centrifugal boost question
Thread Starter
Joined: Oct 2007
Posts: 604
Likes: 1
From: Gainesville FL
centrifugal boost question If a 416 makes 18psi and u use the same blower on a 408 and a 370 how much psi would the blower make if it was spun at the same rpm on a 3 motors . lol what would be the psi on 408 and the 370 .
that is a massive math problem.
pressure is the resistance to flow.
each of those engines flow differently on an efficiency scale.
Its like taking a stock engine, adding a blower that makes 8psi and 400hp. Then adding headers and the engine now makes 430hp at 6psi. It became more volumetrically efficient and flowed more MASS flow so pressure dropped.
Its all about MASS flow. not pressure.
that 18psi on the 416 is at a certain mass flow. swapping the setup onto the 408 and 370 will not flow the same mass at the same rpm so pressure cannot be deduced on the information you have provided.
pressure is the resistance to flow.
each of those engines flow differently on an efficiency scale.
Its like taking a stock engine, adding a blower that makes 8psi and 400hp. Then adding headers and the engine now makes 430hp at 6psi. It became more volumetrically efficient and flowed more MASS flow so pressure dropped.
Its all about MASS flow. not pressure.
that 18psi on the 416 is at a certain mass flow. swapping the setup onto the 408 and 370 will not flow the same mass at the same rpm so pressure cannot be deduced on the information you have provided.
TECH Apprentice
Joined: Feb 2014
Posts: 328
Likes: 1
From: Baton Rouge La
that is a massive math problem.
pressure is the resistance to flow.
each of those engines flow differently on an efficiency scale.
Its like taking a stock engine, adding a blower that makes 8psi and 400hp. Then adding headers and the engine now makes 430hp at 6psi. It became more volumetrically efficient and flowed more MASS flow so pressure dropped.
Its all about MASS flow. not pressure.
that 18psi on the 416 is at a certain mass flow. swapping the setup onto the 408 and 370 will not flow the same mass at the same rpm so pressure cannot be deduced on the information you have provided.
pressure is the resistance to flow.
each of those engines flow differently on an efficiency scale.
Its like taking a stock engine, adding a blower that makes 8psi and 400hp. Then adding headers and the engine now makes 430hp at 6psi. It became more volumetrically efficient and flowed more MASS flow so pressure dropped.
Its all about MASS flow. not pressure.
that 18psi on the 416 is at a certain mass flow. swapping the setup onto the 408 and 370 will not flow the same mass at the same rpm so pressure cannot be deduced on the information you have provided.
I am impressed. 
To even further muddy the answer.... the smaller cube motor may make more power, with less boost psi if it's got a bigger bore, and better heads, and a different compression ratio than the bigger motor.
I wouldn't think that there would be much difference between the 416 and the 408, depending on how the cubic inches are achieved, but the 370 will definitely see more psi than the other 2 combos.
I wouldn't think that there would be much difference between the 416 and the 408, depending on how the cubic inches are achieved, but the 370 will definitely see more psi than the other 2 combos.