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6mtsedan
03-20-2015, 08:03 AM
I got my new shoes....18x8.5 Off38, 225/40 tires

The back end is rubbing on the fender liner. When this happens is the general concensus to raise the rear (on BC Coilovers) or to roll the fenders? I have approximately a finger between tire and Fender.

This is my car
http://img.photobucket.com/albums/v519/jakestcroix/IMG_0509.jpg

Aitch
03-20-2015, 08:29 AM
Well if it's rubbing on the fender liner, see if you can cut out the offending part. Rolling the fenders won't do a thing if that's not where the rubbing is occurring. I know there are a couple of bulges in the liner that can be trimmed out if need be.

6mtsedan
03-20-2015, 08:34 AM
I assume that its the fender liner. I'll have to take a close up pic of it to see for sure

Dave_The_BMXER
03-20-2015, 09:52 AM
Find out what is rubbing.

If fender:
roll it.

If plastic:
a) let it work itself out
b) heat gun, push, repeat
c) cut/remove.

6mtsedan
03-20-2015, 10:09 AM
Find out what is rubbing.

If fender:
roll it.

If plastic:
a) let it work itself out
b) heat gun, push, repeat
c) cut/remove.

Only problem was the tires were stinking and smoking just after a little drive around the block

Aitch
03-20-2015, 10:53 AM
Yeah I found the 2nd gen rear fender tends to burn a fair amount of rubber while clearancing itself. Hence the trimming.

6mtsedan
03-20-2015, 10:56 AM
Yeah I found the 2nd gen rear fender tends to burn a fair amount of rubber while clearancing itself. Hence the trimming.

Should I take off the tires and see if there are rub marks?

Aitch
03-20-2015, 11:31 AM
Sure. I'm expecting you're rubbing on a tab covering a screw at about the 2 o'clock position looking at the driver's rear wheel.

GWN
03-20-2015, 11:37 PM
put tape on your fender, drive a bit, see where the tape rubs off

or, do what I did. CHOP EVERYTHING

EDIT: also, if you're gonna drive slammed, might wanna get rid of the flaps! they will drag and be annoying

6mtsedan
03-22-2015, 12:10 PM
http://img.photobucket.com/albums/v519/jakestcroix/DSC_8508.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8508.jpg.html)http://img.photobucket.com/albums/v519/jakestcroix/DSC_8507.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8507.jpg.html)http://img.photobucket.com/albums/v519/jakestcroix/DSC_8513.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8513.jpg.html)http://img.photobucket.com/albums/v519/jakestcroix/DSC_8513.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8513.jpg.html)

6mtsedan
03-22-2015, 12:13 PM
http://img.photobucket.com/albums/v519/jakestcroix/DSC_8505.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8505.jpg.html)

Flaps are definately coming off. Had them on the last year but now they are just annoying. Looks like i need to first do some fine tuning to my suspension as my measurements are way off and I haven't had it adjusted in over 2 years.
Does anyone know how hard it is to adjust the rears on the BC System?

FD22
03-22-2015, 02:09 PM
Does anyone know how hard it is to adjust the rears on the BC System?

Depending on how your perch was setup on the initial install (on top or on bottom) it may be tricky. Otherwise, not much different of a procedure from the fronts. Jack the car up, get the wheels off, and have at it with your little BC spanner tools

6mtsedan
03-22-2015, 02:12 PM
Depending on how your perch was setup on the initial install (on top or on bottom) it may be tricky. Otherwise, not much different of a procedure from the fronts. Jack the car up, get the wheels off, and have at it with your little BC spanner tools

give me a bit. Ill take another picture with the wheels off. My bloody nuts are freezing though

6mtsedan
03-22-2015, 03:02 PM
http://img.photobucket.com/albums/v519/jakestcroix/DSC_8514.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8514.jpg.html)http://img.photobucket.com/albums/v519/jakestcroix/DSC_8516.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8516.jpg.html)http://img.photobucket.com/albums/v519/jakestcroix/DSC_8515.jpg (http://smg.photobucket.com/user/jakestcroix/media/DSC_8515.jpg.html)

So which one raises the car???

FD22
03-22-2015, 03:09 PM
give me a bit. Ill take another picture with the wheels off. My bloody nuts are freezing though

Keeping them warm may not be your biggest concern with them right now..

haha


So which one raises the car???

Top picture; the silver rings towards the top of the threaded part that's visible between the two top coils of your spring. That's what you'll want to turn to raise the car.

6mtsedan
03-22-2015, 03:11 PM
Keeping them warm may not be your biggest concern with them right now..

haha



Top picture; the silver rings towards the top of the threaded part that's visible between the two top coils of your spring. That's what you'll want to turn to raise the car.

so showing more or less threads?

FD22
03-22-2015, 03:13 PM
so showing more or less threads?

If I'm not mistaken, the way you have it setup right now, you'll want less threads to be shown underneath the rings, and more to be shown above the rings

6mtsedan
03-22-2015, 03:54 PM
I can't see any rings above right now (assuming thats slammed). Just warming up for a few minutes then going to try again. It seems really hard to get my hand in there. should i be jacking up the suspension to relieve the tension?

I took off the mudflap

FD22
03-22-2015, 04:06 PM
I can't see any rings above right now (assuming thats slammed). Just warming up for a few minutes then going to try again. It seems really hard to get my hand in there. should i be jacking up the suspension to relieve the tension?

I took off the mudflap

Yea I'd say you're pretty much at the lowest point already. Yup, when the perch is on top of the spring, clearance is a real pain in the ass. And no, you don't have to support the suspension. You can do it by just letting it hang freely.

6mtsedan
03-22-2015, 04:11 PM
how much space should i leave from the bottom of the threaded shaft?

measurements for the suspension (mind you i havent checked or adjusted since i installed over 2 years ago):
Drivers Front: 24 1/3"
Passenger Front: 24 1/2"
Driver Rear: 24 3/4"
Passenger Rear: 24"

I'm pretty sure the drivers rear was smoking and had alot less clearance then the passenger side.

FD22
03-22-2015, 04:46 PM
how much space should i leave from the bottom of the threaded shaft?

measurements for the suspension (mind you i havent checked or adjusted since i installed over 2 years ago):
Drivers Front: 24 1/3"
Passenger Front: 24 1/2"
Driver Rear: 24 3/4"
Passenger Rear: 24"

I'm pretty sure the drivers rear was smoking and had alot less clearance then the passenger side.

All depends how much higher you want/need to go. First figure out exactly what's rubbing, and see how much higher you gotta be to avoid it.

GWN
03-22-2015, 05:14 PM
You don't need to raise the car, you just need to roll your fenders a bit. Or just try the phone book

6mtsedan
03-22-2015, 05:47 PM
May just try to even out the back at 24 3/4" then do a fender roll. Front is easy to adjust but the rear is giving me some trouble.

fumoffu
03-22-2015, 06:53 PM
245/40r18 on 18x18.5 38 offset will slightly rub on stock height. Only rub on hard cornering.
225/40r18 on 18x18.5 38 offset with stock suspension would not rub at all
235/40r18 on 18x18.5 38 offset with BC coilver with 1.5 inch drop would not rub with -2.5 to -3 camber for the rear. Front -1.5 to -2.
225/40r18 on 18x18.5 38 offset with BC coilver with 1.5 inch drop would not rub with -2.5 to -3 camber for the rear. Front -1.5 to -2.
235/40r18 on 18x18.5 38 offset with BC coilver with 1.5 inch drop may rub with -2.5 camber for the rear. Front -2. Have to rolled the rear and but I don't think you need to cut the tab.
This was tested on 2013 Mazdaspeed 3. I go camping so I needed to setup some measurement and height.

225/40r18 on 18x18.5 38 offset with stock suspension would not rub
225/40r18 on 18x18.5 38 offset with BC coilver with 2-3 inch drop (cannot remember now. I know it will destroy oil pan) will rub with -3 camber for the rear. Front -2.
This was tested on 2009 Mazdaspeed 3

225/40r18 on 18x18.5 38 offset with stock suspension would not rub
225/40r18 on 18x18.5 38 offset with Koni Orange and racing beat spring. Will eat tires without fender or camber.

This was tested on 2006 MZ3

Also type of tires also play a role because certain manufactures had different sidewall design.