|
So more dampening at lower speeds is when the car is reacting to driver input/turning. Where faster speed is the potholes.
<br />Linear you have to compromise these 2 and digressive you get the best of both worlds? |
Hmmm, my ARE built Penske shocks have linear pistons. Obviously Penske has digressive/digressive pistons available. Hell, Penske has pistons no other shock company has available.
Maybe since mine are purpose built for autox? Whatever the reason, I'm not going to question Guy Ankeny. At least not on building an autox shock, and for a CSP Miata no less. Last I remember Guy's shocks have been on all the CSP champ Miatas other than Peter's and Aro's in the last ten years. But since this is a road race conversation, maybe they don't apply. |
Originally Posted by aidandj
(Post 1259688)
So more dampening at lower speeds is when the car is reacting to driver input/turning. Where faster speed is the potholes.
<br />Linear you have to compromise these 2 and digressive you get the best of both worlds? yes- suspension tuning is always a compromise. Digressive is usually a better compromise vs. linear. |
Originally Posted by hector
(Post 1259738)
Hmmm, my ARE built Penske shocks have linear pistons. Obviously Penske has digressive/digressive pistons available. Hell, Penske has pistons no other shock company has available.<br /><br />
<br /><br /><br /><br /> <br /><br />Maybe since mine are purpose built for autox? Whatever the reason, I'm not going to question Guy Ankeny. At least not on building an autox shock, and for a CSP Miata no less. Last I remember Guy's shocks have been on all the CSP champ Miatas other than Peter's and Aro's in the last ten years.<br /><br /> <br /><br /><br /><br /> <br /><br />But since this is a road race conversation, maybe they don't apply. <br /><br />I'm supposed to believe everything I read on the internet, but my mommy says the internet isn't always right. <br /><br />Now I'm lost. I should buy a book on this. |
Auto-X != Road Course.
In a lot of ways, this included. |
<p>Different dynos?</p>
|
<p>Yep. the Xidas were so awesome that they broke the local dyno and had to be sent to california :party:</p><p>:giggle:</p><p>I want to say stuff, but I'm probably the last person who should say stuff.... but just one comment.</p><p><img src="https://cimg5.ibsrv.net/gimg/www.miataturbo.net-vbulletin/1024x791/80-149030_motion_control_single_adjustables_installed _short_2520f_2520vs_2520av_page_001_zpssnagdxmz_5a b091020ca42ef6b7019099f98a36c4499b4f08.jpg" title="" /><br /><br />This looks about like what Emilio had posted previously for the Xidas, no?</p>
|
<p>There is a lot to love about that force v. displacement graph from the Xidas.</p>
|
Originally Posted by Seefo
(Post 1264650)
<p>There is a lot to love about that force v. displacement graph from the Xidas.</p>
|
Same type of shock dyno, local dyno was down so they got shipped out to Performance Shock. Look at the rear force v. velocity and tell me what you see.
|
Originally Posted by greddygalant
(Post 1264657)
Same type of shock dyno, local dyno was down so they got shipped out to Performance Shock. Look at the rear force v. velocity and tell me what you see.
|
The graph that keeps getting quoted is the same as Emilio posted. But what you guys are not understanding about that graph is that it is an AVERAGE. Yes, the rear Xidas are a true double digressive design, but look at the normal force vs. velocity graphs. Do you see that they start at a point, end at a point, then come back to the original point? This is the full stroke of the shock, forward and back. No shock will have the same line forward and back, but what you want to see is as little deviation as possible. This is called hysteresis. While the rears are a true double diggressive design, look at the deviation. That is A LOT. The fronts, on the other hand, appear to be diggressive in compression, and not so much on rebound. The hysteresis on the graphs on the front is not as bad, in fact it is pretty good. You can't just single out 1 graph (i.e. the graph that keeps getting quoted) and say "well look at that, it is just as good as we thought". The fact is that the rear shock and front shock have different graphs, and the rear shock is not of equal quality as the front.
The MCS, on the other hand, are very consistent. However, I wonder why they didn't do a diggressive piston either, they seem to be quite linear to me. Disclaimer: I'm not saying Xidas suck or anything, just saying what's up with the rear shock quality? I have no affiliation with MCS, just stating what I see in the graphs. |
Originally Posted by Savington
(Post 1264658)
What do you think we should be seeing?
Also the reason the mcs are linear is because they use a proprietary tulip valve inside rather than a needle valve like everything else out there. I spoke to Lex at MCS and he spoke very highly of Penske's ability to make a race quality needle valve damper. Considering the companies are direct competitors and meet regularly in major sports car series I found this to be very interesting. |
<p>Thanks for the explanation Jack. I see that now.</p><p> </p><p>There's no question the MCS makes prettier, smoother graphs. Very interesting.</p><p> </p><p>the valving is also clearly very different, right? What are thoughts on valving differences? Has anyone actually solidly stated if digressive is better than the linear MCS, or no?</p><p>Pretty clear it seems that the MCS are higher quality dampers. But are they actually better for a track miata with the different valving?</p><p> </p>
|
Originally Posted by turbofan
(Post 1264675)
Pretty clear it seems that the MCS are higher quality dampers.
There is more to the damper than meets the eye if you take them both apart. Surface finishes, deburring, coatings. |
<p>Will someone please take all of that data and normalize it.</p><p>Also, it looks like the xidas have a huge range of adjustment. Why are we not comparing say the middle or both ends of the spectrum.</p><p>The xida almost changes the shape of the plot over the adjustment window.</p><p>Martin, do you have this data in any format other than pictures?</p>
|
<p>Affects the deltas and curves, yes, but doesn't affect the presence or absence of hysteresis, right?</p><p>Don't get me wrong, I'm still happy with the direction I chose to take. Just trying to learn here.</p>
|
Originally Posted by aidandj
(Post 1264694)
<p>Will someone please take all of that data and normalize it.</p><p>Also, it looks like the xidas have a huge range of adjustment. Why are we not comparing say the middle or both ends of the spectrum.</p><p>The xida almost changes the shape of the plot over the adjustment window.</p><p>Martin, do you have this data in any format other than pictures?</p>
|
<p>
Originally Posted by 90civichhb
(Post 1264653)
Could you elaborate on that a bit more?
|
| All times are GMT -4. The time now is 06:41 AM. |
© 2024 MH Sub I, LLC dba Internet Brands