Where can I get schooled on Connecting Rods?
+ Reply to Thread
Page 1 of 4 1 2 3 4 LastLast
Results 1 to 14 of 47

Thread:
Where can I get schooled on Connecting Rods?

  1. #1
    Icy
    Icy is offline
    Boatless Member :( Icy's Avatar
    Join Date
    Aug 2009
    Location
    AV, CA
    Posts
    3,006

    Default Where can I get schooled on Connecting Rods?

    How can you tell what is the best strength. How do you balance strength with weight?

    Even if you pick say H's with 6.135in'' there is many many options varying from prices of $300 to $900 and I can't really tell any difference between them. Alloys are the same but weights are different. Does weight drive price? Is the strength compromised with the reduced weight?

    Or we can just get the point, what do you guys run in SS-spec motors?

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Nov 2009
    Location
    Jerome, Idaho
    Posts
    1,739

    Default

    A lot depends on what your trying to achieve with your engine! When it comes to rods I prefer Carrillo's with SPS Carr bolts, mainly because I've run them for ever with no issues!!!!!

    My opinion only!!!

  4. #3
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default

    Quote Originally Posted by Icy View Post
    How can you tell what is the best strength. How do you balance strength with weight?

    Even if you pick say H's with 6.135in'' there is many many options varying from prices of $300 to $900 and I can't really tell any difference between them. Alloys are the same but weights are different. Does weight drive price? Is the strength compromised with the reduced weight?

    Or we can just get the point, what do you guys run in SS-spec motors?
    Is there a spec on the rod? Never built a SS spec motor, but if I did, I think I'd feel safe using just about any reputable forged H beam rod with a good bolt. Kinda depends on the piston and rpm. Price has a lot to do with label. I can get the same rod, from the same manufacturer anywhere from under $600, to over $800 for a BB Chev, depending on who's name is on it (quality rod). If you look at I beam rods, Crower will work with a customer on building a rod for the application.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member wagspe208's Avatar
    Join Date
    Apr 2008
    Location
    waterloo
    Posts
    2,034

    Default

    You can get schooled on damn near anything around here. Just ask a question, make a statement, etc.
    Wags

  7. #5
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,573

    Default

    Quote Originally Posted by wagspe208 View Post
    You can get schooled on damn near anything around here. Just ask a question, make a statement, etc.
    Wags
    you can't say that in here or you'll get dq'd. and don't take a hand off that wheel or you'll get dq'd; bein in the pits is no excuse. and flip that visor down or you'll get dq'd... or up.. whatever it is, do it the other way or you'll get dq'd...

    sorry, no thread jack intended. carry on. or get dq'd...

  8. #6
    Icy
    Icy is offline
    Boatless Member :( Icy's Avatar
    Join Date
    Aug 2009
    Location
    AV, CA
    Posts
    3,006

    Default

    Quote Originally Posted by steelcomp View Post
    Is there a spec on the rod? Never built a SS spec motor, but if I did, I think I'd feel safe using just about any reputable forged H beam rod with a good bolt. Kinda depends on the piston and rpm. Price has a lot to do with label. I can get the same rod, from the same manufacturer anywhere from under $600, to over $800 for a BB Chev, depending on who's name is on it (quality rod). If you look at I beam rods, Crower will work with a customer on building a rod for the application.
    It just has to be OEM or Steel. Doesn't specify an alloy... Pretty open to shapes it seems...

    53.10 Connecting Rods.
    Any stock OEM or steel aftermarket rod may be used. It may be ground, polished, bushed and shot peened. Oil holes in the small end of the connecting rod may be added. Rod length = 6.135 +/- 0.010.
    Last edited by Icy; 08-09-2012 at 10:00 PM.

  9. #7
    CP-Carrillo Piston Maker's Avatar
    Join Date
    Apr 2009
    Location
    In the Dungeon
    Posts
    297

    Default Carrillo

    My suggestion is to contact the manufacturers and ask them that question. Although customer service and price could easily modify your opinion, facts are facts and product history says it all. If it's a shelf rod, those are often designed for many race applications and not designed specifically for your application. That alone could mean the rod is heavier than you really need it to be.

    Unfortunately to have a custom rod made for certain types of racing costs more, but it allows the design to be calculated for exact usage. Then, to take it a step further, designing a complete package is advantageous because you can optimize everything around each other....pins for instance, can be smaller in diameter, shorter, lighter, of course used with the latest forged side relief piston forgings ("X-Style"). Small end widths on the rod can be narrower at that point, which in turn allows the beam to be narrowed...

    One thing we've worked hard on the last 3 years is optimizing complete packages from Pro Stock to NASCAR.

    For inquiries on Carrillo Rods, you can call Richard Bachelor at 949.567.9000 and tell him you're a PB member and Piston Maker referred you.

    Also, Carrillo offers reconditioning programs for rods and they can be sent back in for mag, bend and twist evaluation, re-hone, etc.....

    Company history/tour: Inside CP Carrillo - Motocross Videos - Vital MX

    Product info (pg 66 - 106): http://cp-carrillo.com/LinkClick.asp...HU%3d&tabid=82

  10. #8
    Senior Member Ronboats's Avatar
    Join Date
    Jun 2009
    Location
    Norcal-Santa Rosa
    Posts
    612

    Default

    Quote Originally Posted by Icy View Post
    How can you tell what is the best strength. How do you balance strength with weight?

    Even if you pick say H's with 6.135in'' there is many many options varying from prices of $300 to $900 and I can't really tell any difference between them. Alloys are the same but weights are different. Does weight drive price? Is the strength compromised with the reduced weight?

    Or we can just get the point, what do you guys run in SS-spec motors?
    Dude...You will NEVER get a real answer here that you can take to your machine shop to tell them what should be done. What you WILL get is every kind of half-answer that will still leave you guessing.If you cant find a reputable guy to guide you who you can talk to in person, I suggest asking the crowd from CFW in the v-drive section. They are real good guys who dont have an ego to massage-JUST MY OPINION!

  11. #9
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by Ronboats View Post
    Dude...You will NEVER get a real answer here that you can take to your machine shop to tell them what should be done. What you WILL get is every kind of half-answer that will still leave you guessing.If you cant find a reputable guy to guide you who you can talk to in person, I suggest asking the crowd from CFW in the v-drive section. They are real good guys who dont have an ego to massage-JUST MY OPINION!
    After reaing this thread I can't see where he got a half baked answer. Its all pretty simple really.
    Low end scale: Scat, Eagle, K1, or Engine Pro.... no lower or you'll wish you hadn't.
    We all could list every rod top to bottom from ProCrap to Carrillo and Lentz. What good would the time take. Think the OP is interested in a set of 2500.00 rods. If he was, I doubt the question would even get asked.

    If he is interested in a rod in the 900.00 range, then he should ask that specific question. Not why do rods run from 300 to 900.

    AND THE ALLOYS ARE NOT ALL THE SAME REGARDLESS WHAT THEY TELL YOU.

    4340 has gotten to be a very ambiguous term. Like "up" or "old" or my favorite "expensive"



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  12. #10
    Senior Member Ronboats's Avatar
    Join Date
    Jun 2009
    Location
    Norcal-Santa Rosa
    Posts
    612

    Default

    Quote Originally Posted by gn7 View Post
    After reaing this thread I can't see where he got a half baked answer. Its all pretty simple really.
    Low end scale: Scat, Eagle, K1, or Engine Pro.... no lower or you'll wish you hadn't.
    We all could list every rod top to bottom from ProCrap to Carrillo and Lentz. What good would the time take. Think the OP is interested in a set of 2500.00 rods. If he was, I doubt the question would even get asked.

    If he is interested in a rod in the 900.00 range, then he should ask that specific question. Not why do rods run from 300 to 900.

    AND THE ALLOYS ARE NOT ALL THE SAME REGARDLESS WHAT THEY TELL YOU.

    4340 has gotten to be a very ambiguous term. Like "up" or "old" or my favorite "expensive"
    Like I said NO REAL ANSWER! GIve a single choice that you think will suit his needs and THAT is an opinion. listing a variety of options is not much help to non-machinists who dont have the schooling to sort it out. If you need more info to give that opinion,then ask him for it. Once again-JUST MY OPINION.
    And I think thats what he wants from you....Not endless options

  13. #11
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by Ronboats View Post
    Like I said NO REAL ANSWER! GIve a single choice that you think will suit his needs and THAT is an opinion. listing a variety of options is not much help to non-machinists who dont have the schooling to sort it out. If you need more info to give that opinion,then ask him for it. Once again-JUST MY OPINION.
    And I think thats what he wants from you....Not endless options
    Carrillo.
    Think thats what he wants to hear.
    A budget would be more than helpfull here. Intended HP, and use wouldn't hurt to know.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  14. #12
    Senior Member Ronboats's Avatar
    Join Date
    Jun 2009
    Location
    Norcal-Santa Rosa
    Posts
    612

    Default

    Quote Originally Posted by gn7 View Post
    Carrillo.
    Think thats what he wants to hear.
    A budget would be more than helpfull here. Intended HP, and use wouldn't hurt to know.
    Touche-Your right ,but he might not know to give that info-just sayin'
    I know from my time on this site that you know your stuff,but sometimes it's hard to get a clear answer out of you.You just seem to know more than most of us.(more than me at least)And give so many options it can leave a person with as many questions as before.I always try to absorb your info,but a direct opinion is much easier to work with.

  15. #13
    Icy
    Icy is offline
    Boatless Member :( Icy's Avatar
    Join Date
    Aug 2009
    Location
    AV, CA
    Posts
    3,006

    Default

    I was basically trying to price components for an SS motor.

    I've built some engines in the past, but I didn't do the part selection.

    I understand meteorology pretty well (taken a few courses on it) and I'm also a engineer/machinist but the information provided on these websites are useless to me.

    They give an advertised RPM range, nothing about load or horse power. The material is generally the same every time which I don't really trust and the only difference is the grams which tells me that some have more material than others.

    I know so little about connecting rods that if there was a 200 page book I'd read it so that is what I meant by "getting schooled".

    If anyone that's built an SS motor wants to tell me what they use and why it would be appreciated.

  16. #14
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    I know. Some of us can be finicky little bastards. You should see the look on my doctor's face when I tell I hurt. Now that guy is completely unreasonable for what he gets paid.

    But I will try to make this very simple.
    If its a rod for a SS, then get a set of Eagle H beams with ARP 2000 bolts and try as hard as you can to make enough HP to tear the rod in 2. If you manage, congradulations. You have now built and destroyed the most powerfull SS engines in history.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
    Last edited by gn7; 08-12-2012 at 10:29 PM.

+ Reply to Thread
Page 1 of 4 1 2 3 4 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95