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I want a stroker 3400. I know that the crank can be milled to make a longer stroke, but that would make the crank sensor send the signal at the wrong time. I also know that the 3600 crank has more stroke, but the journal diameter is not the same. Is there a link somewhere on this topic so I can give up on thinking about all this? It's just that there is a ratio, stroke vs bore that is. GM thinks that it's better to have more bore than stroke and that's not right. I saw in Hot Rod where they built a 355 and a 383. Both were built the same and the 383 beat the 355 in the 1/4(the 383 got into it's power band quicker). Though a 3400 vs a 3400 with a stroke would be more like a 350 vs a 377. This is mostly a carry over from the days when I wanted a 383. I just want a little more stroke for the 3400, not a big change like the 383 was. More like the 2.8 vs the 3.1.

Big bore = HP and High RPM capability

Long Stroke = Torque and the better the possibility of rod/crank failure

Think 302 (Z28) and 307 Small block chevys.

302 = 327 block, 283 crank. Big bore, short stroke. Lots of RPM

307 = 283 block, 327 crank. Small bore, long stroke. Basically a smogger/torque engine.

Now of course there are other considerations, and the argument for more displacement does matter, but generally speaking a shorter stroke, big bore engine is the stouter of the two.

If you are building a street engine, go for torque. (How often do you actually red line a street engine??)

Race engine go for strength and RPM capability.

I read that article and I am of the opinion that the cam they selected was probably perfect for the 383 and likely too much duration for the 355, which would have benefitted from more lift.

Having said ALL of that there is alot more to making an engine of any size make power than simply displacement, although it doesn't hurt. However the increase in displacement you are considering will probably not make any difference that would be measurable.

The 3500 makes more power than a 3400, yes, but it has very little if anything to do with the extra 100 cc's

Man you are taking me back. Boy are we old.You read the same article? That's great! Yeah I think it was kind of adhoc, they pushed the test over to the engine that they wanted to win. My car is a street car and I need as much low end as I can get. I thought it would be cheaper and more easy to find if I didn't go for a large stroke. I would like one, but as you know parts are hard to come by. Too bad that GM didn't make a FWD 4.3 and stuff it in something. No that would be to easy for us. It would take as back to our roots.
The larger stroke has alot to do with kinetic energy. Which falls under the ratio I was talking about(bore vs stroke). I know what you are talking about Eric. 383 vs 302 that is. I'm not looking to spin 8000rpm or something near that. The lower end would have to be too beefy and I don't have that kind of money.