i was just wondering. the general rule of thumb seems to suggest keeping the intake plenum volume within 50%-75% of the engines displacment... so a 3.0 Liter should have a intake with a plenum volume of 1.5L-2.0L.

does anyone know of any downsides to a large plenum that is 125%-150% of the engine's displacment?

Matt scranton's celica drag car with a 3.0L had an intake with a plenum the size of a scuba tank... literally. it had to have been like 12L or something outrageous.

anyone have any info on this sort of thing?