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VCT Plumbing Got the hardlines mostly done for the intake phaser control. Went well just tedious and time consuming. The bottom two lines are advance and retard and the top two lines are returns. The center is the feed. They are 5/16 OD which gives me an ID that closely matches the Honda circuit. It started off easy and then I remembered that an alternator needed to sit in there. That made things a little more interesting. The bulkhead fittings worked out great. I chose to use soft aluminum tubing for the interior lines. I knew routing them was going to be a bitch and I wasn’t wrong. Looks a little rough but it will work. Non of the fittings are compressed yet. I’ll lock everything down during the final assembly and then tweak everything so they have clearance. Feeding through the caps turned out to be a better way to go than through the tower bases. I had to redesign the EDIS coil bracket since the valve was now in the way. It’s not as hidden as it used to be but when the throttle bodies and stacks are on it should be buried pretty well. I’m super glad I went this route with the VCT valve. The look of it is exactly what I wanted and he hard lines fit the whole theme of the build. Lots happening over the next few weeks as I try and finish it up and get it back in the car.

What no pics! Did you take break for awhile?

What year S30? The early-year cars came with open R180s, and some of the last year cars came with R200s. I don't believe any of the standard differentials were LSD from the factory. Most people putting down serious power in straight-line applications use the R200...it's quite a beefy unit. There are quite a few threads here about the different options available, so search and you should find all the info you could possibly want, and make sure you check out the pinned threads too. Hope this helps.