Motor build

Discussion in 'Fox 5.0 Mustang Tech' started by RickLX, Dec 6, 2003.


  1. RickLX

    RickLX New Member

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    im trying to decide how many c.i's would be good for my build. im kind of doing this backwards but i bought all this stuff for my 302 and now i need a new block, so i dont know if i should go with a 306, 331, or a 347. i have performer heads, 1.90 1.60's, performer rpm manifold, 30 lbs injectors, f303 cam, 1.6 rr,1 5/8 headers, bassini off road x pipe, and flowmaster 2 chamber cat back, adjustible fuel pressure regulator. its got good top end but the torque sucked with a 302 so i was thinking a 347, but im not sure how rev happy the 347 is and if it could take 6500rpms. its a "daily driver" but i race it also. i know that a 306 is supposed to be bullit proof, so im concidering that, and the 331 is kind of in between. i dont want any bigger than a 347 though. thanks for the input.
    Rick
  2. blk306

    blk306 New Member

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    Those Eddy 1.90s have go flow rates. With what you have, I'd go 331. You could also do a 306. I have a s/c 306 with those heads but I still wonder what it'd be like if I would done a 331.


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  3. ponyboy19

    ponyboy19 Founding Member

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    I'd do a nice 331 for the street.. it has a better rod ratio and will likely live a longer happier life with everyday driving on the street.

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