evo green spool
take it off and inspect the valve. make sure a good seal is made. also blow into the vacuum port on it to make sure the diaphram isn't ripped. if it is, what you blow in, will just come out. if the diapram is ripped, or the vacuum line isn't hooked up (or has a rip/tear/hole in it), or if the valve isn't seated correctly, boost will be VERY slow to build... if it ever gets to what your aiming.
one difference between a wastegate issue and a BOV issue, with a BOV issue, the turbo will be trying super hard to make boost. you'll hear it wind up but there will just not be any boost. with a wastegate issue, the turbo will not spool at all until really high RPMs. and by spool i mean you wont be able to hear the turbo spinning until late in the RPMs. so in essence, do you hear the whine of the turbo spinning right away, or never?
of course if it was working fine before, then you put the green on and immediately had boost problems, it will be obvious what the problem is.
one difference between a wastegate issue and a BOV issue, with a BOV issue, the turbo will be trying super hard to make boost. you'll hear it wind up but there will just not be any boost. with a wastegate issue, the turbo will not spool at all until really high RPMs. and by spool i mean you wont be able to hear the turbo spinning until late in the RPMs. so in essence, do you hear the whine of the turbo spinning right away, or never?
of course if it was working fine before, then you put the green on and immediately had boost problems, it will be obvious what the problem is.
I'll give your bov issue a look... the turbo spooling??? Hmmm.. i'll check that out also.
I was looking at my logs...
with hp actuator....
at around 3589rpm in 3rd gear with tps at 100% it was at .90psi
at 3905 i was at 5psi
at 4364rpm i was at 10psi
at 4800 i was at 15psi
at 5460 i was at 20psi
at 5878 i was at 21psi
with oem actuator and vac disconnected from wga (which should of been spring pressure.)
at full throttle 100%tps 3rd gear i was at -4.30psi
at3740rpm i was at 0.00 psi
at 4315 i was at 5psi
at 5053 i was at 10psi
at 5760 i was at 15psi
at 6583 i was at 18.20 where it held till i let off the throttle at 7291
with hp actuator....
at around 3589rpm in 3rd gear with tps at 100% it was at .90psi
at 3905 i was at 5psi
at 4364rpm i was at 10psi
at 4800 i was at 15psi
at 5460 i was at 20psi
at 5878 i was at 21psi
with oem actuator and vac disconnected from wga (which should of been spring pressure.)
at full throttle 100%tps 3rd gear i was at -4.30psi
at3740rpm i was at 0.00 psi
at 4315 i was at 5psi
at 5053 i was at 10psi
at 5760 i was at 15psi
at 6583 i was at 18.20 where it held till i let off the throttle at 7291
I was looking at my logs...
with hp actuator....
at around 3589rpm in 3rd gear with tps at 100% it was at .90psi
at 3905 i was at 5psi
at 4364rpm i was at 10psi
at 4800 i was at 15psi
at 5460 i was at 20psi
at 5878 i was at 21psi
with oem actuator and vac disconnected from wga (which should of been spring pressure.)
at full throttle 100%tps 3rd gear i was at -4.30psi
at3740rpm i was at 0.00 psi
at 4315 i was at 5psi
at 5053 i was at 10psi
at 5760 i was at 15psi
at 6583 i was at 18.20 where it held till i let off the throttle at 7291
with hp actuator....
at around 3589rpm in 3rd gear with tps at 100% it was at .90psi
at 3905 i was at 5psi
at 4364rpm i was at 10psi
at 4800 i was at 15psi
at 5460 i was at 20psi
at 5878 i was at 21psi
with oem actuator and vac disconnected from wga (which should of been spring pressure.)
at full throttle 100%tps 3rd gear i was at -4.30psi
at3740rpm i was at 0.00 psi
at 4315 i was at 5psi
at 5053 i was at 10psi
at 5760 i was at 15psi
at 6583 i was at 18.20 where it held till i let off the throttle at 7291
-Paul
ok, so it looks like it is really slow to build even 5 psi then... (about 400 rpm). i presume then if you do the turbo sound test, it will sound like it isn't even spooling.
one thing you can try in addition to checking the BOV (at this point its just to rule it out), is to take the wastegate actuator off completely. (or at least disconnect the arm to the wastegate flapper). if you get the same spool characteristics with no WGA at all, you know it is internal. either the puck is broken, or turbo is shot. and one thing, you should have to Pull the WGA arm to get it onto the wastegate flapper pin. that will indicate there is preload on the spring.
one thing you can try in addition to checking the BOV (at this point its just to rule it out), is to take the wastegate actuator off completely. (or at least disconnect the arm to the wastegate flapper). if you get the same spool characteristics with no WGA at all, you know it is internal. either the puck is broken, or turbo is shot. and one thing, you should have to Pull the WGA arm to get it onto the wastegate flapper pin. that will indicate there is preload on the spring.
http://store.forcedperformance.net/m...td-setting.mpg
and call it a day, how many people have to tell you what's wrong before you listen?
and call it a day, how many people have to tell you what's wrong before you listen?
Last edited by cfdfireman1; Dec 13, 2007 at 05:14 AM.
I even put put vac line hot side to the wga and still 18psi
I figured the only way to get unlimited boost would be to disconnect wga arm completely, which I have not done yet..but wouldn't the exhaust push the flapper open?
Also, the flapper arm moves, whether or not the actual flapper moves also I'm not sure..
I guess I'll pull the turbo and see if its just the flapper...
If its a malfunctioning turbo would suck, cuz knowing my luck it is a possibility.
Also the boost characteristics were not like this on the dyno which was approximately 17 nov...., one day i just noticed it.... (not my daily driver)
I pulled the vac line connecting to the bov and I could not blow into the bov.....
also, to make things clear.... (THERE IS PRELOAD ON ARM) OEM WGA turned to the lowest setting (used compressed air to get it up enough to connect the arm to flapper arm (weak man)
Last edited by FastAzzEvo; Dec 12, 2007 at 11:36 AM.
^how much preload doesn't make a difference. if you have to pull the arm up (or in his case use compressed air to push it up), there IS preload on it. if there is preload, it will boost. the spring has more then enough force to hold it shut even at minimal boost levels. he however, is not getting even minimal boost without significant RPM. there is something more to the problem them WGA turnbuckle preload.
also, fastazzevo: having the WGA connected to the wastegate, and no vacuum line hooked up to it means you will have maximum boost (35+psi)
connecting the vacuum line straight from intake manifold or IC pipe means you have wastegate spring pressure (12psi for stock WGA, and 18psi for HP WGA). if you remove the WGA or disconnect the arm from the wastegate, it means the wastegate will always be open (exhaust will easily push it open).
also, fastazzevo: having the WGA connected to the wastegate, and no vacuum line hooked up to it means you will have maximum boost (35+psi)
connecting the vacuum line straight from intake manifold or IC pipe means you have wastegate spring pressure (12psi for stock WGA, and 18psi for HP WGA). if you remove the WGA or disconnect the arm from the wastegate, it means the wastegate will always be open (exhaust will easily push it open).
http://store.forcedperformance.net/m...td-setting.mpg
and call it a day, how many people have to tell you what's wrong before you listen?
and call it a day, how many people have to tell you what's wrong before you listen?
Wow some really good troubleshooting advice being given out here.
Just so you don't think you're crazy. I had an APS SR30 turbo on my old WRX. It performed exactly like you are describing. It was very sensitive to WGA preload. I tried new WGA, MBC's blah blah blah you name it. I removed it, pissed on it & then threw it in a dumpster (remember this was a $1,800 turbo!). I bought a FP EVO3 16g. Solved the problem.
Just so you don't think you're crazy. I had an APS SR30 turbo on my old WRX. It performed exactly like you are describing. It was very sensitive to WGA preload. I tried new WGA, MBC's blah blah blah you name it. I removed it, pissed on it & then threw it in a dumpster (remember this was a $1,800 turbo!). I bought a FP EVO3 16g. Solved the problem.
I'm going to be pulling the hotside on Monday and seeing if I can isolate what the issue is.. If everything still looks good in there. I'll be kind of out of ideas..
I was doing a lil highway driving last night about 80 in 5th, I would punch it and same thing would take around 500rpm's to build 5psi then slowing get up to 18-20ish,,,,
Thanks for everyone's help. I will keep this thread up when I figure out what is going on.......... for now the car will sit..
I was doing a lil highway driving last night about 80 in 5th, I would punch it and same thing would take around 500rpm's to build 5psi then slowing get up to 18-20ish,,,,
Thanks for everyone's help. I will keep this thread up when I figure out what is going on.......... for now the car will sit..