528 CID Big Block Ford Engine Build - Page 4

**blykins** · 03-09-2009, 04:38 AM

Are you in KY? I'm in Louisville.

**dfree383** · 03-09-2009, 06:22 AM

Quote:

Originally Posted by blykins

Are you in KY? I'm in Louisville.

No, East Coast Right now, Just have Friends in KY.

**blykins** · 03-09-2009, 08:35 AM

I thought your username looked familiar...I'm on Speedtalk too.

**dfree383** · 03-09-2009, 08:42 AM

Quote:

Originally Posted by blykins

I thought your username looked familiar...I'm on Speedtalk too.

Yea, I think i've run accross you over their a time or two.

**frdnut** · 03-09-2009, 09:56 AM

How in the heck did you notice the #5 cam bearing going bad?

**dfree383** · 03-09-2009, 02:07 PM

Oil Pressure Fluttered, Motor Started Loosing Power, Stopped, Cut the filter apart and Found "Bad Metal" Metal.

**n2omike** · 03-10-2009, 06:01 AM

The cam bearings in 460's are very narrow. Once the spring pressure and cam aggressiveness gets too high, the bearings fail to hold up. The ultimate cure is a roller bearing conversion, but there is also a stop-gap fix out there...

There is a wider bearing out there. 351C bearings are wider, but you can't use the entire set. I don't remember the specifics, but if you look up the OD's and ID's of both the 351C and 460, I believe you'll find what you are looking for. (maybe use one bearing out of each set)

At one time, I believe a guy on 460 Ford Forum - Powered by vBulletin was selling these matched up sets. Anyway, it is possible to use a wider bearing on these 460's.

Good Luck!

**dfree383** · 03-10-2009, 07:33 AM

I had a Clearance Issue, Ended up finding the Cam Journal to be on the high side, Housing bore to be on the high side too, resulting in a stacking of high side tolerances giving #5 a tight fit that didn't feel bad when fitting the cam but odviously a problem. Lesson learned, Measure everything, Don't Rely on Feel and HP Cams Need .002-.003+ Clearance.......

Had the Wider Cam Bearings in the Motor + Roller Cam bearings have issues and a down side too, but you are right they do have a place and an application.

**Silverliner** · 04-09-2009, 09:00 AM

I've been running an IDT Premier based 580" BBF with roller cam bearings for three years now as a street/strip deal including two Hot Rod Drag Weeks and any number of True Street drive to track, race drive home deals. I was worried initially about the cam bearings due to internet 'horror" stories. But they have fuctioned flawlessly. I also run a Peterson external pump set-up. First version of engine made 820 at the crank and a subsequent manifold change increased PMH by 5 so it gained, Valve springs are just shy of 300 on the seat and with 1.8 rockers there is a lot of pressure on the cam. I suspect I would have had cam beraing problems by now without the roller cam bearings. If you are at the aftermarket block phase then I would consider them essential.

**dfree383** · 04-28-2009, 05:14 AM

Machine work is Complete on the New Block, Should be together in the next few weeks and back on the Dyno.