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Sep 10, 2014 | 01:56 AM

Blue7.3

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From: Australia

Boost Numbers

Has anyone with a 38R pulled the red line off and plugged the tube and blanked the actuator to gain more boost?
What actuator are you running?
What boost figures are you seeing?

Sep 10, 2014 | 06:26 AM

Aussie BrianB

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From: Adelaide

Doesn't this
http://www.dieselsite.com/19995-2003...ontroller.aspx
sound like a better idea?

Sep 10, 2014 | 11:08 PM

Blue7.3

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From: Australia

Have one on the way Brian , but still mechanical and you don't use the red line with that .
Just interested in what others have as far as boost #.

Sep 11, 2014 | 04:41 AM

ChunderDownUnder

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From: Man Cave

stock wastegate that was set when I got it. red line off and I get 38lbs. anything over 33-35 is a waste tho

Sep 11, 2014 | 05:41 AM

Aussie BrianB

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From: Adelaide

Quote:

Originally Posted by ChunderDownUnder

stock wastegate that was set when I got it. red line off and I get 38lbs. anything over 33-35 is a waste tho

Just out of curiosity, what is the maximum boost pressure you
can "safely" use without doing major internal engine upgrades
like stronger conrods etc?

I realise that you would need to upsize injectors, HPOP, intercooler
etc to make use of more boost.

Just wondering how far you can push the standard motor without
breaking things.

Sep 11, 2014 | 11:13 AM

BigF350

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Joined: May 2004

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From: Melbourne, Aus

Quote:

Originally Posted by ChunderDownUnder

stock wastegate that was set when I got it. red line off and I get 38lbs. anything over 33-35 is a waste tho

Yeah, unless you can get fuel to support the increased air, you are just increasing your intake temp, and increasing exhaust pressure (i.e. making less power).

I wound my 6.7 back from 35psi to 28 (very light haze from exhaust under boost), but its electronically actuated.

Sep 20, 2014 | 12:42 AM

ChunderDownUnder

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Joined: Apr 2009

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From: Man Cave

Quote:

Originally Posted by Aussie BrianB

well thats a hard one. your stock turbo or a 38R with stock sticks wont hurt anything. Back pressure is the issue that you need to watch as well as cylinder pressure. the later will be a concern with heavily modded engines.
The block itself can handle up to around 90 psi. If you run consistent 35-40's then updated valve springs are in order. Then it goes on. Head gaskets, fire rings. Our PMR connecting rods are fairly safe around the 400hp mark, but there is no guarantee. To get that u need more than a 38R tho.