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Technical 331 stroker

Discussion in 'The Hokey Ass Message Board' started by willymakeit, Sep 9, 2018.

  1. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,326

    willymakeit
    Member

    Blew my 302 2 weeks ago. Lost pressure and was knocking by time I lgot to shoulder.
    My heads are good (iron) and it is a early roller block if I recall correctly.
    No 347 if I was to go that route I would start with 351.
    Here’s the combo , motor,t18 4 speed with 3.00 gear and 29” rear tire.
    This is a driver which will pull trailer occasionally but nothing heavy total weight 3500.
    Looking for ideas on cam ect. This needs to live on 87 gas.
    I was running Edelbrock 600 and performer manifold, undiluted distrbutor and unknown shorty headers.
    This is all in a 56 F100.
    Thoughts
     
  2. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,248

    gimpyshotrods
    Member

    First, open it up and see how bad it is.
     
  3. If you want to tow, I'd step up to the 351.
     
  4. Mike VV
    Joined: Sep 28, 2010
    Posts: 1,603

    Mike VV
    Member
    from SoCal

    willy wrote -
    I was running Edelbrock 600 and performer manifold, undiluted distrbutor and unknown shorty headers.

    What's an undiluted distributor ?

    Mike
     
    Unkl Ian likes this.
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  5. southcross2631
    Joined: Jan 20, 2013
    Posts: 2,976

    southcross2631
    Member

    I ran my 5.0 on 87 octane. It had Pro Comp aluminum heads , Comp .512 lift hyd. roller cam.
    Edelbrock perfomer intake and Edelbrock carb with a Summit HEI. For 3 years of daily driving. DSCF0955.JPG
    Now days you can buy a 331 kit about as cheap as good rebuild kit. Need to find why it was knocking.
     
  6. Deuces
    Joined: Nov 3, 2009
    Posts: 17,773

    Deuces
    Member
    from Michigan

    Why spend money destroking a 351 Windsor????.... o_O:confused:
     
  7. 1934coupe
    Joined: Feb 22, 2007
    Posts: 3,422

    1934coupe
    Member

    Personally I would also change rear end gears to something like 3.50's no need to let any motor lug.

    Pat
     
  8. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,326

    willymakeit
    Member

    Spell ck unilite
     
  9. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,326

    willymakeit
    Member

    I guess what I didn’t make clear is I’m going to use parts I have for best results with these parts. I won’t tow very much . Most of the time I’m just driving around.
    I have off topic cars/trucks for fast and heavier towing.
    Thinking a 331 would be a little better without a big expense building or maintaining later.
    If someone has experience post a combo you used.
     
  10. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,326

    willymakeit
    Member

    Sounds good.Pretty sure it’s a rod. Instant oil pressure loss. Will start but is hammering.
    If I rebuild will do the stroke.
    Thanks
     
  11. 10 years ago I spent a lot of time researching the 331 versus 347 deal. I found more old wifes tales than truth. I ended up with a scat crank and rods with probe pistons. Mine is a 342. I have around 26000 miles on it. I used the gt40p heads and a stock mustang gt roller with 1.7 rockers. It is 9-1 comp. It is very crisp, has excellent low end and the only down side I can relate is the forged pistons rattle slightly when you 1st start it up. It transformed a typical 302 into something way better.
     
  12. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,326

    willymakeit
    Member

    Thanks good info
     
  13. tjm73
    Joined: Feb 17, 2006
    Posts: 3,310

    tjm73
    Member

    It's almost the same money to build a 331 as rebuild a 302. It is exactly the same money to build a 347 as a 331. The stock 5.0 HO cam is probably what you want to run. It was used in all Mustang LX 5.0's and GT's from '85-'95.

    They are about 210-212 degrees at 0.050 with 0.444" lift with 1.6:1 rockers. Throw a set of 1.72:1 rockers and get 0.477" lift. They make good power from about idle to 5000-5500.

    You can get 300 hp and 350+ ft-lbs pretty easy.
     
    Last edited: Sep 11, 2018
  14. fauj
    Joined: Jun 25, 2009
    Posts: 694

    fauj
    Member
    1. 57-60 Ford F100s

    I ended up putting a Trick Flow Specialties Stage 1 roller in mine with the iron GT-40 heads. Sounds good running, haven't had the chance to drive it yet. I didn't set out to build a monster, just a fun ride. Because of the popularity, there is lots and lots of info on strokers to be found on line. You can even find reasonable dyno info if you wade through the crazies that say they ran in the 10's simply by removing the air filter.:rolleyes:
     
  15. southcross2631
    Joined: Jan 20, 2013
    Posts: 2,976

    southcross2631
    Member

    You can find a take out good used H.O. cam around 25 bucks. I have bought several from Craigslist.
     
  16. 41rodderz
    Joined: Sep 27, 2010
    Posts: 3,239

    41rodderz
    Member
    from Oregon

    I am not sure why throw used parts at reb
    Why throw used parts in an engine that is being rebuilt ? A carb or dizzy maybe but internals doesn't sound like a good idea at all.:eek::oops:o_O
     
    Last edited: Sep 16, 2018
  17. southcross2631
    Joined: Jan 20, 2013
    Posts: 2,976

    southcross2631
    Member

    Used hyd roller cams are no big deal. You can reuse roller lifters on a new roller cam with no issues.
    You need to come out from under that flat tappet and see there is a whole new world out there.
    I buy a lot of used roller cams for street use and racing. My avatar ran 9's for 2 years with a used crane roller cam I bought from a swap meet.
     
    Unkl Ian likes this.
  18. Open it up, might be able to salvage something, might be total scrap.
     
  19. Reusing flat tappet cams is risky, roller cams are no problem.
     
    Deuces likes this.
  20. tjm73
    Joined: Feb 17, 2006
    Posts: 3,310

    tjm73
    Member

    With Ford roller cams you can use new roller lifters with a used cam, used rollers on a new cam or used rollers on the used cam if you know and resuse the used roller on the same lobe it came off. Which is really sketchy unless you take it out yourself and keep it straight. I ran a 2 times used (I was the 3rd owner) cam for over 45,000 miles without issue..
     
    Deuces likes this.
  21. Deuces
    Joined: Nov 3, 2009
    Posts: 17,773

    Deuces
    Member
    from Michigan

    I installed used roller lifters on a new X303 cam in a '95 351 Windsor roller block.... No problems!.... ;)
     

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