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 ID original rod 69 400 pont. ?
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bober
Sitting Bull

142 Posts

Posted - 29 Jun 2014 :  12:01:59 PM  Show Profile  Reply with Quote
The 400 is .030 over w/L2262 piston and N97954 crank but I can't get a look to tell what rod , Appears to be I beam like orig. so is it prob Pont rod ? Yhanks

bigD
Indian Spirit

USA
643 Posts

Posted - 29 Jun 2014 :  12:48:53 PM  Show Profile  Reply with Quote
There is a real good pic of a stock cast rod just past half way down the page at the link below. There is also a pic of a forged '73-'74 455SD rod just below the cast rod.

http://www.cartechbooks.com/techtips/pontiacshortblockinformation/

The Chinese forged 5140 rods look similar, but you can easily see the differences.

http://www.competitionproducts.com/5140-I-Beam-Rods-Pontiac-6625-Press-Pin/productinfo/4556/#.U7BE_JRdVZ4





Better rods use cap screws instead of bolts with nuts. This is a Tomahawk rod.


HPP has an article about rods, with lots of pics.

http://www.highperformancepontiac.com/tech/hppp_1201_connecting_rods_for_pontiac_v8s/

Edited by - bigD on 10 Jul 2014 11:25:55 PM
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bnorris_74
Crazy Horse

USA
1442 Posts

Posted - 06 Jul 2014 :  07:13:09 AM  Show Profile  Reply with Quote
TTT
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bober
Sitting Bull

142 Posts

Posted - 07 Jul 2014 :  08:11:19 AM  Show Profile  Reply with Quote
I have a # off the rod #313 if that means anything ?
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bober
Sitting Bull

142 Posts

Posted - 08 Jul 2014 :  11:02:32 PM  Show Profile  Reply with Quote
Seems there's a diff # on each one but I'm sure there just reg. cast rods .Thanks
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Mr. P-Body
Running Bear

USA
2258 Posts

Posted - 10 Jul 2014 :  7:46:37 PM  Show Profile  Visit Mr. P-Body's Homepage  Reply with Quote


If there's a "parting line" down the side of the beam, and it's very narrow (that IS a good pic, bigD), it's a casting. The spurt-hole indicates an earlier production ('64-'68, IIRC). If there's a wider line (maybe 3/16-1/4"), it's a forging. If it's a factory forging, chances are it's not a "good" one. Those got used up LONG ago...

The forged rod pictured is an old C.A.T. rod. You can see the logo on the side. These are no longer available. It's okay. While better than a cast rod, not a real GOOD rod. The RPM forgings available today are much nicer rods for the same price range. They're also marketed under the name "Tomahawk". The 5140 forging is better than any of the factory rods, possible exception the 421SD. The RPM 4340 I-beam is also a VERY good rod, but more money. Eagles are "next" in the pecking order. Unless you're racing at a high level, Eagles are as good a rod as you will ever need.

FWIW

Jim
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