[Healeys] Girling brake boost ratio

[andy pole]

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

_________________________________________________________________

Upgrade to Internet Explorer 8 Optimised for MSN.

http://extras.uk.msn.com/internet-explorer-8/?ocid=T010MSN07A0716U