Supercharger Porting Services - Supercharger Rebuild

Like any part of an engine’s intake system, superchargers can be given subtle enhancement to optimise airflow and increase engine efficiency and output. It is a great fallacy to think that supercharged engines don’t need cylinder head porting and flow optimisation on the inlet side – they benefit just as much as normally-aspirated engines, and that includes porting the supercharger.

Drive the car hard, and this leads to increase in the intercooler circuit cooling water temperature, increased inlet air temperature and reduced power. A supercharged Jaguar can lose 10-15bhp each time on back-to-back dyno runs because of this, and just driving a car hard on a track day or spirited drive will lead to a feeling of lost power – and it’s not just a feeling. Reducing this heat build allows you to enjoy the car more.

Realistic Gains

Eaton superchargers, good as they are and a great choice for road cars rather than race machines, do raise inlet charge air temperatures. While some companies across the Atlantic might claim 20-25bhp gains on a supercharged 4.2 Jaguar engine from porting the blower, we think 5-10bhp is more realistic, but the main benefit is reduced heat build-up in the intercooler water circuit.

Drive an Eaton-equipped car hard and the inlet air temperatures rise, in turn the water in the intercooler circuit get hotter, and this reduces inlet air cooling – a vicious downward spiral which leads to noticeable drop in power as the ECU retards ignition to compensate for increase inlet air temperature. You can feel the engine getting lethargic when this happens. Porting the supercharger reduces turbulence, inlet air heat build and in turn power drop. Absolute peak power gain my not be high, but power loss from heat build may be reduced by 20-30bhp.

M112 Supercharger Porting Services

We offer two levels of porting for Jaguar and Range Rover Eaton M112 superchargers starting at £175 for Stage 1 (as part of a supercharger rebuild), or Stage 2 at £275 which also includes blending of the throttle elbow which connects the supercharger to the throttle body and as standard is badly stepped.

Prices for other superchargers vary depending on model and required application, for more information telephone us and select Option 3 or email tuning@powerhouse.uk to discuss your supercharger porting requirements.

Preventative oil changes are very important on Eaton superchargers, as the ‘sealed for life’ only means sealed until after manufacturer’s warranty still applies! Although Eaton uses a high quality synthetic aviation turbine oil in its supercharger range, the oil is not indestructible and does oxidize gradually over years of exposure to high working temperatures.

After only 50,000 miles, the original oil can have degraded from the nice clear sample on the left to burnt-smelling brown soup like the right hand sample – not good for protecting the bearings and seals in your Eaton supercharger!

We have a range of rebuild services available for most of the Eaton supercharger types including M45, M62, M90, M112, M122 and TVS versions. Call us and select Option 3 to discuss your supercharger servicing requirements.