3 Main Bore Dimension

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Curtis
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3 Main Bore Dimension

Post by Curtis »

Someone must have a manual with this. I looked at every manual in the wiki. All crank but no block dimension.

5 main is different. 1500 and 1600 3 main are the same. A photo of it would be good.

Thanks, Curtis
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Curtis
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Re: 3 Main Bore Dimension

Post by Curtis »

To make this clearer, I do not want piston bore. I want the dimension of the 3 main bores that the bearings and crank go in. I have the crank diameter and bearing thickness. You would need this to align bore the block front to back.
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Mike Unger
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Re: 3 Main Bore Dimension

Post by Mike Unger »

Hi Curtis,

I don't have the measurement handy (I may be able to find it) but FYI align honing these blocks is usually not necessary even for race engines. The quality of the cast iron and the original machining is so good that it isn't necessary unless something unusual happened to the engine. This is different than what might be necessary for American and British engines from the same time period.

Mike
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Re: 3 Main Bore Dimension

Post by Curtis »

I'm wondering why this is needed to get a deck height? Lay a straight edge across the bearing flats and measure to the deck is what
i would think.

Gordon Glasgow listed a height of 8.937 inches for both R19 and U20.
66 stroker, almost done.
67 basket case, paint coming soon.