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Crank Tech Pins and Bores http://www.pilotodyssey.com/PO/viewtopic.php?f=46&t=11767 |
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Author: | speedchaser [ Fri Mar 01, 2013 2:39 pm ] | |||||||
Post subject: | Crank Tech Pins and Bores | |||||||
Hello All I do not post much very dizzy lately I Have slickricks Cranks here and I been going thru them and I finding some Interesting Data First off the crank that was welded and that had move out of concentric I tried to straighten it back up but it was not moving back to where it need to go even after grinding the weld off the side that cracked. so I clean up all the weld and pressed it apart then clean every thing up for inspection this is was I have found see pic's and NOTES below with the findings that i have found we have about .003" press fit or .0015" preside witch is good but the crank that was welded should have been trashed or fixed on the clutch side If you look at the sizes below I have found that the crank get hammered on the compression stroke The Bad crank can be fixed but my cost to much. the bore would need to be honed out and a step crank rod pin would need to be made and pressed in the wright way and noted on the crank how to remove Thanks For looking Speed
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Author: | hoser [ Fri Mar 01, 2013 2:51 pm ] |
Post subject: | Re: Crank Tech Pins and Bores |
How about boring the hole out over sized then pressing in a bushing and welding the bushing in place then press in a standard crank pin true it up then weld the bushing to pin as normal? I have seen stroker cranks where they press in a slug then machine the new hole offset to create the stroke they want. |
Author: | speedchaser [ Fri Mar 01, 2013 3:12 pm ] |
Post subject: | Re: Crank Tech Pins and Bores |
hoser wrote: How about boring the hole out over sized then pressing in a bushing and welding the bushing in place then press in a standard crank pin true it up then weld the bushing to pin as normal? I have seen stroker cranks where they press in a slug then machine the new hole offset to create the stroke they want. that's a lot of setup work just for a bushing that would probably fail . welding it up would all right but still a lot of work compared to a lap job and a over sized step pin because we all ready have the hole there Or if we can find a good clutch side I sure it will work that way too Speed |
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