Re: Russianred's Turbo Build Thread!
Update! Awesome news. Going to pick up the head from the engine shop in an hour. No warp, passed pressure-test and vacuum tests with flying colors, resurfaced 0.005 of an inch. Also it was cleaned and degreased, so I hope it looks purdy!
Bad news is that one of the top bolts on the downpipe seized in the hole near the top and snapped off, and an extractor bit broke off inside too.. So now I have 8mm of metal blocking up one of the holes and ruining most of the threads. The machine shop quoted me
$100 to repair it! They would be using a Heli-coil thread insert after extraction etc, but hell $100!? That's like theivery. I'm just going to extract everything myself (without using an extractor bit), expand the hole, and rethread it for a larger size bolt. I can post a pic, but it's pretty self-explanatory - imagine a broken off seized bolt blocking a hole.
Also in the events - cleaned the whole intake manifold. There is the top plenum:
Notice the Blacktraxx IACV adapter plate. I tried to get it off, trust me. It won't budge regardless of what I do. Melted to the IM with Hondabond lol. I guess I'm going to leave it, and just put some more RTV around the seal just in case. I pressurized the IACV inlet/outlet areas on the plenum at 20PSI and not a single leak from behind the IACV as it is, so I don't think it will present a problem at all.
Inside of the clean plenum:
Another thing I did was port the exhaust manifold. Notice how in the first pic the opening is uneven, and obstructed. I believe this casting imperfection could have easily cost me a few horses during my last tune.
After:
Straight up expanding the port resulted in some internal sharp lines edges. To fix this aerodynamically, I blended the ports after expanding the main opening. It looks like there is a sharper edge there, but there really isn't - it's all round, polished, and very smooth transition.
Other (more obstructed) side:
Thoughts or comments appreciated. Will maybe do some more polishing of the exhaust and intake manifold runners, but no more porting since I do not have the time and professional facilities to port-match each runner to the head ports myself.