View Poll Results: 331 or 347
331
9
27.27%
347
24
72.73%
Voters: 33. You may not vote on this poll
331 or 347
5th Gear Member
Joined: Nov 2008
Posts: 2,401
From: SC
More cubes build torque but at the cost of rpm. The heavier the rotating assembly and longer stroke the slower the engine has to turn or it will tear the block apart. On a Turbo engine the the boost makes torque by superior cylinder filling so you can spin them up faster so by using a shorter stroke and not as much throw on the crank you can get another 500 rpm out of it. You can boost either or run either NA. I just prefer shorter stroke engines under boost. It's just rotating weight that makes the differance for me. In my 540's I never have to spin them over 6000rpm.
2nd Gear Member
Joined: Feb 2006
Posts: 271
From: Florida!
More cubes build torque but at the cost of rpm. The heavier the rotating assembly and longer stroke the slower the engine has to turn or it will tear the block apart. On a Turbo engine the the boost makes torque by superior cylinder filling so you can spin them up faster so by using a shorter stroke and not as much throw on the crank you can get another 500 rpm out of it. You can boost either or run either NA. I just prefer shorter stroke engines under boost. It's just rotating weight that makes the differance for me. In my 540's I never have to spin them over 6000rpm.
5th Gear Member
Joined: Nov 2008
Posts: 2,401
From: SC
Never said it couldn't be done. Lots of guys running twin turbo 347's on a stock block. Not ideal. A 360 cubic inch engine would be an aftermarket block.
3rd Gear Member
Joined: Feb 2008
Posts: 836
From: Florida
What the hell is "more square" suppose to mean? Please enlighten me...........(all sarcasm intended)
I have read some your past posts, you do not have a clue and should not be commenting on the differences between a 331 and 347. Case in point this reply to a thread you started asking about Professional Products 70mm throttle bodies...........
I know but I'm so in love with the look,and frankley cant really stand the look of most other's. Plus my goal isnt the fastest car on the street, I'll evaluate my set up after some run's this summer.
Thank you all for your input, PP TB sounds like a winner to me I'll take my chance's with it.
Any recomendation on MAS size and brand. I was thinkin P&L 73 or 76 as far as cam goes my original intention's were just an aphabet cam.
Thank you all for your input, PP TB sounds like a winner to me I'll take my chance's with it.
Any recomendation on MAS size and brand. I was thinkin P&L 73 or 76 as far as cam goes my original intention's were just an aphabet cam.
Last edited by PJC Racing; Mar 25, 2009 at 05:50 PM.
5th Gear Member
Joined: Nov 2008
Posts: 2,401
From: SC
3rd Gear Member
Joined: Feb 2008
Posts: 836
From: Florida
Ok, and the point is........... I guess Ford, Dart, and World are screwed up with blocks that can be bored to 4.125" or even a stock 302. What's the relation? Why would we want them even?