Twin turbo build

[mike diesel]

The pie cuts won't be much issue but if the inside is not smooth or close to it, you can create hot spots which will weaken the pipe and cause it to crack. Might not notice it that far out on the exhaust but something to think about

I run my flap wheel on the inside to keep them clean.

 

[mike diesel]

Hopefully the weather holds up for some test drives tomorrow.

 

[Burn Down]

Looks good Mike:thumb:

 

[mike diesel]

It is alive.

 

[CaptPhil]

how is it?

 

[mike diesel]

Uploading a video right now. I need to play with the wastegate, I'm not driving the secondary very hard. Making 30 psi from the 88mm. It sounds insane. Oil feed line is leaking tho so I'm messing with that right now.

 

[mike diesel]

Duramax twin turbo 72/88mm: https://youtu.be/feXyfxcFx5Q

 

[CaptPhil]

What is the overall boost? How big a tune?

Looks like it spools very fast.

 

[mike diesel]

Honestly i didn't pay attention to overall boost. The gate is opening at 25psi and dumping it all to the big turbo. I have it set for spring tension right now. I'm going to try to reference the gate from the big turbo boost instead of overall boost. That should drive the secondary as hard as it can.

 

[mike diesel]

That is my 2700us tune on 30% injectors.

 

[CaptPhil]

Nice man, I am still amazed how fast you are getting all this stuff done.

When will it see the track?

 

[56taskforce]

Nice Mike sounds insane.. :thumb: can't wait to see what you get when you get it dialed in..:woott:

 

[mike diesel]

Nice man, I am still amazed how fast you are getting all this stuff done.

When will it see the track?

Track opens last week of this month. I think the 26th.

 

[56taskforce]

Track opens last week of this month. I think the 26th.

Your best guess how do you think it will run, comparing to how it ran before?

 

[mike diesel]

Haha i need to go floor it a few times before I can tell you my guess.

 

[CaptPhil]

Your best guess how do you think it will run, comparing to how it ran before?

Haha i was gonna ask the same thing, but figured it was too soon for him to tell. :hug:

 

[56taskforce]

Haha i was gonna ask the same thing, but figured it was too soon for him to tell. :hug:

As fast as he built it he should have had a guess prepared yesterday :rofl:

 

[CaptPhil]

Alright then Mike, how much faster does it feel with the built motor vs the stock bottom end? I know you turned the fuel up some. What do the logs say???? :woott:

 

[Chevy1925]

Now it's time to start figuring out pressure ratios and how hard you can drive that 72! Sounds wicked though!

 

[Bonestock]

Big air and big fuel!