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Thread: 347 vs 363

  1. #26
    FEP Super Member xctasy's Avatar
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    Quote Originally Posted by FoxFords&FFR's View Post
    As they say, there is no replacement for displacement.... well you can add some boost to make up for it!!! Or you can have a 363 AND boost to make crazy HP. Price difference is probably negligible unless you were using a stock block in which case you cant get to a 363.

    Mike

    There's no replacement for Iron, Baby.

    FE for ME....


    Cast Iron Charlie Sorenson was right.




    If it aint Iron, it aint Mine!


    I know Mod's are cool,
    and alloy is light,
    but a DART iron small block,
    whats not to like?

    DAS 03-10-2017.

  2. #27

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    Quote Originally Posted by dtmilsap View Post
    What happened 4eyedfoxdriver?

    Sent from my SAMSUNG-SM-G900A using Tapatalk
    That's what happens when you put good 347 parts in a stock block.

    Who's doing your build?
    83 Mustang GT , A5 5 speed, 31 spline Cobra rear, LMR TRX, 302 11r 190 heads, Buddy Rawls custom cam

    86 Capri , 342 stroker , AFR 185 heads, Track Heat intake, 3.73 gears

  3. #28
    FEP Senior Member dtmilsap's Avatar
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    Advance Performance engineering in wichita. The engine builder is John Bolster

    Sent from my SAMSUNG-SM-G900A using Tapatalk

  4. #29
    FEP Super Member xctasy's Avatar
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    Quote Originally Posted by Haystack View Post
    Lets name all the engines with a worse rod to stroke ratio. Most are in heavy duty gas trucks and are known for lasting forever.

    A "race" motor will be abused, beat on and probably over revved alot more then a street motor. Most guys that drag race do end of season refreshes even on a stock 302 bottom end.

    That's it. My beloved Six cylinder Ford engines, 200's, 221's and 250's don't get above 1.505:1. The 68-70 221 has a 1.485:1 rod to stroke ratio (its an I6, not the US SBF 221). They rank as the lowest Rod to stroke ratios. Same as the iamese bore 400 Small block Ch***

    Ford OZ in 1998 spent millions of bucks retooling the old 250 based I6 block's rods and pistons to move from a 1.505 rod ratio to 1.55:1 ratio. That's a hang of a lot of dosh to buy a 0.04 gain.

    They then spend a few million getting the 3.4" crank and 5.35" rods and 1.163" pistons for a 1.573:1 rod ratio. Down from the 302's 1.70:1. LOST 0.127, gained 40 hp and 52 lb-ft, and the crowed when WILD!


    In so doing, they made the first production Ford Stroker 347 (well, a 342 actually, not 30 thou over).Sadly, very late in the piece, 2002. From the last Explorer XLT 5.0 and Mountainer GT 40 P blocks. It never split or had issues becasue they plateau honed, and got some nice SPS Hyper pistons to look after the thinwall castings.


    But Dart uses longer 5.4 rods for a brilliant 1.588:1 ratio with its 3.4" crank stoke. And 1/4" between the bores...solid, Spheriodal Grain Hi Nickel Cast Iron.

    IRON. The stuff Ford loved to take out of every 1969 to 1985 block, Dart put back in, under the assitance of Cactus Jack Roush!

    Can you see the smile on my face?

    Hundereds of engines have sub 1.6:1 rod ratios, and the best of them, 455 Pontiacs, and BBC C***y's, just lap it up.


    I'm a long rod kind guy, but SHP have done there homework on this little jem.


    About time too.

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