The Turbo guides cover the factory intercooler and the water-cooled kits. The supercharged car has its own notes for the same kit.
Choosing
- Intercooler or charge cooler for a Turbo: what owners measured and chose
The long-running air-to-air versus water-cooled debate, boiled down to what owners actually logged (intake temperatures from 40°C to over 100°C), what the uprated units cost, why the ECU pulls power as the intake gets hot, and notes on the boost pipe sizes and routing.
Factory intercooler
- Intercooler replacement and hoses (Turbo)
The factory steps for replacing the Turbo's intercooler, the hoses between turbo, intercooler and throttle body, and the charge pressure sensor, from the Vauxhall TIS.
Charge cooler kits
- Pro Alloy charge cooler: fitting to a Turbo
A 2007 owner's step-by-step fit of the Pro Alloy / Courtenay charge cooler kit on a Turbo, with the fixings, fan wiring fixes and tips other owners added, and one owner's before-and-after intake temperatures. Supercharged cars have their own notes. - Turbo charge cooler kit: parts, hoses and fixings
The 2008 fitting notes for a Courtenay Sport Turbo charge cooler kit: what is in the kit, which hose goes where, the fixings, and where the parts go. The pump and fan wiring is in its own guide. - Charge cooler pump and fan wiring (Pro Alloy and Courtenay Turbo kits)
How to wire the charge cooler pump relay so it keeps running after shutdown, and the pre-rad Spal fans to the original plug, from the maker's 2008 fitting sheet and one owner's 2007 fit with corrections from others. Includes the blue and black fan wires that must be crossed. - Pro Alloy charge cooler kit on a supercharged car
What differs when the Pro Alloy / Courtenay kit goes on a supercharged (NA-based) car: no separate charge cooler unit, extra crash box work, the 2009 owners' ways through the sill, pump wiring from 2009 and 2015, and the order the water takes through the Laminova manifold.
Cooling circuit
- Turbo cooling circuit and track-day upgrades
One owner’s findings on how the Turbo’s cooling circuit actually flows, why it struggles on track and after shutdown, and the upgrades owners tried: an electric auxiliary pump, sealing the radiators, oil coolers and rerouting. These are individual experiments with little long-term data.