Building the Supermarine Spitfire

Powerplant & Propeller

I have selected a GM V6 266HP engine. It has twin overhead cams with 24 valves, fitted with a MoTeC engine management system with fully sequential injection and ignition. The mixture control is automatic and controlled by the ECU. All primary sensor functions are duplicated and redundancy built in for all secondary functions. This will result in an increase in reliability. Engine torque will increase, fuel consumption will decrease and also a decrease in cruise thrust lever settings with no performance loss. The reduction ratio down from 1.7:1 to 1.6:1 as a result of the increased engine torque. The engine has been successfully run on a test bed to initialise the ECU. This will be coupled to a three bladed IVO electric variable pitch propeller.

I am going to upgrade the engine performance by adding a supercharger.

Power will increase to 310 hp @ 5200 rpm.

350 lbs/ft torque @ 4200 rpm.

595 lbs ft/torque at prop.

30 -32 litres/hour @ 65% thrust setting.

Watch this space for photos and other performance data.

Engine Mount for GM 3.5 V6 330HP engine

Here it is!

Test Stand

Hoisting the engine into position.

Fan Driver in place

Electric Variable Pitch Propeller Hub

Three Blade IVO Propeller

Exhaust Stacks

Air Filter

Thrust Lever Cable Connection

Engine Control Unit. Courtesy of MoTeC