I do alot of pulling and was wanting to know how to get more HP out of this 6.5. I have a 93 gmc 3500 converted to flat bed,single axle 4 x 4, 5 speed. Seem to lose power on hills. Any suggestions?

 

Turn the pump up, put marine injectors in it. If you do that I would suggest putting water injection on it. Then put an exhaust temp gauge on it... That's a must!

 

marine injectors wont do much but turn the fuel screw but you need to up the boost a little bit and make your getting fuel to the ip

 

X2

 

I have heard about turning pump up, but not sure how to do it. Also, was told , I would need to get more air into it. Then would need bigger exhaust. What is water injection?

 

exhaust is a must, water meth works well too ive heard. turning the pump isnt too bad a few guys on here have detailed instructions on how to do it. and making an intake isnt too hard, a 3 inch 180 degree bend exhaust pipe will work, making one now. pulling the vacuum pump and making a manual boost controller helps, and a heath or walking j tune will really wake her up. i can walk 350 gas trucks all day. and i have 4 by

 

Could a person get their stock injectors remanned to 2100 psi?

 

yeah it takes a few shims. got to get them pop tested though to make sure the nozzles are good first