Quote:
Originally Posted by robbo mcs
Actually there is some truth in this. If you look at the intakes on BMW DI cars that are dedicated racecars, they are usually completely clean without carbon build up. The constant higher rpms mean the valves are moving faster, which combined with higher heat levels help keep them clean. Also they have less cold start cycles.
However, a,street car, no matter how hard it is driven does not see these kind of operating conditions.
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Ok, and how often are those engines tore down and rebuilt? Different fuel, etc.
You can't compare a race engine and a street engine. A street DI engine is going to have carbon buildup.