Re: Over Boosting? Need some help guys
 

30psi is a ton of boost creep, wow.
Did you try hooking the actuator directly to the intake manifold vacuum source?

Re: Over Boosting? Need some help guys
 

Edit: I missed this post:

Do this:

Re: Over Boosting? Need some help guys
 

Boost source will be going to the intake next. with that flapper open like i had it. Shouldnt i have not been able to boost at all?

Re: Over Boosting? Need some help guys
 

It should have been as low as you can physically go if you were sure the arm was removed and flapper stuck actuated to have the wastegate channel open. That is why halon was saying if you still were getting creep with the wastegate fully open changing the actuator will not help cure your problem. You will need to enlarge the wastegate so you can vent off more air.

The steps people want you to take are as follows:

1. Open wastegate fully check air flow by disconnecting rod/actuating flapper. Once you confirm you can flow enough air to avoid the boost raising above your target point then go to step 2. If you cannot flow enough air you know this is your problem.

2. Hook actuator back up to compressor source without mbc installed. The boost should build to the point in which the spring holding the wastegate flapper is overcome by the boost pressure. The wastegate will then open and start diverting exhaust gases away from the turbo. If this works correctly and only creeps to a stable amount like the 20-21 psi shane said then you know this is going to be your boost level unless you set the mbc higher. You can then go to step 4. If your still getting a problem after this you can check the following: actuator arm stuck/not working bad actuator or go on to step 3.

3. Hook actuator up to inlet source. If this fixes your problem then it was something with the source. Go on to step 4.

4. Install mbc. Set boost level. If you set it below the 20-21 psi (or whatever psi the wastegate actuator/flapper is allowing to flow) its likely going to creep back up to that anyway. If you set it above it should build to the desired level and hold. If your just spooling building boost as before then you know its your mbc.

Re: Over Boosting? Need some help guys
 

If I am reading this right and the arm was removed to allow the flapper to open all the way right away, then you have bad boost creep. The fix would be a larger flapper and porting or an external wastegate. Another option is to choke the exhaust or intake system so that the turbo has a hard time making boost, which obviously isn't the best option for power.

Being able to hold 12psi fine with a 16G on a DSM is actually weird and not how they normally act. And what his car is doing does not matter and is not going to fix what yours is doing.

Re: Over Boosting? Need some help guys
 

How a 16g could build 30psi with an open wategate flap blows my mind, unless either 1) your flap is welded shut and you don't know, or 2) you are running no exhaust and are giving it more air than any 16g in history. Most barely get over 30 with a basically forced shut flapper.

Re: Over Boosting? Need some help guys
 

Bad boost gauge?

Re: Over Boosting? Need some help guys
 

Yes you are right i removed the arm, and gave her throttle and at about 6k had about 25 pounds of boost. Im debating on going with a larger flapper, but would like to go with a external wastage set up. But don't really have the money for that. For a proper external waste gate would you go off the manifold or the o2 housing? And i would need to weld that flapper hole shut.

Re: Over Boosting? Need some help guys
 

Manifold at the collector or O2 housing.
I have an O2 housing built for ext. WG if you ready to buy.

Re: Over Boosting? Need some help guys
 

I think i would want to go with a ext. WG at the collector of the manifold not the o2 housing? Ive read that you would need to do porting every time you change your turbo if i went with a ext. WG off the o2 housing. And that people recommend going with a ext. WG off the manifold.

Re: Over Boosting? Need some help guys
 

^Where the fuck are you reading this shit you come up with?

Well it worked for me just fine, I put in 28psi springs and it was rock solid.

Re: Over Boosting? Need some help guys
 

^Where the fuck are you reading this shit you come up with?

Well it worked for me just fine, I put in 28psi springs and it was rock solid.

Re: Over Boosting? Need some help guys
 

Read it some where on tuners a while back


Im going to look at how that thing is hooked up. The previous owner installed it.

Doesn't make any sense to me either like at all. The flapper is not welded shut from what i know i can move it with ease. I do have a 3inch turbo back exhaust but it still doesn't make any sense to me. Im going to take it apart this weekend and look into getting some parts.

Re: Over Boosting? Need some help guys
 

If you go off the o2 housing, don't expect it to perfectly fix the boost creep, unless you make the hole in the turbo bigger and port it.

Re: Over Boosting? Need some help guys
 

whats a good manifold that's mitsu flanged and has a provision for a Ext. WG? All the ones I see on classifieds and on extreme psi are t3 flanged.

Re: Over Boosting? Need some help guys
 

There is none.

Re: Over Boosting? Need some help guys
 

Wouldnt the solution with the test he did be to port the hole behind the flapper until its close to the size of the flapper? probably a ebay or amazon 16g ive read you have to do this to eliminate the boost creep on them.

Re: Over Boosting? Need some help guys
 

If it's a Chinese 16g just get rid of the Damn thing, they are known garbage

Re: Over Boosting? Need some help guys
 

not an ebay piece of shit

http://www.dsmtuners.com/threads/evo...%C2%94.163103/

I could...... but i think imma take a different approach.


Attachment 15134


Imma run a 10cm t3 turbine hosing on my 16g. Then get a nice t3 manifold, with a provision for a external wastegate. Then get a flange for the o2 housing and weld an elbow on it and maybe do a v-band down pipe i have always wanted.

Re: Over Boosting? Need some help guys
 

you are way over thinking this for something so simple