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After the Texas Mile event I decided my 18g setup was working to hard. The post compressor temp were well over 300 f . So I decided to up grade the turbos. Originally I was looking for gt 3071 but found a good deal on rebuilt alpha 3076s. I knew I would need to improve the inlet and exhaust to help the bigger turbos. So I designed a foam model of the inlet "y" then wrapped in fiberglass and melted the foam out with acetone. I was able to use the center section rubber couplers to join the lower tubes to the turbos. Overall I increased the circumference of the tubing 50% after the split going down the front of the engine and around to the turbos

Exhaust, I wanted a quiet 3" exhaust with minimal restriction. So I found the muffler packing material and perf and started drawing up the cross over section. When I finished the cross over I then fitted the outlets and tips on the car

Fuel system,
I've been toying with the idea of going E85 the cooling properties can't be ignored. The combination of texas heat, air cooled motor, and the need for speed and the pump is about a mile from my shop.
I built the fuel system but don't plan on changing fuels any time soon.
6 months or so

Upgraded clutch, again!
The 764/ gt2 disc wouldn't hold,so I went to a Spec metallic/fiber setup. This setup was miserable everyday was my first time driving.
I found a tilton triple disc from a corvette and converted the setup to porsche using the tilton 18.5 lb flywheel.
Having issues with attaching pics so I will get off my phone and try the PC

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Ruff shape

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Some shaping

Basal Skull

Wow that looks great! I need to get some foam for modelling... How are you getting the larger diameter fabricated tube past the suspension components to the turbo inlet. I fiddled with two smaller diameter tubes to get between the suspension/body parts at one time but gave up. I like the acetone melting foam idea, I've made stuff/carved things out of ice (only able to take it out of freezer a few mins at a time to prevent form melting too much while carving) and then poured material over top, allowing the ice to melt away after the material set.

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Basal,
when I was roughing in the shape I mounted the cross brace to the engine to simulate the space I had to work with. The concept was good but I had to tweak the fit several times. I think I put the engine in a out about 4 times. I also had to make a low profile cam housing cover and custom spark plug wires to accommodate to twin plug

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1st of 3 layers of Fiberglas tape 50% overlap

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Passenger side turbo

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Almost finished

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Ok, I got a little carried away with the fuel system. I wound up using 2 10 an lines to gravity feed a 2 gallon sump tank that sits where the front diff use to be.
I wanted 1 pump to do the job so I used a magnafuel 4303 pump inside the sump tank and ran a 10 an to a y fitting and 8 an line to the rails then return with 10 an. I used all Teflon with stainless lines.
The lines are ran in the factory locations with minor tweaks.

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Made some changes since this pic. But close enough.I made a bracket with isolators that mounts the pump to the end cap of the sump tank.
I then tied a vent line from the top of the sump tank to the vent tank that sits on top of the factory gas tank. I also added a vent to the factory setup. The pump is very quiet being inside the sump tank.

tacker

I had some 6" OD tube lying around. I made a tank using 15 1/2"
Originally I ran the return to the sump but the turbulence inside the tank was so bad that air would get trapped inside and the system would only vent when the pump was off.So I made a custom return fitting as well. So far everything can easily be reversed. I was able to save all the original lines.

Basal Skull

Tacker, your fab skills are at another level! Love the sump tank idea you were mentioning before, and the story about return tube and turbulence, stuff you can only figure out by trial and error - great stuff.

Basal Skull

click on 'go advanced' below quick reply, then below the text input box there is a attach files box 'manage attachments' - then you can select and up load multiple pics.

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I bought some extrusion designed for fuel rails. Machined and sent to anodize then engrave. This pic also shows a custom bracket I made for the factory blower and wire connection bulkhead

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crossover tacked welded. I change the length of the top mufflers to match the bottom.