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Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

Anyone here ever tryd it? Iv done it and noticed a small improvement. anything else that will make it even more noticable?... JOIN NOW TO REMOVE TRACER

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  #1  
Old 07-16-2009, 12:13 PM
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Anyone here ever tryd it?
Iv done it and noticed a small improvement.
anything else that will make it even more noticable?
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  #2  
Old 07-16-2009, 10:34 PM
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I think you'll notice when your turbo goes boom

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  #3  
Old 07-16-2009, 11:24 PM
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makes drive pressure go up, it does hit higher boost but pressure ratio will be off and drive pressure will only get higher with tuning and turbo will go eventually from over spinning

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  #4  
Old 07-20-2009, 01:21 AM
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Yep. 40psi max. Stock turbo most efficient power at 28-30psi. Anything over 30 and your out of the compressor map.

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Old 07-20-2009, 10:49 AM
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So is this something not worth noticing the diffrences?
Should I unplug the Line?
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  #6  
Old 07-20-2009, 10:42 PM
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Originally Posted by scramHD View Post
Yep. 40psi max. Stock turbo most efficient power at 28-30psi. Anything over 30 and your out of the compressor map.

any stock duramax turbo wont last very long at 40psi. the lb7 turbo falls off the map at 32psi and anything beyond that its very unefficient
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  #7  
Old 07-20-2009, 10:44 PM
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Originally Posted by DuramaxDiesel02 View Post
So is this something not worth noticing the diffrences?
Should I unplug the Line?

no leave it as it is
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Old 07-23-2009, 08:52 AM
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Originally Posted by 2500HeavyDuty View Post
no leave it as it is
So I should return it the way it was normally?(Gate not Blocked)
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  #9  
Old 07-23-2009, 05:56 PM
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yes
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  #10  
Old 08-05-2009, 11:21 PM
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Originally Posted by 2500HeavyDuty View Post
any stock duramax turbo wont last very long at 40psi. the lb7 turbo falls off the map at 32psi and anything beyond that its very unefficient
There are several trucks out there running non wastegated turbos. It can be done. Its all in the tuning. You wont make any more power at 38 than 32. 32 is just a number you read. Each truck is different. Mine maxes at 30psi, as my tuning will prove it. Others max at 28, some at 33. Some stock turbos wont make more than 500-520hp. While others support 570-595hp. This has been proven.
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