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View Full Version : 347 vs 302???

94svtcobra
02-26-2010, 10:54 PM
how many hp and tq roughly would i pick up switching from a 302 to a high compression 347 setup?
Balaska347
02-26-2010, 11:24 PM
about 50
Rodeheavers
02-26-2010, 11:30 PM
a whole bunch of tq...
Balaska347
02-26-2010, 11:32 PM
oh yeah gotta love the torque. thats the best part
scott5
02-27-2010, 06:20 AM
alot
Killercanary
03-09-2010, 12:12 AM
I made 304rwhp/331rwtq with my stock shortblock 302. I then built a 8.9:1 compression 331 and used all of the same parts on it except for a holley intake and a larger fox style TB and I put down 380rwhp/380rwtq. This is with the same heads and cam. I haven't had it properly dyno'd since I swapped out the heads, rockers, and exhaust.
Rodeheavers
03-09-2010, 12:39 AM
I made 304rwhp/331rwtq with my stock shortblock 302. I then built a 8.9:1 compression 331 and used all of the same parts on it except for a holley intake and a larger fox style TB and I put down 380rwhp/380rwtq. This is with the same heads and cam. I haven't had it properly dyno'd since I swapped out the heads, rockers, and exhaust.

good info , keep it coming.
scott5
03-09-2010, 07:53 PM
I made 304rwhp/331rwtq with my stock shortblock 302. I then built a 8.9:1 compression 331 and used all of the same parts on it except for a holley intake and a larger fox style TB and I put down 380rwhp/380rwtq. This is with the same heads and cam. I haven't had it properly dyno'd since I swapped out the heads, rockers, and exhaust.

you dont know what your talking about:lol:, just kidding bud:becky: