I haven't had a lot of time lately to work on the build, but I did manage to complete two entire mounts (front & side mounts) and only then realised a few things which resulted in having to scrap the mounts I made :(
1) The front cut and engine had moved slightly while in the engine was in place so the mount positions ended up being incorrect.
2) When the rubber mounts are at 45 degrees, the rubber was under more shear force that I would have liked so a little bit of research into how they are mounted for many V8's, I decided to redesign them to sit at 30 degrees. The pic below indicates how much of a reduction in shear force and increase in compression the mount will have when changed to 30 degrees. The grey block represents the rubber mount, green represents the steel brackets.
3) I thought I could work on all the engine mount designs while the engine was still in the front cut, but it was a bit too tight to get to the rear mount area, so I measured a few key distances between parts of the engine and subframe - so that I could replicate the engine position when putting the subframe & engine in my subframe jig instead - and give myself lots more room to move around. The pics below show the six metal bars I have bolted to various parts of the engine and tack welded to the subframe to prevent the engine from moving this time. Note also how I have had to replace the jig front corners with (removable) steel flat bar because I couldn't get the subframe bolted into the jig after the side spars have been welded on.
One bar on either side of the turbo, and one one the gearbox
One bar on the gearbox, one on the intake manifold and one on the equaliser driveshaft bracket (if you look carefully)
1) The front cut and engine had moved slightly while in the engine was in place so the mount positions ended up being incorrect.
2) When the rubber mounts are at 45 degrees, the rubber was under more shear force that I would have liked so a little bit of research into how they are mounted for many V8's, I decided to redesign them to sit at 30 degrees. The pic below indicates how much of a reduction in shear force and increase in compression the mount will have when changed to 30 degrees. The grey block represents the rubber mount, green represents the steel brackets.
3) I thought I could work on all the engine mount designs while the engine was still in the front cut, but it was a bit too tight to get to the rear mount area, so I measured a few key distances between parts of the engine and subframe - so that I could replicate the engine position when putting the subframe & engine in my subframe jig instead - and give myself lots more room to move around. The pics below show the six metal bars I have bolted to various parts of the engine and tack welded to the subframe to prevent the engine from moving this time. Note also how I have had to replace the jig front corners with (removable) steel flat bar because I couldn't get the subframe bolted into the jig after the side spars have been welded on.
One bar on either side of the turbo, and one one the gearbox
One bar on the gearbox, one on the intake manifold and one on the equaliser driveshaft bracket (if you look carefully)
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