[Land-speed] Bad vibes

[J.D. Tone]

Don, Make sure threads are not aganst the flywheel and shoulder of the bolt 
is. I use Pontiac flywheel bolts on my GMC because of this. They need to be 
shortened and the heads made thinner. I do this by grinding. Until I 
installed 3 3/8' dowels I had some of the problems you described. The dowels 
elimenated the problem..Good Luck

Subject: [Land-speed] Bad vibes


> Anyone silly enough to cut an engine in half should probably expect  to 
> encounter some "unusual" problems along the way. During a recent  dyno 
> pull, our half Windsor (3 liter inline four) sheared off all six  Locktite 
> secured 7/16" ARP flywheel bolts, and almost welded the  flywheel to the 
> crank. Seems that we have a harmonic vibration  problem that has created 
> more force than our system can tolerate.  So.......... we probably need to 
> strengthen the parts and reduce the  "bad vibes".