[RLG34750]

Originally Posted by wetback

I'd go with a 331 stroker if you want to boost/spray it later. 347s get really stressed out with boost, specially if its a stock block. I'd get a 347 stroker if it was a Man O' war block or something. I'm going with turbo, so I'm stroking my block to a 331, the block is weak as it is, I want to keep as much meat on the walls as possible until I can afford the $4K block tag. But then again its your car

Oh it has rasied its ugly head again......

Button line is a stock block will not much more than 500hp safely....

the displacement has very little to do with.......

so a 331 or 347 stock block......

will most likely fail no matter what the power adder.....

BTW what block are you buying for 4K .......

[EagleAutosports]

Either will work fine, and make comparable power. Jeez, you guys act like putting in a 331 is like putting in a Chevy engine.

[RLG34750]

Originally Posted by EagleAutosports

Jeez, you guys act like putting in a 331 is like putting in a Chevy engine.

There is nothing wrong with a 331......

When built right they can make good power......

My problem is all the wrong information given with regard to 347's.....

And I repeat.......

There Is No Replacement For Displacement.......

[wetback]

Buy a Eagle KIt all forged, H-beam rods, SPM for pricing I work for a major parts company. It'll give you enough compression to be able to boost it later.

[wetback]

I'm getting a Man O' war block from World. Stroke it out, boost it, with a TrickFlow top end kit. Whenever I can afford the block or brake the stock one. Either way its going to be a daily driver.

[EagleAutosports]

Ah, ok... all the old 347 problems. All of them WERE true, but the newer kits have addressed all of the problems they used to have. It's hard to shake old information.

[wetback]

The problem is always going to be there, thinner cylinder walls, max stroke, lot more heat that you don't need on the street. Its stress on the block that you dont need to have a fast street car. Reggie is right, the block is still going to blow at or about 500hp, but why put unecessary strees on it?

[RLG34750]

Originally Posted by wetback

The problem is always going to be there, thinner cylinder walls, max stroke, lot more heat that you don't need on the street. Its stress on the block that you dont need to have a fast street car. Reggie is right, the block is still going to blow at or about 500hp, but why put unecessary strees on it?

How will you have thinner cylinder walls.....

When a 331 & 347 traditionally both have a .030 overbore......

[89coupe]

The rod to stroke ratio is minute between the 331 and 347. And like Reg said, .030 is .030. No way around that

347 RtS ratio is 1.588 Given its a 5.4 rod and 3.4 stroke crank. A 5.4 rod doesnt have to be used. You can also use a 331 rod. So there is no reason not to go the extra cubes
331 RtS ratio is 1.635

Not much to worry about.

[EagleAutosports]

There's SOOO many combinations...

302 block 302 crank:
3.075 stroke
Most common rod length - 5.205
Most common rod ratio - 1.69:1
314 CID (.030)
315 CID (.040)
318 CID (.060)

Usually uses turbo 4 cylinder rods. Try to limit use to naturally aspirated combos under 400 hp.

302 block 302 crank:
3.125 stroke
Most common rod length - 5.400
Most common rod ratio - 1.73:1
319 CID (.030)
320 CID (.040)
324 CID (.060)

302 block 302 crank:
3.240 stroke
Most common rod length - 5.200
Most common rod ratio - 1.60:1
331 CID (.030)
332 CID (.040)
336 CID (.060)

Most use 1.9L 4 cylinder rods. Try to limit use to naturally aspirated combos under 400 hp. When high quality 5.4 rods are used, the ratio goes up to 1.66:1 and is more durable.

302 block 351 crank (Windsor or Cleveland):
3.300 stroke
Most common rod length - 5.400
Most common rod ratio - 1.64:1
337 CID (.030)
338 CID (.040)
342 CID (.060)

Use of Cleveland crank gives excellent strength at a good cost. The 3.300 stroke gives the best rod ratio of all 302 block/351 crank combinations and allows maximum flexibility for piston types and ring positions.

302 block 351 crank (Windsor or Cleveland):
3.350 stroke
Most common rod length - 5.400
Most common rod ratio - 1.61:1
342 CID (.030)
344 CID (.040)
347 CID (.060)

302 block 351 crank (Windsor or Cleveland):
3.400 stroke
Most common rod length - 5.400
Most common rod ratio - 1.59:1
347 CID (.030)
349 CID (.040)
352 CID (.060)

The 352 CID is recommended for aftermarket blocks due to the .060 bore size.

302 block 351 crank (Windsor or Cleveland)
3.500 stroke
Most common rod length - 5.400
Most common rod ratio - 1.54:1
357 CID (.030)
359 CID (.040)
362 CID (.060)

Maximum allowable for a 351 crank in a 8.2 inch 302 block due to piston design limit and rod ratio. These are the lowest rod ratios for the 302 block/351 crank combinations.

[wetback]

My apologies I forgot you could 347CI using the different stroke, that's why i mentioned the thinner walls.

[RLG34750]

Originally Posted by wetback

My apologies I forgot you could 347CI using the different stroke, that's why i mentioned the thinner walls.

Its ok.....

Trust me this crew will school you on 347's......

[lucky7300]

i say build a 342 if your stickin with the stock block unless you really need to bore it then go 347. 5racks i say get a darts new sportsman block have them stroke it to a 347 and u have money left