Brought to you in part by:

Great deals on auto restoration supplies!

.


JC Whitney clearance center!

  Mustangsandmore Forums
  Ford Racing
  polishing beams on connecting rods......

Post New Topic  Post A Reply
profile | register | preferences | faq | search

next newest topic | next oldest topic
Author Topic:   polishing beams on connecting rods......
XR7
Gearhead

Posts: 129
From: north Idaho
Registered: Mar 2003

posted 03-12-2003 10:30 PM     Click Here to See the Profile for XR7     Edit/Delete Message   Reply w/Quote
Is it worth doing? Does it reduce that much stress? If you do this to a stock rod can you run them polished or do you have to shotpeen them? I have heard of guys glass beading them after also although one engine builder said that wouldn't help one bit. I am considering doing this on my FE rods and using ARP2000 bolts, reconditioning and balancing them ect. I just can't find anyone that can do it (shot peen) locally and hear it is very expensive. Not that many options for aftermarket FE rods that are affordable.

IP: Logged

SundanceKid
Gearhead

Posts: 1260
From: UT
Registered: Feb 2001

posted 03-13-2003 12:46 AM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
I have "heard" that is is worthless without shotpeening them. When you polish the beams it would stop stress risers and that does help on anything metal that involves stress. Why would rods be any differant?
I have polished the stock rods on every motor I have built and have never had them shotpeened. I've never had a rod failure, so it hasn't hurt anything by doing it so far.

IP: Logged

Mario428
Journeyman

Posts: 76
From: Charlottetown, PEI, Canada
Registered: Nov 2001

posted 03-13-2003 06:57 AM     Click Here to See the Profile for Mario428   Click Here to Email Mario428     Edit/Delete Message   Reply w/Quote
Try George Anderson at http://gessford.com/cobraparts/enter.htm
He polished and shotpeened my rods, does nice work. Does a lot of FE stuff.

IP: Logged

n2oMike
Gearhead

Posts: 2419
From: Spencer, WV
Registered: Jan 2001

posted 03-13-2003 10:11 AM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
If you're going to polish the beams, you've got to be careful not to remove too much metal. You can actually end up weakening the rods.

For the record... The 289 rods in mustang's 302 did NOT have their beams polished. They had good machine work, ARP Pro-Series bolts, and were shot peened.... but that's it. The pistons were press-fit, not bushed, as I feel this takes too much metal out of the small ends of the stock rods.

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
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220

IP: Logged

Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-13-2003 10:36 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Polishing stock SBF Ford rods gains nothing.
Not enough mass to make a difference.
Like Mike suggests, "good" precision machining, good bolts, and shot peening does the trick.

As far as bushing the small ends, I dissagree.
For over 30 years I have been bushing the small ends of stock SBF rods for floating pins. Both 5/16 and 3/8 Hipo, Boss, and 302HD rods. I have never had a pin end related failure! Broke plenty of rods, but never on the small end.
There is plenty of material and you can see a significant RPM response improvment with full floating pins on a "race" engine. This translates into a quicker ET.
Under 6k RPM I wouldn't bother.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

IP: Logged

Rustang1
Gearhead

Posts: 110
From:
Registered: Nov 2000

posted 03-13-2003 04:49 PM     Click Here to See the Profile for Rustang1   Click Here to Email Rustang1     Edit/Delete Message   Reply w/Quote
One option to the floating pin deal is running them "steel on steel" honing the rod bore out for a clearance with the wrist pin and then drilling small oil hole at or near the top of the bore.
As for the shot-peening, I have a copy of some engineering paper from Chevy that shows how much stronger their bow tie rods were after shot-peening. It's something on the order of 30%! It's kind of a cool paper. I can scan it and email a copy of it if you wish. Also, don't use glass beads, as they wouldn't "compress" the surface like the steel shot would.

------------------
1968 Mustang,Clevor,C4
1969 Torino 351C 4spd
1978 F150 460 C6
1978 F150 351W C6

IP: Logged

Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-13-2003 06:29 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Rustang1:
One option to the floating pin deal is running them "steel on steel" honing the rod bore out for a clearance with the wrist pin and then drilling small oil hole at or near the top of the bore.


Done that many times also. The little Ford rods are better than you think.
Big bonus is the light weight.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

IP: Logged

Stephen & Horace Johnson
Gearhead

Posts: 184
From: Gadsden, AL
Registered: Jul 2002

posted 03-14-2003 01:01 PM     Click Here to See the Profile for Stephen & Horace Johnson   Click Here to Email Stephen & Horace Johnson     Edit/Delete Message   Reply w/Quote
XR7

They work for the ole Lemans rods.. we used to do them to our rods.. but now we run the ole Crower.. gosh expensive.. The ole Lemans rods are HEAVY!!! but they can be lightened but.. the motor will have be torn down and check after about 35-40 runs to check for cracks.. We have some rods for the 427s if you need any.. [email protected]

------------------
Stephen Johnson #2162
Horace Johnson #2167
NHRA-IHRA SS/D 427 Ford Fairlane (Ex-Van Cleve)
1985 Mustang FFW True Street 11.86 @115mph (N/A)

IP: Logged

XR7
Gearhead

Posts: 129
From: north Idaho
Registered: Mar 2003

posted 03-14-2003 07:23 PM     Click Here to See the Profile for XR7     Edit/Delete Message   Reply w/Quote
Thanks for the replies and advice! I like this forum, lots of experience in drag racing and engine building. I will try to find someone in the northwest for the shotpeening as George at Gessford won't do it unless he polishes the rods and I allready did! He quoted 412 labor plus the bolts and bushings for your info.

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2005, Steve LaRiviere. All Rights Reserved.


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[Posting Pictures]

[About M&M][Acronyms][Calendar][Chat][Classifieds] [Members' Pics]

[M&M Conventions] [M&M Mug Shots]

[ Mustangsandmore.com Bookstore] [ Smokin' Fords] [Tech Articles]