shorrock supercharger water jacket super rare c75b 142b

Never seen one of these before. I wonder how effective they are. The seller claims it to be a Shorrock original...

"hello and welcome to my auction for this origonal shorrock water jacket basically this goes in between the carburetta and the supercharger either the c75b or the 142b unit. this piece has 1 inlet and 1 outlet so water can flow round it. very very rare item and hard to find 1 of these now so complete your classic build by using origonal pieces ... thanks for looking

Question & Answer

Q:Please could you tell me the diameter of the hole in the middle and the distance between the stud holes.
A:The internal boar is 35mm... the 4 holes are the standard distance apart as on the shorrock inlet and outlet 50mm centre to centre...and the other 2 holes where i persume the carb would bolt on are 60mm centre to centre"

STARTING PRICE : £0.99
SOLD FOR : £137.00

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160401113935




UPDATE : Here's a photo courtesy of Paul Fleetwood of the water jacket fitted as part of a Shorrock instalation on an Ogle SX1000, a 1962 Mini based special -

Note also, the single groove pulley on the Shorrock.

Shorrock Supercharger Boost Gauge, MG, Ford, Mini

I once thought these were rare, but they seem to come up on eBay pretty regularly...

http://offer.ebay.co.uk/ws/eBayISAPI.dll?ViewBids&item=110490227908

STARTING PRICE : £0.99
CURRENT BID : £5.50