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Discussion Starter #1
anyone have the stock cams measurements?

both durations and the intake/exhaust for them.

lift at top dead center

valve lift

cam lift

timing

peak angle


I want to compare between the cat cams and our stockers. I'm in a heated discussion with a local svt guy about how different they have to be.
 

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this is what i got.. scroll down

ENGINE SPECIFICATIONS


General Ford DuraTech
Displacement 2.5L (153CID)
Number of Cylinders 6
Bore and Stroke 82.4x79.5 (3.25x3.13in)
Firing order 1 - 4 - 2 - 5 - 3 - 6
Oil Pressure 138-310kPa (20-45psi)
CYLINDER HEAD AND VALVE TRAIN
Combustion Chamber Volume 44.5+/- 1.5cc (2.7+/-0.09in) (9.4:1)
Valve Bore Diameter
Valve Seats
Width - intake 1.1-1.4mm (0.043-0.055in)
Width - exhaust 1.4-1.7mm (0.055-0.066in)
Angle 44.75 degrees
Runout (T.I.R.) Max 0.04mm (0.001in)
Valve Arrangements
(Front to Rear) (P)rimary, (S)econdary, (E)xhaust
LH Intake S-P-S-P-S-P
LH Exhaust E-E-E-E-E-E
RH Intake P-S-P-S-P-S
RH Exhaust E-E-E-E-E-E
Valve Stem to Guide Clearance
Intake 0.020-0.069mm (0.0007-0.027in)
Exhaust 0.045-0.094mm (0.0017-0.037in)
Valve Head Diameter
Intake 32mm (1.26in)
Exhaust 26mm (1.02in)
Gauge Diameters 31 and 24.5mm (1.22 and 0.96in)
Valve Face Runout Limit 0.05mm (0.001in)
Valve Face Angle 45.5 degrees
Valve Stem Diameter (Std)
Intake 5.975-5.995mm (0.2350-0.2358in)
Exhaust 5.950-5.970mm (0.2343-0.2350in)
Valve Springs
Compression Pressure (N @ Spec. Length)
Intake [email protected] ([email protected])
Exhaust [email protected] ([email protected])
Free Length (Approximate)
Intake 46.8mm (1.84in)
Exhaust 46.8mm (1.84in)
Installed Pressure (N @ Spec. length)
Intake [email protected] ([email protected])
Exhaust [email protected] ([email protected])
Service Limit 10% Pressure loss @ 30.09
Out of Square Limit 1%
Rocker Arm Ratio 1.8:1
Hydraulic Valve Tappet
Diameter (Std) 16-15.988mm (0.6290-0.6294in)
Clearance to Bore 0.018-0.069mm (0.0007-0.0027in)
Service Limit 0.016mm (0.0006in)
Hydraulic Leakdown Rate 5-25 seconds
Collapsed Valve Tappet Gap - De 0.50-1.11mm (0.019-0.043in)
Hydraulic Lash Adjuster (HLA) to Cylinder Block Clearance
Standard
Maximum
CAMSHAFT
Lobe Lift
Intake (Primary) 4.79mm (0.188in)
Intake (Secondary) 4.79mm (0.188in)
Exhaust 4.79mm (0.188in)
Allowable Lobe Lift Loss 0mm (0in)
Theoretical Valve Lift @ Zero Lash
Intake (Primary) 9.80mm (0.388in)
Intake (Secondary) 9.80mm (0.388in)
Exhaust 9.80mm (0.388in)
End Play
Standard 0.025-0.165mm (0.001-0.0064in)
Service Limit 0.190mm (0.00748in)
Journal to Bearing Clearance
Standard 0.025-0.076mm (0.001-0.0029in)
Service Limit 0.121mm (0.047in)
No. 1 and 5
No. 2, 3, and 4
Journal Diameter (all) 26.962-26.936mm (1.061-1.060in)
RH Cylinder Head
Intake - No. 1
Exhaust - No. 1
No. 2, 3, and 4 (Intake - Exhaust)
No. 5 (Intake - Exhaust)
LH Cylinder Head
Intake - No. 1
Exhaust - No. 1
No. 2, 3, and 4 (Intake - Exhaust)
No. 5 (Intake - Exhaust)
Camshaft Runout
Bearing Inside Diameter (all) 27.012-26.987mm (1.063-1.062in)

CYLINDER BLOCK
Head Gasket Surface Flatness 0.25 / 25 x 25.050 / 150 x 150
Cylinder Bore
Diameter
Grade 1 82.4-82.410mm
Grade 2 82.411-82.421mm
Grade 3 82.420-82.430mm
Surface Finish (RMS) 0.2-0.6 microns
Out of Round Limit 0.015mm (.0005in)
Out of Round Service Limit 0.020mm (.0007in)
Taper Service Limit 0.006mm (.0002in)
Main Bearing Bore Diameter 68.998-69.022mm (2.716-2.717in)
Minimum
0.25mm (0.010in) Undersize Standard
CRANKSHAFT
Main Bearing Journal Diameter
Out of Round Limit
Taper Limit
Journal Runout Limit
Standard Diameter 62.968-62.992mm (2.467-2.479in)
Minimum Diameter
0.25mm (0.010in) Oversize
Thrust Bearing Journal
Crankshaft End Play
Standard 0.110-0.232mm (.004-.009in)
Maximum
Connecting Rod Journal
Diameter 49.970-49.990mm (1.967-1.968in)
Out of Round Limit 0.050mm Max (0.001in)
Taper Limit
Main Journal Oil Clearance
Standard
Maximum
Available Undersize Bearing
Connecting Rod Bearings
Clearance to Crankshaft 0.028-0.066mm (0.001-0.0025in)
Maximum
Thrust Bearing Thickness
Standard
.25mm (0.010in) Oversize
.50mm (0.020in) Oversize
Bearing Wall Thickness (Std) 1.503mm (.059in)
Main Bearings
Clearance to Crankshaft -Desired 0.025-0.045mm (0.0009-0.0001in)
Clearance to Crankshaft -Allowab 0.025-0.050mm (0.0009-0.0019in)
Maximum
Available Undersize
Bearing Wall Thickness
Grade 1 2.501mm (0.0984in)
Grade 2 2.505mm (0.0986in)
Grade 3 2.510mm (0.0988in)
CONNECTING ROD
Piston Pin Bore Diameter 21.017-21.032mm (0.827-0.828in)
Crankshaft Bearing Bore Diamete 53.015-53.035mm (2.0872-2.0879in)
Length (Center to Center) 138.06-138.4mm (5.435-5.448in)
Alignment (Bore to Bore Max Difference)
Twist 0.050mm per 25 (0.0019 per 0.984in)
Band 0.038mm per 25 (0.0014 per 0.984in)
Side Clearance (Assembled to Crank)
Standard 0.100-0.30mm (0.0039-0.0118in)
Service Limit 0.35mm Max (0.0137in)
PISTONS
Diameter
Coded Grade 1 82.390-82.410mm (3.2436-3.2444in)
Coded Grade 2 82.398-82.422mm (3.2440-3.2449in)
Coded Grade 3 82.410-82.430mm (3.2444-3.2452in)
Piston to Bore Clearance
Standard 0.012-0.022mm (0.0005-0.0009in)
Maximum
Pin Bore Diameter 21.008-21.012mm (0.8270-0.8272in)
Ring Groove Width
Compression (Top) 1.230-1.245mm (0.0484-0.0490in)
Compression (Bottom) 1.530-1.545mm (0.0602-0.0608in)
Oil Ring 3.030-3.055mm (0.1192-0.1200in)
Piston Pin
Length 55.05-55.47mm (0.0001-0.0078in)
Diameter 21.011-21.013mm (0.0013in)
Pin to Piston Clearance -0.005 to +0.001mm (0.0001-0.00003in)
Pin to Rod Clearance
Standard 0.004-0.020mm (0.0001-0.0007in)
Service Limit 0.035mm (0.0013in)
Piston Ring Width (Compressed)
Side Clearance
Compression (Top) 0.040-0.075mm (0.0015-0.0029in)
Compression (Bottom) 0.040-0.085mm (0.0015-0.0033in)
Oil Ring Snug Fit
Service Limit 0.10mm (0.0039in)
Piston Ring Gap
Compression (Top) - gauge di 0.100-0.250mm (0.0039-0.0098in)
Compression (Bottom) - gauge 0.27-0.42mm (0.0106-0.0165in)
Oil Ring (Steel Rail) gauge 0.15-0.65mm (0.0059-0.0255in)
Compression (Top) - Service Limit 0.50mm Max (0.0196in)
Compression (Bottom) -SvcLim 0.65mm Max (0.0255in)
Oil Ring (Steel Rail) - SvcLim 0.90mm Max (0.0354in)
LUBRICATION SYSTEM
Oil Pump Type
Oil Rotor to Oil Pump Housing Clearance
Rotor Tooth Tip Clearance
Oil Capacity
Total (Dry engine) 5.5L (5.8qt)
Refill (With Filter)
Refill (Less Filter)
 

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Discussion Starter #4
wow, nice work neil!!

where did u get that from?
 

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i visit the ceg as much as i do here,

Neco's more of a social spot

Ceg is an information gold mine where nobody screams "SEARCH!" when anyone asks a question.
 
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