38r boost levels
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Tuned
Joined: Sep 2011
Posts: 399
Likes: 1
From: Ness city Kansas
38r boost levels
people who have a 38R what are you seeing for boost levels i can get 28-29 with my mods but i have really leaky up pipes im am in the process of saving for bellowed but curious what other people are getting ?????
ps i cant remember if i have in my signiture what my chip is... i have the ts and i am baseing the pressure off of my 100 setting not the 140
ps i cant remember if i have in my signiture what my chip is... i have the ts and i am baseing the pressure off of my 100 setting not the 140
Thread Starter
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Tuned
Joined: Sep 2011
Posts: 399
Likes: 1
From: Ness city Kansas
Thread Starter
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Tuned
Joined: Sep 2011
Posts: 399
Likes: 1
From: Ness city Kansas
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Tuners are a personal choice.
The reason I say your levels seem close, is that it takes fuel to turn the turbo, and the stock injectors can only move so much...a custom tuner may be able to gain some performance out of your setup though as the "canned" TS is designed for stock setups.
Another thing to consider is that the boost is only one measurement really, you are moving more CFM of air with the larger turbo so if you are content and egt's are within reason, run it. If you are leaking at the up pipes, you will likely gain some boost and likely a little performance and/or mileage. But I wouldn't expect the 40+psi you would get with larger injectors.
The reason I say your levels seem close, is that it takes fuel to turn the turbo, and the stock injectors can only move so much...a custom tuner may be able to gain some performance out of your setup though as the "canned" TS is designed for stock setups.
Another thing to consider is that the boost is only one measurement really, you are moving more CFM of air with the larger turbo so if you are content and egt's are within reason, run it. If you are leaking at the up pipes, you will likely gain some boost and likely a little performance and/or mileage. But I wouldn't expect the 40+psi you would get with larger injectors.
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Tuned
Joined: Sep 2011
Posts: 399
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From: Ness city Kansas
what are you meaning by larger injectors... like what size and cc larger im not wanting to get over 425hp
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Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Personally a set of AC 160cc with 100% nozzles would and is a great, reliable setup that will net around 350-400ish depending on tuning in my opinion. But those are different questions than what you are asking about your boost levels. I was just trying to clarify your setup to get a more accurate estimate.
Senior User
Joined: Oct 2012
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From: Longview Tx
A class would be great! Seriously I understand that cfm is more important than boost numbers but would love some more education on this subject
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
My boost levels are measured at the turbo, not at the MAP sensor side of the spider. My 38R gets 35 PSI with the red line connected on my stage IIs and a subdued tune. I know the engine is capable of more, but I choose not to push it harder. The 38R is capable of 40 PSI (again, at the turbo)... if everything is in place to push it there. My old stock turbo with stock injectors would give me 30 PSI with the red line disconnected and running an aggressive tune... but everything with exhaust and boost is sealed tight.
Butt-Head
Joined: Apr 2004
Posts: 9,457
Likes: 2,938
From: Reed Point, MT
Sure, but when you find out just how much power you actually AREN'T making because of the ridiculous amounts of drive pressure required to spin the compressor that fast and STILL not get any more airflow through the engine.......
I guess my truck can't be nearly as fast as yours though because I put down just over 400 HP on the exact same injectors you have....but with 22 PSI of boost on a STOCK turbocharger (and like your setup, my pressure sensor is in the "hot" side piping). I MUST have a freak truck since the whole thing is bone stock save for the injectors and the usage of a 1995-1997 muffler. I assure you as well that I have no boost leaks or drive pressure leaks either save for proper wastegate function.
But that's OK. I have sold my 160/100% injectors and will be going with 238/200% in the spring (once the snow goes away); stock turbo, stock high pressure oil pump, stock exhaust, stock intake, and all-stock fuel system. Here's to hoping for a minimum of 475 on an all-stock truck with a new transmission in a few months. I do this because there's not a forum out there that says it can be done. It's always the same ol' story: "You need such-and-such pump to do that." "You have to get XYZ parts and whatnot for "supporting mods"". PFFFFT. Whatever.
I guess if watching pointless needle movement is your thing......
I guess my truck can't be nearly as fast as yours though because I put down just over 400 HP on the exact same injectors you have....but with 22 PSI of boost on a STOCK turbocharger (and like your setup, my pressure sensor is in the "hot" side piping). I MUST have a freak truck since the whole thing is bone stock save for the injectors and the usage of a 1995-1997 muffler. I assure you as well that I have no boost leaks or drive pressure leaks either save for proper wastegate function.
But that's OK. I have sold my 160/100% injectors and will be going with 238/200% in the spring (once the snow goes away); stock turbo, stock high pressure oil pump, stock exhaust, stock intake, and all-stock fuel system. Here's to hoping for a minimum of 475 on an all-stock truck with a new transmission in a few months. I do this because there's not a forum out there that says it can be done. It's always the same ol' story: "You need such-and-such pump to do that." "You have to get XYZ parts and whatnot for "supporting mods"". PFFFFT. Whatever.
Originally Posted by Tugly
Because the permagrin hangs out in the big boost neighborhood... and many like permagrin.
I guess if watching pointless needle movement is your thing......