Quote Originally Posted by monaroCountry View Post
Using ricer mentality that many here seem to love when bagging pushrods..........the Veyron needs 4 turbos and 8 odd L to achieve a measly 1000hp.

Now the turbo rule as used in most racing clubs of 1.5 (per turbo) x 4 (for the 4 turbos used in the Bugatti) + 8 (for engine displacement). So what you have is 14L to achieve 1000hp........which is 71.43hp per litre. The Ultima GTR640 on the other hand using the humble 6.2L Chev engine pumps out a stunning 640hp without forced induction, this equates to 103hp per litre.

If you take this further and even the two engines out by adding an extra 7.8L for the Ultima to equal the Bugattis 14L total capacity then you get a monsterous 640hp + (7.8 x 103)hp = 640hp + 803.4hp = 1443.4hp
Sorry but that is just utter BS... if you think that arguement has any real value then you have some serious problems.

First the Bugatti engine is an 8L W16 Quad Turbo (so you sorta got that right )

Next: About your ridiculous displacement guestimate... To find the equivalent displacement produced by the turbochargers you follow a simple calculation (that you will probably find at those racing clubs )

Seeing as you don't know what the formula is I will tell you...

Ready...?

Here it is: Engine's Volumetric Efficiency in a decimal value (ie 75% = 0.75) multiply that by the static displacement (in any unit so long as you maintain the chosen unit of volume) We will call this value True Displacement Part 1 (TDP1)

Now take the absolute pressure in the manifold and divide it by the atmospheric pressure (you may assume atmospheric pressure to be 14.7 PSI or 101KPa ect.) We will call this value True Displacement Part 2 (TDP2)

Now here comes the tricky part.....


ready...?

TDP1 X TDP2 = equivalent displacement

The number of turboes is irrelevant.

Also what is amazing about a race tuned engine making slightly over 100HP/L stock hondas do much better...

HP/L is also not a measure of efficiency.