i kinda new to the hole diesel tuning. i have a 96 12v cummins and im tryin to figure out how to turn the pump pressure up. i have already changed the fule plate and slide it all the way forward but im still looking for more power. thanks to anyone that can help me.

 

by pump press what do you mean injection press? fuel press?

 

Need more info on your truck Dan - do you have guages? Do you have anything done to your tranny?

Any other mods? What fuel plate do you have in there?

 

ok i have #100 fuel plate i dont have any gauges yet and the tranny is a stock 5 speed and it has a modified stock air box for the time being.

i would like to do injection and fuel press.

 

oh boy, a #100 plate full forward - with NO guages??? You are asking for a melted piston(s) buddy.

I would put the stock plate back in until you get a pyrometer and boost guage. Doing anything else is foolish.



Guages, high flow air filter, 4" or 5" exhaust and some tranny work is the starting point. (in that order)

 

ok thanks i dont want to mess my truck up. ya i wasnt really sure what to do but im goin to pick up pyrometer and boost gauge tomarrow.

 

ok after you do what the doc said to raise fuel press you either get an aftermarket fuel pump or stretch the overflow spring.

for more injection press I would assume more rack travel would be the answer for that one

 

Now, stretching the overflow spring - by stretching, we are talking about 1/8". If you are going to do that you should probably have a FP guage.

I stretched mine 1/8" and the pump started ticking.

 

wheres the overflow spring located at.

sorry guys these are prolly some dumb questions