# Stroker Specifications

[Introduction] [Parts Selection] [Parts List] [Specifications] [Preparation] [Assembly] [Installation] [Results] [Updates] [FAQ's]

My stroker engine is a slight variant of the 4.6L "poor man's" stroker recipe on the stroker page of my performance website. The only difference is the Crane CRN-753905 camshaft.
Using the following engine math formulae, this is how they apply to my stroker engine:

1. Deck height = Rod length + stroke/2 + piston pin height + deck clearance

9.453" = 5.875" + 1.948" + 1.585" + 0.045"

2. Total combustion volume = Combustion chamber volume + head gasket volume + deck clearance volume + piston dish volume

92.2cc = 57.0cc + 8.8cc + 8.9cc + 17.5cc

3. Compression ratio (CR) = Cylinder volume/combustion volume + 1.0

CR = 760.5/92.2 + 1.0 = 8.25 + 1.0 = 9.25

0.088" = 0.045" + 0.043"

Bore: 3.895"
Stroke: 3.895"
No. of Cylinders: 6
Displacement: 4563cc (4.6L)
Deck Height: 9.453"
Rod Length: 5.875"
Piston Compression Height: 1.585"
Deck Clearance: 0.045"
Quench Height: 0.088"
Piston Dish Volume: 17.5cc
Combustion Chamber Volume: 57.0cc
Compression Ratio: 9.25:1

Dyno 2000 predicted flywheel outputs:

256hp @ 4850rpm
316lbft @ 3250rpm

Camshaft Specifications

Duration @ 0.050" Tappet lift I/E: 204/216 degrees
Lobe Separation Angle: 112 degrees
Intake Centerline: 107 degrees
Valve Overlap: 42 degrees
Valve lift I/E: 0.456"/0.484"
Cam Timing @ 0.050" Tappet Lift:
IVO 5*ATDC
IVC 29*ABDC
EVO 45*BBDC
EVC 9*BTDC
Minimum RPM: 1200
Maximum RPM: 4800
Valve Float RPM: 5400 (with Crane 96803 valve springs, not used here)

Ancillary Performance Modifications

Homebrew FIPK with S&B 7" Powerstack cone filter
Modified '86-'93 Mustang 65mm TB
Poweraid TB spacer taper bored 65mm to 62mm
'01 XJ intake manifold
Thermotec intake manifold heatshield
Ford Racing 24lb/hr injectors
Relocated IAT sensor
Modified Borla header with 3.0" collector
Custom 3.0" S-pipe
Flowmaster center muffler
Magnaflow rear muffler
Mike Leach 2.5" tailpipe with chromed oval tip