406 Small Block Chevy Engine - Upper Limits

406 STROKER
Displacement	406.0 ci
Bore x stroke	4.155 x 3.750
Rotating assembly	Probe forged steel crank & rods
Pistons	Probe forged
Heads	Dart Pro 1 CNC
Compression	11.1:1
Intake	Edelbrock Victor Jr., port-matched
Carburetor	850-cfm Mighty Demon, 79/87 jets
Camshaft	Comp Cams hydraulic roller
Valve lift (w/1.6 rockers)	0.600/0.619 intake/exhaust
Duration (at 0.050)	248/254 degrees,intake/exhaust
Lobe separation	110 degrees
DYNO DETAILS
Ignition	MSD 7AL Digital
Headers	Hedman 131/44-inch long-tube, 18-inch extensions
Baseline
Fuel	91-octane
Advance	36 degrees
Peak torque	539
Peak hp	594
Avg torque	500
Avg hp	461
125-shot
Jets	56 fuel/56 nitrous
Fuel	91-octane
Advance	29 degrees
Peak torque	672
Peak hp	747
Avg torque	571
Avg hp	563
175-shot
Jets	73 fuel/73 nitrous
Fuel	118-octane
Advance	26 degrees
Peak torque	774
Peak hp	840
Avg torque	589
Avg hp	581

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