Need A Little Help Planning My Engine Build From Someone Knowledgeable Please!!

Discussion in '1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-' started by DemonHorse89, Jan 29, 2014.


  1. rbohm

    rbohm Founding Member

    Joined:
    Apr 13, 2002
    Messages:
    5,921
    Likes Received:
    177
    Trophy Points:
    104
    Location:
    tucson,az
  2. A5literMan

    A5literMan Advanced Member

    Joined:
    Jul 31, 2011
    Messages:
    1,000
    Likes Received:
    211
    Trophy Points:
    74
    Location:
    Illinois
    Boss block is def an upgrade and a good selection. I prefer Dart Machinery myself but either will work. I've heard of a few issues on the boss blocks.
  3. revhead347

    revhead347 I have face herpes.

    Joined:
    Jun 14, 2004
    Messages:
    6,125
    Likes Received:
    148
    Trophy Points:
    104
    Location:
    Acworth, GA
    Be careful with the Boss Block. They are good, but don't get lured in with the price. In most circumstances you are better off with a Dart Block. The Boss block has shorter cylinder bores so that you can fit a 3.5" stroke crank in there more easily. A 347 is a 3.4" stroke crank. With the shorter cylinder bores you have to use a special piston to keep the oil control ring from popping out the bottom. If you call FRPP they will tell you exactly what to buy, and they are significantly more expensive than a standard 3.4" stroke piston. There haven't been too many people that have set up a 3.4" stroke Boss block, so the pistons aren't as tested as the old style ones for the standard bore length. It's actually a huge controversy, where by people have been blaming Ford for making an inferior block. IMHO, skip the controversy and go to the tried and true Dart block.

    Kurt
    A5literMan likes this.
  4. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

    Joined:
    Nov 30, 1999
    Messages:
    6,096
    Likes Received:
    705
    Trophy Points:
    164
    Location:
    Somewhere on a hill in the PA wildnerness
    Dart all the way!
  5. rbohm

    rbohm Founding Member

    Joined:
    Apr 13, 2002
    Messages:
    5,921
    Likes Received:
    177
    Trophy Points:
    104
    Location:
    tucson,az
    if one is going to spend the extra few hundred for a dart block, then get this one;

    http://www.dssracing.com/product_p/dartshp.htm

    and spec the 4.125" bore and build a 363ci windsor. if you are going to be a bear, be a grizzly bear!!
  6. A5literMan

    A5literMan Advanced Member

    Joined:
    Jul 31, 2011
    Messages:
    1,000
    Likes Received:
    211
    Trophy Points:
    74
    Location:
    Illinois
    Well if you're going to be a Grizzly buy a Dart Man-O-War block. Lol. The SHP block would be more than enough.
  7. revhead347

    revhead347 I have face herpes.

    Joined:
    Jun 14, 2004
    Messages:
    6,125
    Likes Received:
    148
    Trophy Points:
    104
    Location:
    Acworth, GA
    I can't back any of this up with personal experience, but I recently saw advice from Woody at Ford Strokers to pass on the Man O'War. He said he was having quality control problems with those blocks. He is now doing his strokers with the Dart block.

    Kurt
  8. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

    Joined:
    Nov 30, 1999
    Messages:
    6,096
    Likes Received:
    705
    Trophy Points:
    164
    Location:
    Somewhere on a hill in the PA wildnerness
  9. revhead347

    revhead347 I have face herpes.

    Joined:
    Jun 14, 2004
    Messages:
    6,125
    Likes Received:
    148
    Trophy Points:
    104
    Location:
    Acworth, GA
    If you hunt around on the corral classifieds, you can usually find a decent price on a used, or purchased but never used R302 block. Those are good as well. Pass on the A4 block though because it has a 2 piece rear main seal.

    Kurt
  10. A5literMan

    A5literMan Advanced Member

    Joined:
    Jul 31, 2011
    Messages:
    1,000
    Likes Received:
    211
    Trophy Points:
    74
    Location:
    Illinois
    I read that also and am going to use Woody's expertise very soon myself!:nice:
  11. curleyslx

    curleyslx New Member

    Joined:
    Nov 5, 2010
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    2
    Location:
    bayville, nj
    Hey guys, i'm not trying to hijack the thread but i'm looking to do roughly the same thing, build a stroker motor, first time, similar hp goals just no forced induction, my question is is there a difference in block machining between the 331 and 347? scat kits are the same price on AM and summit i'm just wondering will one cost me more due to machining needed? i'm looking for no more than 350-400hp as its only a daily and i want it to be reliable, yes i understand higher hp can be made and made reliably but i don't need the higher hp or the cost that goes with it. thanks for any help
  12. A5literMan

    A5literMan Advanced Member

    Joined:
    Jul 31, 2011
    Messages:
    1,000
    Likes Received:
    211
    Trophy Points:
    74
    Location:
    Illinois
    No difference in machine work. There is some debate on durability on the 347 vs 331. Some say the 347 has less due to more side loading on the piston because of the rod stroke combo. But it's debatable. There is no cost differences.
    curleyslx likes this.
  13. curleyslx

    curleyslx New Member

    Joined:
    Nov 5, 2010
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    2
    Location:
    bayville, nj
    thank you sir i appreciate the quick response
  14. revhead347

    revhead347 I have face herpes.

    Joined:
    Jun 14, 2004
    Messages:
    6,125
    Likes Received:
    148
    Trophy Points:
    104
    Location:
    Acworth, GA
    I think they only real advantage of the 331 is that it is easier to keep the compression down for forced induction. Even with dish pistons a 347 ends up being around 10:1 unless you can get some really big combustion chamber heads.

    Kurt
  15. Pops Fun

    Pops Fun Active Member

    Joined:
    Feb 16, 2003
    Messages:
    950
    Likes Received:
    10
    Trophy Points:
    29
    Location:
    Cincinnati, Ohio
    Hi
    My 347 is 8.5 to 1 ....

Share This Page