyone got pds piston, the first piston?

  • podium werx

Posted 08 April 2012 - 12:13 PM

#58

Has any body got the spec for a kxf250 2011 ssf thanks Brian

  • no hand

Posted 10 April 2012 - 06:12 PM

#59

Haha this thread got Restackor going. I was hoping someone would chime in with 2008 YZF piston data.

  • mog

Posted 11 April 2012 - 03:17 AM

#60

Dissapointing the response,  I have the yzf stuff at home will post later
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