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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » 331

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    2/29/2020 6:48 PM  #1

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    331

    Turned over the 331 to the owner today.  Had a few issues with spark plug to header clearance. Ended up with acell short plugs and 135 degree wires.  Also used the torch to clearance the the headers and added insulation sleeves. Was very pleased with the test drive . I  think the cam choice was good. It was a flat tappet cam . Even taking it easy broke the tires lose with ease.

     

    2/29/2020 7:02 PM  #2

    Bullet Bob
    Senior 24-7 FYI Addict

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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,888

    Re: 331

    Oh youse guys.... Getting me all worked up about a 331.  Thinking I may  build one with my brand new 5.0 block and install it along with the 4R70W that's setting on the shop floor.

    What cam and heads did you use on that build, Steve?

    BB

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    2/29/2020 7:12 PM  #3

    HudginJ3
    Senior 24-7 FYI Addict

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    From: Cedar Hill, TX
    Registered: 4/29/2015
    Posts: 1,249

    Re: 331

    Steve-G wrote:

    Turned over the 331 to the owner today.  Had a few issues with spark plug to header clearance. Ended up with acell short plugs and 135 degree wires.  Also used the torch to clearance the the headers and added insulation sleeves. Was very pleased with the test drive . I  think the cam choice was good. It was a flat tappet cam . Even taking it easy broke the tires lose with ease.

     

    70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
     

    2/29/2020 8:09 PM  #4

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,867

    Re: 331

    331..............suppose to be the 'magic-size'!!    Tell us the detailz!!!  Bet it's got a nasty/snotty camshaft
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/01/2020 6:29 AM  #5

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,514

    Re: 331

    My goal's to have mine running in my '89 GT this year.  I built mine on a 5.0 block with a DSS kit (10.5:1 compression).  AFR 185 Renegade heads, Crane 449631 cam (112 degree LSA, 0.542/0.563 lift, 220/228 lift @ 0.050"), Edelbrock Performer RPM intake, JBA shorties, 30lb/hr injectors, Accufab 70mm TB, and Pro M 80mm MAF.  Should be in the 425-450HP range NA and can take as much nitrous as the stock block can without splitting if I want to spray it. 

    Now I need to step on Astro Performance's neck to get the kit for my T5.  Only been waiting a year...

     

    3/01/2020 6:22 PM  #6

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: 331

    Looked around for a 5.0 roller block,  even ask on this forum.  Couldn't find one in the budget at the time.  So went with the original 302. Bored .030 over along with all th

       •Thread Starter
     

    3/01/2020 6:25 PM  #7

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: 331

    All the machine work. And a scat kit. World products heads and a complete comp cams valve train.  Xe 268 flat tappet cam.

       •Thread Starter
     

    3/01/2020 7:27 PM  #8

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,867

    Re: 331

    Sounds like plenty of....."get-side-wise-at-will" stuff!
    6s6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/02/2020 5:00 PM  #9

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,514

    Re: 331

    Don't forget the ZDDP at every oil change or it will really be a flat tappet cam.  Also, I really like the Joe Gibbs break in oil I've been using.  I think its worth it to get dedicated break in oil, especially with the concerns a flat tappet cam poses. 

     

    3/03/2020 7:56 PM  #10

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: 331

    All comp cam valve train.  Used comp cam break in oil.  They recommend a 30 minute break in run then change the oil to their high zinc oil. I have never done this before,  but with the cost of parts I did it.

       •Thread Starter
     

     

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