434 Engine

434 Race Motor I'm in the process of finishing this engine to replace the current 355 cubic inc small block.
Short block: 4.155 bore x 4.00 Stroke Dart Lil M 4 bolt Block # 31151211 4.155 Bore 9.25 Deck height Spayed steel main caps 350 Main diameter Standard cam location

*Cam* *- Isky Custom Grind* 0.850 base circle 282 / 290 duration @ .050 318 / 324 advertised .705 /.704 lift .028 valve lash hot .022 valve lash cold 108 lobe center 4/7 swap Firing Order 1-8-7-3-6-5-4-2

4340 Eagle Crank and 4340 Rods 4” Stroke crank 350 Main diameter 6” Rod length part # crs6000b3d H Beam “ESP” 3-D JE 18 Deg flat top pistons # 181955 Bore – 4.155 Compression Height 1.000 Compression @ 52 CC’s – 14.0 to 1 -6 cc dome 436 gram weight .028 in the hole .064 / .064 / .218

GM 18 Degree Bowtie Heads Part # 10134363 Intake Port: Dimensions: 1.25" x 2.15" Volume: 252 cc’s Intake Gaskets: Fel-Pro 1277 SCE # 111118 Intake Port Flow:

Intake Port:
Dimensions: 1.25" x 2.15"
Volume: 252 cc’s
Intake Gaskets: Fel-Pro 1277 SCE # 111118
Intake Port Flow:

.100	.200	.300	.400	.500	.600	.700	.800
69.5	144.3	207.2	266.8	303.4	330.4	341.2	341.2

Exhaust Port:

Dimensions: 1.60 x 1.35
Volume: 105 cc’s
Exhaust Gaskets: SCE#
Exhaust Port Flow:

.100	.200	.300	.400	.500	.600	.700	.800
55.4	111.0	146.2	180.8	213.5	231.2	240.6	245.2

Valves:

Titanium Intake valve diameter is 2.15 lengths is 5.50"
Titanium Exhaust valve diameter is 1.625 lengths is 5.50"1

Combustion Chamber:

Volume: 52 cc’s
Head Gasket Required: SCE# T11153 .032 thick copper gaskets
Head O-Ringed Width: ID – 4.250 OD – 4.350 (.051 thick o-ring 0.040 deep)
Copper O-Ring .011 above deck

Rocker arms T&D (shaft mount)
Intake is 0.550" offset
Exhaust is 0.150" offset.
Intake ratio: 1.65
Exhaust ratio: 1.60

Valve Springs
Isky # 9965
Seat Pressure   @ 2.0”     - 230 lbs
Open Pressure @ 1.295 - 550 lbs   (.705 Lift)
Coil bind           @ 1.150

434 Race Motor