Nodular iron BBF Crank
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Nodular iron BBF Crank

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    Senior Member Amango's Avatar
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    Default Nodular iron BBF Crank

    I bought a after market nodular iron crank on my last build and had it nitrated. ? how much horsepower can she handle. I'm going to put nitrous on her for next summer Big shot system i will start with 200HP Squeeze probably no more. EST. HP around 600 with out the juice.

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    No issue on the crank, if you have a 2 bolt block then it will be the weaker link then the crankshaft.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    Senior Member Amango's Avatar
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    Quote Originally Posted by cstraub View Post
    No issue on the crank, if you have a 2 bolt block then it will be the weaker link then the crankshaft.

    Thanks, I'm running the 2 bolt main caps but with an ARP stud kit installed.

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    Now Paul Kane may say different and if he does then listen to him but over the years I have found that around 700 is the limit of the 2 bolt OEM block for any extended time of HP.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    Senior Member Amango's Avatar
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    Will do, I would probably be around 850 HP with the juice on the lowest setting. if i plane on turning it up some day i will four bolt the block. Or if i can some how convince the wife to let me build a new engine down the road?? This engine was more of an experiment for me, first roller cam engine. Engine probably only has maybe 15 hours on it and runs like a bat out of hell. Always chasing HP.

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    www.highflowdynamics.com LakesOnly's Avatar
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    The OEM 460 crankshafts are nodular iron. I have a personal preference for the OEM cranks over the "cast steel" offshore, 3.85" stroke 460 crankshafts. The one thing the offshore stock stroke 460 cranks have over the factory issue 460 cranks is that the aftermarket offshore cast steel 460 cranks are brand new while the factory issue ones are decades old. All that really means to me is that I must hand-pick my factory crank for the application and get it fully checked out and properly prepped. Thus far, zero crankshaft breakage. I know a guy that runs his cast OEM crank to 9500 rpm and his tach records wheel hop at 10,300. Needless to say a tremendous amount of prep work went into his crankshafts and he is the exception to the rule.

    Offset stroked OEM cranks have been known to support in excess of 1000 hp. Non-stroked OEM cranks to support over 1500, although that is a highly risky and very inadvisable recommendation (if you can afford 1500+ hp, you can certainly afford the proper components for the job). My long-winded point (and answer to your question) is that 850 hp, generally speaking, ain't no thang if you know what you are doing...not excessive for the block and not for the crank. On the other hand, TUNE is what will allow the engine to live and LACK OF TUNE is what will destroy such an engine program in the blink of an eye.

    I would say that in 95% of the build cases 850 hp 2-bolt block cast crank is the limit for the masses in 460 combos.

    Which brings me to N20. I have seen more melted pistons, signs of cap walk, broken rods, windowed blocks, etc, with nitrous oxide than any other power adder, hands down. 2-bolt block and cast crank to 850hp, eh? Well....okay. Getting there with N20? It will be all about your tune.

    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


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    gn7
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    Besides being made from some of the best iron poured, the BBF crank also benefits strength wise from having a 3.00 main and 2.5 rod pin on a 3.85 stroke crank. This gives it one of, if not the largest main/rod pin overlaps in the industry. And the 429 overlap is even larger and stronger. Nodular iron Ford cranks ruled Nascar with 427 HR that had nodular iron cranks and even into the Cleveland days, Ford probably knew, and understood and did more research into nodular iron than either of the other 2



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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by Amango View Post
    I bought a after market nodular iron crank on my last build and had it nitrated. ? how much horsepower can she handle. I'm going to put nitrous on her for next summer Big shot system i will start with 200HP Squeeze probably no more. EST. HP around 600 with out the juice.
    We ran a 4.140" off-set ground stock crank for two years @ 710 hp plus a 200HP shot on top of that.

    They're very strong stock cranks.

    S CP

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    www.highflowdynamics.com LakesOnly's Avatar
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    Quote Originally Posted by gn7 View Post
    ...the BBF crank also benefits strength wise from having a 3.00 main and 2.5 rod pin on a 3.85 stroke crank. This gives it one of, if not the largest main/rod pin overlaps in the industry. And the 429 overlap is even larger and stronger.
    Addendum to the above:

    429 Crank



    460 Crank



    4.14" Offset Stoke (like Sleeper's Crank):


    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


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  12. #10
    Senior Member Amango's Avatar
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    I alway new the ford 460 bottom end was though, i have been building ford's since i was a kid with my Dad. I will spend a lot of time tunning it for N2o and i will be using a Jacobs mastermind controller to bring the nitrous in slow and use plenty of retard in the timing. Thanks for all the info and reinsurance. Next build will defiantly be a 4 bolt block with forged crank. But that engine will be going in my Drag car project that i hope will be done by the year 2020???

  13. #11
    www.highflowdynamics.com LakesOnly's Avatar
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    Quote Originally Posted by LakesOnly View Post
    I would say that in 95% of the build cases 850 hp 2-bolt block cast crank is the limit for the masses in 460 combos.

    LO
    Quote Originally Posted by Amango View Post
    Thanks, I'm running the 2 bolt main caps but with an ARP stud kit installed.
    You may find this hard to believe but I am not as much a fan of the 429/460 ARP mains stud kits as I am the OEM main bolts. I don't care to get into all the details as to why I feel this way, but seeing your combo did give me some afterthoughts:

    2-bolt block, 850 hp, ARP studs, nitrous oxide....you can expect to see signs of cap walking when you tear down your engine sometime later. Do not be alarmed by this. While cap walk is not considered to be part of normal engine operation, it does not automatically equate to a grenaded lower end. It simply equates to cap walk, period, and actually makes sense considering the loads to which the lower end is being subjected. IF you see signs of cap walking, you can consider it to be part of the program and just accept it, although not all combos will exhibit this at 850 hp. We have known 2-bolt 460 blocks to support 1500 hp, cap walking like it's nobody else's business, and live to tell about it. It comes with the territory (particularly in the latter example).

    When you say you bought an aftermarket steel crank, you did not mention the stroke and I assumed 3.85. What is the stroke of your crankshaft?

    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2020 Paul Kane. No copying, linking, printing or otherwise without express written permission.

  14. #12
    Senior Member Amango's Avatar
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    3.85 stroke/forged H-beam rods Keith black 11cc domed pistons, 11.92 compression. Little more info.

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    www.highflowdynamics.com LakesOnly's Avatar
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    Quote Originally Posted by Amango View Post
    3.85 stroke/forged H-beam rods Keith black 11cc domed pistons, 11.92 compression. Little more info.
    If you are using the KB401 hypereutectic pistons, then I would say that they are the weak link in your nitrous program. Of all the hyper piston brands available, the KB's seem to hold up the best in naturally aspirated engines but hyper's in general don't take to nitrous very well.

    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2020 Paul Kane. No copying, linking, printing or otherwise without express written permission.

  16. #14
    Senior Member Amango's Avatar
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    Quote Originally Posted by LakesOnly View Post
    If you are using the KB401 hypereutectic pistons, then I would say that they are the weak link in your nitrous program. Of all the hyper piston brands available, the KB's seem to hold up the best in naturally aspirated engines but hyper's in general don't take to nitrous very well.

    LO
    Yep they are the KB401 pistons. I have ran a 200 shot of nitrous on a 400 cubic inch ford for years with hyper pistons never a problem. I think a lot is set up don't let the system run to dry keep the fuel flowing is the key. Are you talking just about the KB pistons or hyper in general. Thanks for the info.

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