More 408 Stroker Build Problems

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    Author Topic: More 408 Stroker Build Problems  (Read 3515 times)

    Offline cutting torch

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    • Posts: 147
    Re: More 408 Stroker Build Problems
    « Reply #15 on: November 10, 2005 - 07:07:24 PM »
    Quote from: Oldschool on November 10, 2005 - 06:58:04 PM
    It is hard to realize the full performance potential when utilizing a 318.  It is not necessarily the cubic inches per se that hurts it. You can stroke it, cam it, exhaust it, induction it and put a set of killer heads on it.  The one problem that is way more difficult to address is that with bigger heads/valves and the smallish bore, the smaller bore tends to shroud the valves. This shrouding disrupts the flow of the mixture entering/exiting the cylinder. This creates a decrease in HP that is not created in a larger cylinder bore engine.  All things being equal, a 340 or 360 gives you "free" HP by not stealing it in the first place.  Just my 2 cents..........Oldschool

    All true. Now we have pro and con. Intended use will dictate the build, I guess.

    torch
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    Offline ACE_5150

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    Re: More 408 Stroker Build Problems
    « Reply #16 on: November 11, 2005 - 08:21:29 AM »
    I'm definitely onboard with OLDSCHool. Esp. on the shrouding effect.

    I just might have to bore the 360 a little more  ( + .060") , so I can say " She's real mean , my 414."

    I think its a great idea to try to get all the cubes you can get out of a small block so you dont have to get the added weight of a BB. If I could stroke a sb to 440cuin, i would do it. My chally definitely doesnt need anymore weight up front, (maybe in the back)
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    "An Adrenal Gland is a Terrible thing to waste!"
    "Bad Cop, No Donut!"

    Offline Plum6Pak

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    • Posts: 3572
    • Plum6Pak
    Re: More 408 Stroker Build Problems
    « Reply #17 on: November 11, 2005 - 08:50:45 AM »
    Quote from: ACE_5150 on November 11, 2005 - 08:21:29 AM
    I'm definitely onboard with OLDSCHool. Esp. on the shrouding effect.

    I just might have to bore the 360 a little more  ( + .060") , so I can say " She's real mean , my 414."


    LOL,

    I saved my pennies and I saved my greens,
    Giddy up Giddy up 414,
    She so much faster than I ever dreamed,
    Giddy up Giddy up 414,
    My 4 speed Challenger Chevy killer 414

    When I take her to the drags she's really mean,
    Giddy up Giddy up 414,
    She's always faster than I ever dreamed,
    Giddy up Giddy up 414,
    My 4 speed Challenger Mustang killer 414

    (Sounds of Mopar at the drags)



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    Oldschool

    • Guest
    Re: More 408 Stroker Build Problems
    « Reply #18 on: November 11, 2005 - 08:57:12 AM »
    Quote from: Plum6Pak on November 11, 2005 - 08:50:45 AM
    LOL,

    I saved my pennies and I saved my greens,
    Giddy up Giddy up 414,
    She so much faster than I ever dreamed,
    Giddy up Giddy up 414,
    My 4 speed Challenger Chevy killer 414

    When I take her to the drags she's really mean,
    Giddy up Giddy up 414,
    She's always faster than I ever dreamed,
    Giddy up Giddy up 414,
    My 4 speed Challenger Mustang killer 414

    (Sounds of Mopar at the drags)




    That's great Plum!  Ever thought about a career in songwriting?  lol  The bad thing is this, I now have your "414" stuck in my head and will replaying it over and over today. I hate it when that happens.
    P.S.--For a great sounding Mopar clip, go here----www.musclecargarage.com/challenger.html       Oldschool
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    Offline matt63

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    • Posts: 1855
    Re: Update on 408
    « Reply #19 on: November 11, 2005 - 06:21:30 PM »
    Quote from: cutting torch on November 10, 2005 - 06:47:47 PM
    I hope they torqued the caps before they measured (I would assume they did). If they are out-of -round, I would contact Eagle to see if you have any recourse. They might make it right.

    torch

    Yeah they torqued the caps.

    Matt
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    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD

    Offline cutting torch

    • Jr. Member
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    • Posts: 147
    Re: More 408 Stroker Build Problems
    « Reply #20 on: November 11, 2005 - 07:37:50 PM »
    I'd call 'em soon! They could tell you to take a flyin' leap, but they may take care of it, too. It's worth a try.

    torch
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    Offline matt63

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    • Posts: 1855
    Re: Another Update on the 408
    « Reply #21 on: November 15, 2005 - 10:23:52 PM »
    I just paid the shop $500 to mill the new piston bosses, resize the big end on the new Eagle rods, check the rod bearing clearances, rebalance and reassemble the rods on the pistons.  I went home and assembled the short block with no problems.  I then measured how much the pistons were protruding from the deck.  I only got one bank done but three were 0.010" proud and one was 0.016".  So much for the zero deck idea.  I'll finish the other bank tomorrow night and then phone the machine shop and ask about milling the high pistons (or not), balance issues ,etc.  I'm going to have to buy Cometic MLS gaskets anyway to get the 0.051" thickness.  What a mess.
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    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD
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