blown motor ? about rebuild
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blown motor ? about rebuild
Gsr motor all ring lands atleast 8 cracks each, spun rod jbearings all.. On the crank one juirnal is toast. what are my options for cranks,, I all ready have gsr rods and pistons ,motor cleaned up fine with .010, any ls, b16 cranks work and what will need done
thanks
thanks
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Re: blown motor ? about rebuild (vaporboy12)
i dont recommend getting anything done to the crank once its scored up... the bearings never seat right.
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Re: blown motor ? about rebuild (vadersi)
Based on my past experience with scoring a rod journal, you'll probably need to have that one rod journal ground down and use an undersized bearing (.010" or .025" are the common sizes). If that's really what will happen, you'd be better off with buying a good condition, used crank.
When that journal was scored, the bearing wasn't spun, just chewed up.
When that journal was scored, the bearing wasn't spun, just chewed up.
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Re: blown motor ? about rebuild (vadersi)
To use the LS crank, you need to use conrods for the LS.
There's also the option to use GS-R length rods, but you need to use custom pistons with the wrist pin moved up to keep the piston-to-deck height reasonably at or below the deck.
Oil squirters might also be an issue too, so you'll need to check the clearance against the crank counterweight and the piston pin boss area and piston skirt.
If you need to plug the oil squirters, you can have somebody chop and weld the tips shut or drill/tap the block to plug it with a NPT plug.
- Displacement -
81.5mm bore (if you use aftermarket forged pistons):
81.5mm / 2 = 40.75mm
40.75mm (^2) = 1660.5625 mm^2
1660.5625mm^2 x 3.14 = 5214.16625mm^2 (this is the total surface area of the bore)
We multiply by the height (stroke) to get the total volume of one cylinder. In this case, the crank stroke length is 89mm.
5214.16625mm^2 x 89mm = 464060.79625mm^3
Convert from cubic millimeters to cubic centimeters (which is the same as a milliliter) by dividing by a conversion factor of 10^3 = 1000.
464060.79625mm^3 x (1/1000) = 464.06079625cm^3 = 464.06079625mL
464.06079625mL is the volume of just one cylinder, so we multiply by the number of cylinder we have (4).
464.06079625mL x 4 = 1856.243185mL
If you used a std 81mm bore piston, then it would be 1834mL.
If you used a 81.25mm OS OEM Honda piston, then it would be 1845mL.
There's also the option to use GS-R length rods, but you need to use custom pistons with the wrist pin moved up to keep the piston-to-deck height reasonably at or below the deck.
Oil squirters might also be an issue too, so you'll need to check the clearance against the crank counterweight and the piston pin boss area and piston skirt.
If you need to plug the oil squirters, you can have somebody chop and weld the tips shut or drill/tap the block to plug it with a NPT plug.
- Displacement -
81.5mm bore (if you use aftermarket forged pistons):
81.5mm / 2 = 40.75mm
40.75mm (^2) = 1660.5625 mm^2
1660.5625mm^2 x 3.14 = 5214.16625mm^2 (this is the total surface area of the bore)
We multiply by the height (stroke) to get the total volume of one cylinder. In this case, the crank stroke length is 89mm.
5214.16625mm^2 x 89mm = 464060.79625mm^3
Convert from cubic millimeters to cubic centimeters (which is the same as a milliliter) by dividing by a conversion factor of 10^3 = 1000.
464060.79625mm^3 x (1/1000) = 464.06079625cm^3 = 464.06079625mL
464.06079625mL is the volume of just one cylinder, so we multiply by the number of cylinder we have (4).
464.06079625mL x 4 = 1856.243185mL
If you used a std 81mm bore piston, then it would be 1834mL.
If you used a 81.25mm OS OEM Honda piston, then it would be 1845mL.
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