HAT TRICK
The Enderle hat looks set up
for mechanical injection, but
Shannon actually runs full
sequential EFI in his 253 to
allow for more control over
ignition and fuelling in the
motor. He has also hidden two
Bosch 1000cc injectors in the
hat to mist methanol onto the
supercharger rotor pack below
HAT TRICK
The Enderle hat looks set up
for mechanical injection, but
Shannon actually runs full
sequential EFI in his 253 to
allow for more control over
ignition and fuelling in the
motor. He has also hidden two
Bosch 1000cc injectors in the
hat to mist methanol onto the
supercharger rotor pack below
“Fuel is supplied
through a –8 fuel line,
running dead-head,”
says Shannon. The dead-
head system is simplicity
itself, as it does away with
the need for a
return lineSHANNON HERAUD
HOLDEN 253CI BLUE-BLOCK V8Power: 600hp@7000rpm
Boost: 9psi
Inlet: Custom Redline tunnel ram
Blower: GM 4/71
ECU: Autronic SM4
Crank: Holden blue 253
Conrods: Scat forged H-beam
Pistons: JE forged
Compression ratio: 9.0:1
Heads: HQ red castings, hand-ported
Valves: Stainless, oversized
Camshaft: Custom Clive Cams
Lifters: Crane Cams EDM small-block
Chev
Pushrods: Trend^3 / 8 in
Rockers: Jesel Sportsman shaft-mount
Oil system: Barnes Systems four-stage
dry-sump pump, custom oil pan
Fuel system: Bosch 1000cc injectors
(x10)
Fuel type: Methanol
Cooling: Custom brass/copper three-
core radiator
Exhaust: 17 / 8 in primaries, 3.5in
collectors, custom-made
Ignition: Autronic CDI