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| +100 GR 1100 pistons hit dissy drive https://ausmini.com/forums/viewtopic.php?f=5&t=74485 |
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| Author: | stevethepom [ Sun Dec 04, 2011 7:57 pm ] |
| Post subject: | +100 GR 1100 pistons hit dissy drive |
Hi Guys , just started putting my 1100 motor back together and have come across a few clearance issues. I have a 998 block which has been bored out +100 to except GR 1100 pistons , i am using a reground 1098 crank , the problem is the dissy drive is hitting the bottom of the piston skirts . I have heard that i may need to machine down the dissy drive but it seems that it would have to be awfully thin to clear the piston skirts . Does anyone know what the best way to fix this is , i would have thought someone has come across this before ? |
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| Author: | drmini in aust [ Sun Dec 04, 2011 8:02 pm ] |
| Post subject: | |
Yes just machine the dizzy driveshaft down, quite safe, there is a pic in Vizard's book. Wombat had this same problem with his build. 5/16" is the recommended shaft dia I think, I'll check in da Viz book. 
[edit] No pic shown in book, but p438 in my book says machine dizzy drive shaft down to 5/16". Reduces wear on the dizzy bearings he says. |
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| Author: | Wombat [ Sun Dec 04, 2011 8:47 pm ] |
| Post subject: | |
Just the middle section - leave the ends so that it sort of looks engine valves on each end |
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| Author: | simon k [ Mon Dec 05, 2011 9:44 am ] |
| Post subject: | |
bah, set it up with crank fired ignition, throw the dizzy drive away completely 
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| Author: | TheMiniMan [ Mon Dec 05, 2011 2:10 pm ] |
| Post subject: | |
yeah, same thing with my 1510cc engine, needed to skim the dizzy-shaft down heaps, no problem tho, easy-peasy |
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