The Ford Barn

Fatheads4ever · 08-20-2021, 09:14 PM

Hi All.. Just wondering if a relieved block has anything to gain over the standard type block. Do you think it might be prone to burning exhaust valves because the outside edge is more exposed during combustion?
Regards Kevin.

I've just acquired a relieved motor. was told it was from a Brengun carrier. It's not the type of thing I would do to an engine myself.

This is the second one to have passed through my hands.
The first one was recovered from a boat in the 1980's and the sump was full of sand. I noticed that the heads were different in the area over the piston tops. They had much more meat covering 'more' than half of the piston. I assumed this was to compensate for the loss of material from the block so as not reduce compression.
I think I still have these heads in my stash.

Could I bolt them onto a standard unrelieved block to increase compression?

08-20-2021, 09:14 PM	#1
Fatheads4ever Member Join Date: May 2021 Location: Auckland New Zealand Posts: 59	Relieved Block Hi All.. Just wondering if a relieved block has anything to gain over the standard type block. Do you think it might be prone to burning exhaust valves because the outside edge is more exposed during combustion? Regards Kevin. I've just acquired a relieved motor. was told it was from a Brengun carrier. It's not the type of thing I would do to an engine myself. This is the second one to have passed through my hands. The first one was recovered from a boat in the 1980's and the sump was full of sand. I noticed that the heads were different in the area over the piston tops. They had much more meat covering 'more' than half of the piston. I assumed this was to compensate for the loss of material from the block so as not reduce compression. I think I still have these heads in my stash. Could I bolt them onto a standard unrelieved block to increase compression? Last edited by Fatheads4ever; 08-21-2021 at 04:10 PM. Reason: Adding additional info