I agree. Chris from E.D really thinks it's my top turbo. He says the motor is air locked on both sides and the compounds are working against each other. Could a boost leak really have that much affect. I think o need chris to make me the right top turbo. But I was confused on how the other guys set up is working for him. I shouldn't say my egts are not high up top. I've never accually pushed my truck to wot. I let off at about 3/4 because I'm pushing 80psi of boost. That's why i never dynoed it because I won't be able to push it without blowing the head gasket. I don't even care about performance now. I just want low cruising egts and be able to tow and not worry about staring at my gauges anymore

 

 

Pre-turbo Exhaust leaks can also cause super heated EGT's

 

80lbs at 3/4 throttle That's too much!!! Is that reading from the intake manifold? Do you have a drive pressure gauge?

Where do you have that top turbo wastegated??? If it's set too high, it will create a lot of back pressure plus, it won't let the lower turbo spool the way it should. This could also give you the illusion of quick spooling, but since the air is mostly coming from the top turbo, it would be hot air and lead to high egts. And, the lower turbo would really be straining to feed it until it spools good. In essence, the two turbos would be fighting each other for air. Make sure the top one is 30psi or less, 26 -28 would probably be better, you really want that lower turbo to spool ASAP.

 

No doubt, I didnt even see that. I bet the drive pressures are through the roof. If your worried about your headgasket your not doing much to prevent a failure. your system if obviously not running efficiently. You can make 800RWHP on 50lbs of boost or less with a correctly working system. At this point your just generating hot air like an air compressor. Way out of the turbo map.

 

That's why I think I need a new top turbo, so everythingflows right and it's working efficiently. The top turbo is wastegated at around 25psi. What do you guys suggest doing. How would I check for pre turbo exhaust leaks? I'm Gunna check boost leaks and valve lash and such

 

You'll see black around the manifold (basicly anywhere before the turbo that it's leaking will be black)
I would think that the top charger has a problem or there's a piping problem. I would doubt you could reach 80lbs with a pre turbo leak or boost leak.
At this point I'm with everyone else, It's a charger issue. Sorry but I didnt read what chargers you were running or where you got them. It seems like you might have a mechanical restriction (housing or wheel sizes)

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Duh have you checked your timing?

 

I checked it and set it to 18, but when I bought my truck it was stock. And when o initially checked timing it told me it was at 16. And I know I did it right I have the kit and everything. Many I should break the gear loose and advance it a tad. I think Ita a charger Problem. I was running a hx35/40 hybrid with awesome results. Only thing I changed was I put on an hx40 and remade the hot pipe. And te hotpipes alot better made than my first one so im ruling that out. I think it's the 40 Maby I got a leman or something. I'm Gunna do the free simple things before I buy a turbo

 

The free ones are always good to check first

 

As long as you are close, I don't think a couple of degrees of timing either way will make a huge difference in egts.

How come you switched from the hybrid, I thought they were better than the 40s? If all of the problems started with the switch, then I wouldn't spend much time checking out other stuff until you rule out that turbo. Pull it off and take a good look at it, it really sounds like a bad exhaust housing casting. It might just be something you can clean up with a Dremel. I'm running one of the D-techs as my top turbo. It didn't have the best exhaust housing casting, and it was kinda restrictive to begin with. But after porting the turbo flange, exhaust manifold and wastegate, it works great!

I'm still kinda amazed that you can get 80psi with your setup and problems. Are you sure you're wastegated at 25psi, to me your symptoms sound exactly like a wastegate issue. Mabe something is binding under load???? Maybe it needs a little porting???