Gents:
The numbers I was given for the PBR VH40 (5/8" bore) are apparently hydraulic
inlet pressure. I have no idea as to parameters. 450 in, 1470 out - for a
boost ratio of (approx.) 3:25. Similar calculations for the other boosters.
I am becoming more curious as well, and may follow up with the supplier so as
to understand the whole thing better. I was reading from my 'on the 'phone
notes' of a few months ago.
Earl
----- Original Message -----
From: andy pole
To: bspidell@comcast.net ; kags@shaw.ca
Cc: healeys@autox.team.net
Sent: Thursday, August 20, 2009 10:06 AM
Subject: RE: [Healeys] Girling brake boost ratio
Earl, Bob
Has made me wonder as well.
I had my original bj8 girling mk2a booster rebuilt by Past Parts lts here in
the uk.
The test figures they supplied for the rebuilt unit are:
primary
bar = 20
vacuum = 24
boost = 3:1
secondary
bar = -
inhg = -
bar = 58
These figures show the boost is stated as 3:1 and the difference in pressure
readings on primary and secondary (bar) are more like a ratio of 2.9:1
I believe the later girling mk2b had varying ratios from 2.75:1 and 2:1 with
the powerstop at 1.5:1
Have not tested mine on the road as still dont have the prop shaft fitted.
hope this helps
cheers Andy
-----------------------------------------------------------------------------
-
Celebrate a decade of Messenger with free winks, emoticons, display pics,
and more. Get Them Now
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
http://www.team.net/archive
|