Just for those that are looking to turbo their ECOTEC motors. I took some initiative and did the calcs for VE of our motors between 2k and 7k (since even numbers were easier) taking into account:

Stock Head(85%) VE

MODDED Head(90%) VE

HIGHLY MODDED Head(95%) VE

And also the corrected VE with a turbo producing 5, 7, 10, 12, 15, 18, and 20 PSI (How much air you should be flowing at that PSI of boost and that Heads VE)

A few Acronyms:

CID - Cubic Inch Displacement

RPM - Revolutions / Minute

VE - Volumetric Efficiency

ATM - Atmosphere

PSI - Pounds / SQ. IN.

RAW ENGINE CFM = (CID x RPM)/3456

CORRECTED FOR HEAD FLOW(ch) chCFM = CFM x (.85, .90, .95)

LBS/MIN. CONVERSION = chCFM x .069

Pressure Ratio(PR) = (P1+P2)/P2

- where P1 = Desired Boost

- where P2 = 14.7 psi

Naturally Aspirated VE x Insert PR here=Corrected Airflow of [email protected]

This is all just so that you understand where I am pulling this from and not just from my fuggin ass. And now for the GOOD shit.

_5 psi = 1.34

_7 psi = 1.48

10 psi = 1.68

12 psi = 1.82

15 psi = 2.02

18 psi = 2.22

20 psi = 2.36

http://www.sixthsphere.com/storage/1090 ... tec_ve.rtf

http://www.sixthsphere.com/storage/1090 ... tec_ve.rtf

http://www.sixthsphere.com/storage/1090 ... tec_ve.rtf

I just realized I can't post up fucking PICS...VIN GIMME SOME PIC ACCESS SO YOU FACKERS CAN SEE THE CHARTS I MADE. Will post up the tables when I get some access.

ALSO would like to Drop a thanks to TITAN of Turbosaturns.net for having all the equations for this in the Articles...gotta pay credit where credit is due.

I hope this is understood, I'll drop the damn charts in as soon as I get my picture access. Those will help you all immensely when you can see what I'm talking about.

Tim

Stock Head(85%) VE

MODDED Head(90%) VE

HIGHLY MODDED Head(95%) VE

And also the corrected VE with a turbo producing 5, 7, 10, 12, 15, 18, and 20 PSI (How much air you should be flowing at that PSI of boost and that Heads VE)

A few Acronyms:

CID - Cubic Inch Displacement

RPM - Revolutions / Minute

VE - Volumetric Efficiency

ATM - Atmosphere

PSI - Pounds / SQ. IN.

__The Formulae:__RAW ENGINE CFM = (CID x RPM)/3456

CORRECTED FOR HEAD FLOW(ch) chCFM = CFM x (.85, .90, .95)

LBS/MIN. CONVERSION = chCFM x .069

Pressure Ratio(PR) = (P1+P2)/P2

- where P1 = Desired Boost

- where P2 = 14.7 psi

Naturally Aspirated VE x Insert PR here=Corrected Airflow of [email protected]

This is all just so that you understand where I am pulling this from and not just from my fuggin ass. And now for the GOOD shit.

__Pressure Ratio #'s___5 psi = 1.34

_7 psi = 1.48

10 psi = 1.68

12 psi = 1.82

15 psi = 2.02

18 psi = 2.22

20 psi = 2.36

__At 85% VE:__http://www.sixthsphere.com/storage/1090 ... tec_ve.rtf

__At 90% VE:__http://www.sixthsphere.com/storage/1090 ... tec_ve.rtf

__At 95% VE:__http://www.sixthsphere.com/storage/1090 ... tec_ve.rtf

I just realized I can't post up fucking PICS...VIN GIMME SOME PIC ACCESS SO YOU FACKERS CAN SEE THE CHARTS I MADE. Will post up the tables when I get some access.

ALSO would like to Drop a thanks to TITAN of Turbosaturns.net for having all the equations for this in the Articles...gotta pay credit where credit is due.

I hope this is understood, I'll drop the damn charts in as soon as I get my picture access. Those will help you all immensely when you can see what I'm talking about.

Tim

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