Psi help, m45

Hello,

I need help regarding an M45, although this is a basic blower topic. I have a M45 which is producing 10.4 psi.

The engine I am fitting it to is a 1zzfe (toyota 1.8 vvti)
I dont want to produce over 8psi but can do a maxium of 9psi.

I know the maxium speed of the blower is 14000rpm so is this the point at which it produces 10psi?

for example

1400rpm = 1psi
2800rpm = 2psi
4200rpm = 3psi
5600rpm = 4psi
7000rpm = 5psi
8400rpm = 6psi
9800rpm = 7psi
11200rpm = 8psi
12600rpm = 9psi

Have I got this right? in which case i just change the pully wheel to get the correct ratio from the crank.

I have looked at graphs and I am sure this is the way in which it operates so it is not constantly producing 10psi.

Is there any other ways of reducing boost?

Please help so I can finish this project.

Kind regards.

Richard

thats the way prochargers work.

Quote:

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Originally Posted by sleepybu

thats the way prochargers work.

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And the eaton i have the same problem?

But I also need the relation from the cranck pulley, I have a Nissan Mexican Tsuru 2001 model wit GA16DNE engine, like a sentra 91-94 whit engine GA16DE.

I have an Alluminium cranck Pulley from Unorthodox Racing it have 4 lines and i have to change the Eaton pulley, that's the reason because i need the relation. I want only 8 psi if the last pos its right my engine runs at 7000rpm max an the eaton needs to spin 11200 rpm.

the relation is 11200/7000 = 1.6 then i need to divide the diameter of the crank pulley with 1.6 factor and the answer was the diameter for the eaton supercharger to produce 8 psi is this right?

another interrogant was the material to make the eaton pulley, can i make it in alluminium? or the center in metal to bolt in the aluuminium pulley, i know is dificult change it, this situation make me easy the change, I hope your coments, and excuse my bad english.

No, the boost goes to maximum fairly quickly, it's not linear to pulley speed.