volumetric efficiency

[wookieneck]

Does anyone know what the rated volumetric efficiency is on a bone stock 420a?

 

[esi-slowboy]

I got the formula but some of the plugins may be wrong Plugins being -**-.
Im probably wrong but from the math i did its 75% of 230 cfm
(cubic inches-122-)/(revolutions-how many revolutions crank rotates to pull 122 ci-)=
61 ci. of air per revolution
(61 ci per rev) x (6500 revs per minute- this is what i plugged in not sure if right-)=
396500 ci per minute
(396,500 cim) / ( 1728 ci per cubic foot) = 230 cfm 65 to 75 % of that is our V.E

 

[qwik59]

I'm going to have to dig around to find my formula's, but I know right off the bat you need your intake and exhaust flow numbers from your head and cubic inches of the motor. This will tell you the maximum VE for you head, and from there, you just try to get the external pieces to flow the maximum to obtain that VE. Depending on what parts are used on the outside will also determine at which point(rpm) your maximum VE will be.

 

[timmytownsend88]

I would like to know this to for the settings for my torque app.

P.S sorry to bring up old thread