cam shaft replacement
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Junior User
Joined: Oct 2003
Posts: 51
Likes: 0
From: kelowna canada
cam shaft replacement
Recently found out cars and trucks with 390 motors have diffrent distributers gearing at least , now I have to replace the cam as it eats the drive gear off the distributer end . My carb is an edelbrock 650cfm , motor is a stock 390 out of a 66 ltd . What would be a good cam for this application ? motor was only on the street a short while seemed to make pretty good power , top end has significant wear rod & mains are worn but seem alright . thanks in advance for your info .
ktownford
68F250 4x4 390
ktownford
68F250 4x4 390
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Something sounds fishy here. I have never heard of different dist. for any regular FE (not including 361 or 391's)
Does it hurt the dist. gear also?? Just the cam gear??
I think there is different issues.
Is there a new oil pump in this motor??
Larry
Does it hurt the dist. gear also?? Just the cam gear??
I think there is different issues.
Is there a new oil pump in this motor??
Larry
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
You may have a bad gear on the cam. There is absolutley no difference in distributor gears on the FE engines. Some of the comp cams have had this problem in the past. They were eating distributor gears.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
My Crane roller cam required a hardened steel or bronze dizzy gear.
It has to do with the cam material. But, I think you would have to get a roller or radical flat tappet cam to need the upgraded gear.
Maybe somebody upgraded your dizzzy gear in the past to work with a harder cam?? And now it's too hard for your cam.
It has to do with the cam material. But, I think you would have to get a roller or radical flat tappet cam to need the upgraded gear.
Maybe somebody upgraded your dizzzy gear in the past to work with a harder cam?? And now it's too hard for your cam.
