longevity?Perhaps I misread it....but I was basing my response off of this breakdown. Not sure what other way there could be to take it?
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That's straight out of the sticky, which is a really thoroughly explained work up of the technical differences and options in the 331 v. 347 debate. Go read through it, Brian. I'd have to say that the assessment is fair. I own a 331 too, but I differ with your opinion of your 331 being more rev-happy than a similar 347.
Regarding the excerpt quoted, first that was, as it states, a summary of the author's, 5spdGT's, opinion. Second, 5spdGT did a fantastic job researching and studying this particular issue. Last, I fully support and agree with his opinion.
Chris
Regarding the excerpt quoted, first that was, as it states, a summary of the author's, 5spdGT's, opinion. Second, 5spdGT did a fantastic job researching and studying this particular issue. Last, I fully support and agree with his opinion.
Chris
Please excuse my talking out of my arse here, this is mainly a question: Based on the write up in the sticky, would logic agree that the 331 would rev easier due to the shorter dwell at the top and bottom of the stroke?
I'd also think that it would be heavily dependent on parts used. A cheap, heavy assembly would not be as snappy as a balanced, lightweight assembly.
Sorry for coming across as salty, but in the years I've been around these and other forums, I've seen this discussion hundreds of times. Honestly, this is a subject that bores me to tears.
If you really want my thoughts on the subject, you'll have to use the search function.
If you want to see someone testing the limits of a stock 302 block and a ford sportsman block, check out "marc Arnold's cobra" on google. If you want the cliff's notes (old enough to know what those are?), Marc experienced main bearing walk at around 7,500 rpm with a 306. Similarly, he ran a 347 to around 8,000 rpm and also experienced cap walk. I think you'll be in the same boat with a 331. Also, I can't quote the weights, but I really don't see how the weight of the rotating assembly would be much of a difference. The only significant difference will be the .015 difference in the crankshaft throw in each direction. Yes, dwell time changes, and the rates of acceleration are higher. It doesn't matter. The 347 makes power lower, and can be revved as high as a 331 or even a 302. Hell, keep carrying the logic forward and you might as well destroke the 302 to a 289 so you can increase the "rev happiness."
If you really want my thoughts on the subject, you'll have to use the search function.
If you want to see someone testing the limits of a stock 302 block and a ford sportsman block, check out "marc Arnold's cobra" on google. If you want the cliff's notes (old enough to know what those are?), Marc experienced main bearing walk at around 7,500 rpm with a 306. Similarly, he ran a 347 to around 8,000 rpm and also experienced cap walk. I think you'll be in the same boat with a 331. Also, I can't quote the weights, but I really don't see how the weight of the rotating assembly would be much of a difference. The only significant difference will be the .015 difference in the crankshaft throw in each direction. Yes, dwell time changes, and the rates of acceleration are higher. It doesn't matter. The 347 makes power lower, and can be revved as high as a 331 or even a 302. Hell, keep carrying the logic forward and you might as well destroke the 302 to a 289 so you can increase the "rev happiness."
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I think I get it now.. For example a Honda s2000 redlines at 9k or whatever but so what it has to get to 8k to make a max 200 hp?
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