Date:         Sat, 3 Apr 2010 11:53:45 -0700
Reply-To:     Alistair Bell <albell@SHAW.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@SHAW.CA>
Subject:      Re: VC fluid - take a chance on this
Comments: To: mark drillock <mdrillock@COX.NET>
In-Reply-To:  <4BB78479.508@cox.net>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

we have to make some assumptions on the little data we can find.

first, we can find test results from vc rebuilders that show toque vs
fluid temp (I believe the temp to be a related but not critical
component of this test, it does however, show a graph that can be
compared with others)

see this graph for a "broken" vc

http://shufti.files.wordpress.com/2010/04/oldvc.jpg

see how toque value not much more than 60 nm


then a refurbed vc;

http://shufti.files.wordpress.com/2010/04/refurbishedvc.jpg

see how transferred toque now around 250 nm


this is with vc input/output diff of 75 rpm. See this pic of
australian subaru tuner testing torque value of a vc

http://web.archive.org/web/20080730134953/http://
us1.webpublications.com.au/static/images/articles/i1082/108266_4lo.jpg

so, my proposal Mark...

take one of your used vcs, open drain port(s), drain old fluid and
wash out with some sort of solvent, drain. Measure volume of vc by
adding some fluid (perhaps kerosene?), either measure volume used to
fill, or do by weight and compensate for density difference between
kerosene and siloxane.

fill with siloxane, compensating for air fill percentage. reseal and
test on lathe. you may have to make some sort of jig to hold vc on
lathe. test at 75 rpm. see how close you get to 250 nm :)

Its all theoretical right now, but its a fun project and if the
siloxane can be had for 7.20 a pop, what the heck, eh?

alistair











so I propose that one




On 3-Apr-10, at 11:10 AM, mark drillock wrote:

Ok, what is this test procedure and what are the performance specs
expected under the test?

Mark


Alistair Bell wrote:

>
> -you can test function on a lathe after refilling
>
>
> alistair
>
>
>