The 935 front suspension puts much more load on the front '3-bolt' mounts, so I added an upper plate to the front bolt. The pic shows it tacked before the full welds. I also added more welds to the reinforcing plate at the rear two bolts, and at the panel joints around the front mount. Additional welds were added to the bottom of the front mount area. It also helps to square up the weld nuts to the pan before welding in all the reinforcement, they were a little crooked when the replacement pan came out of the box.
The center duct was stitch welded on the inside and outside of the body panels to insure a good transfer of side-to-side forces from the front crossmember to the bulkhead at front of the tub, where the x-brace mounts will be located. You can also see the additional stitch welds I added to the remaining part of the original pan and left longitudinal.
I reduced the width of the center duct to fit the cooler a little better. Steel plates were added to the two 'humps' above each upper corner of the duct, tying them into the stock bumper shock brackets. These mounts will receive a bolt-in bracket from the inside to support the front ends of the x-brace, sandwiching the bulkhead metal between the outer and inner plates, and spreading the load out to the front pan and bumper braces. They also gave a place to mount the front cooler.
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1986 911 Turbo
3.3L, K27HFS, Tial 46mm, TurboKraft Intercooler, 964 Cams, Monty Muffler, MS3Pro Evo, M&W Ignition, Zietronix WBO2 Data Logger, Wevo shifter, coupler and motor mounts.
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