Wastegate broke..... what now

[Twinturbo2800]

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NEW TROUBLE.... SEE LAST POST PLEASE!!! we thought i needed a new MBC but i got a new one and that was not the problem.... ### ANY HELP WOULD BE GREAT!!!

 

[DGajre777]

You can get a stock wastegate actuator or a high pressure 17psi one from Forced Performance for $99. www.forcedperformance.net

 

[Twinturbo2800]

^^

maybe im slow but im not seeing a wastegate on thier for 99$

 

[DGajre777]

^^

maybe im slow but im not seeing a wastegate on thier for 99$

http://store.forcedperformance.net/..._Code=###28DSM17psi&Category_Code=DSM-TurboHW

Or go to their website, click on 'Diamond Star' and then 'Turbo Hardware' it is the 6th item.

 

[Twinturbo2800]

can i go from stock to a external WG ? am i gunna need anything else to make it work?

i dont know alot about this

 

[Mr Peepers]

http://store.forcedperformance.net/..._Code=###28DSM17psi&Category_Code=DSM-TurboHW

$99 is kinda steep for an actuator(high pressure or not) to me. I would look in the classifieds for someone with a spare actuator personally if you're going to be selling the car anyway.

Edit: DGajre beat me to the link

 

[DGajre777]

can i go from stock to a external WG ? am i gunna need anything else to make it work?

i dont know alot about this

You can, but it is going to cost you about $400 for the o2 housing and an external gate. YOu will have to take the internal wastegate flapper out. www.punishment-racing.com has some good cheap ones. There is always SBR, SLS and other companies.

 

[Twinturbo2800]

whats the wastegate actuator? got any pics or anything? im so clueless with wastegates...

thought all i would need was a spring or osmthing maybe

 

[DGajre777]

whats the wastegate actuator? got any pics or anything? im so clueless with wastegates...

thought all i would need was a spring or osmthing maybe

The spring is INSIDE the wastegate actuator. Check the link I gave above to see what it looks like.

 

[Twinturbo2800]

your link brings me to a page with no items on it. not sure what your talking about

 

[Mr Peepers]

4g63 performance parts, then wastegates. Or, click this link
http://www.punishment-racing.com/wastegates.html

Edit: by the way the link me and DGajre posted goes to a page with no items also(worked fine before). Follow his instructions in his original post to find it.

 

[delta448]

Like Dee said, you need a new actuator. It's the part that the vac line hooks to, the part with the spring inside it, the part with the long arm that stretches across the turbo from the compressor housing to the wastegate flapper arm on the turbine side. Basically, air pressure overcomes the spring, then the diaphragm inside pushes the arm down and flips open the wastegate flapper which is built into the exhaust housing.

On FP's site click "Diamond Star" on the menu on the left, then click "Turbo Hardware" and look for this:

 

[Twinturbo2800]

ah sweet, thnx so much guys!!!

 

[oldman]

looks like my wastegate spring in my stock wastegate aint working anymore.... its pissin me off not being able to boost much past 9-10psi.

What have you done to come to the conclusion that the wastegate is the cause? I'm not doubting your ability, just making sure you don't buy a new actuator for nothing. Many things can limit you to 9-10psi, the wastegate itself is usually the last on the list.

 

[Twinturbo2800]

hmmm, well ###### about a year ago my boost droped from 15-16 psi to 10psi. and i couldnt get it anyhigher.... so i just lived with it for awhile until a couple months ago when my turbo blew up.... so i bought another shitty t-25 outta another gsx.

I thought maybe buying the turbo would help but im still only boosting to 10psi WOT. my friend called some kid who knew alot about dsm's and said it sounded like a wastegate spring gone bad. so thats where im at now.

hope hes right cuase i just bought the 99$ wastegate actuator thingy

 

[luvmygst]

Do you have MBC? The stock spring is like 10 psi or somthing. I doubt it is a wastegate problem. What are you reading boost with?

 

[oldman420]

check tech articles on how to check for boost leaks. Could be a free fix.

 

[Mr Peepers]

Did you try to set the MBC again? If i didn't tighten the nut down to hold the screw in place, my MBC would gradually back itself out and go down to wastegate pressure.

 

[DGajre777]

hmmm, well ###### about a year ago my boost droped from 15-16 psi to 10psi. and i couldnt get it anyhigher.... so i just lived with it for awhile until a couple months ago when my turbo blew up.... so i bought another shitty t-25 outta another gsx.

I thought maybe buying the turbo would help but im still only boosting to 10psi WOT. my friend called some kid who knew alot about dsm's and said it sounded like a wastegate spring gone bad. so thats where im at now.

hope hes right cuase i just bought the 99$ wastegate actuator thingy

Upgrades like exhaust, intake, upper intercooler pipe etc will raise your boost a few psi if you don't have a boost controller. If you install a boost controller and turn it all the way down you'll get 11 psi which is the stock wastegate spring pressure.

A boost controller will allow you to increase boost from the spring pressure. So the lowest boost you can run on a stock T25 with the stock actuator is 11psi. When you get the 17psi actuator, the lowest boost you will be able to run is 17psi - without a boost controller.

If you somehow went from 15-16psi back to 10psi, and have a boost controller, check that first or disconnect the boost controller when you get hook up your new 17psi actuator from FP.

 

[oldman]

hmmm, well ###### about a year ago my boost droped from 15-16 psi to 10psi. and i couldnt get it anyhigher.... so i just lived with it for awhile until a couple months ago when my turbo blew up.... so i bought another shitty t-25 outta another gsx.

I thought maybe buying the turbo would help but im still only boosting to 10psi WOT. my friend called some kid who knew alot about dsm's and said it sounded like a wastegate spring gone bad. so thats where im at now.

hope hes right cuase i just bought the 99$ wastegate actuator thingy

So basically nothing was done to verified his GUESS.

I strongly suggest that you put a hold on the order before shipping time. It's already Friday anyway so you won't see your order this weekend, one more day won't hurt. You need time to verified.

After you put a hold on the order, go outside and pull the vacuum line off the actuator, fold the hose back and zip-tie it, go for a test run with the actuator fitting open to atmosphere. Post back whether you can boost past 10psi.

 

[Twinturbo2800]

ok, ill try that.

and YES i have a turboXS MBC.
greddy rs bov
intercooler piping
injen intake
3" thermal catback
hollowed cat.

 

[Twinturbo2800]

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ok i took the line from my boost controller --to-- the wastegate off and i boosted well past 20 PSI... had to let off it fast .

so what now?

 

[oldman]

so what now?

Cancel the order and say "thank you uncle Bruce".

After that, you're going to tell us how your POS TurboXS bleeder mbc is hooked up, the problem clearly is the MBC.

 

[delta448]

POS TurboXS bleeder mbc

IMO, the worst choice I've made for my car was deciding to buy that mbc.

To OP, Bruce is absolutely right. I should not have assumed you knew for certain the wastegate was the problem.

Now, I'll sit back and watch the show.

 

[Twinturbo2800]

thnx uncle bruce!!!

well my MBC has a line going to the turbo and the tail end goes to the wastegate i think. i had my buddy help me set it up , i dont know alot about this stuff

oh and BTW thiers a decent amount of oil all over the boost controller... is that normal?