Turbo Boost Creep Creeping T25 14B 16G [Merged]

[SpawnedX]

If you port properly, than yes.

 

[Dsmj89]

I also have a 14b that is creeping on my 3" exhaust.
I'm just doing it the easy way, i have a hafe manifold on the way and i am going to be running an external wastegate off it, done...
No porting ever needed.

 

[timsturbotalon]

you will have boost creep. i have the problem on my talon.

 

[Xeiros]

I also have a 14b that is creeping on my 3" exhaust.
I'm just doing it the easy way, i have a hafe manifold on the way and i am going to be running an external wastegate off it, done...
No porting ever needed.

No guarantees there. Be safe and just port it while you've got the turbo off anyways. Do it right the first time.

 

[Dsmj89]

No guarantees there. Be safe and just port it while you've got the turbo off anyways. Do it right the first time.

No guarantees ? I can deffinately guarantee i won't creep, from experience.

I have 2 friends who are running this same manifold after having nasty boost creep with their 16g's, after this manifold/wastegate install on their cars, boost creep was GONE.
They didn't have to port anything either.

Porting is required if you run an external wastegate off the o2 housing.

 

[SpawnedX]

Running an external gate off one runner is asking for that thing to crack. However, you can still easily have creep. Do you have a 3" TBE or Catback?

 

[Dsmj89]

Both my friends and i all have full 3" turboback exhausts, and although i do see your point of view of asking to creep due to running it off one runner, their cars won't creep past whatever boost they have dialed in on their cars.

 

[SpawnedX]

Well a borrowed Hafe and 38mm didn't solve my creep issue completely is why I am saying it. It still crept past 21 pounds which is what I was set at.

 

[Xeiros]

I know people that can dump their BOV's with little to no ill effect, so would that guarantee that I could do it as well? No. I'm just saying I'd cover your bases just in case, rather than have an issue and have to do it again. Are you planning to weld in a plate on your turbo or trying to lock the flapper down?

 

[SpawnedX]

Just curious...couldn't you lock the flapper down by keeping the actuator on there but not feeding it a boost source?

 

[Xeiros]

That I don't know. I know with subies, grimmspeed sells these little brackets that just lock the flapper into place if you don't feel like welding the hole shut. I can't imagine someone having a very hard time making one.

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[Dsmj89]

I plan to weld my flapper arm shut and then take off the wastegate, same thing my friends have done with success.

To the OP, as of today 02/19/11, i had my flapper arm welded shut and took off the stock wastegate, will be putting in an external wastegate soon.
If by the time i get mine you already have done yours, let me know how the result was, if not i'll keep you updated.

 

[tobillo748]

thanks a lot guys looks like I'm gonna be doing some porting!!

 

[99gst_racer]

Just curious...couldn't you lock the flapper down by keeping the actuator on there but not feeding it a boost source?

The flapper could and probably would still blow open at some point.

 

[SpawnedX]

I wonder if that is why the external gate on the Hafe didn't solve the problem, but a flapper lock like above should do it.

 

[dawid4444]

i creeped to 22psi on my evo 16g and i took the flaper out instal my tial external wastegate on the o2 housing and guess what ?

NO MORE BOOST CREEP AT ALL and you can trust me with that
thats the easy way to do it

and ofcourse if u took flaper out you can port a lil flaper hole but it is not requaireed
i didnt ported anything in my turbo and no boost creep anymore

i ported my manifold as well when i had it out

thnks

 

[fran_drivertsi]

Bigger WG flapper will help your problem as well.

 

[GsXdSmKingGsX]

]I plan to weld my flapper arm shut and then take off the wastegate[/B], same thing my friends have done with success.

To the OP, as of today 02/19/11, i had my flapper arm welded shut and took off the stock wastegate, will be putting in an external wastegate soon.
If by the time i get mine you already have done yours, let me know how the result was, if not i'll keep you updated.

Thats the most common thing I see people do.. It works with great success

 

[Dsmj89]

Thats the most common thing I see people do.. It works with great success

Sure does. I can't wait to get my external and test it out and report back.

 

[Dsmj89]

Got my hafe manifold in. Big collector as well

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[yeti-gvr4]

I fixed all of my boost leaks (other than a few small ones) now I'm boost creeping to 30+lbs

So I'm just tryin to get definate ways to cure boost creep down.

So 1 external wastegate which involve taking off current o2 housing and replacing with 02 with external wastegate

2. I've been hearing that just an external dump could stop the boost creep . Would I have to port the o2 housing and wg for this to work.

3. Stock exhaust. I don't want this cause then that involves taking off old exhaust and weling new hangers??
Also robs me of power already achieved.

4. Port the hell out of the turbo and exhaust mani.?

5.I'm preety stuck for now any IDEAs

And can someone go over my list and tell me if my thoughts are correct.

 

[LiquidX]

You are creeping due to the turbine housing design. The wastegate entrance is a restriction when the exhaust is free flowing in comparison to the turbine wheel. You will want to port the inlet as much as you can to eliminate the need for the exhaust to turn into the wastegate hole. This is done while still using the stock wastegate.

To utilize an external gate, you can either weld the flapper shut and run the external off a custom manifold designed for the gate to be either off a runner or at the collector. This will solve your boost creeping as well.

If you choose to run an external gate off of the o2 housing then you will need to either remove the flapper or wire it open. With that in mine you will then need to massively port the wastegate hole to allow as much exhaust as you can to enter. If you don't port it out then you will still experience creep regardless of the gate size as the wastegate inlet hole is the restriction.


So basically, your best and cheapest option is to just port the turbine housing inlet to make the wastegate a less restrictive entrance.

 

[yeti-gvr4]

How hard is it to port thing I can imagine the amount of force but I'm just concerned on how much skill is required are you just trying to make everything flush and not to thin?

I'm worried about porting it to much and having it crack in a spot.

Is there any chance it will not bolt up right ?

I'm preety convienced to do this but thinking of buying another cheap used 16g somewhere and porting that one so the car won't be down for long.

Do you mean to grind the step for the o ring gasket away on the turbine inlet.
The one it describes on vfaq.com

Or should I also plan to port the 02 housing

 

[dsm03]

If you are unsure how to do I port job, Id recommend taking it to a machine shop and let someone who is experienced handle it..


last thing you want and need is to replace a turbo for a silly mistake!

 

[Maverick4g63]

If you are unsure how to do I port job, Id recommend taking it to a machine shop and let someone who is experienced handle it..


last thing you want and need is to replace a turbo for a silly mistake!

x2


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