So I got a set of twins I have them installed... But I wanna make sure I have them set up right. Cuz I ve been told multiple different ways So I got my small turbo on top and big turbo on the bottom the exhaust hooks up the big turbo. How is the piping supposed to be for compounds? Do I hook intercooler pipe to small? And I am just confused I added the best photo I have

 

Exhaust from engine manifold enters small (secondary) charger first, then to the larger turbo (primary). Fresh air is pulled through the primary, compressed into the secondary, further compressed by the secondary into your intercooler setup.

Also, hard to tell by the picture but make sure your oil drain is as close to "6" o'clock as possible. As in, not sideways. This applies to both chargers.

 

What happens if there not at six o clock?

 

And I am boosting 40lbs... I have that dump valve all the way closed. I did forget to put the Gasket in between the to turbos... Could it be leaking out of there and not allowing it get full boost?

 

If the oil drain is not at the bottom, 6 o'clock, the oil will not drain properly.

 

How can tell if not draining properly? They looked to be at six o clock

 

If the oil drain is at the bottom, it will drain well.
If it is on the side , say 3 or 9 o'clock say, it will not drain as well.

 

Okay if forgot the gasket in between the two turbo would there be an boost leak?

 

Very possible...what is your setup? Type of turbos and fueling, what year truck maybe, 12v/24v...
What type of air filter are you running?
Have you checked drive pressure?
You probably want your wastegate to start opening around 30psi, assuming it bypasses exhaust around your secondary into the hot pipe.

 

24v It's an hx40 milled to a 62. The big turbo is a s475. 6x18 injectors. Hot rod vp 44. Stage 3 cam fass 220. Tst comp box stacked with ts mvp. Just afe air filter that needs to be cleaned. And how do I check drive pressure? And the waste gate is weird t looks like it been welded into the exhaust housing on the small turbo. I was going to actuall cut it off and patch it. Cuz who ever welded it did Edit weld so it leaks that I noticed today. Idk where I would hook that waste gate up to l. It's weird.

 

Drive pressure...drill and tap exhaust manifold just like for pyro, then run a few feet of steel/copper line before you hit a pressure gauge. 1:1 ratio is the goal so I read.

Not a bad idea to test pressure between turbos to see what is doing all the work also.

You definitely will need a wastegate, secondary housing will not flow any more just because there is another turbo down stream. Most efficient way is to dump the gated exhaust into the hot pipe, feeding your large charger, you don't want it heading to atmosphere or exhaust pipe (waste.)

Sounds like you have enough fuel, experiment with the wastegate with shop air, try to get it to open around 25-30 psi and see what happens. Definitely don't want any leaks either...

 

Okay for the waste gate to open where do I hook the waste gate up to? I ve been told I need to tap into the intake side of the turbo. Which I don't want to do so i was wondering if I could hook it to my intake horn? I know there less boost there then at intake side of turbo

 

Either is fine, within a few psi of each other.