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01-21-2009, 10:45 AM | #1 |
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Member#: 103340
Join Date: Dec 2005
Location: Canada
Vehicle:1992 RHD WRX |
SZ55 STI wont hit target boost, not EVEN CLOSE!
ok sooo heres some back gorund
Bought an SZ55 turbocharger deadbolt rebuilt it, sent it to me. I broke it in, never hitting more then .5 bar. Now for some fun, nope guess not, car refused to make more then 7-8psi (its suppose to be 21psi) WELL ****! So i thought... hmmm maybe the map isnt set up for 21 psi like its suppose to be. Looked into it.. it is set up for it. Weird i thought, but decided to FORCE it to make 21 psi by sticking a manual boost controller in line... HOT DAMN! we're in business now. The thing went like hell and scared the **** out of me... but whats this... slowly it stopped making the boost pressure i wanted it too...interesting... and when it did make the pressure, it didnt feel quick... So ok i thought... maybe i have a vacuum leak... nope. Maybe my boost controller is a POS (even though it IS turbosmart) so i took that out of line... yup theres the 7-8psi i again but nothing more. I ran the line complelely off the waste gate and turbo... STILL only 7-8 psi.... (this broke off my gfs TD04 on her WRX before and it went to like 22 psi so i thought i might be worth a try) So im out of ideas... the turbo still spools great and spins freely just isnt making the right power.. BTW... i dont have the restrictor pill in the line anymore which i think COULD be the problem but wouldnt taking the line right off the wastegate FIX that issue. My second guess is maybe the wastegate actuator is broken or maybe just one tight enough.. PLEASE HELP!
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01-21-2009, 11:49 AM | #2 |
Scooby Specialist
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Vehicle:1992 RHD WRX |
just borrowed the restrictor pill from my GF's WRX and it didnt help it at all..
EDIT: Also just turned of the tightness on the wastegate arm... NOTHING Last edited by Cstmboxermotorsports; 01-21-2009 at 12:13 PM. |
01-21-2009, 12:11 PM | #3 | |
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I had kind of the same problem and this is what my tuner recommended
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01-21-2009, 12:20 PM | #4 |
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You DID go get a protune for this, right?
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01-21-2009, 12:54 PM | #5 |
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01-21-2009, 01:12 PM | #6 |
Scooby Specialist
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Join Date: Dec 2005
Location: Canada
Vehicle:1992 RHD WRX |
double post
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01-21-2009, 01:14 PM | #7 |
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Join Date: Dec 2005
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No i HAVENT gotten a protune for this yet. Its only been on the road for like a week and it was basically spent breaking it in.
I still have to get it inspected at Canadian tire before i can put my front mount intercooler on, I only have a 02 WRX TMIC on it now. I dont want to protune until i have the FMIC on. So i did what u said and i unhooked the line... it only SLIGHLY increased the amount of boost (9psi). So it must be a pre-turbo exhaust leak then? |
01-21-2009, 02:03 PM | #8 |
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you're trying to spool your sz55 to 21psi with an 02 wrx tmic???
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01-21-2009, 03:05 PM | #9 |
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I was going to leave this train-wreck alone...
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01-21-2009, 03:37 PM | #10 |
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01-21-2009, 03:40 PM | #11 |
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Join Date: Dec 2005
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Vehicle:1992 RHD WRX |
Wellll i pulled the codes off the ECU now that i went and picked up an accessport from the ladys house.
I have P0301 p0302 P0304 ????? I know the first 3 are misfires as i had gotten them before on my VF22 EJ207 swapped GC8. But the car doesnt idle like its misfiring, as well it has consistant power through-out the RPM range, it just isnt making more then 7-8psi, and it seems to take a while to spool that (4500rpm) I went to Midas and had them weld my headers where they connect to each other (thought they might be leaking there) as well as had them check for other leaks. Nothing. yes im running the TMIC... The car is my daily driver and i needed it mobile. I dont beat on it (although it has seen full boost once or twice) But I am generally conservative with it. I cant cut my bumper beam all to hell to put the front mount on until i get it inspected and I need things fixed and running properly before i can do that. |
01-21-2009, 03:58 PM | #12 | |
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01-21-2009, 04:05 PM | #13 | |
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Quote:
as well i only turned the BOOST up with the manual boost controller to hit the PROPER target boost. Its not that the map is set for 12psi and im running it to 21psi. At 21 psi my AFR was still 11.2-11.4. I have an AEM wideband. Explain WHY the intercooler would KILL it? You can run a straight pipe from the turbo to the throttle body with a BPV bolted to it and it would still be fine. |
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01-21-2009, 04:06 PM | #14 |
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Best reading all day!
BTW, a motor can sound and feel perfectly healthy and still be down on compression and not hit target boost. |
01-21-2009, 04:12 PM | #15 | |
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Quote:
Because the wrx intercooler is way too damn small for a sz55. If you are not hitting target boost why don't you check for leaks and other things. Don't just get a manual boost controller and turn it up. Seriously, what are you doing? You should've just gave me your setup. You're just going to blow your motor and waste money. I don't care if I get points, but you are a ****ing idiot. |
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01-21-2009, 04:14 PM | #16 |
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reset your ecu and pray to god your misfires didn't make you lose compression or bend a valve or that you didn't lose a ring land
go see your tuner/mechanic and stop messing with your car, you are in over your head reset your ecu first, but now you have these misfire problems; idk man you are in need of some serious assistance please don't mess up that awesome motor you've got, that would be a total shame |
01-21-2009, 04:16 PM | #17 | |
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Quote:
I know its not SAFE but its not like i was kicking the **** out of it. I hit full boost a few times (like 5). I checked for boost leaks already btw. |
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01-21-2009, 04:17 PM | #18 | |
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Quote:
do you honestly think that 02 wrx tmic flows enough air for your sz55? you should do what i bolded. you'll probably hit target boost since the small tmic will no longer restrict airflow going into the intake manifold. |
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01-21-2009, 04:19 PM | #19 | |
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01-21-2009, 04:21 PM | #20 | |
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Quote:
my gf has an APS top mount on her car, ill steal that when she gets over here... see if that clears stuff up. Thanks for the help i appreciate it |
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01-21-2009, 04:32 PM | #21 |
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01-21-2009, 04:38 PM | #22 |
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atleast this thread gave me a good laugh
at first it had fail written all over it |
01-21-2009, 05:02 PM | #23 |
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01-21-2009, 06:09 PM | #24 | |
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Quote:
That being said, I'm going to finish getting this map tuned before i play with the car anymore. I'm only 22 and everything I have ever earned has gone into my cars and I probably would have jumped off a bridge if i blew this up. Thanks so much, and everyone, I know it was dumb to boost on a basemap, but thanks for all the replies anyway, they really did help me trouble shoot even though you were being sarcastic in some cases. I hope this will help anyone else who does something this dumb. |
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01-21-2009, 06:37 PM | #25 |
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