"Can anyone tell me if anyone else has made a manifold that fits with ac and power steering as well as being equal length, and even twin scroll? Forget about it being stepped runners, nobody has done that on a bp turbo to my knowledge".

Hi Boost, for what it's worth I'm built mine about a year ago. I didn't start from a clean sheet of paper, but I've super happy with the results. AC is intact but I'm running a depowered rack.
https://www.miataturbo.net/diy-turbo...o-build-79259/
What compressor housing are you using?

I think he was referring to you thinking that schedule 10, equal length and ac fittment was something new. ARTech,Turbo Tim , and even Shuiend have been at this a while.

I think he's referring to tuning and not blowing sh*t up.

Looks good! I like those Evo turbine inducers.

Yeah I mean I did a bit of searching, but I think it being such a specific request made it tough to find. Very rare to find ac, power steering, equal length, twin scroll and sch 10. Yeah I personally won't be running power steering, but I need to put ac back in my car, Florida is just too hot. I do want to be able to sell these though, so for what it's worth to me it needs to be able to fit with all of the cars accessories. Turbo is a 50 trim t04e .63 twin scroll rear. Genuine Garrett with zero miles, just been sitting on a guys shelf, $350 was a steal lol

Good to see its been done though. Nobody has done a stepped sch 10 turbo mani on one of these though I'm pretty sure, so I'll have that lol.

To the above, yeah it's gunna be fine man, I've seen 1.6s make 1200hp. I didn't say Miata, but whatever it's just another engine. I'm producing my first win turbo Gallardo systems soon, I'll feel more worried about guys who want 2000 hp there than this little guy at 500. I'll probably pump like 400ccs of water pre turbo when I build her too, a bit of head work and cams. Can't see why 500whp+ isn't possible with this turbo. Just needs a nice intake mani, I'll whip something fun up.

So ive done a little bit of work. Got my old motor out, received my new motor. Still gotta do little things like drill and tap the oil pan. Still gotta clean up some more parts, do some more sandblasting. Hopefully can get the motor in tonight and begin mocking up my manifold tomorrow!

https://cimg9.ibsrv.net/gimg/www.mia...84524a7b5.jpegMy fresh 1.8

https://cimg0.ibsrv.net/gimg/www.mia...03ae5aae1.jpegTrimmed the front cover off to my likings, then sandblasted her. Still not sure if I want to paint it or not, sandblasted surfaces don't stay nice easily..

https://cimg2.ibsrv.net/gimg/www.mia...3954b90c8.jpegVertical flow core I found laying around. Not my favorite look and packaging, but they're efficient.

https://cimg4.ibsrv.net/gimg/www.mia...4c4cdbd72.jpegNot quite done here, but I gutted and ported this intake. Kind of a waste since I'll be building a custom intake for her soon enough, but it should be worth some ponies with more laminar flow and a larger plenum!

I didn't do a twin scroll equal length that fit with A/C & P/S, but I'm sure it's possible.

Also, people describe their manifolds as 'equal length' if it only kinda sorta looks equal.

powder coat clear?


On that note, will the VVT solenoid housing gasket seal up against a media blasted surface? Don't know if the surface has to be refinished or if it matters since the gasket material isn't rubber. Also hopefully your vent passages are all clean of blast media. That shit is nasty for motors

That is a bit of a harsh way to put it, but there were significant spool gains and midrange torque gains to be had with VVT. You've lost that, but at least you still have the higher flowing NB2 head.

Here I've got a few for you now, there will be more.



https://cimg9.ibsrv.net/gimg/www.mia...3f529caec.jpegI like little details like this little plug I machined. Only took 3 minutes, but looks clean.

https://cimg1.ibsrv.net/gimg/www.mia...37e7fbab1.jpegWelded from the inside!

https://cimg0.ibsrv.net/gimg/www.mia...3e72e028f.jpegThe block off plate that I made for my TEMPORARY inactive vvti. Surely I'll hear another story about how this is stupid though, even though my ms1 can't control it lol.

https://cimg2.ibsrv.net/gimg/www.mia...80ae5580c.jpegSomething like that, still dialing in the exact position.

https://cimg4.ibsrv.net/gimg/www.mia...f00269ece.jpegAlways use engine hoists to hold your turbo in place and your gunna not be so mad at everything. Making sure I've got an inch all around that turbo so I can build a kit with any turbo any customer requests.

https://cimg5.ibsrv.net/gimg/www.mia...2c668a294.jpeg

https://cimg8.ibsrv.net/gimg/www.mia...164468e65.jpeg

from

Subscribed for fabrication pics and information... staying sub'd and following on Instagram. No issues here. Really looking forward to seeing what you put together. Even though I wouldn't agree with the VVT move, I have to say the parts you machined to do it look damn pretty.

I am pretty sure you are going to have oiling issues with that block off plate on the VVT section. I believe the cam gear will need to be filled with oil even if VVT is not enabled. I would not run the car like that and expect the head to last.

Still to be determined, In my opinion. Its still super early in the build stages, but I haven't seen anything earth shattering yet. The plug is a good first project for an intro to lathe workmanship. Not trying to shit on this thread, but a little less patting ourselves on the back, and more sweet parts would be cool. The "I'm a bad ass, look at me go" attitude is kinda cheaseball. Call me a master fabricator, this took me three minutes, etc.

Still really interested to see this build materialize. Keep going, we want to see cool stuff!

I was just going to post this, I think the first bearing in the cam gets its lubrication from the VVT gear.

Pretty sure without oil pressure, the vvt assembly will eat itself alive.

EDIT: I'M always late around here..

I just don't like seeing vvt heads goto waste.

You can use the ms1. You just need to hook all the oil lines up to the cam gear. Then just leave it unplugged. You will need the cam sensor one day when you do want to make vvt work.

Might be worthwhile just finding a BP4W head for simplicity. Then you can build the VVT head while you have a functioning motor and go ape nuts with t4 twinscroll

Anyways, despite all of the distractions from my car I have gotten a start on my turbo manifold. this part took a bit of time to think up, the manifold is kind of built around it, it has to be built first.

This is is a true 4 into 2 design, with a split passage wastegate tube going to a single gate.


https://cimg6.ibsrv.net/gimg/www.mia...31ed6c0cc.jpeg

Sure. Just as long as you stop being such an entitled prick that gets offended at the slightest criticism.

Cleaning up your thread now.

Just FYI, the #1 camshaft journal is oiled from the VVT mechanism that you've removed. The others are oiled from the cylinder head, but that one gets lubrication from the VVT system. Your cylinder head will last around 5 minutes in its current configuration before the intake cam seizes/breaks from oil starvation.

thank you, yes someone has pointed this out to me already. Does anyone have a diagram for the oiling on this vvti head? It appears the oil goes up into the solenoid and then back down. I could always throw a plug in there and that would complete the cycle.. Assuming I am seeing it correctly. Yes I know all of you think it's pointless to block it off, but again my ms1 can't control it, and quite frankly I'm not in the mood to go buy all these vvti parts which I don't have, just so it can sit there doing nothing. Anyone that can confirm or deny what I just said above would be much appreciated.

A few pictures I just snapped of my slow progress. Been getting distracted by a water cooled exhaust for a supercharged 13b speedboat.


https://cimg3.ibsrv.net/gimg/www.mia...cb3bc975b.jpegCut, beveled, wire wheeled and cleaned.

https://cimg5.ibsrv.net/gimg/www.mia...eefaffccf.jpegTacked

https://cimg6.ibsrv.net/gimg/www.mia...69ac57f52.jpegMaybe I can have her all tacked and done by 2am, gotta stay focused.