IF your going to build a big block Chevy it usually helps to know your options and longer strokes and rods help.
Id also point out that doing the math before you purchase parts will save you a great deal of wasted cash,
and if that engine your contemplating is intended to exceed about 4200 feet per minute in piston speed or 6200rpm,
you might want too think seriously about 4340 forged steel crank, forged pistons, and rods with 7/16" ARP rod bolts
youll generally want to build a tall deck, engine with longer connecting rods to take full advantage of the tall deck architecture
the deck heights .400 taller so youll generally want connecting rods that are longer on the 4.25", stroke , stroker crank
IVE GENERALLY USED SCAT CRANK ROTATING ASSEMBLIES WITH 7/16" ARP ROD BOLTS and 6.385" 0r 6.535" rods as they are longer to compensate for the .400 taller deck height, a call to SCAT will get you the correct part number for a kit forged and internally balanced rotating assembly kit Phone: 310 370 5501
10.2 deck minus 1.52 compression height, minus 6.535 rods and 4.25/2= minus 2.125 stroke = .02 so the pistons going to stick above the deck .02 requiring a bit thicker .062 head gasket too get the .040-.042 quench Ill look to
achieve
http://www.summitracing.com/parts/sum-111551
http://www.jegs.com/i/Eagle/356/11512100/10002/-1?parentProductId=
http://www.superchevy.com/how-to/project-cars/0704ch-chevy-big-block/
http://www.scatcrankshafts.com/rotating-assembies/chevy-rotating-assemblies/
http://garage.grumpysperformance.co...r-heads-or-piston-dome-volume.2077/#post-9049
http://garage.grumpysperformance.com/index.php?threads/another-496bbc.5123/page-2#post-49183
http://garage.grumpysperformance.com/index.php?threads/deck-height-problems.3048/#post-8049
http://garage.grumpysperformance.com/index.php?threads/build-a-496-stroker-bbc.101/#post-49427
http://garage.grumpysperformance.com/index.php?threads/a-mid-range-454-bbc-build.8215/#post-54632
http://scatcrankshafts.com/
common BB CHEVY piston compression heights are
1.270"
1.395"
1.520"
1.645"
1.765"
remember the blocks deck height, minus the piston pin height minus 1/2 the crank stroke will equal the required connecting rod length
OR
the blocks deck height, minus the connecting rod length, minus 1/2 the crank stroke. will equal the required piston pin height
yes its common for a combo to have the piston deck height located .010-.015 above or below the deck of the block so you'll need to select a head gasket thickness that compensates, too allow your engine to get a .038-.044 piston deck to cylinder head QUENCH DISTANCE.
keep in mind you want to get the compression ratio and quench distances correct for the intended application.
your current distributor can usually be easily modified by a local machine shop with a lathe for an adjustable slip collar by carefully machining off the current one and adding a slip collar, if you need to make distributor gear to cam gear engagement or oil pump drive shaft length changes
the tall deck block requires a longer reach distributor shaft thats about 0.28 longer thus the need for the adjustable collar on the distributor adding the extra reach to get the oil pump drive and drive gears to properly align and mesh.
common BB CHEVY piston compression heights are
1.270"
1.395"
1.520"
1.645"
1.765"
remember the blocks deck height, minus the piston pin height minus 1/2 the crank stroke will equal the required connecting rod length
OR
the blocks deck height, minus the connecting rod length, minus 1/2 the crank stroke. will equal the required piston pin height
yes its common for a combo to have the piston deck height located .010-.015 above or below the deck of the block so you'll need to select a head gasket thickness that compensates, too allow your engine to get a .038-.044 piston deck to cylinder head QUENCH DISTANCE.
Id also point out that doing the math before you purchase parts will save you a great deal of wasted cash,
and if that engine your contemplating is intended to exceed about 4200 feet per minute in piston speed or 6200rpm,
you might want too think seriously about 4340 forged steel crank, forged pistons, and rods with 7/16" ARP rod bolts
youll generally want to build a tall deck, engine with longer connecting rods to take full advantage of the tall deck architecture
the deck heights .400 taller so youll generally want connecting rods that are longer on the 4.25", stroke , stroker crank
IVE GENERALLY USED SCAT CRANK ROTATING ASSEMBLIES WITH 7/16" ARP ROD BOLTS and 6.385" 0r 6.535" rods as they are longer to compensate for the .400 taller deck height, a call to SCAT will get you the correct part number for a kit forged and internally balanced rotating assembly kit Phone: 310 370 5501
10.2 deck minus 1.52 compression height, minus 6.535 rods and 4.25/2= minus 2.125 stroke = .02 so the pistons going to stick above the deck .02 requiring a bit thicker .062 head gasket too get the .040-.042 quench Ill look to
achieve
http://www.summitracing.com/parts/sum-111551
http://www.jegs.com/i/Eagle/356/11512100/10002/-1?parentProductId=
http://www.superchevy.com/how-to/project-cars/0704ch-chevy-big-block/
http://www.scatcrankshafts.com/rotating-assembies/chevy-rotating-assemblies/
http://garage.grumpysperformance.co...r-heads-or-piston-dome-volume.2077/#post-9049
http://garage.grumpysperformance.com/index.php?threads/another-496bbc.5123/page-2#post-49183
http://garage.grumpysperformance.com/index.php?threads/deck-height-problems.3048/#post-8049
http://garage.grumpysperformance.com/index.php?threads/build-a-496-stroker-bbc.101/#post-49427
http://garage.grumpysperformance.com/index.php?threads/a-mid-range-454-bbc-build.8215/#post-54632
http://scatcrankshafts.com/
common BB CHEVY piston compression heights are
1.270"
1.395"
1.520"
1.645"
1.765"
remember the blocks deck height, minus the piston pin height minus 1/2 the crank stroke will equal the required connecting rod length
OR
the blocks deck height, minus the connecting rod length, minus 1/2 the crank stroke. will equal the required piston pin height
yes its common for a combo to have the piston deck height located .010-.015 above or below the deck of the block so you'll need to select a head gasket thickness that compensates, too allow your engine to get a .038-.044 piston deck to cylinder head QUENCH DISTANCE.
keep in mind you want to get the compression ratio and quench distances correct for the intended application.
AFR 357cc BBC Rectangle Port Cylinder Heads 100% Titanium Retainers CNC Ported - Air Flow Research 2010 - TREperformance.com
TREperformance sells new AFR 357cc BBC Rectangle Port Magnum aluminum cylinder heads from Air Flow Research for almost any Chevy big block vehicle, this is part # 2010-TI.
treperformance.com
your current distributor can usually be easily modified by a local machine shop with a lathe for an adjustable slip collar by carefully machining off the current one and adding a slip collar, if you need to make distributor gear to cam gear engagement or oil pump drive shaft length changes
the tall deck block requires a longer reach distributor shaft thats about 0.28 longer thus the need for the adjustable collar on the distributor adding the extra reach to get the oil pump drive and drive gears to properly align and mesh.
common BB CHEVY piston compression heights are
1.270"
1.395"
1.520"
1.645"
1.765"
remember the blocks deck height, minus the piston pin height minus 1/2 the crank stroke will equal the required connecting rod length
OR
the blocks deck height, minus the connecting rod length, minus 1/2 the crank stroke. will equal the required piston pin height
yes its common for a combo to have the piston deck height located .010-.015 above or below the deck of the block so you'll need to select a head gasket thickness that compensates, too allow your engine to get a .038-.044 piston deck to cylinder head QUENCH DISTANCE.
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