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454 to 518 ?

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    Senior Member creepingcharlie's Avatar
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    Default 454 to 518 ?

    Here's one for the engine guys. Is it possible to get 518ci out of a passenger 454 BBC. I believe it would take a .030 over piston and a 4.50 in stroker crank. I don't know if it would us the stock 6.135 rods. this is just what i have seen on some site. I also would like to know is it worth it to have that big of a stroke to achieve that cubic inch. Pros and con on the combo. Thanks for any info.

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    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by creepingcharlie View Post
    Here's one for the engine guys. Is it possible to get 518ci out of a passenger 454 BBC. I believe it would take a .030 over piston and a 4.50 in stroker crank. I don't know if it would us the stock 6.135 rods. this is just what i have seen on some site. I also would like to know is it worth it to have that big of a stroke to achieve that cubic inch. Pros and con on the combo. Thanks for any info.
    4.350 x 4.25 is 505 cid,, 4.370 x 4.25 is 510 cid,,
    or is your question will a 4.5 stroke fit is a normal bbc..???
    is there some reason that you need exactally 518 cid ,,,???...Eric

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    Senior Member Boat 405's Avatar
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    Quote Originally Posted by creepingcharlie View Post
    Here's one for the engine guys. Is it possible to get 518ci out of a passenger 454 BBC. I believe it would take a .030 over piston and a 4.50 in stroker crank. I don't know if it would us the stock 6.135 rods. this is just what i have seen on some site. I also would like to know is it worth it to have that big of a stroke to achieve that cubic inch. Pros and con on the combo. Thanks for any info.
    Just depends on what you are planning to do with it. Not a lot of people start with a 4.280 bore and a 4.5 stroke. RPM range? Jet boat/ Vdrive? Cruiser/Race boat.
    Boat 405.

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    4.250 +.030=4.280x4.500=518ci...u would prob need 6.385 rods, not sure ...just my .02 cents

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    I think getting a 4.5" stroke in a passenger car block would be your biggest hurdle. I don't think a 6.135 rod would be long enough to clear the stroke. Any reason for the combo? SJ

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    just a ski boat with bark Carnivalride's Avatar
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    Quote Originally Posted by creepingcharlie View Post
    Here's one for the engine guys. Is it possible to get 518ci out of a passenger 454 BBC. I believe it would take a .030 over piston and a 4.50 in stroker crank. I don't know if it would us the stock 6.135 rods. this is just what i have seen on some site. I also would like to know is it worth it to have that big of a stroke to achieve that cubic inch. Pros and con on the combo. Thanks for any info.
    The stroke is the biggest issue I see in a production block. 4.25 is pretty common and I know a of a couple of 4.375 stroke 9.8 deck height blocks but I haven't heard of ever getting the 4.5 stroke in a production block (not saying it can't be done but as stated before it'll be the hurdle).

    4.375 stroke cid are as follows:
    +.030 4.280 504
    +.060 4.310 511
    +.100 4.350 520
    +.125 4.375 526

    And I believe JE makes a few pistons for the 4.375 stroke with 6.385 rods for the 9.8 deck height.

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    Quote Originally Posted by super junk View Post
    I think getting a 4.5" stroke in a passenger car block would be your biggest hurdle. I don't think a 6.135 rod would be long enough to clear the stroke. Any reason for the combo? SJ
    x2 i have never seen anything over 4.375 crank in a production block and that was a lot of work, $$

    buy a used bowtie tall deck you will be money ahead with alot more power,

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    Distinguished Member David 519's Avatar
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    Quote Originally Posted by havasubyou View Post
    x2 i have never seen anything over 4.375 crank in a production block and that was a lot of work, $$

    buy a used bowtie tall deck you will be money ahead with alot more power,
    +1, except I've run both and prefer Dart blocks to Bowtie.
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

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    Senior Member Retired Flatbottom Racer's Avatar
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    Quote Originally Posted by David 519 View Post
    +1, except I've run both and prefer Dart blocks to Bowtie.
    David, Have you ever weighed a Dart block? How does it compare with the bowtie, weight wise? Just wondering.

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    Senior Member bp298's Avatar
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    Quote Originally Posted by David 519 View Post
    +1, except I've run both and prefer blowing up Dart blocks to Bowtie.
    fixed it for ya

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    Distinguished Member David 519's Avatar
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    Quote Originally Posted by Retired Flatbottom Racer View Post
    David, Have you ever weighed a Dart block? How does it compare with the bowtie, weight wise? Just wondering.
    No I haven't weighed them but I've heard Dart's are heavier. I think Joey Grose and Chris (CS19) (I'm sure a whole bunch of others) have been able to lighten them a bunch. I don't remember exactly how much they pulled out of them, but I was surprised on how much. Maybe they'll chime in with numbers or search the JB forum for Chris' thread on this...


    Quote Originally Posted by bp298 View Post
    fixed it for ya
    Thanks ya friggen prunepicker
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

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    I here tails of 40 lb's between the two.

    I bought a used bowtie t/d on ebay for 500.00 already clearanced for 4.500 stroke and 4.600 bore it has about three years of easy run time in my ski flat.

    my only point was not to try and build a eggshell out of a production block when you can buy a used race block for less and have more power and a good block to boot,

    ps. there would be a lot of piston hanging out the bottom of the cyl bores on a production short deck block with 4.5 stroke.
    Last edited by havasubyou; 01-11-2010 at 01:12 PM. Reason: ps.

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    gn7
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    Any body notice that the original poster bailed right after his post. Must have figured out that the combo was a no go!



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  16. #14
    Distinguished Member David 519's Avatar
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    Quote Originally Posted by gn7 View Post
    Any body notice that the original poster bailed right after his post. Must have figured out that the combo was a no go!
    Yea, but I'm still here
    Nothing wrong with a bowtie at all. If I ran across a 'bro deal on one, I'd run it it a "Heartbeat". For a short deck, I like a 4" stroke 4.600 bore combo. You have room for a decent rod/stroke ratio without having to shove the wrist pin way up into the ring pack. It's what I intended to build this go around until I ran across a 4.25" Crower crank.....
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

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