I thought I would show how I mounted mine in the rear. It has been done before in the rear but I hung mine off of the swaybar instead of the frame. Of course there is no room for a spare with all the things I have going on back there.

 

Things tend to expand in the presence of heat.

You have a sealed, pressurized chamber there with
a pressure release valve (and a gauge with plastic
bits in very close proximity to both exhaust pipes.

Did you happen to see ghoffman's thread with thermal
imagery of passing cars on the track?

At the very least, consider adding provisions for a catch-can
to collect oil that dumps out of the pressure release.

.

 

Thermal images of Chris Ingle at Runoffs

 

Thanks for the tips. I had some concern about the gauge and heat but when the tire carrier is mounted it provides protection to at least half of the accusump. I could add to that and relocate the gauge again.

 

Here is how sza mounted his. The location appears very
similar to yours but by being horizontal, the accumulator
has more separation from the pipes. Of course, it no
longer has the slope recommended in the installation instructions.



Design Engineering (DEI) and Thermo-Tec both offer heat wrap products that
you could apply to either the accumulator, exhaust pipes or both.

You could monitor temperatures in the area with a
thermocouple or with Tempilstik heat indicating crayons
(available from welding supply houses)

 

Is the fabricated tubular 'H' bracket with the four pan head
screws a mount for the leading edge of the tire carrier?

If it is feasible to mount your accumulator longtitudinally, this would
appear to provide more separation from the exhaust pipes.

.

 

As I study yours and sza's mounting positions further, it looks
as though your pass side is near the position of sza's and your
driver side is a few inches higher.

The addition of the exhaust components changes the perspective.

I posted in the other thread that sza's arrangement looked good.
Now I wonder where his is in relation to his exhaust.

.

 

A quote from the Canton's installation document, "if possible, mount the tube with the oil end (the end with the oil valve) slightly higher than the air end."

I got my idea from that thread showing sza's picture. His mount may be directly over the exhaust whereas mine is further back.

My H bracket is for rear support for the tire carrier. Below is how is looks all together.

 

You could also wrap the exhaust pipes with header wrap. Got it on the road yet?

 

Well, it is the 'rear' of the carrier when you look at it from the rear of the
car, but technically it is really the front or leading edge of the carrier.

Enough quibbling ...

ericcer, the package looks great. Very stealthy the way the cut-outs
and their tail pipes are tucked up under the former tire carrier. The
carrier has to be worth some aero points, too.

Your method of mounting the accumulator achieves the aim of canting
to help minimize entrained air. (I'm unsure whether attaching it to
the sway bar will induce twist in the cylinder, but if it does, then you
can fabricate a bracket that attaches like sza's but which positions
the cylinder as you already have it.)

It is just the question of whether heat will be an issue. I do not
have first-hand knowledge that it WILL be, I am just commenting
on a possibility.

How about posting in AutoX & RR to get input from the folks like
Vetracr, h rocks and others who already have their accumulators
in the rear. They'll be able to steer you in the right direction.

.

 

Another thought that has been on my mind is the possibility
that the accumulator will rotate fore/aft on the sway bar.
(If it can do this then there is also a chance it may move
laterally as it swings to/fro.)

One of my 2 quart accumulators scales at a weight of about
eight pounds empty. A quart of oil weighs about 2 lbs (4
Gallons of Royal Purple weighs 32 pounds). Add some fittings
and some hose, along with the clamps and the bracket and
you can see that there is a bit of mass suspended like a
pendulum under the sway bar.

My vote is that a 3qt unit and its hardware weighs 20lbs or more.
Then there is the added leverage due to the distance between
the cylinder and the bar.

Do you have other brackets restraining the cylinder or just
the ones that suspend it from the bar? You may find that the
clamping force of the straps will not be sufficient to keep the
accumulator in the location you want it to stay in. If you push
hard on it with your hand, will it move?

If it turns out that the cylinder can move as is, it would not
be too difficult to modify your mount to attach solidly like
sza's. Are there existing OEM attachment points that you
could use on the crossmember just ahead of where your
accumulator is located now? A little more fabrication and
you would be in busness.

.

 

This was a concern for me too.. it's mounted on a bar that rotates as suspension moves up and down...