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420nitro · 07-02-2004, 09:35 PM

If you do it right.....the 347 is FINE....PERIOD.

The only thing that would bother me is, that any stroker for a 302 base motor which ends up with more then 331 cubes would be on the edge of splitting the stock block in half with any decent amount of load. I would keep the spray under 125 and boost under 8 pounds. Other then that...it's just a ticking time bomb. If you plan on any more then the amount listed before,....then an aftermarket block is in order along with upgraded riciprocating parts. Then that's when shit starts to snow ball on ya, when it comes to $$$ on your orignal thought simple project.

The only difference between the 331 and 347 besides the cubes is the 331 allows a slightly longer rod with-out passing the oil ring land. So this brings in a long history of debate about rod-ratio. The better the ratio the longer the piston will stay at top dead center as well as bottom dead center. And this can keep going on and on. We'll just end it here.

Moral of the story is: PLAN YOUR PROJECT AND STICK TO IT!!! Get what you want and do it right! Cut corners and it will bite you back 100 fold!

07-02-2004, 09:35 PM	#7
420nitro Registered Member Join Date: Nov 2003 Location: Rockford Posts: 596	If you do it right.....the 347 is FINE....PERIOD. The only thing that would bother me is, that any stroker for a 302 base motor which ends up with more then 331 cubes would be on the edge of splitting the stock block in half with any decent amount of load. I would keep the spray under 125 and boost under 8 pounds. Other then that...it's just a ticking time bomb. If you plan on any more then the amount listed before,....then an aftermarket block is in order along with upgraded riciprocating parts. Then that's when shit starts to snow ball on ya, when it comes to $$$ on your orignal thought simple project. The only difference between the 331 and 347 besides the cubes is the 331 allows a slightly longer rod with-out passing the oil ring land. So this brings in a long history of debate about rod-ratio. The better the ratio the longer the piston will stay at top dead center as well as bottom dead center. And this can keep going on and on. We'll just end it here. Moral of the story is: PLAN YOUR PROJECT AND STICK TO IT!!! Get what you want and do it right! Cut corners and it will bite you back 100 fold!