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Old 09-21-2012, 09:58 AM   #51
Tripintaz
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Still sounds like your tune or your MBC is setup wrong. If air was rushing past the rings like a hurricane you would be burning quite a bit of oil. It does not hurt to perform a compression test just to make sure. But I still think you have something set up wrong.
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Old 09-21-2012, 10:40 AM   #52
hardhitter_alert
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The only thing I can really tune is the AFR and timing. With the hybrid boost control the WGDC is set to 100% at WOT so the MBC takes over.
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Old 09-21-2012, 11:11 AM   #53
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Why not just suck it up it and take it to a professional. You're not tuning a mustang anymore. Take it there, and ask him what you did wrong and where to correct NEXT time.
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Old 09-21-2012, 11:51 AM   #54
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I don't feel like wasting a ton of money taking it somewhere. When I had my Mustang tuned by a professional it drove terribly and that's what got me started in tuning in the first place. I tuned it a lot better myself and I didn't have to pay anyone. Every time I added an upgrade I didn't have to pay to get it tuned again.
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Old 09-21-2012, 12:55 PM   #55
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Quote:
Originally Posted by hardhitter_alert View Post
I don't feel like wasting a ton of money taking it somewhere. When I had my Mustang tuned by a professional it drove terribly and that's what got me started in tuning in the first place. I tuned it a lot better myself and I didn't have to pay anyone. Every time I added an upgrade I didn't have to pay to get it tuned again.

It sure sounds like you aren't having the same luck with your subaru though. These cars are extremely fickle when it comes to tuning, they really need a special touch, and experience to make them run like they should. There is ALOT more to tune then simply AFRs and boost. MAF scaling needs to be correct, you need the correct injector latency, good AVCS, correct turbo dynamics, along with those boost and fueling tables. If you need some tuning advice (which in my opinion is the root issue, especially if you can't find any mechanical issues) then I'd head over to the romraider forums. You will find much more information and better advice there.

Also a quality e-tune only runs you about $200, which is an extremly small investment on your car that you've already put much more into. There are more then a handful of very reputible ones here. Go check the proven power bragging section for them.
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Old 09-21-2012, 01:05 PM   #56
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Originally Posted by Source,LLC View Post
It sure sounds like you aren't having the same luck with your subaru though. These cars are extremely fickle when it comes to tuning, they really need a special touch, and experience to make them run like they should. There is ALOT more to tune then simply AFRs and boost. MAF scaling needs to be correct, you need the correct injector latency, good AVCS, correct turbo dynamics, along with those boost and fueling tables. If you need some tuning advice (which in my opinion is the root issue, especially if you can't find any mechanical issues) then I'd head over to the romraider forums. You will find much more information and better advice there.

Also a quality e-tune only runs you about $200, which is an extremly small investment on your car that you've already put much more into. There are more then a handful of very reputible ones here. Go check the proven power bragging section for them.
I have been to the romraider forums and I know that there is more to a tune than what I have mentioned but since the maf scaling, injectors, ect are already correct I am talking about the things that can make a difference to spool time. The tune is never going to be correct if there are mechanical issues so I want to make sure that everything is right before I consider tuning.
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Old 09-21-2012, 01:13 PM   #57
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Here are the exhaust leak locations that I have found. I used brand new gaskets when I installed the header and I torqued the bolts to spec. Should I tighten them more? How should I solve the leaks at the header joints? One of the bolts is actually missing. The joint at the uppipe does not appear to be leaking but the it clearly is not a flat seal. It is bowed out slightly.







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Old 09-21-2012, 01:24 PM   #58
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I've seen plenty of people just have those slip joints in your headers. That Will take care of that.
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Old 09-21-2012, 01:31 PM   #59
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I've seen plenty of people just have those slip joints in your headers. That Will take care of that.
What will?
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Old 09-21-2012, 03:16 PM   #60
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^^^^^Get that **** off of there man.........those leaks and the quality header youve got there are gonna equal many problems. I had a similar header to yours.......lasted about 10 miles before it started runnin rough.....boostin less and less......i inspected my header joints and what not. Lets just say after i saw the obvious sooting at what appeared to be at every connection on that header...even at the head, i swapped the oem cast manifold back on and am sooooo satisfied.
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Old 09-21-2012, 03:42 PM   #61
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Well I was able to tighten the bolts at the heads to 55 ft-lbs so they are a little bit tighter. The problem is definitely at the slip joints. Can I just get them welded up? I could feel the air blowing out a decent amount.
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Old 09-21-2012, 04:41 PM   #62
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Haha I was thinking faster than typing. I meant to say people have the slip joints welded so they won't leak there. My bad.
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Old 09-21-2012, 04:47 PM   #63
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What POS header is that? I would be livid if I bought a header and it fit like that.
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Old 09-21-2012, 05:00 PM   #64
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Quote:
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Haha I was thinking faster than typing. I meant to say people have the slip joints welded so they won't leak there. My bad.
I just had them welded and it doesn't seem to be leaking now.

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What POS header is that? I would be livid if I bought a header and it fit like that.
Perrin
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Old 09-21-2012, 05:26 PM   #65
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Wow and that increased the spool by 0 RPM
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Old 09-21-2012, 05:47 PM   #66
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Did you replace all the exhaust gaskets? When you get a leak like you're showing you must replace the gaskets, just tightening down the bolts won't so it.

An exhaust leak will certainly increase boost lag, even a very small one.
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Old 09-21-2012, 05:54 PM   #67
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Do I didn't replace the gaskets. They were expensive double thick ones and the leaks seem to be gone now.
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Old 09-21-2012, 05:54 PM   #68
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Quote:
Originally Posted by hardhitter_alert

I just had them welded and it doesn't seem to be leaking now.

Perrin
Real perrin or a copy?

If real send them pictures. That's crap.
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Old 09-21-2012, 06:05 PM   #69
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Do the copies actually say Perrin on them?
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Old 09-21-2012, 06:38 PM   #70
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Is it possible one of the boost controllers is not working correctly?
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Old 09-21-2012, 06:47 PM   #71
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A bad boost controller won't delay initial spool, but it might increase the amount of time it takes for the boost to go from wastegate pressure to target boost. If you notice it hitting wastegate pressure very quickly, then taking forever to go from there to target boost, that's when you would look at the boost controllers. If it takes forever just to get to wastegate pressure then that's not the issue.
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Old 09-21-2012, 07:10 PM   #72
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How would I know what the wastegate pressure is? I am commanding 100% wastegate duty cycle in the tune at WOT and letting the MBC take over. Target boost is higher than actual.
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Old 09-21-2012, 07:38 PM   #73
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The turbo specs should say. It's usually around 7-15 psi
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Old 09-21-2012, 09:15 PM   #74
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1 Bar / 14.7 PSI
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Old 09-21-2012, 09:23 PM   #75
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I have tried adding timing.. up to 8 degrees advance with no knocking and the spool is even slower.
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