Siamesed Bores??
What exactly is meant by siamesed bores, and what are the advantages/disadvantages?
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Re: Siamesed Bores??
Originally Posted by mycarisfasterthanyours
What exactly is meant by siamesed bores, and what are the advantages/disadvantages?
FWIW: "Siamesed" comes from "Siamese twins". The first pair of conjoined twins of any prominence (c. 1811) were Chang and Eng who were joined at the abdomen and shared a liver. They were originally from Siam, now known as Thailand, hence the name. ("Thailandese twins" is too hard to say. :) ) Siamesed bores are conjoined and are therefore stronger, especially for large bores, like 4.125 and above in a SBC with 4.400 center to center bore distance. The conjoined bores distort less so they can theoretically support more power. The downside is that cooling water doesn't get to that conjoined area so more heat is retained in the cylinder walls, and perhaps distortion could be more because the wall thickness and support varies greatly around the bore. IMO, for large bore-to-bore spacing ratios (like 4.125+ in a SBC), conjoined bores are the best choice. |
Re: Siamesed Bores??
Thanks, always been curious.
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Re: Siamesed Bores??
Originally Posted by OldSStroker
FWIW: "Siamesed" comes from "Siamese twins". The first pair of conjoined twins of any prominence (c. 1811) were Chang and Eng who were joined at the abdomen and shared a liver. They were originally from Siam, now known as Thailand, hence the name. ("Thailandese twins" is too hard to say. :) )
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Re: Siamesed Bores??
Originally Posted by kmook
Your wealth of knowledge never ceases to amaze me. ;)
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