boost and back pressure ?

pooter · Mar 20, 2014

so I just got my truck back from getting a new short block from the ford dealer . I had the tech install rcd egr delete 6.0 manis dark horse up pipes Midwest diesel stage 2 ported intake and a rcd 72 mm atmo . My question is on the stock setting of the performance tune of my mini max the boost is 32psi and my backpressure is 72 psi and my big tune my boost is 45psi and my backpressure is 72psi. Does my back pressure seem to high? I also have a sb cai on the truck to and it still has the stock cold side pipe also

Stroked777 · Mar 20, 2014

That is way to high. I think stock you don't really wanna see 60+Psi

Dzchey21 · Mar 20, 2014

sounds like your back pressure sensor is maxed out.

pooter · Mar 20, 2014

would the sb cai restrict the turbo so it couldn't breath?

Stroked777 · Mar 20, 2014

That has nothing to do with ebp. See if your vanes are stuck

pooter · Mar 21, 2014

so my vgt actuator is moving freely any other ideas maybe a bad ebp sensor it also is showing 4 psi of back pressure at idle

Stroked777 · Mar 21, 2014

That's about normal. What's the gauges reading key on engine off

pooter · Mar 21, 2014

0 boost 0 ebp

sootie · Mar 21, 2014

72 psi is maxing out the stock sensor so it may in fact be more than that. not good for stock valvetrain components.

best thing to do would be to add a wastegate. mine is connected to the drivers side egr cooler port on the uppipe.

Fordtrucks · Mar 21, 2014

Ide clean the ebp sensor and tube.. Also, with a72, you need more air. Look at the AFE stage 2 from elite with the elite upgrade elbow. You'll be surprised!

sootie · Mar 21, 2014

go with No Limit cold air intake and cold side boost tube. pm bigrpowr on here. nothing touches that intake performance wise. it wont help the high backpressure but it will bring egts down and give better spoolup

pooter · Mar 21, 2014

would a 72 make my ebp that high even though im not running the bigger tunes?

Fordtrucks · Mar 21, 2014

No, somethings wrong.

pooter · Mar 21, 2014

ok I will start by cleaning the ebp tube and go from there, thanks for the help guys

sootie · Mar 21, 2014

pooter said:
would a 72 make my ebp that high even though im not running the bigger tunes?

i saw ebp that high with stock turbos on H&S canned tunes and the 72 would make it worse but only marginally (like 3-5psi)

either upgrade the valvetrain or gate it.

What tunes are you running?

pooter · Mar 21, 2014

hs canned tunes im going to get gearheads soon

sootie · Mar 21, 2014

pooter said:
hs canned tunes im going to get gearheads soon

great idea. dont even hesitate.

pooter · Mar 21, 2014

cleaned my ebp tube and sensor no change does anyone have any ideas

sootie · Mar 21, 2014

what other ideas do you want? get custom tunes to optimize the mods you have (it may also help the issue) and gate it.

toss the s&b and go with a no limit for economy and power.

on edit: you dont have the dpf still on do you? LOL

pooter · Mar 21, 2014

no on the dpf I spoke to the tech today he used the ebp sensor that was on the 6.0 mani I changed it out with the 6.4 sensor and all is good now my ebp wont hardly get up to the 50psi range I don't know if the 6.0 sensor was bad or they are different but everything is fine now I will be getting no limits intake and cold side pipe soon also with custom tunes from gearhead