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Nice! I reverse engineered mine from a 3D scan of the stock manifold. The injector angle was a tricky part.
A bit of an update. I decided I should do a test torque of the runners before gluing everything together. The result, total failure. Crapola...
I torqued them early on but this time I used the proper plastic intake spacers. I think what happens is that the intake spacer is soft and deforms under the 3,000 lbs of clamping force for each of the mounting bolts. The compliance of the spacer transfers a huge amount of load across the full face rather than just below the bolts. The plastic flange has basically zero flex so it cracks.
The plastic flange would work on a metal surface but it's not going to work on the soft plastic spacer.
So...the plan is to have the lower sections 3D printed from Aluminum and then bond them to the nylon intake. It's an extra $350 and a little annoying.
I think I'll take a break from this and get the turbo plumbing in order.
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