Motor build

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

  1. 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.
  2. 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.
  3. 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.