Stock Cam Specs?

MiracleMax · 01-20-2001, 01:09 PM

I modeled an HO engine using the following inputs

Short Block
Block: Ford 302
Cylinders: 8
Bore: 4.002
Stroke: 3.000
Cyl Vol: 618.40
Total Vol: 301.9

Cylinder Heads
Cylinder Heads: E7TE Factory
Airflow File: E7TEunported.flw (my own)
Intake Valve: 1
Exhaust Valve: 1
Intake Valve Dia: 1.780"
Exhaust Valve Dia: 1.450"

Compression
Compression Ratio: 8.70:1
Combustion Space: 80.31cc

Induction
Induction Flow: 550cfm @ 1.50 inHg
Fuel: Gasoline
Manifold Type: Tuned Port Injection

Exhaust
Exhaust System: H.P. Manifold & Mufflers

Camshaft
Camshaft Type: HO Cam
Lifter: Hyd/R
Cam Specs @: Seat to Seat
Int. Valve Lift: .444
Exh. Valve Lift: .444
Lobe Center: 115.0
Valve Overlap: 36.0
Int Duration: 266.0
Exh Duration: 266.0
Timing @ Adv (+/-): 0.0
IVO: 17.0 IVC: 69.0
EVO: 67.0 EVC: 19.0
ICA: 116.0 ECA: 114.0

Peak HP @ 4500 RPM: 235
Peak TQ @ 3000 RPM: 323
Peak VE @ 4000 RPM: 79.3%

If I soften the camshaft a bit by using the solid lifter model then it becomes

Peak HP @ 4500 RPM: 220
Peak TQ @ 3000 RPM: 309
Peak VE @ 4000 RPM: 79%

But that seems to fool things a bit as it skews the sim in favor of what was tested from the factory based on output alone. Factor in the following parameters and the 235/323 peaks seem viable?

A/F ratio of 13:1
Detonation free gasoline
68 degree temp @ 0% humidity and atmospheric pressure @ 29.86

unless of course the engine was tested under the exact same conditions?

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01-20-2001, 01:09 PM	#8
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	I modeled an HO engine using the following inputs Short Block Block: Ford 302 Cylinders: 8 Bore: 4.002 Stroke: 3.000 Cyl Vol: 618.40 Total Vol: 301.9 Cylinder Heads Cylinder Heads: E7TE Factory Airflow File: E7TEunported.flw (my own) Intake Valve: 1 Exhaust Valve: 1 Intake Valve Dia: 1.780" Exhaust Valve Dia: 1.450" Compression Compression Ratio: 8.70:1 Combustion Space: 80.31cc Induction Induction Flow: 550cfm @ 1.50 inHg Fuel: Gasoline Manifold Type: Tuned Port Injection Exhaust Exhaust System: H.P. Manifold & Mufflers Camshaft Camshaft Type: HO Cam Lifter: Hyd/R Cam Specs @: Seat to Seat Int. Valve Lift: .444 Exh. Valve Lift: .444 Lobe Center: 115.0 Valve Overlap: 36.0 Int Duration: 266.0 Exh Duration: 266.0 Timing @ Adv (+/-): 0.0 IVO: 17.0 IVC: 69.0 EVO: 67.0 EVC: 19.0 ICA: 116.0 ECA: 114.0 Peak HP @ 4500 RPM: 235 Peak TQ @ 3000 RPM: 323 Peak VE @ 4000 RPM: 79.3% If I soften the camshaft a bit by using the solid lifter model then it becomes Peak HP @ 4500 RPM: 220 Peak TQ @ 3000 RPM: 309 Peak VE @ 4000 RPM: 79% But that seems to fool things a bit as it skews the sim in favor of what was tested from the factory based on output alone. Factor in the following parameters and the 235/323 peaks seem viable? A/F ratio of 13:1 Detonation free gasoline 68 degree temp @ 0% humidity and atmospheric pressure @ 29.86 unless of course the engine was tested under the exact same conditions?