Hi folks. Have been reading in threw the forums searching for answers. I have a B16 turbo. And unfortunately it has stopped boosting. The engine has been fully built by Powermax NI and tuned by Bradly Motorsport. I bought it off a mate because it isn't boosting. Turbo was checked all was fine. Turbo is a bit big for the build. And wouldn't go into boost until second gear. Local mechanic screwed the manual boost controller up a bit more and it was boosting brilliant. It then sat for 6 months. And now it won't boost anymore. Mechanic had it and can't figure out why it's not boosting. He says the turbo is too big. Would there be any other reason as to why it wouldn't boost. I noticed that the external wastegate was getting vaccum to the top port from the intercooler piping before the throttle body. I thought this should be from the compressor housing and to the bottom port? Checked all intercooler piping it seems fine. Anybody able to help would greatly appreciate it. Thank you

 

 

Without knowing a single thing about your car or set up, it sounds like your waste gate is hooked up wrong. Google your gate and route it to a good vaccum source. Then go do a 3rd gear pull and watch your boost pressure.

 

Thanks for the reply. I have fitted a quick tap on the coupling on the turbo housing and gonna route it to the bottom port on the wastegate. Hoping this will give a better better boost reference. Or should I get another tee piece and take it from the manifold. Would the nipple on the intercooler piping create a boost leak that it was previously attached too? Yea sorry I will try to post a pic of engine bay tomorrow and show it clearer. The engine has been bored out and had forged piston and rods. Tial wastegate. Log manifold. Garrett journal bearing turbo. ar83. Not sure model. It looks like it off a skyline or something. 480 injectors. Walbro 255 pump
intercooler and bov look like eBay specials. Also when i start the car within 30 seconds turbo and manifold are quite hot. Because the car has been sitting so long it's actually smoking?? Is it normal for it to heat up so quickly. Thank you again for your help I appreciate it

 

If you leave a nipple open, it will leak whatever it’s connected too. Just take that nipple and hose and stick on on the bottom of your wastegate and see what it does.

and if it’s smoking out of the tailpipe, that could be many different problems/issues. If the exhaust manifold itself is smoking because it’s hot, that could be the painted finish burning, oil, or other fluids that may be on the manifold getting hot and burning off.

back to your issue of “not boosting”, hopefully your wastegate is being held open. Not much else makes sense if the turbo is fine and piping installed correctly. You should be getting something unless that Gate is holding open

 

Yea that's what I thought. IV already done a quick fit to the coupling on the compressor side. And hooked a manual boost controller on it. The other nipple is on the intercooler piping before the throttle body. Would it not be best on the compressor side. IL block one off and see if it works. As for the smoking issue is the manifold. Hoping its just grease and dirt. I'm more surprised at how hot it is getting in such a short space of time. I will post pictures tomorrow of how the vacuum lines are routed. Thanks for your help again Nathan937

 

It’s typical for your manifold to be warm/hot to touch after 30-60 seconds. And the compressor is fine for a reference point. At least for what your trying to do. And no problem. Hopefully that takes care of it.

 

boost pressure reference can be used on the compressor housing, but is not at all the best locatiolocatireferencing.

 

sure, for the sake of him already poking a hole in the coupling, it will at least see if his set up can work. And although it’s not always the best, it’s required on my set up. As when I moved my reference to the IM I developed compressor surging at heavy accel. Never had an issue at the housing.

 

Regardless of where you are referencing boost pressure, that top port is not used unless you're running an electronic boost controller.

 

More than likely that switch wasn't with a dedicated line.

But regardless, you're right... the top port is only for electronic boost controllers.

 

it was actually. A new hose, ran directly from WG to open port on IM I had left over.

OP, any solutions on your issue?

 

As we wait to answer, a new hose could easily collapse if not the right type

 

Since the WG relies primarily on positive pressure to function properly, wouldn't a thin-walled cheesy hose be more prone to bursting, rather than collapse, since it's main operation is under positive pressure?

 

You would think that, right? But no. It's not the positive pressure that causes that issue (that involves the compressor and intercooler) , it doesn't inflate like a ballon. It collapses.

 

I fail to grasp how that would be the case. If I remember right, I purchased bulk vacuum hose from the local parts places.

the issue I had with it, was at a heavy part throttle, the WG wasn’t seeing the signal it wanted, so it stayed closed. Even though the car wasn’t using it all (at least how I’m figuring it) I pulled the plug from my housing, put a nipple back in, and hooked it directly to the housing with the same hose. And I didn’t experience any more surge. Just had to bump up my MBC to accommodate for the 1-1.5psi drop I experienced from changing back to the housing.

 

humm, maybe thicker walled tubing like a fuel feed like may be a little better?

 

Sorry Nathan. Didn't get to test it out yet. The oil feed pipe has nipped on the auxiliary belt. So trying to source a new one. Everyone is furloughed and not at work to get one lol. I would of thought you would get a more accurate reading from the housing. Were is the best place?? Off the manifold. The vaccum line isn't great it feels like fish tank tubing tbh.. I ended up using the vacuum line for my MBC in the meantime. It was pretty long..

 

If you haven’t already poked a hole in your coupler, go ahead and route that port (bottom of WG) to an open nipple on your intake manifold. Typically the IM works for nearly everyone (my car on the other hand, fights me at every last step imaginable). If you already poked a hole in your couple, just go with it there. For what your trying to do, the IM or at the compressor should give you a good enough reference to at least rule out your problem.

 

 

What do you's think of the dump pipe. It doesn't seem to be air tight. You can see light threw it (in pic). Obviously this will be after wastegate has opened so shouldn't affect boost ??

 

is that the WG flange contact at the manifold? Looks like your gasket said,, "**** this, I'm out!"

You put this setup together or buy the car this way?


Edit: I just read that you bought this thing.. Brother, this setup is FULL of no go. My suggestion is start from scratch and put it allllll back together yourself.

 

Well, it’s hard to say on that dump tube gasket. I don’t see any black soot coming out, but it looks like you have several other problems.

1. you turbo drain, you don’t want our drain to go low, then travel back up. You wan a nice down ward flow to our oil pan.

2. Is that a trans cable or something that’s melting on your manifold?

that vac line isn’t the greatest as far as that bend up there coming out of the gate, but I would imagine it would work to get your car to build boost.

if I were you, start doing a lot of browsing around and look at others set ups to give you an idea on how to start re working yours. Like dragon said, it would be a good idea to start sorting through this and correcting what you can. There’s no telling what all is out of place or installed in correctly.

 

Nvm, that’s your throttle cable. Either way you gotta do something with that. I’m suprised it still works, does the car accel fine using that thing?

 

looks like a trans cable. Throttle cable is on the back end. Lol