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Author Topic:   Rod beam polishing
V8 Thumper
Gearhead

Posts: 4413
From: Phoenix, Arizona
Registered: Dec 2001

posted 12-25-2001 06:07 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Until I can afford h-beams, I would concider 'polishing' my 289's stock rods myself; anyone know of a site or link I could use to educate myself on the do's and dont's?

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Just Strokin
Gearhead

Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 12-25-2001 06:21 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
I don't know of a site, but a few tips...

1) Grind in the direction of the grain, not across rod. ex., big end to little end.

2) it is a lot of work with hand tools such as a die grinder. A burr works better than a stone.

3) use old rod bolts to protect the mounting pad for the bolt.

4) grind off only enought to get the casting off and smooth.

5) lastly, make sure you re-balance the rods and your rotating assembly.

I did a set once and it was a lot of work. Do I think it helped? Not a bit since I was turning under 7000.

Have fun, it is something that will keep you busy during the winter months.

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n2oMike
Gearhead

Posts: 2499
From: Spencer, WV
Registered: Jan 2001

posted 12-25-2001 06:58 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
Just don't grind too deeply. Smoothing is all you need to do. You're main goal is to eliminate potential stress risers that could lead to future cracks.

If polishing... polish first, then shot-peen. Not the other way around.

I didn't even fool with polishing the beams of the 289 rods in my current engine. However, they DID get shot-peened and recieved ARP wavelock bolts.

Good Luck!

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367

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futurattraction
Gearhead

Posts: 108
From: Iowa City, IA
Registered: Oct 2001

posted 12-25-2001 08:26 PM     Click Here to See the Profile for futurattraction   Click Here to Email futurattraction     Edit/Delete Message   Reply w/Quote
Here is a site from Standard Abrasives. It covers much more than rod prep, but there is a section of it that deals with rod beam polishing. Hope it helps!
Scott

http://www.sa-motorsports.com/blockdiy/blkdiy.htm

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