400 Non Stroker Build

400 Non Stroker Build

I don’t know where anything sits on a big block.
Im not familiar with them.

80fbody said
Bet they're way, way down. The last one I measured was like .180 or something.

Stock slugs? IDK myself. But with the 440 slugs, you can move them upwards .153. If the OE 400 slugs are .180 in the hole..... then your .027 in the hole.

33IMP said
If your figure for the stock slugs compression height is right, (i am NOT questioning you, sir), my calculations show them .122 in the hole, assuming g blueprint specs.
So, what is that, 7 1/4 to one?

The piston spec look up was at summit for the replacement slugs for the 400 & 440. If the stock OE 400 is .122 in the hole, then the 440 slug goes up .153 putting the piston above deck more than a good bit.

33IMP said
Ran some numbers thru wallace compression ratio calculator. Assuming..... 90cc heads, .041 head gasket, .122 deck flattops with no reliefs, according to wallace, stock real compression is.....

7.13 to 1.

Should run on kerosine.

I was thinking Yak piss myself.