Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...
Sponsored by:
Sponsored by:

XIDA-S how much stroke travel needed?

 
Old 04-04-2012, 01:03 PM
  #21  
Senior Member
iTrader: (6)
 
Join Date: Jun 2010
Location: San Rafael, CA
Posts: 1,358
Total Cats: 68
Default

Originally Posted by emilio700 View Post
Stroke (not travel) is 103mm front, 120mm rear. Damper body lengths, stops and mounts are configured to allow a 225/45/15 on our 9" wheel to hit the front shock tower bulge with about 5-10mm interference with -3 camber. This overlap was designed in to allow a bit more bump travel with narrower 205's on 8" wheels. Our enduro cars all have polished tubs and a nice wedge of rubber under there.

On a Miata at 4" with the 225/45 on our 9" combo, almost all the stroke is used
up with sag, very little bump travel left. At rest, there is usually only 10mm or so left before the stop is engaged up front. On paper that sounds shaky. On track, it drowns in win soup.
Emillio are the above comments with NB top hats or AST top mounts?
k24madness is offline  
Old 04-04-2012, 11:20 PM
  #22  
Senior Member
iTrader: (1)
 
Join Date: Nov 2010
Posts: 946
Total Cats: -256
Default

Suspension theory question-if you have a 7 inch spring with some preload on the rear isn't that enough to extend the shock on dips and broken pavement? And isn't the unsprung weight enough to continue to extend the shock once the spring is totally extended?
wannafbody is offline  
Old 04-06-2012, 05:16 PM
  #23  
Senior Member
 
Join Date: May 2011
Posts: 626
Total Cats: 71
Default

Originally Posted by wannafbody View Post
Suspension theory question-if you have a 7 inch spring with some preload on the rear isn't that enough to extend the shock on dips and broken pavement? And isn't the unsprung weight enough to continue to extend the shock once the spring is totally extended?
a 7" spring is long enough where you'd start to run into problems with spring bind...
EErockMiata is offline  
Old 04-07-2012, 04:26 AM
  #24  
Junior Member
 
Join Date: Sep 2009
Location: Bergen, Norway
Posts: 128
Total Cats: 12
Default

Originally Posted by wannafbody View Post
Suspension theory question-if you have a 7 inch spring with some preload on the rear isn't that enough to extend the shock on dips and broken pavement? And isn't the unsprung weight enough to continue to extend the shock once the spring is totally extended?
As long as it`s still loose at full droop you might run into a situation where the shock does not extend enough into the dip. Unsprung weight will not be enough to push the tire down. Not fast enough and will not take any load when extended and therefore not really doing anything...

Originally Posted by EErockMiata View Post
a 7" spring is long enough where you'd start to run into problems with spring bind...
I have Xidas and 7" springs in the rear. No problem with bind. See video;

http://vimeo.com/37469352
lassi is offline  
Old 04-07-2012, 07:04 AM
  #25  
Junior Member
 
Join Date: Dec 2010
Location: UK, in Cambridgeshire or wherever work takes me.
Posts: 375
Total Cats: 20
Default

^ Great video
owenwilliams is offline  
Old 04-07-2012, 07:45 PM
  #26  
Senior Member
 
Join Date: May 2011
Posts: 626
Total Cats: 71
Default

Originally Posted by lassi View Post

I have Xidas and 7" springs in the rear. No problem with bind. See video;

http://vimeo.com/37469352
Wow. I should have kept my mouth shut. I could have sworn when i did all my beer can measuring it wouldn't work out. Failure.

Originally Posted by owenwilliams View Post
^ Great video
indeed. that's a great vid. thanks for posting it.

related: is the motion ratio of the miata ~1.6?
EErockMiata is offline  
Old 04-07-2012, 11:30 PM
  #27  
Senior Member
iTrader: (1)
 
Join Date: Nov 2010
Posts: 946
Total Cats: -256
Default

I think Brain and others have had issues with softer 6 inch springs.
wannafbody is offline  
Old 04-08-2012, 01:33 PM
  #28  
Junior Member
 
Join Date: Sep 2009
Location: Bergen, Norway
Posts: 128
Total Cats: 12
Default

Originally Posted by wannafbody View Post
I think Brain and others have had issues with softer 6 inch springs.
6" springs made my piggly MSM sit way to low in the rear for street duty. And I don`t even have a rollbar yet...

Fronts are fine with 6" springs, even have some compression left on the helpers with car static on the ground.

7" in the rear gives me my desired ride height, but need extra bushing on shaft to have enough droop available to let the helper do more than beeing a spring spacer. Also full droop is most likely way out of range of of the chassis ability to move independently with the rear swaybar connected.

I will make new video with the new spring locators and 6" springs along with FM`s tophat spacers to see if it will put the suspension in the correct range of motion. Maybe what the MSM`s should really have is a heavier rate helper...
lassi is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
nbdooey
Miata parts for sale/trade
9
08-30-2017 09:50 PM
Trent
WTB
2
10-01-2015 12:15 PM
brandonbkd
MEGAsquirt
0
09-28-2015 11:52 PM
nbdooey
Miata parts for sale/trade
0
09-28-2015 08:46 PM
Voltwings
Cars for sale/trade
0
09-27-2015 06:40 PM


Thread Tools
Search this Thread
Quick Reply: XIDA-S how much stroke travel needed?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.