i'm about 99.8% sure i'm going to do a stroker. what's the deal between the 331/347? pro's/con's of both? going to be a n/a engine, maybe a 125 shot. my gut says go with the 347, same price, more inches. is one a better STREET engine than the other?

 

The 331 is more reliable and will last longer.

 

^ is full of shit.

If the motor is built right, there are no reliability issues with going 347 compared to 331.

Bottom line, if you are gonna stroke it, might as well get the cubes.

There used to be an issue with the ring lands on the pistons for a 347 that caused some oil blow-by... that issue has been resolved with every single new rotating kit: probe/scat etc....

 

Knows what he's talking about.

The oiling issue has been resolved for some time now. There was also the argument that 347's wore down cylinder walls prematurely because of the rod ratio and the 5.3x rod length. Most are now 5.4 or longer depending on the crank.

I loved my 347's driveability. Cam specs and induction are what is really going to determine driveability, not cubes. If you are going to stroke it, get the cubes out of it.

 

347 ... have one --- nice quick revs and lots of torque!

Good data at sbftech dot com

 

i think i'm going to do the 347. since i'm on a budget, i'll build the short block and top it with my p heads, tfs 1, and explorer intake for now, then save for a good set of heads. i'm hopeing it would put down at least 300 to the wheels like that

 

I'm not full of "sh!t". The info I have may be out dated, but it is still legitimate info. You see, an engine will perform until it is broken. The more you use the engine and the harder you push it, the faster it will break. Also, the 331 uses a shorter stroke if I'm not mistaken, when compared to the 347. Why is it that a small block can rev higher than a similarly built big block again? Oh yeah, the rotating mass is less in the small block. It's the same thing with the 331 vs. 347.

Don't gte me wrong, there are MANY 347's out there that see DD duty, and are just fine with it. And did I ever say for him not to get either on of the motors? Nope. I just gave my own opinion. Of course, it's an opinion....and I'm about as qualified (on this subject anyway) to give one as a doctor is qualified to give an opinion on how to build a house. LOL

 

347's suck

 

Try as you may, to explain away bad advice... it's still bad advice.

There is no reason to go 331 if you are having machine work done.... unless you want to be slower than the guy with the 347.

 

Exactly.