Even if you feed the v10 enough air it would not take it. As you said, limitations are his breathing- there’s not enough volume to flow trough the tiny passages cast in the head. Hot air behaves in a completely weird way when under pressure- fluid mechanics is wonderful if you care to look ! From that reason alone a 4 valve per cyl, boosted CR engine v6 or v8 is a lot more potent than any v10-v12, not only limitations but parasitic drag trough the system as well ! Also with massive boost long cranks tend to flex a lot and creates a lot of problems with harmonics- in NA form they are awesome smooth power plants !
Apples to apples but I would prefer a short boosted 3/4 cyl engine boosted than a large, gas guzzling engine...I know you guys live in ‘murica where there’s no replacement for displacement but we here are constrained by euro regulations and limitations by design...
I agree that you don't need more than 400hp, and you don't need more than 2.0L to accomplish that. With that said, I don't find 4 or 8 cylinder engines exciting. If there were an optimized 2L 10-, 12-, or 16-cylinder engine, I'd go for that. As far as what's available, nobody, be they Brit or otherwise, has produced such an engine at a production scale.
With regards to the longer crankshaft, yes it's more likely to bend depending on the application, but all things being equal it's also less likely to shear/break. Also, regardless of valves, the V10 could handle and support >1,000hp relatively easy. With forced induction, the number of valves per cylider affects the efficiency not so much the maximum power. Valves typically become a significant limiting factor for generating power only at the extremes (e.g., a 1,000hp 2L 4-cylinder engine, 2,500hp Viper V10 [2 valves per cylinder], etc.). That said, this back and forth doesn't have to do with the thread.
Personally i chose v8tdi and next project will be with V12tdi.
My v8tdi is close to (if not more, yet to be dynoed) 600hp and 1200Nm. You could go after even higher hp. Its commonrail engine and imo very tunable. With V12 its the same, just 4 extra cylinders so 1000+ hp can be made. There are 2 projects that i know of, Darkside and one other who have goals set around 800-1000hp with the v12tdi.
Nice, Altz. The V8 TDI looks to be like a very solid engine!