LB7: Turbo question

coastalDMAX

New member
Aug 6, 2009
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Southport NC
Hi guys i am new to diesel performance and know nothing about tuning just what i read here, first off i have a 03 LB7 with a K&N intake a magna flow 4" down pipe back straight pipe, i just put a Diablo and set it to the 125hp tune and took it out for a test spin and it lagged around 17 psi and after it shifted it built boost to 21 psi do i need a different waste gate or the PPE boost valve or is the tune de-fueling it to make me think its lag? or i was reading about a module that lets you fool the puter and let ya build more boost... any help will be gratefull as i want to smoke a few strokers and dodges runnin around here :)
 

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
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Mid Michigan
Yep, boost valve is a good "bang for the buck" mod for the LB7. It'll wake that Predator tune up. You'll probalby want more out of the truck after a while, and thats when you'll wish you had EFILive and the tuning possibilities it offers.

Then....its only a short trip to a built transmission.


Have fun.
 

coastalDMAX

New member
Aug 6, 2009
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Southport NC
Yea thats what i am thinking myself is the tranny or a turbo...because i drive this thing every day and it has 170k on her now so it probally wont be long, i ordered the PPE boost valve and the PPE overboost code eliminator..
 

coastalDMAX

New member
Aug 6, 2009
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Southport NC
LOL no way will I let her drive ole whitey. I got her a hotrod to drive its a 1998 4 door saturn. LoL and she calls it buger because of the color kinda sea foam green. But hey it has a sunroof and 2 busted speakers hehehe. Just as soon as we get out of here ima give you a call