04:54:47am, Saturday, May 18, 2024
Stroking the engine????
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Registered: 02/09/2010 Posts: 237 |
Ok, so making a big bore engine is pretty straight-forward: punch the holes bigger, put bigger pistons in. But what about stroking??? Let me say that I really just don't know how it's done and would like to, so I am gonna ask. First, let's eliminate the options of a longer stroke crank that is factory available or custom, I can figure out how that works. But if you want to stroke a crank, what do you do? Do you just ofset grind where the connecting rods mount? Or do you cut and weld each spot to make a longer throw? Or something completely different? Thanks, I hope to learn something new. |
Re: Stroking the engine????
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Registered: 12/19/2010 Posts: 163 |
You can offset grind the rod journals to get a small stroke increase, but to get big, you will weld up the journals then offset grind to get the desired stroke. |
Re: Stroking the engine????
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Registered: 04/04/2008 Posts: 1,523 |
also the wrist pin must be moved up in the piston,shorter comp height,or the rod shortened.both must be altered half of the increase in stroke.ex;stroke now is 5" cto c of rod 10" pin ht 5"/half of stroke is2.5+10"rod+5"ph=17.5 deck ht---new stroke 10" so rod is shortened 2.5"(half of stroke)to 7.5" and pin ht of 5"/half of stroke is 5"+7.5"rod+5"ph+17.5 deck ht---or new stroke of 10" same rod at 10" and pin ht of 2.5"/half stroke is 5"+10" rod +2.5 pin ht+17.5 deck ht--- |
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