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Gearbox – Lower ratios give better acceleration times and lower fuel economy. Six or seven speed boxes are better matched to modern engines.
Most street applications are closer 1st and 2nd gear ratios for that off the line 0-60 boost or for the fast exec a lower 2nd and 3rd ratio give improved overtaking flexibility and 30 – 70 mph acceleration with a high 4th and 5th gear to give motorway fuel economy.
Fuel and fuel additives octane and pressure boost valves.
Choice of fuel becomes more critical in a high compression or turbo engine. "One of my Pet(rol) hates!" Fuel: this […]
Diesels? On Torquecars, Really?
Can 'Diesel' Really Be Part of Our Vocabulary? "2007 – The Year Of The Diesel Hot Hatch" Looking forward to […]
Blow off valves, dump valves and screamer pipes
Blow off valves and dump valves.
When the throttle is closed (when you lift off the accelerator) in a turbo driven engine there is a build up of pressure as forced air is still coming from the turbo. Lifting off the throttle is a lot like putting a plug in the sink – the flow through is stopped and water would just build up and overflow the sink.
