Monk

iTrader: (3)

Centrifugal to EFR to roots to journal bearing chinacharger.
For simplicity's sake.

glade

iTrader: (2)

For simplicity sake.. hell, he's already been done it!

patsmx5

iTrader: (16)

I wasn't doing 5th gear pulls from 2K, I think that's pointless as nobody drives like that. I think running both wastegates with no boost controller is 1/2 the reason it's laggy. Could be a boost leak, haven't tested that yet but will once I've got a few miles on it.


I'll try to make a vid tomorrow. Today I was busy as I started it for 5seconds and then off, unhook front turbo drain, crank and verify oil flow, then same test for rear, then adding oil/coolant as needed.

It sounds loud, like an open downpipe car, but not as loud.


Yeah, it's either a 2860 or 2871 equivalent (don't remember), journal bearing ebay special. I think I posted the wheel specs in the beginning, if not I can check and post them. I think it's similar to how a Garrett GT2871 should spool, minus probably 500-750 RPMs for ebay journal bearing awesomeness.

And taco manifold too, but I did port it a bit to help it flow a little better.

So I'm not against that, but how would I plumb it in?

The front turbo I'm using both ports. Bottom to post-intercooler pipe, top to turbo inlet. Just hook an MBC right to the bottom port? I can't do it on the top port, as that needs to be referenced to the turbo inlet.

Thanks. This went together fairly quickly, and I made a lot of custom stuff for it too. And kind of designed as I went too....

First step is turn up the boost. Then figure out how big of a magnaflow I can fit in the back and order, and decide what I'm going to do for a catalytic converter. And fix any problems that pop up. And figure out a cheap way to MS3 PWM my oil pump with RPM so that it's quiet at low speed/highway cruise.

patsmx5

iTrader: (16)

Thanks man! I can't wait to get it all dialed in.

Here's a pic of the engine bay as of now. Not pretty but will clean it up once everything is dialed in and working correctly.

Leafy

iTrader: (1)

I would plum it into the bottom line and have the exhaust that would normally vent to air vent to the turbo inlet, that should keep your ratio. So you have to use a bleed type, unless you can find a blocking type that has a reference port that you can plum into the turbo inlet.

patsmx5

iTrader: (16)

Also relavent question, what's a used set of ID 1000's worth? Considering buying the 2,000s, but they're like almost 4 figures....

18psi

iTrader: (76)

350

aidandj

iTrader: (5)

I heard they're only worth like $20. I'll be a good guy and give you $40 for em.

I would do the 1700's. They are significantly better injector tech.

stefanst

iTrader: (1)

Slow spool on "small" turbo: It's not seeing as much pressure differential on the turbine as it usually would since the big turbo adds a restriction in the exhaust. So it will spool more slowly.

aidandj

iTrader: (5)

Needs an electric cutout after the first turbo that closes when you hit 4krpm. Low end spool then close it and spool the big one.

Keep it stupid simple

Mobius

iTrader: (2)

Or base the cutout on boost.

stefanst

iTrader: (1)

Using something like a diaphragm => WG actuator?

18psi

iTrader: (76)

You guys are overthinking it.
direct port 100 shot will help the 1st turbo spool.
then fuel injection in the midpipe will help the 2nd turbo spool.

aidandj

iTrader: (5)

English racing mkes something like that. It's just a wastegate cutout

good2go

iTrader: (2)

In for a custom dual injector intake next, for the sake of simplicity (and cost savings).

aidandj

iTrader: (5)

"Savings"

18psi

iTrader: (76)

he shouldn't need injectors until he's well over 400.
But I won't deviate from the "KICS" method

good2go

iTrader: (2)

There! (ninja edit) Happy?

patsmx5

iTrader: (16)

That's true, and might be the main thing. That's part of why I did 3" all the way back too, to help it as much as possible. For sure the small turbo would spool better without the one in the back restricting it.

From a control standpoint this setup is dirt simple. Two turbos, two wastegates. That's it. About to add an air pressure regulator to the rear wastegate's top port so I can adjust the pressure on that one up. Again, dirt simple stuff that just works. No tuning PID, no electronic anything to mess with. Simple and works, I ran this same one on the GT32 setup and it worked perfect, so I expect it to work here too.

Also found a small exhaust leak upstream of the big turbo, missed about 3/8" of welding on a spot, gonna fix that real quick so might spool that guy a bit better....

I'm planning to turn up the boost on the big turbo until I run out of fuel, then figure out how to get more fuel to it.

patsmx5

iTrader: (16)

Then I'm gonna need injectors.