I have been making some progress....

I ended up cutting the flange off of the manifold, building and re-welding a new flange that was tapped for the TSE 10mm inconel hardware. I also decided to go VVT. Because need has vvt for torques. Everything takes money and that takes time to get, so I also sent a few parts to get powder coated. Paint shop owes me favors, so that was a gimme.


https://www.miataturbo.net/attachmen...ine=1438533544


https://www.miataturbo.net/attachmen...ine=1438533544

Now I need help. I have like 20 open vacuum ports on the manifold and have no idea what ones to use, and what ones to cap off. I thought I had taken pictures before I took it all apart, but I cant find them now. Im using the vtcs manifold, with butterflies removed, along with lots of bumps and sharp corners on the inner tract. I am using the 2002 throttle body as well. Can someone PLEASE direct me to some sort of directions as to how I should be routing the vacuum lines.

Looking all sorts of pretty.
Use whichever ones you want/need (such as boost gauge, megasquirt, etc) and cap off all the rest. With vtcs and smog junk removed all those ports are just...ports. I used the one on the back top for the ms, one in the middle for the bov, and capped/looped the rest.

Excellent, thank you.

actually my mistake, just checked over my pictures and I used on of the ports behind the tb for the bov. cap the middle port (in the lower/middle of all the runners) because it doesn't get a whole lot of air and wouldn't be the best for teh bov

illustration

https://www.miataturbo.net/attachmen...ine=1438538519

Thanks man.

18, in the above image that you have labeled "MS", I'm guessing you T'd off the vac line for the brake booster? (because that's where that line goes...)

nope. the big one is the booster, there's a little one too that I use for MS
https://www.miataturbo.net/attachmen...ine=1383100023

Oh crap, never mind. The fittings are all different on my squaretop. Derp! Sorry :facepalm:

Also, Ryan, that motor is ridiculously clean. Good jorb sir. :bigtu:

Thanks man. Its been a really looooong process..

After looking at a pressure map for the lil' 2560...im planning on running it at its limit. My question is, How do I keep from over spinning this thing when I am so close to its threshold? I need to keep the wastegate closed for as long as possible to keep power up, but it seems like that is a delicate dance when so close to the limit. I looks like I could actually explode this small turbo. Am I understanding this correctly?

The goal here was to have boost lag at a minimum, with good power. Do I just have to accept that with low lag also comes low boost?

Do you know how many turbo's are ran well PAST the actual posted compressor map? for years and years?
Like every other subaru, evo, and srt4, and dsm, to name just a few.
lol "explode"

Now, whether you'll make more power past the limit vs just under on pump gas, now that's the better question. With proper fuel you'll make a lot of torque. But past the flow limit of the turbo your horsepower gains will be pretty dinky.

I see. So run alofit, with enough fuel to prevent knock, and see what I get. HP will just peter out when it's at the end of compressor flow capabilities?

If this is true, then will my waste gate ever need to do anything?

This all sounds super noob, I'm sure. I've just never ran anything quite like this. Past turbo experience was on VW stuff that was pretty forgiving and making much less power.

ha, speaking of vw, pretty much everyone I've seen with a 1.8t runs like 20psi on the dinky k03, which iirc is about the size of the msm ihi (read: microscopic). Like twice what it's built for.

The wg will prevent you from spiking to something like 35psi in the midrange and probably blowing the turbo to smithereens LOL. Up top it will just stay closed (or as closed as it can with all the pressure attempting to push it open)

IIRC, overspinning it can kill the bearing if you do it long enough. Certainly the VW guys who turn up the boost way up with chips experience significantly reduced turbo life.

The 2560 pretty much just stops making more power when you get to the top of its range, so it's not hard to figure that out on the dyno.

--Ian

Got some more good stuff done tonight....so here is some oil and waterline porn.
https://www.miataturbo.net/attachmen...ine=1438919378


https://www.miataturbo.net/attachmen...ine=1438919378


https://www.miataturbo.net/attachmen...ine=1438919378


https://www.miataturbo.net/attachmen...ine=1438919378

Two of my favorite tools of this build. Bolt stretch gauge, and the rigid flare tool.


https://www.miataturbo.net/attachmen...ine=1438919378

Got some more good stuff done tonight....so here is some oil and waterline porn.
https://www.miataturbo.net/attachmen...ine=1438919393


https://www.miataturbo.net/attachmen...ine=1438919393


https://www.miataturbo.net/attachmen...ine=1438919393


https://www.miataturbo.net/attachmen...ine=1438919393

Two of my favorite tools of this build. Bolt stretch gauge, and the rigid flare tool.


https://www.miataturbo.net/attachmen...ine=1438919393

oh myyyyy, hardlines :drool:

You recognize that old turbo?

Of course. Did you sandblast it? it looks immaculate