4 mil cranks

[uwenr]

Can someone tell the difference between the 4 mil +5 rod and the 4 mil stock rod. Logic tells me moving the rod 4mm is 4mm no matter how long the rod is. A longer rod will raise the piston but still have the same stroke. Then you put stroker or blaster pistons in it to lower the top of the piston down. I'm confused! I get the less stress on the sides but what about power? more less same?

[locogato11283]

almost everyone goes with the longer rod. it just puts less stress on moving parts. power should be the same. the 4mm crank actually moves the rod out 2mm. you got 2mm when its up and 2mm when its down, giving you the extra 4mm of stroke.

[uwenr]

almost everyone goes with the longer rod. it just puts less stress on moving parts. power should be the same. the 4mm crank actually moves the rod out 2mm. you got 2mm when its up and 2mm when its down, giving you the extra 4mm of stroke.

Thanks thats what I was looking for. I had picked up this bottom end cheap and the crank was in it. Took it to metaltech and they said the rod and bearing are good. Fully rebuildable

[dajogejr]

The stock (short rod, 110mm) will rev quicker.

The long rod (115mm) puts less stress on the motor.

The longer connecting rod puts less stress by not wanting to push the piston through the front of the cylinder.

The long rod 115mm is the more common setup when dealing with stroker cranks 10mm or under.