8.1 inch rod in stock block/stroke 350 and -----
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8.1 inch rod in stock block/stroke 350 and -----
the top ring won't be coming out of the top of the block!
This is a teaser!
DV
This is a teaser!
DV
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Re: 8.1 inch rod in stock block/stroke 350 and -----
I am going to guess no rings involved. The rod looks like a stretched 70's vintage smallblock rod.
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Charlie,Carnut1 wrote:I am going to guess no rings involved. The rod looks like a stretched 70's vintage smallblock rod.
All the rings will be in the bores. You are right about the rods - 2 chopped 350 rods welded togeher.
DV
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Re: 8.1 inch rod in stock block/stroke 350 and -----
I hope that rod was x-rayed and heat treated after welding. Interesting experiment.
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Re: 8.1 inch rod in stock block/stroke 350 and -----
I always liked the longer rods, I did a small journal 391 chevy with 6" eagle H beam rods. 3.825" stroke I think, made for a very short piston with the pin in the oil ring. I really don't see how that long a rod can be made to fit a 9" deck and a 3.48" stroke. Thanks, Charlie
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Hmm.... At first I was thinking grooved pin buttons, but now I am wondering if the wristpin tolerance was tight enough you could put the rings UNDER the pins. Or maybe just some grooves for O-rings, the piston and pin wouldn't get hot enough to affect some of the higher temperature O-ring material and there'd be no flow through the area so any gas there would be stagnant anyway.
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Re: 8.1 inch rod in stock block/stroke 350 and -----
the advantage of the long rod is weight saving in the piston. the ratio is 2 to 1 for 1 gram of weight you add to the longer rod you save 2 grams in the shorter piston
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Re: 8.1 inch rod in stock block/stroke 350 and -----
I would not trust it as far as I could throw it. Going to be using a .25'' thick copper gasket?
Re: 8.1 inch rod in stock block/stroke 350 and -----
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?
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Re: 8.1 inch rod in stock block/stroke 350 and -----
I'm thinking it doesn't have a traditional wrist pin but rather some kind of captured ball and socket arrangement right under the Piston deck maybe theres a hole in the piston deck and the pin goes on top. I think I've got it. the deck of the Piston splits with the top cap unbolting and reinstalled after the rod and pin are in place
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Trust me here but these rods will survive the peak rpm involved for at least 500 hours. Also no head gasket involved.BigBlocksOnTop2 wrote:I would not trust it as far as I could throw it. Going to be using a .25'' thick copper gasket?
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 -----
Sure...... A stock "350".
But a 350 what?
Might be a 350ci twin cylinder engine that turns less than 2000rpm.
But a 350 what?
Might be a 350ci twin cylinder engine that turns less than 2000rpm.
Somewhat handy with a die grinder.
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Re: 8.1 inch rod in stock block/stroke 350 and -----
Good try PRH but no it is a 350 Chevy block 9.025 height.PRH wrote:Sure...... A stock "350".
But a 350 what?
Might be a 350ci twin cylinder engine that turns less than 2000rpm.
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 -----
ive no idea how you can squeeze that long a rod in a stock 350 block without talking something like a 9.5" block with about a 3" stroke crank, maybe even a shorter stroke, and just a big bore...idk. an 8.1" rod in a 9.025deck block dont leave much room for piston pin height nor any kind of stroke on the crank.