cummins king wrote:okay that makes sence i just dont understand why some people put two of the same turbos on a truck instead of one smaller and one larger
on a cummins or any inline, they do it because they're uninformed and want to try something 'no one's done'...when you run two identical turbos, you now have the same amount of compressor capability with more mechanical efficiency loss. even though the individual turbo is much smaller than the big turbo, when you compare the mass of both turbos to the mass of the larger single, then figure you have the same amount of drive pressure/heat energy...
only reason twin parallel turbos are common is usually on a V8 car/truck where engine compartment space is a premium and it's easier to mount a smaller turbo off of either exhaust log, allowing individual downpipes near the factory location instead of one large DP on one side and to eliminate having to run an exhaust pipe across the engine and into a single turbo. so it's just for plumbing's sake on a V engine. on an inline, parallel 'twins' are dumb and useless. any of the turbo gods that I've researched that have dedicated their lives to speed and turbos have proved time and time again that a single turbo is mechanically more efficient than true parallel twins.
'93 250 4x4 NV4500, flatbed, club cab, ex brake, pump tweaked, too many new ideas thanks to you guys.
dubbed the "Mexican Mtn Goat"
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