Uprated heater matrix for an MGBV8
Geoff Hall (Glacier White 1919) from Derbyshire posted a message
on the V8 Bulletin Board seeking help with uprated heater matrices
MGBGTV8. Keith Rowson (Teal Blue 2383) from Hertfordshire and Roger
Parker (Green 4092) the well-known MGBV8 guru posted replies.
Geoff's note posted on the bulletin board said "Has
anyone fitted an uprated heater matrix to their MGBV8? Do they work
without uprating the fan as well?".
Rowson responded "I have not fitted an uprated matrix myself
as I must say I find the standard item more than adequate, even
in the depths of winter. In the summer, there is way too much heat
from the engine anyhow. However fitting an uprated fan can give
you a slightly increased volume of air through the system. I think
Doug Smith at MG Motorsport supplies them, so why not contact him
or visit their useful website at www.mgmotorsport.com
to follow up".
Register - MG Car Club
Roger Parker also responded with "It's interesting
to note that some cars, especially GTs have heaters that actually
work whilst others are so poor by comparison you would expect
a fault, but not be able to find one. Uprated heater matrices
do allow more water to flow through the matrix, but the main issue
is the ½ inch (12mm) bore of the connection hoses and of
particular note is the MGB heater valve. Note that with the valve
on the V8, only the angle of the top is changed from the four
cylinder application but the flow is still not brilliant".
the best improvements come from utilising the better potential
water flow from the V8 which is normally connected to a larger
5/8 inch (16mm) bore hose and mate this to a matrix with an improved
flow. This means using some different parts including a suitable
sized tap suspended in the feed hose, similar to RV8 but is known
to work well. Also ensure that the internal foam "gasket"
that surrounds the matrix is not rotted away so maximising the
airflow passing through the core and not around the sides. Air
going round the outside of the matrix is not being heated!"