From my mate Carst at Miniminded.
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| modified crankshaft in Netherlands https://www.ausmini.com/forums/viewtopic.php?f=5&t=82639 |
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| Author: | mickmini [ Thu Sep 05, 2013 7:57 pm ] |
| Post subject: | modified crankshaft in Netherlands |
From my mate Carst at Miniminded. |
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| Author: | Mick [ Thu Sep 05, 2013 8:35 pm ] |
| Post subject: | Re: modified crankshaft in Netherlands |
Yikes! 
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| Author: | drmini in aust [ Thu Sep 05, 2013 9:29 pm ] |
| Post subject: | Re: modified crankshaft in Netherlands |
I saw one like that down at Greig's, out of a race car, crack started from the C-washer slot. Good to do without one (as per GR's latest cranks) if running straight cut drops. |
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| Author: | Beanie [ Fri Sep 06, 2013 8:30 am ] |
| Post subject: | Re: modified crankshaft in Netherlands |
Correct me if im wrong but i don't think that you can run an engine without the dog rings ... happy to be wrong but i think you would find that the primary gear would move on the crankshaft when you put your foot on the clutch , the clutch plate moves pretty freely on the primary gear but you would end up with the gear cutting into the alloy housing Nice drop Gears on the Gearbox |
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| Author: | drmini in aust [ Fri Sep 06, 2013 9:02 am ] |
| Post subject: | Re: modified crankshaft in Netherlands |
Beanie wrote: Correct me if im wrong but i don't think that you can run an engine without the dog rings ... happy to be wrong but i think you would find that the primary gear would move on the crankshaft when you put your foot on the clutch , the clutch plate moves pretty freely on the primary gear but you would end up with the gear cutting into the alloy housing You use the inner bronze thrust washer, and make a spacer one to go between the back of the flywheel and the primary gear, after trial pre-assembly with the flywheel fully torqued up. [edit] Can do this with helical drops too, just be VERY careful with the measurement of the new outer spacer to get .006" endfloat. |
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| Author: | Beanie [ Fri Sep 06, 2013 9:26 am ] |
| Post subject: | Re: modified crankshaft in Netherlands |
i guess that would work , so you need to have a Bronze bush made up to the thickness between the back of your flywheel to the front of the primary gear , so it really should be checked each and every time you put the flywheel on Is cracking through that spot on the crank a big problem , if a flywheel and or clutch assembly was out of balance sure , but in a built motor it shouldn't be a problem Beanie |
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| Author: | drmini in aust [ Fri Sep 06, 2013 11:19 am ] |
| Post subject: | Re: modified crankshaft in Netherlands |
It is a popular crank break spot on race motors.. the one I saw busted at Greig's was a near new MED 8 counterweight race crank I think. Even Vizard's yellow book from years ago states that it is a crack prone area, he suggested putting a radius in the bottom of the slot. But on a race motor and straight cut drops I'd do away with the slot. |
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| Author: | TheMiniMan [ Fri Sep 06, 2013 5:12 pm ] |
| Post subject: | Re: modified crankshaft in Netherlands |
yeah the Doc`s right,,, Stewys race crank (1600cc mini 91mm stroke) doesn`t have the "C-Lock" grooves either. & yes it is a spot to be aware of but generally not a problem for road minis |
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| Author: | mickmini [ Fri Sep 06, 2013 8:45 pm ] |
| Post subject: | Re: modified crankshaft in Netherlands |
Yeah, that is what i said to Carst. It is from his brother's race car 
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| Author: | kiwiinwgtn [ Sat Sep 07, 2013 6:55 pm ] |
| Post subject: | Re: modified crankshaft in Netherlands |
Did the flywheel stay in the casing.  Looks exspensive to fix |
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