DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Turbo boosting 2psi only, stumped.

Thread Tools
 
Search this Thread
 
Old 06-11-2014, 02:10 AM
  #21  
Junior Member
iTrader: (2)
 
cjsafski's Avatar
 
Join Date: Mar 2008
Location: Irvine, Ca
Posts: 277
Total Cats: 23
Default

Originally Posted by whinin
Turbo spins freely by hand, spins for a bit after idling for a minute.
It should always be spinning. Even right after start up all my good turbos spun.
cjsafski is offline  
Old 06-11-2014, 02:16 AM
  #22  
Senior Member
iTrader: (1)
 
krissetsfire's Avatar
 
Join Date: Sep 2008
Location: Tucson, Arizona
Posts: 883
Total Cats: 56
Default

Have you verified base timing is set? My first guess would be same as sav. wastegate issues but you say you've tested them. You also say your wide-band is reading rich.

It would have to be a SERIOUS leak that would be madly noticeable without any real testing to lose that much boost. I drove home the other day with a cracked injector o-ring and a leaking coupler. I could easily hit 6 psi. Spool took a little longer but it would get there.

Make sure your base timing is setup correctly?
krissetsfire is offline  
Old 06-11-2014, 09:04 AM
  #23  
Newb
 
chiods's Avatar
 
Join Date: Jan 2011
Posts: 22
Total Cats: -4
Default

Originally Posted by krissetsfire
Have you verified base timing is set? My first guess would be same as sav. wastegate issues but you say you've tested them. You also say your wide-band is reading rich.

It would have to be a SERIOUS leak that would be madly noticeable without any real testing to lose that much boost. I drove home the other day with a cracked injector o-ring and a leaking coupler. I could easily hit 6 psi. Spool took a little longer but it would get there.

Make sure your base timing is setup correctly?
Base timing wouldn't have that profound on an impact. After seeing where he says the turbo will spin after a minute of idling and he had tried to clock it that's the issue it's not 100% straight and the wheels don't wanna spin. Op take the housing back off and reattach it properly. Watch a YouTube video if you have to
chiods is offline  
Reply
Leave a poscat -1 Leave a negcat
Old 06-11-2014, 10:23 AM
  #24  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

It's not that either, I had this problem before I even tore the car apart. Way back 2 months ago. Even so, the only thing I did was take the vband off, and once I saw how big those c clips were I put the vband back on. I've watched videos of it.

Someone asked me to see if the turbo spinned AFTER SHUT DOWN from idle. That's what I meant when I said 'turbo spins for a bit after idling for a minute'.

I set base timing about 2 weeks ago. Had to go so far as to pop the #1 cyl plug out and crank on the crank bolt till I got it at tdc so I could see the mark on the crank pulley. Couldn't see it before because it didn't have any white out on it.
whinin is offline  
Old 06-11-2014, 10:50 AM
  #25  
Senior Member
iTrader: (1)
 
krissetsfire's Avatar
 
Join Date: Sep 2008
Location: Tucson, Arizona
Posts: 883
Total Cats: 56
Default

Originally Posted by Full_Tilt_Boogie
Kinda sounds like its detonating
either that or you were driving through some gravel
When I listen I hear det too maybe i'm wrong. Timing being off a bunch wouldn't affect det would it?

Does your car run nicely with the wastegate open? As in it idles smooth and you could daily the **** out of it and flog on it? From the video it just doesn't seem right. boost or no boost. that's all.
krissetsfire is offline  
Old 06-11-2014, 11:23 AM
  #26  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Haven't tried tying the wastegate open yet, I may have to later today. It doesn't idle smooth anyways since I have a slightly bigger injectors in there.
whinin is offline  
Old 06-11-2014, 11:57 AM
  #27  
Senior Member
iTrader: (1)
 
krissetsfire's Avatar
 
Join Date: Sep 2008
Location: Tucson, Arizona
Posts: 883
Total Cats: 56
Default

As you may have seen others bow out. You have bandAIDS.

1) open the wastegate and get your car running to satisfaction without boost.
2) Do some research about ECU's; invest in something.
3) Ditch the bandaids. Boost for reals.

I'm taking my bat and glove and going home. peace.
krissetsfire is offline  
Old 06-11-2014, 12:00 PM
  #28  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,821
Total Cats: 3,481
Default

He really is a lost cause.
18psi is offline  
Old 06-11-2014, 12:04 PM
  #29  
Elite Member
iTrader: (1)
 
Full_Tilt_Boogie's Avatar
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 5,155
Total Cats: 406
Default

I like how fixing the bandaids meant removing one.
Full_Tilt_Boogie is offline  
Old 06-11-2014, 12:52 PM
  #30  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Yes there are better (much better) options out there, I know this. ****, I had a mspnp ready to go for my '96 when I had planned on turbo for it. This does not solve my problem though. My bandaid is not preventing the turbo from boosting past 2psi. I checked my piping (took it all out of the car, connected everything like it was in the car) and the piping is hold pressure. When I popped out the pvc plug I made, it popped. So it's holding pressure.
whinin is offline  
Old 06-11-2014, 12:54 PM
  #31  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 10,917
Total Cats: 2,201
Default

I mean.. if you're detonating nice and hard, it would absolutely keep you from making boost.
concealer404 is offline  
Old 06-11-2014, 12:55 PM
  #32  
Senior Member
iTrader: (3)
 
dieselmiata's Avatar
 
Join Date: Apr 2011
Location: Volo, IL
Posts: 1,356
Total Cats: 154
Default

Have you disassembled the turbo and inspected the wheels? Is it possible something destroyed the vanes of the exhaust wheel and it won't catch the exhaust flow for crap?
dieselmiata is offline  
Old 06-11-2014, 01:13 PM
  #33  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

I'm not detonating, I definitely know what that sounds like. I keep telling you guys, the thing that sounds like rocks in my video is my loose **** ****.

I have not taking apart the turbo, I did take a peek inside when I had everything else off the motor. I know there are parts of the wheels that hide inside the turbo that you can't see from the outside, but from what I could see they are fine.

On a note of my post above, I did forget to put my pipe in that I had made so I could hook up my IACV hose. I am leaking there. I sprayed some soapy water on it, and it shot it off the pipe, so a pretty significant leak. But my question (and I think I know the answer, Savington mentioned it) if it is leaking all the way at the throttle body, would the pressure be the same at the wastegate?

Also, I do appreciate all the help guys. I won't be able to post back in a few hours, work called me in to cover a minor shift.
whinin is offline  
Old 06-11-2014, 01:42 PM
  #34  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 10,917
Total Cats: 2,201
Default

So... you have a gigantic boost leak.
concealer404 is offline  
Old 06-11-2014, 04:41 PM
  #35  
Senior Member
 
Miater's Avatar
 
Join Date: Aug 2010
Location: Arl. Texas
Posts: 936
Total Cats: 27
Default

Originally Posted by whinin
When I popped out the pvc plug I made, it popped. So it's holding pressure.
??? PVC plug ???

Edit; I'm guessing its for testing IC pipe.
Miater is offline  
Old 06-11-2014, 05:52 PM
  #36  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Yeah I got a 1.5" pvc pipe plug, drilled a hole for a valve stem, capped one end and put that on another and used a bike pump to test pressure! Now I know what it is, I will attempt to fix it with some jb weld. Take out the brass hose barb, put some on the threads, and then some on the outside and hopefully it will hold.

If not, what do you guys use to to route your IASC valve to the intake?
whinin is offline  
Old 06-11-2014, 05:54 PM
  #37  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 10,917
Total Cats: 2,201
Default

Pics of what you're talking about?
concealer404 is offline  
Old 06-11-2014, 07:10 PM
  #38  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default



The stock hose goes to the side of the crossover tube to get air for the IASC valve. This is what I made, a 90 deg brass fitting with a hose barb end and used a piece of heater hose to make the connection.
Attached Thumbnails Turbo boosting 2psi only, stumped.-nojqugj.jpg  
whinin is offline  
Old 06-15-2014, 06:37 PM
  #39  
Junior Member
Thread Starter
 
whinin's Avatar
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Everything back together, no boost leaks, double checked with hood off, soapy water sprayed around the connections. I did have one at the beginning, but fixed it. Turbo still only does 2psi.

Going to cut out my catalytic converter Tuesday and just put a straight pipe in the place for now, tie the after cat o2 sensor out of the way.

If that still doesn't solve my issue, what else could there be? Compared to my '96, there is no power, even with 2psi. It takes it forever to get to 40 mph in 2nd gear.
whinin is offline  
Old 06-15-2014, 06:39 PM
  #40  
Senior Member
iTrader: (5)
 
mlev's Avatar
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 655
Total Cats: 70
Default

Just disconnect the exhaust behind the DP, no need to cut anything. Run straight DP dump and see if it helps.

My apologies if you meant cut figuratively.

I still think you need to check the turbo over more carefully. I spent two days chasing your exact problem and then the front fell off.
mlev is offline  


Quick Reply: Turbo boosting 2psi only, stumped.



All times are GMT -4. The time now is 02:24 AM.