Mangoletsi specialised in many "bolt on"
conversion kits for a wide range of family cars. Giving
them, better performance and making them more desirable with
younger drivers. Therefore they developed a GT bolt on kit
for the 1100. It was designed to keep the cars natural
smoothness, while at the same time boosting performance.
This kit was intended for everyday motoring and was ideally
placed on the motorway.
Work on the engine was confined to the
cylinder head and breathing. The head kept its original
valve sizes, with the seats ground to a radius for smooth
and improved gas flow. The valves springs strength was
increased by 15% allowing the engine to rev more for higher
speeds. For smoother running, the combustion chambers were
equalized, slightly reshaped and highly polished. On the
breathing side, Mangoletsi's own small bore manifold was
used, combined with a special exhaust manifold and large
bore exhaust system. The cylinder head face was then ground
down to increase the compression ratio from the standard
8.5:1 up to 9.4:1.
The normal SU HS2 carburettor was replaced with a single
Solex automatic twin-choke instrument. To keep the car
tractable in traffic, with lots of low speed torque, the
choke sizes were limited to 20 and 22mm. This meant that
there was some loss of power at the top end of the rev
range. Mangoletsi indicated that their conversion kit
develops 64.5 b.h.p
at 5,100 r.p.m compared to 48 b.h.p of the standard car.