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I had thought that running two turbos off of 1 pipe would cause a lag in spool time. My reasoning for this is one of the formulas originally stated. For finding the pressure and volume of gas pushing each turbo would be
P1 x V1 = P2 x V2
P(exhaust) x V (exhaust) = ([P(turbo1) x V(turbo1)] + [P(turbo2) x V(turbo2)])
I get lost here though. If I understand Grumpys post correctly, The temperature is what is responsible for spool time. Even if that is the case, I still think that the pressure and the volume have to be considered. We see from the equation for gasses that
PV= nRT. Reordering this equation we get T= (PV)/nR ; V= (nRT)/P ; and P= (nRT)/V . Basically this states that Pressure Volume and Temperature can all be expressed as the relationship between the other variables.
All formulas aside, I was viewing it like this. Imagine a garden hose that splits into a T at the end, with each end of the T being a water wheel. If the radius of the T hose outlets are the same size as the T hose inlet, then if the inlet is flowing its max rate, each hose would still only be recieving half of the water.
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