Stock turbo efficiency..?

DRAT,  you mentioned DA earlier.  huh .. yeah i am stumped a bit too.  18 pounds is totally doable unless you are on different turbos..  I seem to recall at least one previous member running 20 which i thought was insane ..
 
So everything is perfect and the only thing you "think" is good is the turbos because they only have 31k miles on them. Sounds like you already found the solution just not willing to swap them. Turbos internally could have some drag not allowing them to spin as freely so while visually they look and feel perfect doesn't mean they are.
 
In 3rd gear mine goes up to 18 and tapers down to about 14.5, in 4th gear it holds 18 thru most of the rpms but towards the end tapers down to 16.

Attached picture is what 4th gear looks like.

 
TopherSho said:
I wonder if the people running full custom hot-pipes hold pressure longer/better?
Click to expand...
I only upgraded my hot pipes when I went upgraded turbos other than the noisemaker delete
 
Jordan said:
So everything is perfect and the only thing you "think" is good is the turbos because they only have 31k miles on them. Sounds like you already found the solution just not willing to swap them. Turbos internally could have some drag not allowing them to spin as freely so while visually they look and feel perfect doesn't mean they are.
Click to expand...

maybe you are correct, I wanted to get everything else checked out before making this kind of investment and to measure it's necessary, right?
Now, I keep seeing often this same issue come up, that's why I brought this up.

 
SuperPete said:
Jordan said:
So everything is perfect and the only thing you "think" is good is the turbos because they only have 31k miles on them. Sounds like you already found the solution just not willing to swap them. Turbos internally could have some drag not allowing them to spin as freely so while visually they look and feel perfect doesn't mean they are.
Click to expand...

maybe you are correct, I wanted to get everything else checked out before making this kind of investment and to measure it's necessary, right?
Now, I keep seeing often this same issue come up, that's why I brought this up.
Click to expand...

Need the right buddy to get it done on warranty ;)
 
Jordan said:
So everything is perfect and the only thing you "think" is good is the turbos because they only have 31k miles on them. Sounds like you already found the solution just not willing to swap them. Turbos internally could have some drag not allowing them to spin as freely so while visually they look and feel perfect doesn't mean they are.
Click to expand...

I am almost 100% my turbos are tired. Car made 391/470 E30 tune and K&N drop in only.  I actually lost some boost across the board when I installed the GH IC however my car made the same power.  Less boost more efficiency. 

I checked my BOVs, added DP's and a better exhaust.  Even then boost recovery was minimal.  However with the full exhaust HP didnt move but TQ did rise from 470 to 494. Added the noisemaker delete pipe and still have not recovered boost.  Will log to confirm.
 
Well, larger IC takes longer to build up pressure and harder for tiny turbos to keep pressure up,
Who knows, I been braking my head soo much these 2 weeks, I had nightmares about it.
Anyway, at some point I will upgrade turbos, just not now.
 
SuperPete said:
Well, larger IC takes longer to build up pressure and harder for tiny turbos to keep pressure up,
Who knows, I been braking my head soo much these 2 weeks, I had nightmares about it.
Anyway, at some point I will upgrade turbos, just not now.
Click to expand...

I have too.  However, I am happy with my SHO as it sits.  It makes good power and I have 100% faith that I can drive cross country in it and arrive safely.  I just cannot justify at this time spending another $4500 to make my SHO a 500/600 car and put it in the extreme zone for trans failure.  The $4500 could be spent for a big fuel system and cams for new my project.  High 3 digit and low 4 digit power is very reasonable for that set up. 
 
Welp... I was doing some pulls trying to get to the bottom of this as well and lo and behold I put a hole in my block. 💥 Was it worth it... Idk. Should have I been happy with 12.2... Maybe. Something special about the 11 second club to me tho... I thought the car had what it needed to get there... Apparently I thought wrong. Don't feel bad for me. I knew the risk of pushing things to the limits. I really don't know what went wrong at this point though.
 
I'm in the process of returning to stock. Technically I'm still under Lincolns 70k mile drivetrain warranty. It was also a certified used car... So hopefully they take care of it. My only concern is the flash count if they decide to look.
 
StinkinLinkin13 said:
I'm in the process of returning to stock. Technically I'm still under Lincolns 70k mile drivetrain warranty. It was also a certified used car... So hopefully they take care of it. My only concern is the flash count if they decide to look.
Click to expand...

Not what you want to hear but pretty sure 500 key cycles gets rid of that..
 
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