i have a 2005 STI with Helix catless TBE DP wrapped, Gruppe-s headers coated, Titek up-pipe coated, AP ver2, 255 fuel pump, GP moto silencer delete, After MAF hose, and a couple of other silicone hoses. i am only making 293 FT-Lbs @ 3750 RPM and 249 HP @ 5750 RPM. i also know that my turbo is cracked so i am wondering what i should do. get a new/used stock VF39/VF43 or go for a 18g/20g but the thing is i dont have alot of money since its around the holidays. let me know your opinion on my problem. thanks for your thoughts.

i would say get a new turbo.. buy a used turbo for now.. u can always sell it later on if u want to go bigger.. just dont drive around on a cracked turbo!

what kinda dyno was this on?

it was at GST so the Mustang dyno

i have a friend that had his car tuned there.. he is a cobb stage 2 05 sti.... he pulled 260 hp and 290 tq!

249hp is pretty low for a STI if you ask me.... Anyone ells?

ya... it is

It is pretty low but concidering the car would only make 11psi from 5800rpms on it's surprising it made that much.

Mike

thanks mike i will let you know what im doing about the issue. good luck with the race and have fun.

Hey, I think I met you once, sold you an sti trunk if I remember? Our cars looked basically the same (05 White STI w/Gold BBS). I'm making 254hp and 292tq on that same dyno with a turbo back exhaust on my sti. Your best bet would probably be to get a used turbo for the time being then upgrade down the road. Cheaper and you can always just resell the turbo when you pick up a new one.

hi everyone,well i just got tuned too ,i have turboXs TBE and air intake i got 290 awh 350tq,anything else stock
http://www.i-club.com/forums/attachment.php?attachmentid=60898&d=1196995537[/url]

hi everyone,well i just got tuned too ,i have turboXs TBE and air intake i got 290 awh 350tq,anything else stock
http://www.i-club.com/forums/attachment.php?attachmentid=60898&d=1196995537[/url]
two different kind of dynos homie, but good ****.

have you checked for boost leaks? Are you running the stock boost control solenoid? I doubt it would be the solenoid, and if it were I am sure Mike would know, but jsut throwing it out there :)

Since you have headers, an uppipe, and some replaced silicone hoses, I HIGHLY recommend getting under your car and rechecking all pre turbo connections. Hell, check post turbo as well, since you probably have to unbolt the downpipe to get to the uppipe. Also check for cracked headers...they are gruppe-S after all

Do you have what sounds like an exhaust leak? To be held at 11 psi would take a big leak, but ya never know. I am sure it would push more, but not reliable boost.

Have you actually seen the crack? I have trouble holding boost as well (although not as bad as you it seems) so I also thought my turbo was cracked. I removed my DP and looked and it was not cracked at all. I diagnosed it to just be my OEM WG actuator/BCS after I played around with a helper spring VERY carefully just to figure out what was going on. I'll loan you my helper spring if you want to try it. You WGDCs are probably 90.2 (100%) so you'll know right away if your BCS is causing/contributing to the problem.

i would say get a new turbo.. buy a used turbo for now.. u can always sell it later on if u want to go bigger.. just dont drive around on a cracked turbo!

Is there something wrong with driving around with a cracked turbo?

http://www.gstmotorsports.com/store/index.php?main_page=index&cPath=71_82_159_337


Anyone one of those would work;)

http://www.gstmotorsports.com/store/index.php?main_page=index&cPath=71_82_159_337


Anyone one of those would work;)
good call kiddo!

Generally a crack in the exhaust housing won't cause boost to drop like that.
Is your wastegate ported? An over-ported wastegate can cause this. A boost leak or a pre-turbo exhaust leak could also do it. Finally the stock boost control solenoid can become insufficient to run appropriate boost levels, especially if the wastegate was ported when it didn't need to be.

Thanks

a buddy of mine's sti had a crack in the exhaust housing, wouldn't hold more than 12 lbs, then he bought another one, cracked too, wouldn't hold more than 16 lbs...

there is a crack at my wastgate and were the up-pipe is and its pretty big on the up-pipe side.

that'll do it, new turbo time...

i think i am going to get a credit card and just do a FP green upgrade cuz i have a feeling that warranty/my boss wont cover it.

i took of my turbo today at work and there its a big ass crack from the wastegate all they way around to the upippe part of the turbo. so its gunna go warranty. i am so happy

i have a 2005 STI with Helix catless TBE DP wrapped, Gruppe-s headers coated, Titek up-pipe coated, AP ver2, 255 fuel pump, GP moto silencer delete, After MAF hose, and a couple of other silicone hoses. so my first tune was all bad since i had a cracked turbo so i got the VF39 warrentyed. I went back today to GST. here are my numbers from the first tune compared to my tune today. base run is my first tune( on right12/6/07) and test run is today 12/20/07 on the left.

http://i32.photobucket.com/albums/d49/iriezak/dynoresults.jpg

so with my new turbo i gained 23.1 whp and 28.4 FT-lbs torque. i can really feel the differance in the power then before when i had the cracked turbo. i am happy with everything that GST(mike and greg) has done for me to get my car to this point.

Glad it all worked out for you Zak, makes a difference having a turbo that doesn't have a crack from the wastegate port all the way to the uppipe flange.

Mike

Nice #'s Zak, pick me up after work for a ride:D

+1 for GST:RockOn - not mine: