Boost increase

[thirstyram]

Anyone know the best way to increase boost? I bought a turboxs adjustable high performance boost controller. I dialed it in to about 30psi, but the problem is now I don't have any or very little boost when I'm cruising. Before this I had installed a fuel plate that came with an elbow with a very small orofice. With that I get about 5 psi while cruising. What should I have? Any help would be appreciated, Justin

 

[kas83]

Less boost at cruise means the motor is barely working, and you'll get better economy. Are you sure you have no boost leaks now?

 

[thirstyram]

Boost leaks

I don't think I have any boost leaks now. all the rubber looks good and I tightened up all the clamps.

 

[058hammer]

Check the inter cooler boots to make sure they are not leaking.

 

[058hammer]

Updated sig.

 

[LostSoul]

I installed an adjustable waste gate and have it set for 30PSI and it will actually hit 34PSI peak. I am still hitting 5-7PSI cruising depending on grade.

 

[thirstyram]

Thanks for your help everyone. I just put in a set of 75hp DDP injectors and my max boost went from 25 to almost 35;

 

[Big AL]

Hey Thirsty...I have the same truck as you and also have done a few of the things you have...do the upgraded injectors make a big diff and do you loose mpg...Tnx

 

[argve]

MPG should not go down unless you start using the new found power then it will drop like a rock but then again the truck is accelerating like a rocket. I had a P-pumped cummins with a #10 fuel plate, AFC kit, 370 injectors, massaged Turbo, high flow exhaust man, straight pipped, bhaf, 191 delivery valves, timing advanced to 16.3 degrees, strapped to a NV4500 with SBC CONO Clutch and she turned 22mpg on a daily basis and that was with me at least 2-4 times a day rolling coal from a stop light just for funs and giggles. When I would get her out on the highway and NOT roll the smoke she did turn 24mpg (but that only happened a few times because I liked the power and the feeling of being held in my seat). But when I went and played with her hard I could run the mileage down to 8-10 mpg when showing off what she could do.... so by upgrading the power output you actually increase the mileage but YOU CAN"T USE THE POWER!