This is a clearance issue. Colds starts would require more clearances generally. Probably require higher hot oil viscosities and/or variable rate oil pumps. Easy enough to do, but a loss of some power.g-force_addict wrote:This would make engine technologies more road car related.
g-force_addict wrote: This would make engine technologies more road car related.
^agree. The Prius even has some kind of warm-water reservoir that stores coolant heat up to three days to avoid cold starting. So why make F1 road-car relevant when production cars can be more F1-relevant?Dragonfly wrote:If not anything else, cold engines pollute the environment more than engines working at normal temperature.
Also it's irrelevant to try to compare a standard road car engine to a tuned up to the limit F1 racing one.
I know it's a dream now, but I like itelmerfud wrote:nah man! bring back qualifying motors that hit the dust bin after 1hr, more exotic is NICE!!!
Interesting. If there is an interference fit between cylinder and piston at ambient temp, this implies the pistons must be assembled into the engine when the block and pistons are warm (~50C).Lurk wrote:Renault recently reveals some F1 engine particularity on a public web note (maybe it was only in french?). They said that F1 engine cannot do cold start physically. Piston is slightly oval while cylinder is round and so the piston is stucked in the cylinder. When heated up & due to thermal dilatation, piston & cylinder get their "working" shapes and engine can be started. If I remember well, minimum temperature was 50°C.
A shame the website I saw it do not keep a lot of archives, I cannot retrieve it
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