Since not many people put k04's on LSJ's, the turbo LSJ thread wouldn't be too helpful.

Anyway, I cannot get above 10psi. I have checked everything top to bottom. Boost leak checks, double checking my vacuum line routing, verified wastegate operation to no success. I am stumped and frustrated. The only other thing I can think of is faulty boost controller, however I dont see that because it is a new Hallman ES.

Any help that anyone could provide would be appreciated.

Also, could any of you LNF guys running atmospheric BOV with an MBC provide some pics of your vacuum line routing to further verify my setup?

I've done everything I know to do so any help at this point would be nice.

 

Are you running the complete LNF kit on your LSJ, or a variant, or completely different kit? I have been trying to research if the LNF kit will fit if I get everything needed, and I can't get an absolute answer either way. Thank you for your insight!

 

I am running LNF k04, turbo manifold, O2 housing, hotside piping, downpipe and oil lines. Saab Intake Manifold and everything else is custom

 

Boost leak? does it run ok with 10 psi?

 

did you see what it runs without a boost controller as a reference?

 

i thot the title was LSJ Tissues ahahha

 

this, it sounds to me your boost controller is backwards and when it is it defaults to the waste-gate spring. I bet your waste-gate spring is a minimum of 10psi. Turn your boost controller hoses around and try it again. That is why mine would not boost past 15 on my 20g. I had the BC hoses backwards and it acts as a single hose from turbo to WG. When I flipped it that is when my boost controller became usable and allowed me to turn up the boost over the minimum 15lb spring.

 

No, I didnt. I wish I had

This sounds plausible. I will try it tomorrow. Nothing else has worked so why not.

 

hey everyone in here is from the turbo lsj thread, lol. You could have asked us in there. But the only way to learn sometimes is to fail. I have done a lot of learning since I bought this car and turbo'd it.

 

I noticed that too. I just didn't know if since it was a k04 if ppl could help

 

it's easy to find out what you're boosting off the spring. Just disconnect the bc and go have some fun in mexico. once you know...hook the bc back up the way you had it, go back to mexico, and crank up the bc. If nothing happens, then switch the lines and see what happens.

 

Not sure if this was implied or what, but I DO NOT have the factory LNF boost solenoid on my turbo. Could this be my problem? Since I dont have it, how could I get my boost up to where I want?

 

on the turbo there are 2 places to get vacuum, switch it from the one you have it hooked to to the other one, and it should work. then adjust your boost controller.

there is a post and pre boost fitting. its weird, just plug the vacuum line into the other. dont run it in a "T" like the factory setup is though. where 2 lines go to the solenoid then a line to the wastegate.

run a line from the compressor housing to the controller and then to the wastegate.i just dont remeber which one, one gives full boost and the other no boost.



i have been running this way for about a year, lnf on a 2.2 sunfire

 

After staying up all last night researching, i tried to mimic the stock boost control setup. What I did is run a line from the controller to the wastegat as normal. Then ran both boost source fittings to a tee and then ran the tee up to the controller. Test drive----no change. No matter what I do, its only running 10 psi, the wastegate pressure allowance.







So, you're saying I only need to connect one of the boost source fittings to the controller? If so, which one?
Which is pre boost and which is post boost?

This is getting very frustrating.

 

get rid of the stock boost pressure regulator sensor crap. Tube from wg to bc, tube from bc to turbo. Make sure the orientation is right according to your bc directions and set it from there by driving to induce boost and when it starts going over 15 stop and back the boost controller down till you know its stopping the pressure at 15 or the other way if you are not boosting over 10psi. Then you have your reference point. Get rid of all the t fittings, its letting your wg vent to atmosphere somewhere and defaulting to the spring. the turbo vaccum line to the bc allows the wg to stay closed longer due to the vaccum on the wg vs spring pressure.

 

its just trial an error between the 2 sources, one will work one wont, tada thats it

 

So when I find the boost source that allows for full boost, what do I do with the other fitting? Do i cap it off somehow or just let it vent to atmosphere? I'll be playing with it some more today after i run some errands so I will let you guys know what I find

 

just leave it open to vent

 

Any help here guys?

https://www.cobaltss.net/forums/2-0l...stance-294870/