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post #1 of 25 (permalink) Old 01-31-2012, 06:29 AM Thread Starter
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power increase from gtp38r

Been reading about the gtp38r and some places are saying a 80 gain with a chip and exhaust from just a turbo upgrade i find that kinda hard to believe i can understand 25hp or so is there any truth to what they say ?

im planning on picking up a stage 3 snow system in the next few days and maybe a 38r before i do my injectors

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post #2 of 25 (permalink) Old 01-31-2012, 11:26 AM
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Re: power increase from gtp38r

Who is "they"? I've really never heard anyone say that there would be an 80hp gain from just a turbo swap on an otherwise mostly stock truck.

And no, you won't see much, if any, of a power increase. You'll get lower EGT's, possibly a teeny bit of boost, but that's about it.

By the way, I did directly compare the power output from a stock turbo vs. a 38R with stock injectors and a chip. Prior to the turbo swap, I ran my truck at Bandimere, making many many passes down the 1/4 mile. After the turbo swap, I went back to Bandimere, making many many more passes.

The result: There was zero difference in times and trap speeds.

However, EGT's were about 100 degrees cooler with the 38R.

So..... there you have it.

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post #3 of 25 (permalink) Old 01-31-2012, 12:36 PM
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Re: power increase from gtp38r

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Originally Posted by Pocket View Post
Who is "they"? I've really never heard anyone say that there would be an 80hp gain from just a turbo swap on an otherwise mostly stock truck.

And no, you won't see much, if any, of a power increase. You'll get lower EGT's, possibly a teeny bit of boost, but that's about it.

By the way, I did directly compare the power output from a stock turbo vs. a 38R with stock injectors and a chip. Prior to the turbo swap, I ran my truck at Bandimere, making many many passes down the 1/4 mile. After the turbo swap, I went back to Bandimere, making many many more passes.

The result: There was zero difference in times and trap speeds.

However, EGT's were about 100 degrees cooler with the 38R.

So..... there you have it.


Great info

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post #4 of 25 (permalink) Old 01-31-2012, 12:45 PM
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Re: power increase from gtp38r

Largest claim I have seen was 16 hp.
Which you will have a hard time feeling.
Now spool, surge, temp diff you can see.


Now if you had large injectors, and did a turbo swap, maybe.
But basic mods only no great diff.

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post #5 of 25 (permalink) Old 01-31-2012, 01:30 PM
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Re: power increase from gtp38r

I went from 320hp to 351 hp on the dyno. But that was different dyno's, thousands of miles apart.

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post #6 of 25 (permalink) Old 01-31-2012, 02:16 PM Thread Starter
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Re: power increase from gtp38r

ok thats great to know if i can gain some better spooling charictaristics and better street manners and if i only get minimal gains im a happy camper i would imagine that a 38r swap and water/meth injection would make my truck run very well untill i get the injectors

02 ecsb afe stg2, wicked wheel, afe bladerunner intake, 4in turbo back mbrp, bully dog shift improver, DI fpr, innovative tunes, stock injectors and turbo (for now)
smoked cab lights, led tails smoked 3rd brake, smoked halo fogs, smoke headlights w led turns 285/75/16 goodyear mt-r`s

heavy metal performance rockdale ill 815-725-8044
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post #7 of 25 (permalink) Old 01-31-2012, 02:25 PM
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Re: power increase from gtp38r

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Originally Posted by Boogeyman View Post
Been reading about the gtp38r and some places are saying a 80 gain with a chip and exhaust from just a turbo upgrade i find that kinda hard to believe i can understand 25hp or so is there any truth to what they say ?

im planning on picking up a stage 3 snow system in the next few days and maybe a 38r before i do my injectors
What, exactly, are you reading? If you add a chip, exhaust, and a 38r turbo, to a stock truck, you can gain 80 HP.

If only those who knew what they were talking about replied, this thread would still be on page one.
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post #8 of 25 (permalink) Old 01-31-2012, 04:24 PM
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Re: power increase from gtp38r

I dynoed a 30 hp increase with no other changes when I went from a stock turbo to the 38r.
Truck had intake, exhaust, and six position chip.

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post #9 of 25 (permalink) Old 01-31-2012, 05:22 PM Thread Starter
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Re: power increase from gtp38r

searching gtp38r on ebay they say 80 gains with a chip and exhaust
i already have tunes and i know i have more than 80hp over stock already. i was just wondering what over what it is now would/should i gain from just the swap
im just looking at it from a egt/boost response standpoint mostly since i plan on doing some pulling with it and street fooling around if i happen to gain 20 -30 hp great

02 ecsb afe stg2, wicked wheel, afe bladerunner intake, 4in turbo back mbrp, bully dog shift improver, DI fpr, innovative tunes, stock injectors and turbo (for now)
smoked cab lights, led tails smoked 3rd brake, smoked halo fogs, smoke headlights w led turns 285/75/16 goodyear mt-r`s

heavy metal performance rockdale ill 815-725-8044
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post #10 of 25 (permalink) Old 01-31-2012, 08:54 PM
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Re: power increase from gtp38r

Quote:
Originally Posted by Boogeyman View Post
ok thats great to know if i can gain some better spooling charictaristics and better street manners and if i only get minimal gains im a happy camper i would imagine that a 38r swap and water/meth injection would make my truck run very well untill i get the injectors
The spool up is right now vs. the stock turbo.

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