Rod Bolts
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Rod Bolts

  1. #1
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    Default Rod Bolts

    Im buying a set of BBC 3/8's rods on here. What would the power restriction be after putting in some ARP wave locs. Motor is going to be a "ski boat" motor for a jet. I think i have a set of ARP2000's laying around.

    4-bolt 454
    Gm forged crank 4.00
    single plane intake
    maybe some aluminum heads or a set of 049's
    750 ish quickfuel carb

    I don't plan on running the motor to hard, just a good ski, tube, cruising motor. I might put my foot in it once in a while.

    Should I step up to 7/16 for the insurance?

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Well, IMO the bolts you intend to get are plenty.

    I rebuilt my 2-bolt 1978 454 with 3/8" ARP Wave-Locks (the 8470 (r is it 8740, I never remember)) alloy steel and had them reconditioned.

    I run 5400 RPM off nitrous against an Aggressor B impeller, 5900 on the gas, in a heavy old Taylor SS lake cruiser ski boat.
    According to the charts, that's 500 and 650 HP ballparks, 4 years of running, no problems.

    You do not need to go bigger IMO.
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    Sit N' Spin Jetaholic's Avatar
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    With the cost of the rods themselves, the rod bolts, then having to pay a shop to install the bolts and resize the rods you'd be money ahead to just by a brand new set of aftermarket rods. They'll come with the fasteners and in all cases...have the shit checked for size and balance and corrected if need be.
    Last edited by Jetaholic; 07-19-2009 at 09:49 PM.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Quote Originally Posted by Jetaholic View Post
    With the cost of the rods themselves, the rod bolts, then having to pay a shop to install the bolts and resize the rods you'd be money ahead to just by a brand new set of aftermarket rods. They'll come with the fasteners and in most cases will be sized and ready to go out of the box.
    Yeah I have thought of that. I get everything at dealer cost to boot. These are already hung on mint TRW forged pistons for $150 for the set. Hard to beat that, considering I don't keep anything for more than
    6 months

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    Quote Originally Posted by Blue View Post
    Yeah I have thought of that. I get everything at dealer cost to boot. These are already hung on mint TRW forged pistons for $150 for the set. Hard to beat that, considering I don't keep anything for more than
    6 months
    Well I hope they work for ya. FYI, the rods will have to be removed from the pistons in order to resize them once the new bolts are installed.

    Which TRWs are they? With the TRWs I wouldn't have the bigger valves installed in the 049s (another thing I learned the hard way). The reliefs in the ones I ran were not radiused big enough for them and there wasn't enough material on the piston deck to have them fly cut for them.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

  8. #6
    I'm No Expert Shaun's Avatar
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    Quote Originally Posted by Jetaholic View Post
    ready to go out of the box.
    Negetive there, always have them checked! I think it cost me 20 bucks to have them dusted and i kicked the guy down another 20 because he did it while i waited!


    If you have bolts laying around dont go out and buy new rods with bolts, like i said above your going to have to have them checked anyway. Not sure if taking the pistons off the rod is required for resizing but if it is and these are pressed be careful who you let do it. I was told it's alot harder to press a pin out of a piston than it is to press one in. On my last motor this is what killed it, i had a shop swap the pistons from one rod set to another and they gouged 3 of the pistons, i ended up burning up the pins. When you get them back, make sure all the pistons move on the rods easily with the same amount of force!!

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    Sit N' Spin Jetaholic's Avatar
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    I got my whole rotating kit through my machinist, so as soon as they arrived at his shop my rods and crank as well as the pistons were checked to verify they were on size. Plus, when you get new rods you gotta take them in to balance/verify balance anyway so have them checked while the machinist has them.
    Last edited by Jetaholic; 07-19-2009 at 09:47 PM.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Quote Originally Posted by Jetaholic View Post
    That was why I said "In MOST cases...". I got my whole rotating kit through my machinist, so as soon as they arrived at his shop my rods and crank as well as the pistons were checked to verify they were on size. Plus, when you get new rods you gotta take them in to balance/verify balance anyway so have them checked while the machinist has them.
    So maybe you should not of posted "ready to go out of the box"!!

    I sent my crower crank in to lopez when i Bought it, spent another 125 to clean it up to "get it ready to go out of the box"...lol

    Same with my rods, cost me about 30 bucks to clean up and check before they were "ready to go out of the box"


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    jetaholic, if i've learned anything so far... it's that nothing is ready to go out of the box when it comes to engine building.

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    Quote Originally Posted by Shaun View Post
    nothing is ready to go out of the box when it comes to engine building.
    Words to live by!

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    The only thing thats "ready to go out of the box" is the box.
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    Sit N' Spin Jetaholic's Avatar
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    I agree 100%. Never ASSUME that it's right...Always have shit checked, or if you're good with micrometers check it yourself. Post edited

    On mine, everything was on size, but some had to be taken off the counterweights to balance.

    Had I'd bought the kit from elsewhere, I would have taken everything to the machinist to verify size and balance.
    Last edited by Jetaholic; 07-19-2009 at 09:48 PM.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

  15. #13
    I'm No Expert Shaun's Avatar
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    With rods, checking them with a 2 post bore guage is hard to see tenths accuratly when trying to see if the big end is round. The rod shop wont charge you much to check them, like i said, cost me 20 bucks (well 40 since i kicked him down a 20) to have him check and dust them.

  16. #14
    Sit N' Spin Jetaholic's Avatar
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    You know Shaun, it's interesting the subject of having new rods checked even got brought up. A friend of mine has a Ford 460 that he's been battling with since last season. Here is the history of the motor -

    On a WFO run he came outta the water and unloaded, afterwhich he developed a 'knock' and had no oil pressure. Decided to limp it back at 1500 RPM with no oil pressure...#4 rod was ripped from its piston (he thought he had forged pistons...found out he actually had hypereutectics) and sent through the #8 cylinder.

    Replaced block, pistons, a couple rods and the crank.

    Rebuilt #1 - lost oil pressure. Teardown revealed the rod bearings were fine but the mains were shot. Block needed an align hone. #1 cam bearing spun...this is where it gets funny. While he was building the motor, he had two boxes of cam bearings on the bench. One set were for his motor while the other set was for an FE block. Grabbed the wrong box...didn't check the part number. He kinda thought they went in a little on the loose side but wanted to get the thing running so he rushed it and didn't worry.

    Rebuild #2 - He had his heads converted to an adjustable valve train, roller rockers. He thinks a poly lock came loose...I speculate that he may have forgotten to tighten one of them. Needless to say, rocker came loose, then the lifter came out of the bore and he lost oil pressure. #2 and #6 rod bearings were the first to go. Come to find out...THE ROD BIG ENDS WERE TOO TIGHT! He figured since they were brand new rods that they didn't need to be checked.

    Rebuild #3 - Had the rods resized, replaced crank (again...he seems to have an abundance of Ford cranks laying around) and installed a stud girdle. He got it on the water yesterday and ran it about 30 miles...seemed to do OK. We'll find out as time goes on.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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