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Author Topic:   connecting rods
Dirt Roller

Total posts: 15
posted June 19, 2001 03:41 PM
I am in the process of building a 408 sbc. I ordered a new 4340 steel crank, and I am going to use SRP pistons. I have had good luck with H-beam rods in the past, however, there is a considerable weight difference between the H-beam and I-beam rods. My question is how do I-beam rods with the cap***** type rod bolt hold up under racing conditions? I am currently running a 360 ci engine with the H-beam rods and having good luck (7600 to 8000 rpm) knock on wood...I want to go bigger cubic inch and cut down on the rpm's a tad..Any comments are appreiciated.

Dirt Maniac

Total posts: 103
posted June 23, 2001 07:19 AM
I have always used I-Beam rods. I have one motor that we are running now that has a set of Crower Sportsman 4340 steel rods that are ten years old. I replaced the rod bolts in them a couple of years ago and had them checked for any other problems and they where fine. I had a 383 that I ran for one season. It had a set of the Lunati Street/Race 4340 rods in it. I turn both of these engines 7000 rpm with no failure.

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