View Poll Results: which connecting rod is the strongest?
Callies Compstar
47
14.92%
Oliver Billet
101
32.06%
Scat with ARP 2000 rod bolts
18
5.71%
Eagle forged
27
8.57%
Lunati pro billet
65
20.63%
Corrillo
57
18.10%
Voters: 315. You may not vote on this poll
strongest 6.125 rod?
Traditional I beams and Olivers specifically make good use of material to resist bending and tensile loads. The material to resist bending in a I-beam rod is placed as far out as practically possible from the centerline, making it more resistant to bending loads than a H-beam. As long as the I-beam has the same cross sectional area (Center of rod, not the ends) as the H-beam the tensile strength of both rods will be equal (Also, assuming the same material of course). In torsion I can see the advantage going to the H-beam. But, the load a rod sees in torsion is smaller, than the bending load. Being a Mechanical Engineer I'm still not sure why H-beams have gained their popularity due to previus reasons.
I'm currently running a set of Eagle H-beams with L-19s at almost 1100 RWHP(no problems so far), but will be changing them out over the summer for a set of Lunati's. The Lunati's have more cam clearance, which I need. I'm sure the Eagles will look fine upon dis-assemble as I have never killed a set rods due to failure of the rod itself. I'd really like to see if someone has tensile tested the material used in a Chinese Eagle rod compared to a quality US rod.
I'm currently running a set of Eagle H-beams with L-19s at almost 1100 RWHP(no problems so far), but will be changing them out over the summer for a set of Lunati's. The Lunati's have more cam clearance, which I need. I'm sure the Eagles will look fine upon dis-assemble as I have never killed a set rods due to failure of the rod itself. I'd really like to see if someone has tensile tested the material used in a Chinese Eagle rod compared to a quality US rod.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by chuntington101
very good points there TT632!
wonder id it a case or marketing that made people opt for H instead of I beam rods????
also very good point on the "quality" of the knock offs and the real thing.
Chris.
wonder id it a case or marketing that made people opt for H instead of I beam rods????
also very good point on the "quality" of the knock offs and the real thing.
Chris.
Just being truthfull though we have still had more problems with the I-Beam stuff by far at least from other shops. I am starting a thread elsewhere about it since we just got another set of one particular pretty expensive I-Beams again and the big ends are way out of round and these had a total cake walk of a life. The same engines with Eagle rods show like .0002 out of round or less and these are .0010-.0012 again and have to be resized. They cost 4 times as much as the Eagles though! I am going to see what their engineers say again.
On The Tree
Joined: Jan 2004
Posts: 166
Likes: 2
From: Bahrain
Originally Posted by racer7088
Seeing the H-Beam dominate for so long in NASCAR and also with other companies in the formula car and Superbike world like Pankl I don't think it was all marketing. A lot of it was Carrillo's awsome QC and materials and fastener patents. Then of course everyone copied them as a marketing tool probably. Nowadays you see both I and H Beams at all levels of racing. I know it's harder to machine the H-Beams as well and before especially in Ti but now several shops can so it but I-Beams are so much easier to make.
Just being truthfull though we have still had more problems with the I-Beam stuff by far at least from other shops. I am starting a thread elsewhere about it since we just got another set of one particular pretty expensive I-Beams again and the big ends are way out of round and these had a total cake walk of a life. The same engines with Eagle rods show like .0002 out of round or less and these are .0010-.0012 again and have to be resized. They cost 4 times as much as the Eagles though! I am going to see what their engineers say again.
Just being truthfull though we have still had more problems with the I-Beam stuff by far at least from other shops. I am starting a thread elsewhere about it since we just got another set of one particular pretty expensive I-Beams again and the big ends are way out of round and these had a total cake walk of a life. The same engines with Eagle rods show like .0002 out of round or less and these are .0010-.0012 again and have to be resized. They cost 4 times as much as the Eagles though! I am going to see what their engineers say again.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by Public Enemy
What do you think about olivers? are there like any other I-Beam or do they have more strength? i still haven't seen oliver billet rods fail.
Banned
Joined: Aug 2006
Posts: 326
Likes: 0
From: North Bay, CA
Originally Posted by racer7088
I don't know why but many Olivers we get go out of round on the big end after hard use. Don't know why? The Eagles don't. It's not a huge scientific sample and it's mostly stuff from other shops so who knows if it's even Oliver's fault truthfully.
I used compstars on my 347 build because I couldn't justify the cost of a lunati pro billet at only 700-800 horsepower or so...
When I build a stroker it'll either use lunati, howards, or grp rods with L-19bolts...probably the GRP's
When I build a stroker it'll either use lunati, howards, or grp rods with L-19bolts...probably the GRP's
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Originally Posted by Specialized
I hope you were joking on this statement?
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by john_sblendorio
How much HP can the Eagle rods handle?
Originally Posted by motorbuilt
I find that odd that it is said Eagle rods you use need alot of machining. The last 10 shortblocks I've done for customers have only needed one set slightly machined at very little cost.
carrillo rods are teh best on that list hands down.
cariillo dont rate there rods but thats what i used in a sb2.2 412ci 2 stage n2o engine that was going to make over 1500hp with both kits..i sold it and the last time i talked to the guy who bought the engine he said that the rods where fine when he freshend it and was going to put aluminum rods in it but after seeing the rods when the engine was apart he went with carrillos again.
i've seen them go into the 2000hp range in turbo apps on small blocks also.
cariillo dont rate there rods but thats what i used in a sb2.2 412ci 2 stage n2o engine that was going to make over 1500hp with both kits..i sold it and the last time i talked to the guy who bought the engine he said that the rods where fine when he freshend it and was going to put aluminum rods in it but after seeing the rods when the engine was apart he went with carrillos again.
i've seen them go into the 2000hp range in turbo apps on small blocks also.
I think all the rods are good pieces. The real question should be - Has anyone had a rod failer, and what rods were they? And at what HP? Most importanly, what rod bolts?
Ron
Ron