XIDA coil overs installed- I'd like to raise the car a bit - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


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

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-29-2012, 03:07 AM   #41
Junior Member
 
Join Date: Dec 2010
Location: UK, in Cambridgeshire or wherever work takes me.
Posts: 376
Total Cats: 19
Default

Joe, are you saying that even with minimal preload on the rears, due to you spacing the car up instead of winding up the springs, you're still experiencing bound helpers?
owenwilliams is offline   Reply With Quote
Old 05-29-2012, 03:25 AM   #42
Junior Member
 
Join Date: Jan 2010
Location: Renton, WA
Posts: 63
Total Cats: 0
Default

When the car is static, yes. I assume the helpers are working though because when I jack up the rear they do expand about half way, so I assume when I go over a bump they do their job and shove the tire back into the ground to keep that contact patch.

The only video i've found of the rear suspension in action is this. Looks like he has an aftermarket sway bar in the rear (I don't) and 7" springs (I don't) and 300lb rear springs (I don't) and a heavier NB miata (I don't)... So I don't know how comparable this is. He's also running .5" higher so probably a bunch of preload. But his helpers look fully bound to me and he seems to be pretty happy with it.

Essentially, I don't know what my suspension is really doing and I think only a good video with my application will tell me.
Joe Mauch is offline   Reply With Quote
Old 05-29-2012, 03:54 AM   #43
Junior Member
 
Join Date: Dec 2010
Location: UK, in Cambridgeshire or wherever work takes me.
Posts: 376
Total Cats: 19
Default

"I assume the helpers are working though because when I jack up the rear they do expand about half way"
Sounds all good to me then! I thought you meant they remained bound in droop, like the ones in the video.

I'm seriously leaning towards using FM-type spacers not just to jack my car up so the bloody low sump clears speedbumps, but to ensure I use minimal preload to get the helpers working as they should. Could be tested by just jacking up the car and seeing if the helpers extend. If they don't, use less preload and more spacers.
owenwilliams is offline   Reply With Quote
Old 05-29-2012, 03:56 AM   #44
Junior Member
 
Join Date: Sep 2009
Location: Bergen, Norway
Posts: 129
Total Cats: 12
Default

Quote:
Originally Posted by Joe Mauch View Post
When the car is static, yes. I assume the helpers are working though because when I jack up the rear they do expand about half way, so I assume when I go over a bump they do their job and shove the tire back into the ground to keep that contact patch.

The only video i've found of the rear suspension in action is this. Looks like he has an aftermarket sway bar in the rear (I don't) and 7" springs (I don't) and 300lb rear springs (I don't) and a heavier NB miata (I don't)... So I don't know how comparable this is. He's also running .5" higher so probably a bunch of preload. But his helpers look fully bound to me and he seems to be pretty happy with it.

Essentially, I don't know what my suspension is really doing and I think only a good video with my application will tell me.
Thats my video which I did to verify the movement, no spring bind and that the helper stayed bound during operation. So basically in the video the helpers are acting as springs spacers and expensive ones at that...
At the time I was running 7" 350lbs springs, the extra bushing, and preloaded the helper about 1\3 down at full droop. Swaybar is oem MSM.
I have since gone back to 6" 350lbs springs, extra bushing, FM spacers and made my own spring centering setup that effectively extends the springs by about 1\3 of an inch. I am very happy now. I have good height, preloaded the helpers about half way down at full droop and the perches are no longer close to the axles like with the 7" springs.

Car feels perfect now. I will make another video to check movement when I get the chance.
lassi is offline   Reply With Quote
Old 05-29-2012, 04:06 AM   #45
Junior Member
 
Join Date: Sep 2009
Location: Bergen, Norway
Posts: 129
Total Cats: 12
Default

My take on the spring centering issue. They center on the washer on the shaft and are made so they do not contact the shock body at full compression. (If the bump stop should fail...)



And fully loaded before it went back into the car. I had to give it slightly more preload to get my desired ride height.

Attached Thumbnails
XIDA coil overs installed- I'd like to raise the car a bit-6_g.sized.jpg   XIDA coil overs installed- I'd like to raise the car a bit-7_g.sized.jpg  
lassi is offline   Reply With Quote
Old 05-29-2012, 04:45 AM   #46
Senior Member
iTrader: (4)
 
mr_hyde's Avatar
 
Join Date: Jul 2009
Location: Seattle
Posts: 799
Total Cats: 25
Default

The MSM was the heaviest NA/NB made and mine had well over 100# of added braces. With the perches run all the way up to the very top, I had to be careful getting out of the parking garage at work and often times used my frame rails as skid plates. My Xidas are now on the track car which is 95% stripped. It should be under 2,100 dry but I haven't weighed it. In that configuration, I'm still coil bound in the rear but just barely on similar ride heights. Being that low is fine (preferable) for the track car.

I don't know if there are any geometrical differences but everything that can be bolted on the rear of the chassis is from an MSM.
mr_hyde is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Prepping my '95 for track asmasm Build Threads 82 05-26-2016 05:37 PM
Re-Spring Tein FLEX or replace? Mazdaspeeder Suspension, Brakes, Drivetrain 21 10-03-2015 07:45 PM
Help multi issues here! ReallyRottenTurbo MEGAsquirt 4 09-22-2015 01:49 PM
High-lift cams, SUB, new valve job = lifter tick? Der_Idiot Engine Performance 14 09-16-2015 10:30 PM
New here, saying hi, here's what I'm workin with. SuperSneakySecretSquirrel Meet and Greet 5 09-06-2015 09:30 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:37 AM.