H Cylinder Head Combustion Chamber Volume

Pintopete

New User
Hi, does anyone know the measured combustion chamber volume for the common H cylinder heads? I am most interested in the 8043 vs 8776.

Thanks, Peter.
 
No I don't know, but I wonder if a person could calculate it. Displacement is 152 cubic inches for the model H, compression ratio is not that large, maybe 5 or 6 as I recall. That might mean 152 / 4 = 38 cubic inches per cylinder, divided by 5 or 6 would mean 6.9, call it 7 cubic inches displacement per cylinder at full compression. Might be right?????? How's that for a SWAG? [What we used to call a Scientific Wild-A## Guess.}
 
Good idea. Tractordata lists the gas version, assuming the 8043 head, at 5.9:1; the distillate, assuming the 8776 head, at 4.75:1; and the kerosene,
assuming 6186 head, at 4.5:1. Just have to do the calculations to get the theoretical volume. I would think that one of the pullers or someone running a
turbo, would know.

Thanks, Peter.
 
If I recall the gas head 8043 is 118cc and a kero head is 145cc. I've never cc'd a distillate head but looking at the chamber size it looks to be somewhere between the gas and kero.Just for comparison a 300 head is 113.5cc. These will vary depending on if the heads have been machined.Hope this helps.
 
The way I've seen it done is with a buret of water, a plexiglass plate with about a 1/2" thru-hole that's siliconed to the deck surface. Valves & springs and spark plug installed. Buret fills the head until the water is level with the underside of the plexi, measure the change in volume of water.
 

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