problems after install

[nfinkbe]

I just got finished installing my big 16g and everything went fairly smoothly. After i started her up i got a check engine light for the O2 sensor and i figured that was just from the antiseize burning off. after driving around not boosting for like 10 min i started to push it. it immediately went to around 20 psi so i got out of the car and turned my boost controller all the way down. this time it didnt go straight to 20 but eventually got there. so even with my mbc set as low as i can it still wont hold any number. i assume this is from boost creep but was unsure so i decided to ask here. btw i did not port the turbo or O2 housing because of time and i did not have the right tools. i am going to do a boost leak test tomorrow morning and see if i come up with anything. is there anything that im missing or not checking that might be causing this?

thanks,
Tate

 

[-DSM2NR-]

I'm sure it's boost creep. I doubt it's a boost leak. Take the turbo off and port it. Also port your o2 housing and manifold. That should fix your problem and add a little more power.

 

[oldman]

http://www.dsmtuners.com/forums/showthread.php?t=186525

 

[nfinkbe]

i figured it was boost creep and i have plans on porting everything but wont be able to until i go back home for a weekend, because im heading back to college in a day or two. i was wondering if it could be a bad wastegate spring or something like that as well. it is a used b16g so who knows. anyways thanks for the responses so far.

 

[oldman]

i figured it was boost creep and i have plans on porting everything but wont be able to until i go back home for a weekend, because im heading back to college in a day or two. i was wondering if it could be a bad wastegate spring or something like that as well. it is a used b16g so who knows. anyways thanks for the responses so far.

A defective wastegate actuator or mbc will more likely cause the boost to shoot straight up instead of pause then creep.

 

[nfinkbe]

the first time i went wot it did do that but then like the third time i heard something "pop" and thought it may have been the wastegate becoming unstuck. because after that boost would go up slower. anyways im gonna try and get the porting done as soon as i can. instead of porting the exhaust manifold i might just go aheah and get an evo3 or sbr mani. thanks for your replies.

 

[oldman]

It's possible that either the mbc hoses was reversed or a stuck wastegate causing all out boost which than created a huge boost leak (or exhaust leak) on your third pull (pop) so you now have a sloooow all out boost, I hope I'm not confusing you.

Does the boost hit a certain level fairly quickly, pause for a split second, then creeps up as rpm increase or does boost slowly go up in an even sweep?

 

[nfinkbe]

i will check again tomorrow, but i think it tried to "stop" but kept going. in the morning im doing a boost leak test and i will also check that so i will have more info for u.
thanks
Tate

 

[nfinkbe]

i decided that im just going to stay at home a little longer and port everything out. i bought an air die grinder and i need a carbide bit. i cant find anything around where i live so i guess im gonna have to get one or two overnighted. http://www.american-carbide.com/Burs/CB.aspx
i was going to get the third one down part number 2362001. does that look like a good one to get. or should i go with one of the top two. thanks.

 

[oldman]

All you need the third one with the ball nose tip and your regular dremel accessory tips to clean up after porting. The pictures are also confusing as they look like single cut pattern, make sure what they're selling is double cut.

 

[nfinkbe]

yeah i check and they have both so i ended up buying the double ones. also when my turbo was off i was going to see if i could take the exhaust housing off and clean everything off a little, but after i took the clamp off there was no getting that thing off. i think i even tried to pry it with a screwdriver. any tips that u can give me for taking it off. i figure i can just hit it softly with a hammer but im not sure. and i know that there is a little thing on there that keeps it all centered right so i will make sure i dont lose that as well.

thanks
Tate

 

[oldman]

Spray some PB blaster on it then tap it lightly with a rubber/wooden hammer, hold on to the housing with your other hand so it doesn't pop out and damage the turbine wheel.

 

[nfinkbe]

well i put a lot of pb blaster on in last night then let it soak in. then i tap it with a wooden hammer and still nothing. wont budge at all. so i tried to wedge a screwdriver into it by tapping it with a hammer and still nothing. this thing is like its welded on or something. should i take it somewhere and see if they have any luck with it or should i just port it with the exhaust housing on? im out of ideas so please help me.
thanks

 

[oldman]

Remind me, is the turbo out or still on the car?

 

[nfinkbe]

i took it off last night.

 

[oldman]

Remove the o2 housing, stuff a cloth down the inlet and go to town, make sure you blow all the metal shaving out of the turbine housing with an air compressor when you're done.

 

[nfinkbe]

yeah the o2 housing is already off and i figured thats what i would have to do. well here it goes. btw thanks for all the help.

 

[oldman]

You're welcome and good luck.

 

[nfinkbe]

ok i finished up my porting today and installed everything back on the car. guess what still boost creep except this time boost goes to whatever i have it set at then rises to around 20psi. its nowhere near as bad as it was but its still there. here are some pictures of the porting and of the turbo.

 

[oldman]

You should have posted the pics before you slap them back on. Besides a much needed clean up with sand rollers, you did about 60-70% of what is needed compared to the picture below, unfortunately the remaining 30-40% accounts for most of the chances for success. I have done this many times myself as well as helped many members achieve the same but the port job must be near perfect.

 

[nfinkbe]

i actually did clean it up after that picture but i guess i didnt take it down as far as i needed to in the first place. looks like another fun weekend of porting is coming up. . i might end up buying an evo 3 o2 housing and sbr manifold before that so i can get it all done at once.
thanks for the help.

 

[oldman]

You see how the he blended the entire inlet from the surface of the flange where you started about 1/4" into the inlet. From that point on, the entire inlet should be a smooth cone shape without and curves or bumps. I'm impressed that you will re-port again as most would have given up by now. Have you port the wastegate outlet and o2 housing? Did you match the turbo inlet to a 7cm gasket? Did you match your manifold collector?

 

[nfinkbe]

i did port the wastegat outlet and the o2 housing and did port match the inlet to a 7cm gasket, but i did not port the manifold. i think i am going to wait like 2 or 3 weeks and buy an sbr manifold and evo3 o2 housing so i dont have to take everything off again. i will just port everything then and i will post pictures before i put everything back on . about the giving up thing, im pretty persistant when it comes to things like this and will do whatever it takes to get it right no matter how long it takes.
thanks again for all the help i should be posting again in a few weeks to give an update.

Tate

 

[oldman]

You're welcome, best of luck.

 

[oldman]

Oh, use capitalization in your posts damn it.......I mean please.