What is normal back pressure numbers?

Bignbadbelair · Jul 6, 2014

Hey guys what is normal back pressure numbers on your trucks? I am getting 500psi also what units so you guys use to measure your back pressure?

Spatel23 · Jul 6, 2014

Ummmm........you must mean 500kpa not 500 psi

500 kpa works out to about 72ish psi iirc

I assume you are monitoring with an SCT ?

Bignbadbelair · Jul 6, 2014

Ok it may be on kpa cause idk why but even in my boost whenever u put in psi it reads kpa readings and kpa readings is psi readings idk why but they are reversed.

Bignbadbelair · Jul 6, 2014

But yes it's sct

Bignbadbelair · Jul 7, 2014

Got it changed to the right settings and I'll monitor my back pressure tomorrow and see where it's at. What's safe back pressure on these trucks?

Dzchey21 · Jul 7, 2014

Shouldn't go more than 75

Morgan@Midwest Diesel & Auto · Jul 7, 2014

On a minimax it does not read past 72. Or not at least on the newest firmware version. Which would be around 86-87 absolute which is where the sensor maxes out.

Dan2427 · Jul 9, 2014

If it maxes out at 72 what would be the problems to look for? Up pipes? Bad turbo/turbos? Sorry just trying to learn all I can since I'm still in market for a 6.4 and my dad had a 6.4 as well.

Poglife · Jul 9, 2014

I'm gonna try custom tunes from gearhead I max my sensor out with my spartan and h&s with canned tunes

sootie · Jul 10, 2014

Dan2427 said:
If it maxes out at 72 what would be the problems to look for? Up pipes? Bad turbo/turbos? Sorry just trying to learn all I can since I'm still in market for a 6.4 and my dad had a 6.4 as well.

run a smaller tune.

getting custom tunes is a good start-then add a gate.