Engine/Transmission (1998.5 - 2002) Stock Turbo Boost Pressures

[MBailey]

I've got a question for all you seasoned veterans out there. Being a newcomer to all of this, I need to find some answers on the boost pressures for a stock turbo. My truck is a 2002 3500, 5 spd. , 4:10, 4X4.

I just installed pryo and boost guages on my truck last week. I'm getting a reading of about 4lbs of boost at 55 mph unloaded, and 8 lbs of boost at 65 mph. Max boost pressure is 18 lbs at WOT. Is this normal?

I've got a EZ in the mail as we speak, and also a 4" exhaust system on order, but I don't want to install them yet if there is any problems with the turbo that DC can take care of, 65,000 still on the warranty, ya know what I mean! Any help would be appreciated.

 

[fyrescott]

Sounds like your boost pressures are right in the ball park. With the EZ and boost fooler you will see pressures around 30ish WOT.

 

[Dkevdog]

Stock truck can't produce more than about 21psi without setting a code. Your numbers sound about right. You will see the truck put our more boost at WOT under a load than you will empty, so you might see 20/21 with a trailer behind you. With the EZ and the boost elbow you'll see as much as about 28/30. I have 275's and EZ and have hit 36. The nice thing about the EZ is all you have to do is unplug and remove it for warranty work.



Kev