6 Bolt block assembling

[nkosi]

just wanted to know how are the connecting rods supposed to be assembled in the block ...where do i postion the knotches for the rod bearings ...do the go to the rear or front of the engine or this does not matter ...also im gapping the new pistons rings i went with .020 on the top compression ring and .024 on the second ring ... im planning on running 25 to 35 pounds of boost on the new built engine ...let me know fella's

 

[keltalon]

the knotch goes to the back of the block. I have alway used top ring gap of 19 top and 21 second ring. Just my .02

 

[nkosi]

the knotch goes to the back of the block. I have alway used top ring gap of 19 top and 21 second ring. Just my .02

well me and my engine builder did the calculation on the amount of gap at .006 per inch of bore top compression ring and .008 for the second ring for the amount of boost ill be running on the engine ...the builder that did my engine has 25 years of drag racing expierence and numerous record breaking cars ...im running a 85.5mm/3.366" bore with stock stroke

 

[donniekak]

well me and my engine builder did the calculation on the amount of gap at .006 per inch of bore top compression ring and .008 for the second ring for the amount of boost ill be running on the engine ...the builder that did my engine has 25 years of drag racing expierence and numerous record breaking cars ...im running a 85.5mm/3.366" bore with stock stroke

I have built engines with similar gaps, without any issues. Leakdown numbers were fine, and none of them popped the dipstick. When i started on dirtbikes years ago, i used the formula in the wiseco ring packs. It still serves me well to this day.

 

[19Eclipse90]

the knotch goes to the back of the block. I have alway used top ring gap of 19 top and 21 second ring. Just my .02

Stock rods have the notches for the bearings on the exhaust side which would be the front of the block.

 

[nkosi]

Stock rods have the notches for the bearings on the exhaust side which would be the front of the block.

hmm two different answers on which way the knotches go ...any one else can comment on the position of the bearing knotches

 

[19Eclipse90]

I have two assembled pistons/rods sitting right here, a 6-bolt and a 7-bolt, so I'm not just guessing at it.

The markings on the rods face the timing side of the engine as well as the arrow on the pistons. This places the notches on the exhaust side.

If you'd rather, the stock rods have the oil hole for piston crown cooling on the exhaust side. This is the same side as the notches.

 

[nkosi]

I have two assembled pistons/rods sitting right here, a 6-bolt and a 7-bolt, so I'm not just guessing at it.

The markings on the rods face the timing side of the engine as well as the arrow on the pistons. This places the notches on the exhaust side.

If you'd rather, the stock rods have the oil hole for piston crown cooling on the exhaust side. This is the same side as the notches.

thanks dude for the confirmation on the position of the knotches ...i diffinately want to assemble the motor how the mitsu factory did it with the stronger internals ...i will place the bearing notches on the exhuast side ...