okay umm i know im going to be flammed for this but i been wondering so w/e. I havent seen any v12 boxer engines .. is it possible or been made? also what are benifits of twin turbos or single(with different sizes too)? which has more acceleration(low end and top end). im a noob and i gotta learn. id google/research but not very clear answers..
well first off, boxer engines arent v engines, secondly, if a 4 cylinder boxer displaces up to 2.5liters, the displacement on a 12 cylinder would be retarded. That plus the fact that to actually make a space big enough to fit a 12 cylinder boxer would be almost impossible. look up twin turbo under google, it will explain the concept. essentially having 2 smaller turbos allows faster spool time, but is less efficient in the high end as one large compressor wheel. tons of useful info in here: http://en.wikipedia.org/wiki/Turbocharger
Flat 12's have been used in some high end cars of old and in some heavy machinery. Basically because the have a lower cg and do not take up much vertical space. Therefore the vehicle can be smaller in height. http://en.wikipedia.org/wiki/Flat-12
subaru made a few(seriously like a FEW) boxer 12's for F1 car racing, but the motors were extremely unreliable and sketchy, the cars never even finished a race
C'mon, one of the greatest race cars of all time used a flat 12. The Porsche 917: http://en.wikipedia.org/wiki/Porsche_917
IIRC they did finish races. The problem was not a mechanical issue. Since the motor is a stressed member (motor bolted to the tub and the transmission/suspension bolted to the other end of the motor) of the chassis. They had issues with flex in the car, the flex would weaken the motor and it would fail from the torsional stress. Renault had the same issues when they did there 130? degree V-10. Then went back to a smaller included angle for the added rigidity.
I remember reading that they were trying to lower the CG height with the boxer motor, but since the exhaust has to come out the bottom, it didn't make much of a difference.