Re: 427 Tall Deck BBC Find 15 years Later after Long Term St
I,m all too well aware of the concept of having the drive train, cooling system, lubrication system,ignition, steering,suspension and brakes need to be matching the power plant , and that's again why I,m still collecting parts , for my c4 big block swap rather than slapping something together half-assed with the parts i have on hand and expecting it to work and wondering why it won,t or why all the other parts won,t function correctly.
once you've helped build a couple of these big block swaps you see the true potential AND the way guys succeed OR screw it up because of the parts used or short cuts they take, and Id prefer to do it right the first time.
only someone with nearly zero experience would think you could order or build a custom engine with double or triple the original power levels like this, and install it in any car, without making a good many other required upgrades, to the brakes, drive train,suspension, cooling systems etc. and you could very easily have a big block chevy 489-572 stoker produce well in excess of twice or even three times the original power levels at the rear wheels
viewtopic.php?f=32&t=151
viewtopic.php?f=38&t=6
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.
I,m all too well aware of the concept of having the drive train, cooling system, lubrication system,ignition, steering,suspension and brakes need to be matching the power plant , and that's again why I,m still collecting parts , for my c4 big block swap rather than slapping something together half-assed with the parts i have on hand and expecting it to work and wondering why it won,t or why all the other parts won,t function correctly.
once you've helped build a couple of these big block swaps you see the true potential AND the way guys succeed OR screw it up because of the parts used or short cuts they take, and Id prefer to do it right the first time.
only someone with nearly zero experience would think you could order or build a custom engine with double or triple the original power levels like this, and install it in any car, without making a good many other required upgrades, to the brakes, drive train,suspension, cooling systems etc. and you could very easily have a big block chevy 489-572 stoker produce well in excess of twice or even three times the original power levels at the rear wheels
viewtopic.php?f=32&t=151
viewtopic.php?f=38&t=6
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.
Last edited: