8.1 inch rod in stock block/stroke 350 and -----
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Re: 8.1 inch rod in stock block/stroke 350 and -----
2.500" spacers on block with 8 new tall sleeves. O ring block to spacers. Joe-71
Joe-71
Re: 8.1 inch rod in stock block/stroke 350 and -----
I thought about doing the piston wrist pin bore with caps that are fastened with bolts. Like main caps. That would be heavy, though, but would allow no wrist pin bore openings into the combustion chamber. Then the rings could come high up like in a modern piston, right up to top of the bore.David Vizard wrote:Well you and a couple of other posters are definetly moving in the right direction.DVptuomov wrote:So is this a piston design with rings below the pin? The wrist pin would have to be inside the dome somehow and rings below the pin.David Vizard wrote: stock 350 stroke and crank location DV
Paradigms often shift without the clutch -- https://www.youtube.com/watch?v=cxn-LxwsrnU
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Guys,
I had little idea the opening posts shot of a long rod was going to cause so much response and interest.
I am off 'down under' to do a seminar in Sydney tomorrow (Mon 25th Sept). I am excited about this one as due to the interest the last one in 2015 caused. I am getting a number of the chief engine development engineers from top teams attending.
Anyway due to this busy trip I won't have time to put up any posts so you will all have to fight among yourselves until after the 5th of Oct.
DV
I had little idea the opening posts shot of a long rod was going to cause so much response and interest.
I am off 'down under' to do a seminar in Sydney tomorrow (Mon 25th Sept). I am excited about this one as due to the interest the last one in 2015 caused. I am getting a number of the chief engine development engineers from top teams attending.
Anyway due to this busy trip I won't have time to put up any posts so you will all have to fight among yourselves until after the 5th of Oct.
DV
David Vizard Small Group Performance Seminars - held about every 2 months. My shop or yours. Contact for seminar deails - davidvizardseminar@gmail.com for details.
Re: 8.1 inch rod in stock block/stroke 350 and -----
We'll keep the octagon bloody until you get back, lol.
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Top teams?David Vizard wrote:I am getting a number of the chief engine development engineers from top teams attending.
Re: 8.1 inch rod in stock block/stroke 350 and -----
Hmmm.. what could be the purpose in extending the crankshaft lower in the block geometry? Interesting thought.sanfordandson wrote:Move the crank down?
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Re: 8.1 inch rod in stock block/stroke 350 and -----
He has already said stock stroke and crank location in stock deck 350 SBC and no head gasket, has indicated an abnormal CR ratio but not wether that is high or low.
Maybe this is a cooky 2 stroke build with long closed end smaller diameter cylinder sleeves with ports for intake and exhaust,, lol.
Maybe this is a cooky 2 stroke build with long closed end smaller diameter cylinder sleeves with ports for intake and exhaust,, lol.
Craig.
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Re: 8.1 inch rod in stock block/stroke 350 and -----
The ring stack is irrelevant to the C/H.PackardV8 wrote:Interesting math; check me here, but an 8.1" rod and 1.74" of stroke = 9.84"; can't stay under a 9.025" OEM SBC block deck, so that's already .815" out of the deck before we consider the piston and rings?
He just has to fit the rings, lands, and half the pins into a -.815 C/H
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Counterbore the head, and build a piston with a 1.000 top land......
Re: 8.1 inch rod in stock block/stroke 350 and -----
F1 has that kind of negative compression height such that the wrist pin is out of the bore?kimosabi wrote:F1 style piston with a short pin.
Paradigms often shift without the clutch -- https://www.youtube.com/watch?v=cxn-LxwsrnU
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Not that much but the pin sits just below the deck. I'm sensing offset pin and offset grind on the crank here too as well as a smaller pin. That pin has to be installed somehow either way.ptuomov wrote:F1 has that kind of negative compression height such that the wrist pin is out of the bore?kimosabi wrote:F1 style piston with a short pin.
Re: 8.1 inch rod in stock block/stroke 350 and -----
He just said stock stroke, stock crank location. There's no way to get the pin below the deck, I believe. The next logical question is how to get the pin inside the dome. I wouldn't want to expose the pin and the locks to the combustion chamber, not even with buttons on holes. I think multi-piece piston with some sort of bolted-on cap or caps is the most likely plan for these rods. Since the main reason that I see for doing all that is to reduce the piston weight for large dome piston (like in a hemi chamber), I don't see it really working out in net given the weight and complexity of a multi-piece piston.kimosabi wrote:Not that much but the pin sits just below the deck. I'm sensing offset pin and offset grind on the crank here too as well as a smaller pin. That pin has to be installed somehow either way.ptuomov wrote:F1 has that kind of negative compression height such that the wrist pin is out of the bore?kimosabi wrote:F1 style piston with a short pin.
Paradigms often shift without the clutch -- https://www.youtube.com/watch?v=cxn-LxwsrnU
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