455 olds ????
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455 olds ????

  1. #1
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    Question 455 olds ????

    Ive got a 455 with block FA and F5 I want a relieable 450hp motor tell me how to do it cheap heads are J double springs
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    Boat Nut sleekcrafter's Avatar
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    Not that an Olds won't do it, it's the longevitiy that suffers upping the HP in the OLDS, they will last for ever in stock form. Seriously a Ford or Chevy would be much more reliable @ 450hp...
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    Default olds

    check out realoldspower.com, but I think sleek is right. Just as a reference larger bore= hp longer stroke=torque (oversimplified), and the olds 455 is really just a small block with a taller deck and longer stroke.
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    NW Spectraholic Malcolm's Avatar
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    I think you could do 400 with that setup but not 450. The J heads are not known for their great flow. You say cheap, how cheap you talkin'?
    Malcolm

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    Senior Member EVILFORCE's Avatar
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    Best cheap way is to buy a 460 Ford or a 454 Chevy. Sorry.
    No Fool Like A Old Fool is there?

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    Quote Originally Posted by sleekcrafter View Post
    Not that an Olds won't do it, it's the longevitiy that suffers upping the HP in the OLDS, they will last for ever in stock form. Seriously a Ford or Chevy would be much more reliable @ 450hp...
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    I will possibly get a set of wa heads soon that will help

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    I'll second the trip to realoldspower.com...all the info you need is there.

    I'm in the same boat(terrible pun I know....)....currently have a 455 that is toast, and instead of swapping out to a ford or chevy(even thought about pulling the v10 outta my dodge....."pipe" dream I know...lol). But for simplicity, I am just going back to the 455. I picked up a couple "running" junkyard motors, one to drop in and get wet, the other to build with all the tricks needed to keep the 455 together for extended WOT fun.

    In my *very* limited experience I would worry more about torque than hp....and keep the rpms under 5000 if you want "reliable".

    What are "wa" heads?

  11. #9
    "Mad" Member Jet Mad's Avatar
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    There is no way to get that HP range cheap. I have done a lot of reshearch regarding the 455 Olds and to build a reliable one takes a good engine builder that knows the machine and all the tricks.

    1. Restricted Pushrods.
    2. Resrtict oil galley on mains to cam.
    3. Restricted cam bearings.
    4. Nodular crank.
    5. Enlarge backflow oil galleys in heads.
    6. Debur lifter valley.
    7. Modify conrods.
    8. H/V oil pump.

    and the list goes on.

    Oh, and you can listen to Malcolm - I using the advice he gave me on rebuilding my engine.

    Most important is the tolerances on the big end and main bearings.

    Been there done that

    PS. And I am a big Olds fan. Don't do it cheap do it right the first time.
    Last edited by Jet Mad; 02-02-2010 at 02:17 AM.

  12. #10
    "Mad" Member Jet Mad's Avatar
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    Quote Originally Posted by camusmuse View Post
    I'll second the trip to realoldspower.com...all the info you need is there.

    I'm in the same boat(terrible pun I know....)....currently have a 455 that is toast, and instead of swapping out to a ford or chevy(even thought about pulling the v10 outta my dodge....."pipe" dream I know...lol). But for simplicity, I am just going back to the 455. I picked up a couple "running" junkyard motors, one to drop in and get wet, the other to build with all the tricks needed to keep the 455 together for extended WOT fun.

    In my *very* limited experience I would worry more about torque than hp....and keep the rpms under 5000 if you want "reliable".

    What are "wa" heads?
    "Wa" heads are a Irragation/Marine prepared heads - You get Ka an Ga heads as well. hardended seats, big valves etc.

    If the engine number is as follows 5L 345253 it means the engine was designated for Marine or Irragation pump use.

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    The most important thing is to NOT listen to the chubby and ferd guys.
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  14. #12
    NW Spectraholic Malcolm's Avatar
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    Hmm, never heard of Wa heads.... I'm running the Ka's tho...
    Malcolm

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  15. #13
    "Mad" Member Jet Mad's Avatar
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    Quote Originally Posted by Malcolm View Post
    Hmm, never heard of Wa heads.... I'm running the Ka's tho...
    Yip, I had a look at the Olds site, no Wa heads

  16. #14
    "Mad" Member Jet Mad's Avatar
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    Honda1

    Can you give me the Casting nr on your heads?

    Will give you the specs on them.

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