What year engines and what transmissions? How is valve lash set?

If your issues started with the turbo, then it's likely the turbo.

How do the trucks perform? Is it the same? Do they both spool the same?

If it's not the gauge, would it be possible for you to use his turbo to test with?

:lol: TAKE IT TO A SHOP....back yard techs make the rest of our lives that much harder.

I think I should Definatly check valve lash. But do you really think it would raise 300* going down the road? My brother might let me use his pyro next week to try it. Chris at engineered diesel thinks my turbos are working against each other. They spool up rather quick.truck has crazy power and egts are not crazy up top. It's just high cruising down the road and barly accelerating. If I go up a small grade unloaded I can push 1200 easy. It would be impossible to pull a trailer.:choochoo:

what does he have thats different than you have?

He has 373s with a 38 inch tire.
I have 410s with a 37 inch tire.
Not so much compared to him, there high on my truck.
You think I should try different pyro, valve lash, and pump tuning before I get a new top turbo from E.D

Try the little things first.

i agree pyros are cheap

Cheaper than a turbo haha. I'll check boost leaks pyro valve lash and pump tuning.:w2:

If your egts are high down low, but aren't on the top end, that would seem to take your pyro out of the picture.:humm:

It still sounds like there's something funky with your turbo. Have you considered that there could be something wrong with the exhaust housing? Could be a bad casting partially obstructing the flow or something like that. Before I mount anything on my truck, I always take it apart and inspect it. The casting on my current top turbo had soo much slag around the wastegate openings, that the openings were only about 3/8". I also just had some very popular injectors that had orifices that varied by almost a 100%. It would have been very ugly if I had put them in my engine.

Just remember, not all identical parts are created equal:nope: