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Tuning turbo engines. "A lot of hot air." What is a turbo. If you go back to your childhood you […]
Ceramic exhaust coatings and exhaust wraps![](https://www.carref.com/cms_admin/images/ceramic-exhaust-266x114.jpg)
Under bonnet temperatures are one of the biggest performance killers around.
Quite simply, you want your engine to be sucking in cold air as this carries more oxygen and will allow you to burn more fuel.
The exhaust system is one of the contributors to under bonnet temperatures. You can therefore lag the exhaust to help prevent this heat soak into the engine bay.
Particulate filters and FAP Performance gains.![](https://www.carref.com/cms_admin/images/hdi-engine-266x114.jpg)
The particulate filter is a stand alone unit. It is located upstream of the cat in the exhaust system and its purpose is to remove soot particles from the gas stream. The cat the proceeds to do its usual job of converting CO to CO2 and is in no way dependent or relied upon by the particulate filter.
In diesels the cats are two way devices and run in unregulated mode (ie. no O2 sensor like a petrol car).
Alloy wheels and their impact on handling and performance.![](https://www.carref.com/cms_admin/images/tsw-alloys-266x114.jpg)
Some rally style alloy wheels are lighter – (less weight = more speed) and also are designed to increase the cooling of the brake disks.
Some designs hold up better to being curbed than others and some break very easily when hitting a pothole or curb at speed.
Always go for the best quality alloy wheel that you can afford and read the reports and reviews. If you do go for a different overall size you must get the suspension and tracking realigned to avoid uneven wear under acceleration.