Quote:
Originally Posted by DRJDVM's '69
The cam is a "standard" (i.e not billet etc) Comp Cam and the distributor gear was the stock MSD piece....
I dont know what the cam gear looks like but I assume its trashed too....... I kinda want a diff cam anyway since this one didnt lope or sound as mean as I was hoping.... the 434 ate it up and it sounded too mellow to me anyway....
I did an internet search and found out alot about the melonized gears....seems to be a common choice...... but not everyone agrees.... seems like a billet cam with pressed on cast gear with the meolinized dist gear seems to work for alot of guys..
I went onto the MSD site and there were quite a few posts about gear failure....mostly Fords..... some "possible causes" were excessive endplay, high volume oil pumps and some other crap....no real specific casues... the scary thing is that there were posts with mulitple failures.... I really dont want to keep doing this.....
One of the theories is about high volume or high pressure oil pumps.... my engine builder put in a custom built oil pump that he swears by.... he runs on in his car and so does my friend with no problems......the oil pressure is around 20 at idle and often in the 70's at highway.... I've never had oil pressure that high....
I just dont want to do this again .....
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trust me Ned. If the cam has the iron gear for a standard dist gear, use Mikes melonized gear. The MSD has had many problems with failures on Chevy's too, been through it myself.
The cam gear is likely okay, but now's the time to change if you want to. I prefer the billet cams with the iron gear pressed on, especially if you're running a higher rpm and more spring pressure. The standard hydraulic roller blanks are soft in my opinion, seen several that the roller lifter actually dents the lobes.
Jody