331 vs. 347

[BlackSVTCobra94]

i am planning to rebuild my motor but dont know what to do i cant decide between a 331 stroker or 347 stroker

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[redpony88]

please use the search tool.... this one comes up COUNTLESS times. most everyone will say to go 347. now, i will too cause i've been made aware of what the pros are now. there are a few guys on here but i would say joel helped me understand the 347's i'll build one later down the road

[67mustang302]

What's it for? 347 is great for drag racing and street use. If it were for a blower car on the street, especially positive displacement then a 331 or even maybe staying 302 might help for controlling low rpm torque. It depends on what you want. N/A though I'd build a 347. Or get a 4.125 bore aftermarket block and build a 363.

[OnyxCobra]

split the difference and do a 342 lol

[Bubba 95SN]

Here comes the math...Number of cylinders x .07854 x Bore x Bore x Stroke = CID Comes out to 331.6456 over half so is 332! My machinist did this to me when I told him wanted to build 331. Guess 331 sounds better, go bigger go 332. Checked it out and the math is correct numbers do not lie.

[mjr46]

347 for more cubes, the only reason to constrain yourself to less cid is class racing, for the hobbiest, go for larger