306 vs. 331 vs. 347

[custom89stang]

What are the horsepower and torque numbers? Assume everything is stock. The only thing different is displacement.

 

[custom89stang]

Come on, anyone? I know you are out there. estimates?

 

[StreetStang37]

I have a book of dyno runs at home where they put a bunch of stock parts on a 347. ill post it when I get home.

Off the top of my head im guessing around 245-250 hp from the 331 and 260ish for the 347.

 

[Blandnuts]

There are too many variables that come into play to give any "real" estimate. Stock? What do you mean by stock? What's good for one motor isn't good for another. This is comparing apples to oranges. But between a 302 and a 306 there's about 6hp difference...



fred

 

[ashford]

i know a stock 289 will out rpm a 302 and make more torque above 3500

 

[StreetStang37]

ok heres the dyno numbers. Its a bone stock 95 5.0 automatic, then everything was transfered over onto a 347:
...........RWHP...........
RPM......302........347
3700.....168........191
3900.....173........194
4100.....176........200
4300.....174........198
4500.....174........193
4700.....171........188
4800.....168........186
---------------------
...........RWTQ...........
RPM......302........347
3700.....238........271
3900.....233........261
4100.....221........256
4300.....204........242
4500.....191........225
4700.....176........210
4800.....171........204

Hope that helps ya. As for the 331, it'll probably almost look like the 347, just proportionately smaller (about 5% less power all around). Remember, these numbers are from an automatic.

 

[custom89stang]

ok heres the dyno numbers. Its a bone stock 95 5.0 automatic, then everything was transfered over onto a 347:
...........RWHP...........
RPM......302........347
3700.....168........191
3900.....173........194
4100.....176........200
4300.....174........198
4500.....174........193
4700.....171........188
4800.....168........186
---------------------
...........RWTQ...........
RPM......302........347
3700.....238........271
3900.....233........261
4100.....221........256
4300.....204........242
4500.....191........225
4700.....176........210
4800.....171........204

Hope that helps ya. As for the 331, it'll probably almost look like the 347, just proportionately smaller (about 5% less power all around). Remember, these numbers are from an automatic.

Thanks street stang. you rock!

 

[usedtobe 67p51d]

you need more power. howevere glad to see the dyno #'s