only boosting 5 lbs please help - SRT Forums

LmSRT4 · 10-31-2009, 04:03 PM

ok so I used realtune's diagram for the vacuum lines the one for the rice plate and I zip tied all the lines but when I go to boost I only get 5 - 7 psi I checked my intercooler pipes and they are all tight idk what to check next any advise is helpful thanks guys

LmSRT4 · 10-31-2009, 05:19 PM

by the way my car is an 04 with a mopar stage 2 wastegate with the mopar rice plate i just got my car put back together cuz i had to replace the rod bearings and it ran fine boosting 18 lbs but now its not...i tried to search for a similar case on the threads but i couldn't find anything close

stowaway · 10-31-2009, 08:32 PM

you ocan only do the vacuum line reroute if you have a non-mopar wga. Since you do have a mopar one the most you can boost is the spring rate in thet wga which I believe is 7psi for the s2 wga. You need to be on pcm controlled boost with a mopar wga if you're expecting decent boost levels.

LmSRT4 · 10-31-2009, 08:59 PM

but i dont get it, i was boostin 18 before the rebuild

marthastricycle · 10-31-2009, 09:14 PM

Do a complete boost leak test?

LmSRT4 · 10-31-2009, 10:27 PM

i just looked up on how to make one so i need to do that but if i zip tied all the lines it should be sealed unless there is a crack or something in the middle of the lines somewhere

hercfe · 10-31-2009, 10:34 PM

Quote: Originally Posted by LmSRT4

i just looked up on how to make one so i need to do that but if i zip tied all the lines it should be sealed unless there is a crack or something in the middle of the lines somewhere

if you JUST rebuilt the motor, you may want to do a comp/leakdown test. could be more problems than just low boost.

stowaway · 11-01-2009, 06:14 AM

Quote: Originally Posted by LmSRT4

but i dont get it, i was boostin 18 before the rebuild

with the same wga and the same vacuum line setup?

DoodEdge · 11-01-2009, 07:44 AM

You WILL NOT get 18 psi out of the stage 2 wastegate without the pcm boost control solenoid or some other manual boost controller. You need to hook your vacuum lines back up like stock.

If you get an agp/ptp/etc adjustable wastegate you can do it how realtune says but that is only because those have like 12 psi springs and are adjustable.... the stage 2 waste gate has like an 8 psi spring and is non adjustable so without a boost controler of some sort you will only ever get 8psi.

LmSRT4 · 11-01-2009, 12:50 PM

any1 have the stock setup diagram for the vacuum lines? i will try that before i go any further, or should i just buy a better wastegate like agp or sumthing?

The First Ghost · 11-01-2009, 01:03 PM

the stock vac line diagram is printed under the factory hood..

DoodEdge · 11-01-2009, 11:16 PM

Just hook it back up like stock. Search stock vacuum line diagram or things like that

lil_hub_cap · 11-03-2009, 04:32 AM

Quote: Originally Posted by hercfe

if you JUST rebuilt the motor, you may want to do a comp/leakdown test. could be more problems than just low boost.

man has a point. boost leak the entire car.

m4ster_chef · 11-03-2009, 02:51 PM

Quote: Originally Posted by hercfe

if you JUST rebuilt the motor, you may want to do a comp/leakdown test. could be more problems than just low boost.

What'd that guy get b& for?

Also, what they said about having to be on pcm controlled boost. Without having the vac lines like they were stock, you won't make diddly with the mopar wga.