Notices
Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...
Sponsored by:
Sponsored by: 949 Racing

Xidas rubbing on FUCA! HELP!

Thread Tools
 
Search this Thread
 
Old Jul 11, 2018 | 12:55 PM
  #21  
concealer404's Avatar
Elite Member
iTrader: (3)
 
Joined: Aug 2011
Posts: 10,917
Total Cats: 2,206
Default

I did notice that the bumpstops supplied were much softer than what i was using on my old Bilstein setup, but didn't really stop to think what that meant at the time, because i wasn't really focusing on that car.
Old Jul 11, 2018 | 01:20 PM
  #22  
concealer404's Avatar
Elite Member
iTrader: (3)
 
Joined: Aug 2011
Posts: 10,917
Total Cats: 2,206
Default

Have you talked to your pro suspension builder?
Old Jul 11, 2018 | 01:24 PM
  #23  
sixshooter's Avatar
Moderator
iTrader: (12)
 
Joined: Nov 2008
Posts: 22,157
Total Cats: 3,538
From: Tampa, Florida
Default

Bump stops come in different hardnesses and heights. Ride heights are adjustable too. So are springs and damping. You are buying an aftermarket off-road, race product. It will require you to tailor it to your particular needs. It probably works just fine on many cars the way it is.

The rubbing is a bad thing, but complaining about the bump stops is like plugging in a megasquirt and expecting it to be perfect with the base map.
Old Jul 11, 2018 | 01:25 PM
  #24  
Ryan_G's Avatar
Elite Member
iTrader: (8)
 
Joined: Jan 2012
Posts: 2,568
Total Cats: 217
From: Tampa, Florida
Default

Originally Posted by concealer404
but didn't really stop to think what that meant at the time, because i wasn't really focusing on that car.
You were more focused on much bigger things like what happens when you lean hard on one side and then let go.
Old Jul 11, 2018 | 01:29 PM
  #25  
concealer404's Avatar
Elite Member
iTrader: (3)
 
Joined: Aug 2011
Posts: 10,917
Total Cats: 2,206
Default

Originally Posted by sixshooter
Bump stops come in different hardnesses and heights. Ride heights are adjustable too. So are springs and damping. You are buying an aftermarket off-road, race product. It will require you to tailor it to your particular needs. It probably works just fine on many cars the way it is.

The rubbing is a bad thing, but complaining about the bump stops is like plugging in a megasquirt and expecting it to be perfect with the base map.
Bump stops are independent of ride height. It's reasonable to expect that stops provided for a coilover system that is tailored for a specific chassis within a normal range of spring rates would do what they're supposed to do.

The amount of rubbing here may not be a bad thing and may be working as intended, but George is not outside the realm that the supplied bumpstops would still be expected to work properly. No work/tailoring should be necessary.
Old Jul 11, 2018 | 02:43 PM
  #26  
icantlearn's Avatar
Thread Starter
Elite Member
 
Joined: Sep 2015
Posts: 1,939
Total Cats: 118
From: San Jose, CA
Default

^ that. You cannot adjust shock body height with xidas. So they should have hit the bump stop way earlier/had a stiffer bump stop. There is only preload adjustment, so if you are in the area of a race/performance ride height, you will be in the bump stops a lot. There is nothing I can do except go up in spring rate to keep me off the bump stops. They just should have been made so that the "hard limit" (max compression) is just before tire contact. Simple as that.
Old Jul 11, 2018 | 02:59 PM
  #27  
emilio700's Avatar
Supporting Vendor
iTrader: (3)
 
Joined: May 2005
Posts: 7,622
Total Cats: 2,619
Default

Originally Posted by MiataMan00
They just should have been made so that the "hard limit" (max compression) is just before tire contact. Simple as that.
Nope. We have found it faster to run the shocks the way we ship them. Our competition record stands for itself. You are however, welcome to experiment with taller or higher durometer bump stops.
Making a car faster is always a process of experimentation. We did that, engineered Xida Race from scratch. Nothing in that assembly is an oversight or accident.

You need stiffer springs. I'd suggest 1100/500.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.33 SNR
Reply
Leave a poscat -7 Leave a negcat
Old Jul 11, 2018 | 03:01 PM
  #28  
icantlearn's Avatar
Thread Starter
Elite Member
 
Joined: Sep 2015
Posts: 1,939
Total Cats: 118
From: San Jose, CA
Default

I would like to see data backing that up. I find it hard to believe that stuffing a tire in a fender is faster than not doing so.
Old Jul 11, 2018 | 03:12 PM
  #29  
albumleaf's Avatar
Senior Member
iTrader: (7)
 
Joined: Sep 2007
Posts: 1,151
Total Cats: 92
Default

bad joke~~~~
Old Jul 11, 2018 | 03:31 PM
  #30  
Padlock's Avatar
Senior Member
 
Joined: Jul 2014
Posts: 1,396
Total Cats: 749
From: Milwaukee, WI
Default

Originally Posted by MiataMan00
I would like to see data backing that up. I find it hard to believe that stuffing a tire in a fender is faster than not doing so.
If you have a stiffer spring like he's mentioning, your tire doesn't bump into fender.

Reply
Leave a poscat -2 Leave a negcat
Old Jul 11, 2018 | 03:40 PM
  #31  
icantlearn's Avatar
Thread Starter
Elite Member
 
Joined: Sep 2015
Posts: 1,939
Total Cats: 118
From: San Jose, CA
Default

but it shouldnt have the ability to do that. thats the thing. whats the point? its useless wheel travel that is only causing damage.
Old Jul 11, 2018 | 03:56 PM
  #32  
18psi's Avatar
VladiTuned
iTrader: (76)
 
Joined: Apr 2008
Posts: 35,821
Total Cats: 3,482
Default

Originally Posted by sixshooter
... is like plugging in a megasquirt and expecting it to be perfect with the base map.
WHAT??11!!oneoneone

hold the phones
Originally Posted by MiataMan00
but it shouldnt have the ability to do that. thats the thing. whats the point? its useless wheel travel that is only causing damage.
so they limit it and the next guy complains about the limited travel cause his car is higher and his tires are smaller? I dunno
Old Jul 11, 2018 | 04:09 PM
  #33  
icantlearn's Avatar
Thread Starter
Elite Member
 
Joined: Sep 2015
Posts: 1,939
Total Cats: 118
From: San Jose, CA
Default

That would not be the case. A higher ride height would give you more bump travel. You would still bottom the shock in the same exact place. if you were running a 205/50/15 you would hit the fender even sooner. im running a 40 sidewall.
Old Jul 11, 2018 | 04:16 PM
  #34  
aidandj's Avatar
SADFab Destructive Testing Engineer
iTrader: (5)
 
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Default

Your 40 sidewall is only 0.3" diameter smaller than a 205/50r15. So 0.15" earlier. Which is a negligible difference.
Old Jul 11, 2018 | 04:19 PM
  #35  
icantlearn's Avatar
Thread Starter
Elite Member
 
Joined: Sep 2015
Posts: 1,939
Total Cats: 118
From: San Jose, CA
Default

either way, you would still bottom the shock in the same place.
Old Jul 11, 2018 | 04:20 PM
  #36  
sixshooter's Avatar
Moderator
iTrader: (12)
 
Joined: Nov 2008
Posts: 22,157
Total Cats: 3,538
From: Tampa, Florida
Default

You have the race version and not the longer body street version?
Old Jul 11, 2018 | 04:22 PM
  #37  
aidandj's Avatar
SADFab Destructive Testing Engineer
iTrader: (5)
 
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Default

Every car is slightly different. A big of tire polishing your shock tower isn't bad. You are working with the tolerances of a "race car", not a street car.

You should always test the full travel of your wheel without bumpstops when making suspension changes.

There are a variety of factors that affect clearances when setting up a shock. Camber, ride height, ELBJ, which control arms, age of bushings. When working with something at the limit then you can't always build a "plug and play" product.

A xida is not much different in this area than any other shock body designed for a 2.25" spring. Any ohlin would do it, a Feal or a Fox might be worse due to 2.5" springs.

In the end it is up to the car builder to make sure that everything clears and functions correctly, not the vendor of a shock.
Old Jul 11, 2018 | 04:24 PM
  #38  
boileralum's Avatar
Senior Member
iTrader: (8)
 
Joined: Mar 2006
Posts: 1,108
Total Cats: 233
From: Indianapolis, IN
Default

What are your pinch weld heights set to, MiataMan00?
Old Jul 11, 2018 | 04:32 PM
  #39  
sixshooter's Avatar
Moderator
iTrader: (12)
 
Joined: Nov 2008
Posts: 22,157
Total Cats: 3,538
From: Tampa, Florida
Default

Originally Posted by aidandj

In the end it is up to the car builder to make sure that everything clears and functions correctly, not the vendor of a shock.
Don't you dare bring personal responsibility into this! How dare you!

He's running non-stock wheels and non stock tire size on a non stock suspension alignment, using full custom lower ball joints, and is complaining that his non-stock parts don't all fit together without touching anything like stock.

Yeah, it's Emilio's fault. Hahaha!
Old Jul 11, 2018 | 04:40 PM
  #40  
icantlearn's Avatar
Thread Starter
Elite Member
 
Joined: Sep 2015
Posts: 1,939
Total Cats: 118
From: San Jose, CA
Default

Originally Posted by sixshooter
You have the race version and not the longer body street version?
yes, race version

Originally Posted by aidandj
Every car is slightly different. A big of tire polishing your shock tower isn't bad. You are working with the tolerances of a "race car", not a street car.
If the tire is rubbing n the shock tower that IS bad. Race car, street car, it doesnt matter.

Originally Posted by aidandj
You should always test the full travel of your wheel without bumpstops when making suspension changes.

There are a variety of factors that affect clearances when setting up a shock. Camber, ride height, ELBJ, which control arms, age of bushings. When working with something at the limit then you can't always build a "plug and play" product.
There is no documentation saying that there might be an issue with contact between the shock body and other parts. Expecting hundreds or thousands of customers to do a stoke pass is not reasonable.

Originally Posted by aidandj
A xida is not much different in this area than any other shock body designed for a 2.25" spring. Any ohlin would do it, a Feal or a Fox might be worse due to 2.5" springs.
Spring size has nothing to do with this

Originally Posted by aidandj
In the end it is up to the car builder to make sure that everything clears and functions correctly, not the vendor of a shock.
Exept when the vendor is tailoring the shock to work with your specific chassis, and gives you no shock body height adjustment. That just puts the customer in between a rock and a hard place.

Originally Posted by boileralum
What are your pinch weld heights set to, MiataMan00?
4.5 font, 4.75 rear.



All times are GMT -4. The time now is 10:37 AM.