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Cyclone 3.7 fantasy ideas/questions

Discussion in '2011-2014 V6 Mustang Tech' started by Echonan, Oct 30, 2015.

  1. Echonan

    Echonan Active Member

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  2. frankp

    frankp Member

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    Rods are forged powder metal. I replaced them.
     
  3. Echonan

    Echonan Active Member

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    Do you have a build thread or any info anywhere else on this?
     
  4. frankp

    frankp Member

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  5. kylexkilljoy

    kylexkilljoy V6 Mustang Guru

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  6. frankp

    frankp Member

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    Not yet. Car is getting tuned his month. Installed BBK shorty headers, Meth injection. Has a rich tune, but needs a street with and without meth injection, and a race tune. Should be done by December. Then off to the drags.
     
  7. audioAl

    audioAl Coyote Red

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    Lot's happening in turbo and N/A with the 3.7 Cyclone. I just installed DSS 3.5" 1 piece & Bassani axle backs after Koni sports and J&M cc plates.
     
  8. falconguy

    falconguy Member

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    I put a N/A 3.7L into my Ford falcon. You will need the ECU, Smart Junction Box and electronic throttle. The fuel system is returnless so some thought there. I just put an intank fuel pump and one way valve and it works well. My nearly stock engine is putting out about 327 hp at +4,000 ft. elevation
     

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  9. wireflight

    wireflight New Member

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    The Super Six Motorsports "4.0 Stroker kit" isn't necessarily a 4.0: the stroker crank is listed as 3.60" (which converts to exactly 91.44mm); the pistons they have available are listed in SAE +0.004 and SAE +0.020 bore sizes. The stock bore for the 3.5 is 92.50mm (very slightly less than 3.642"), so figure 3.646 is the smaller overbore and 3.662 is the larger overbore. The stock bore for the 3.7 is 95.50mm (very slightly less than 3.760"), so figure 3.764 is the smaller overbore and 3.780 is the larger overbore.

    Here's what that looks like:

    3.5 block, stock bore, 91.44mm stroke = 3,686.90 cc (224.99 cubic inches)
    3.7 block, stock bore, 91.44mm stroke = 3,929.92 cc (239.82 cubic inches)

    3.5 block, 3.646" bore, 91.44mm stroke = 3,695.54 cc (225.52 cubic inches)
    3.7 block, 3.764" bore, 91.44mm stroke = 3,938.62 cc (240.35 cubic inches)

    3.5 block, 3.662" bore, 91.44mm stroke = 3,728.05 cc (227.50 cubic inches)
    3.7 block, 3.780" bore, 91.44mm stroke = 3,972.18 cc (242.40 cubic inches)

    So, you really only get to a displacement that properly rounds up to a 4.0 if you go with the maximum overbore in the 3.7 block, and add the stroker crank to that. I understand that it's really sort of a marketing decision for SSM, but imagine the guy who buys a "593 cubic inch" stroker kit for his 460, only to discover that means taking the bore all the way out to 4.580". Sure, there are a handful of blocks that could take that, after the lower portion was filled with block rock. Or, maybe it's advertised as a 567: all you need for that is an early casting (pre-'72, not core-shifted), bored out as far as you can take it without filling the block. With the stock bore, the 4.5-inch crank gets you to 537 cubes.

    To me, it seems more honest to advertise it as a 537+ cubic-inch (or as an 8.8+ liter) stroker: pick a bigger bore, and get more cubes! With the SSM kit, you have to subtract displacement down to the one that corresponds to the bore that you're using. It's all the same in the end; frankly, it would be a LOT simpler if stroker kits were listed by stroke; and then by connecting rod center-to-center length; and then by compression height, then by crown thickness, piston pin dimensions and ring stack. It sounds like a lot of info -- and in a sense, it is -- but I wouldn't buy a kit without knowing those things.

    If you're going to a 3.78 bore, make sure the shop that does your block does NASA-quality work.