38r 19 max psi of boost.

[7.3 Cowboy]

My truck has a 38r Garrett on it only making 19 psi of boost. I put new ceramic bellowed up pipes on it a couple weeks ago because before that it would only make 9psi. I double checked all the bolts and clamps they are all tight. I checked all the boots when I did the up pipes none were tore. Could this be wastegate? How can I pressure test for boost leaks?

 

[stroker2]

What mods do you have to start? A stock 7.3 with no chip will max out at around 19 psi...


Any leaks to your boost gauge?

 

[Tncoalroller88]

U def have a boost leak check all your boots . If everything is tight adjust your waste gate .

 

[lincolnlocker]

did you use a boost leak detector and spray the chit out of everything with soapy water?

live life full throttle

 

[Justin@DP-Tuner]

Pressurize the system and check for leaks like stated above. If you are tuned you should be making more than that.

 

[ryanss22]

we need a lil more info about what you have on your truck... like stated a bone stock truck will max out about 19-20 psi

 

[Groomzybanshee]

Also do you have a mechanical gauge or something that plugs in like an edge?

 

[7.3 Cowboy]

Mechanical gauge and it isn't tuned at the moment it was tuned when the pipes where leaking and made 12psi. What do I need to pressurize the system? How would I build a boost tester?

 

[Project20v]

If your wastegate solenoid valve is leaking internally your boost will be low as well. Pull the line off the inlet manifold, cap off the nipple and test drive it.

 

[lincolnlocker]

in other words take the red line off the canister thats on the top back side of the compressor housing and plug it.. most just put it on a inner cooler clamp bolt.. also with no tunes your prolly right where it should be... try the red line thing, put tunes back on it and report back... dieselsite sells a fancy tester.. look at it and maybe duplicate it or build your own style..

live life full throttle

 

[stroker2]

Mechanical gauge and it isn't tuned at the moment it was tuned when the pipes where leaking and made 12psi. What do I need to pressurize the system? How would I build a boost tester?

If its building 19 psi without a chip of any sort then you do not have a problem....

 

[7.3 Cowboy]

I don't have the chip anymore. I will try to unplug the wastegate and see what happens

 

[lincolnlocker]

why not?

live life full throttle

 

[7.3 Cowboy]

I got the case of idiot and sold it to a buddy and he blew his truck up two months later and won't sell it back...

 

[Groomzybanshee]

What "chip" did you have

 

[7.3 Cowboy]

Canned ts 6 position

 

[lincolnlocker]

dam, i guess you did.. ts canned is better then all the tuners... get some custom tunes from one of our vendors.. you'll be happy.. thats if you want... you should be good around 19 psi with a 38r and stock motor. but still should pressurise the system and double check... anytime a intercooler boot comes off it should be done...

live life full throttle

 

[7.3 Cowboy]

It ran pretty good. I think im gonna try the hyrda from php and build me a boost tester tomorrow

 

[TyCorr]

Im surprised it will make that much. On a 6" and 37s with no tuning mine would tickle 15psi. The larger tires place more.load on things and allow boost to build easier.

I would say he's fine.and plus a little. Figure a tuned, stock fueled.truck.will max out at 26-28. 30 if you have a truck that will make 300rwhp in a.race.file. Since a stock superduty with ad's will dyno ~180hp with no chip 13+ psi.seems about right for a non tuned ride and a 38r. Remember how pathetic an untuned stock truck is.

 

[lincolnlocker]

when my truck was bone stock with a tune if would hit 34psi some what easy... but i guess it was never within normal ranges as everyone has stated..

live life full throttle