I've got a simple motor mount design that attaches to 4 of the bosses on the center of the block. This avoids the strange curved design needed to go around the turbo if one was to use the std (rear) boltup. The Std mount is straight, but runs right into the turbo and waste gate.
Mount is a 115 by 95mm 8mm thick steel plate with the back machined for the different heights of the bosses (why on earth couldn't VW make them all in the same plane!). Plate attaches with 3 M10 bolts and one M8 to the bosses. A 50mm square tube is mounted (bolted for the moment so I can adjust it, will weld when done) at a 25.7 degrees angle to this plate. This puts the end of the square tube 1/8" away from the turbo and wastegate. The square tube is machined out to attach the motor mount as high as possible, and reinforced on the top to compensate for the hollowing.
The first picture to the left shows the plate and profile.
The three bolts in a triangle
are M10x25, the rightmost one M8x25. I machined a 25x30mm elliptical hole
into the square profile for access to the top middle bolt. To fixate
the profile so I could adjust the angle before welding I drilled
an tapped a hole in the plate and bolted the square profile to
the plate. Of course it has to be welded anyway for strength.
To be able to set the engine as low as possible the stud of the rubber mount was cut flush with the mounting nut. A small alignment peg on the rubber mount was also machined off. |
A plate with a second support is attatched halfway up on the
50mm profile. The plate bolts to an M10x25 and M8x25 on either
side of the turbo oil return line. To weld everything together
the two plates were bolted to the block, and the profiles were
clamped togehter. Thus everything was held in the right positions
for tack welding. To finish up, the now tacked together mount was
taken off and welded all around.
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The last picture shows the adjustment feature. The rubber mount can
be adjusted +-10mm along the axis of the square profile. A slot
is machined for the M10 stud in the square profile, and two slots
in the sliding reinforcement bar. For minimum height the hole for
the rubber mount stud in the reinforcement bar is machined down
4mm.
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Base plate to be mounted just above the oil pan on the bosses
below the turbo oil return.
Square profile to mount on the base plate.