Turbo Efficiency Maps
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Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Turbo Efficiency Maps
Here is a Earnesteugene type post minus the math as I must have thrown out the formula/worksheet from this crap pile I call my workstation.
Anyway, while considering turbos I took the liberty of using the calculators on the Garrett site to plug some desired HP #s into units I was considering that had an efficiency map available.
This is using the displacement of the 7.3 with a stock IC (2psi drop) and factor of 1 psi for air restriction. As you can see the H2E has a huge potential for power but without a BB center so must make it lower. Not sure how high it can survive but it appears to be loafing at 500hp in our application.
This is just food for thought and you can see where I erred on my initial calculations on the GTP plot. If they don't line up, your math is wrong. Draw a line for your desired HP level.
Anyway, while considering turbos I took the liberty of using the calculators on the Garrett site to plug some desired HP #s into units I was considering that had an efficiency map available.
This is using the displacement of the 7.3 with a stock IC (2psi drop) and factor of 1 psi for air restriction. As you can see the H2E has a huge potential for power but without a BB center so must make it lower. Not sure how high it can survive but it appears to be loafing at 500hp in our application.
This is just food for thought and you can see where I erred on my initial calculations on the GTP plot. If they don't line up, your math is wrong. Draw a line for your desired HP level.
Thread Starter
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Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Well before this fades away into oblivion, I just wanted to say why I posted this. If you are considering a turbo upgrade, you really ought to do the math to know what you are buying. Any model that does not provide a efficiency map will leave you guessing. Yes, I know there is the tried and true WW and/or the ATS but if you are ready to spend 4 digit cash, do your homework.
That is all. To infinity and beyond, and on to oblivion.
That is all. To infinity and beyond, and on to oblivion.
Thread Starter
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Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by strokin_it7.3
Wow a bad injector, couldn't swamps find that out from the shop before they even sent them out if they were bench tested? 
Hope you fare better. I just know I will be smokin the tires real soon. Heck, I can smoke em now as it is.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Originally Posted by Tenn01PSD350
Here is a Earnesteugene type post minus the math as I must have thrown out the formula/worksheet from this crap pile I call my workstation.
Anyway, while considering turbos I took the liberty of using the calculators on the Garrett site to plug some desired HP #s into units I was considering that had an efficiency map available.
This is using the displacement of the 7.3 with a stock IC (2psi drop) and factor of 1 psi for air restriction. As you can see the H2E has a huge potential for power but without a BB center so must make it lower. Not sure how high it can survive but it appears to be loafing at 500hp in our application.
This is just food for thought and you can see where I erred on my initial calculations on the GTP plot. If they don't line up, your math is wrong. Draw a line for your desired HP level.
Anyway, while considering turbos I took the liberty of using the calculators on the Garrett site to plug some desired HP #s into units I was considering that had an efficiency map available.
This is using the displacement of the 7.3 with a stock IC (2psi drop) and factor of 1 psi for air restriction. As you can see the H2E has a huge potential for power but without a BB center so must make it lower. Not sure how high it can survive but it appears to be loafing at 500hp in our application.
This is just food for thought and you can see where I erred on my initial calculations on the GTP plot. If they don't line up, your math is wrong. Draw a line for your desired HP level.
