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That's what people need to realise.

You are limited by valve surface area. I'd say 1400hp out of 1.5L is about the limit. Although one big advance over the past 15 years has been in metallurgy which has allowed bigger bores and smaller strokes. Look at slipper pistons, especially as now used in motorbikes. That said, I'd say efficiency rather than outright power is where the big advances have lead us.

It is the limit WITHIN FIA regulations. Remember there are huge amounts of metals and compounds that are banned for use in engines and racing in general due to many reasons. Also adaptive engine systems have been banned for years, like adjustable intakes. Whilst there is little incentive, I would expect it to be possible to get more then the 1hp per cc.

There is a limit on the fuel and overall basic design of a 4 stroke engine but don't jump to conclusions about its limits so soon.

The current problem is the "green movement". Especially F1 has been moving to try and promote this green energy/green image crap which is taking money away from engine development and putting it towards useless stuff like kers.

(important for society but racing should focus on mechanical engines only)

If they ignored such things and removed a lot of the restrictions on engines and fuels, you could expect to see some amazing engine with even more insane power levels.

Remember 24 years since turbo F1 cars. That is a long time. Even if development has been focused in other areas.

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Good point. But i think the most developement in engines (especially F1) has been around reliability. They have already proved you can get stupid power out of small capacity engines. But gone are the good old days of engines exploding regularly in an F1 race. Even in the last 5 years. You hardly ever see it any more.

It's been about cost and safety too. They don't want insanely powerful cars as in the turbo era (except more so), and they don't want it to be too expensive so the wealthiest teams dominate.

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