UK Karting - Notice Board (2-Stroke Karting) : Re: bt82 con rod

Notice Board (2-Stroke Karting)

Re: bt82 con rod
Posted by 'SimonS' on 07 Jan 2009 @ 13:00

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SimonSJoined: December 2004
Total Posts: 4
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Is that longitudinally or laterally?

Longitudinal ovality is because thats the direction of load (and thats up to 500G) as the piston goes through TDC and BDC.

It can be aggravated by pre-ignition banging the piston 'down' before it gets to TDC.

Lateral ovality can be due to piston squirm and slap. Squirm is when the conrod compresses under the load of going through BDC and unloads as it goes up the cylinder, twisting slightly.

Both can be aggravated by a 'not square' or worn crank, so you might want to check that too.

Message Thread:

bt82 con rod by 'buzzinrussell' (04 Jan 2009 @ 21:20)

Re: bt82 con rod by 'Aquila' (04 Jan 2009 @ 21:49)

Re: bt82 con rod by 'drewdt3' (05 Jan 2009 @ 18:19)

Re: bt82 con rod by 'buzzinrussell' (05 Jan 2009 @ 21:29)

Re: bt82 con rod by 'SimonS' << You are here!

Re: bt82 con rod by 'buzzinrussell' (07 Jan 2009 @ 13:28)

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