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Don's 08 STI. STI Hatchback/Wagon or bust!
Don's 08 STI. STI Hatchback/Wagon or bust!
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Old 04-15-16, 10:25 PM   #301
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

Right now, my set up is just right. Spool up is instantaneous with E85, 9.0:1 forged pistons, Killer B 2 bolt + Perrin Performance Big Tube uppipe. Slight lag with 91. I'm glad I went with the Tomei M8265. If I were to do it again, I would have gone straight to the Killer B with the v banded up pipe. This header goes well with the spool characteristics of the M8265. Very strong midrange and top end power.
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Old 04-18-16, 03:28 AM   #302
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

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Originally Posted by STIGR-Wagon-Dad View Post
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While on my way home from Vegas......


'Tis but a flesh wound!
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Old 04-19-16, 02:42 PM   #303
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

Did you go with the big-tube up pipe as opposed to the "regular" only due to the aftermarket turbo? What were your impressions with the build quality prior to install and what are your thoughts so far?

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Old 04-19-16, 03:18 PM   #304
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

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Originally Posted by CSC View Post
Did you go with the big-tube up pipe as opposed to the "regular" only due to the aftermarket turbo? What were your impressions with the build quality prior to install and what are your thoughts so far?
I went with the big tube to match the pipe size of the manifold collector and turbine inlet. The welds are nice and the flanges are thick. It was a tight fit as it does not have a flex pipe, so every bolt and nut had to be installed loosely, lined up, and then tightened down. I did see quicker spool and improved response from the engine and turbo. It felt laggy and had less response on the grimmspeed before it fell apart. The grimmspeed uppipe was a great match with the grimmspeed ported exhaust manifold when I had that set up years ago with the stock VF48.
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Old 04-19-16, 03:23 PM   #305
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

Awesome thank you so much for the response. Really love your build! Def an inspiration.
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Old 04-22-16, 07:26 PM   #306
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

I had oscillating cold start idle. I replaced the plastic tee next to the turbo inlet and it fixed it. Now my fuel correction has gone more negative, as low as -17%. Vacuum/boost leak problems on this car is crazy, even though there are not many vacuum hoses on the engine. I used a brass tee from Nitrous Express.
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Old 04-23-16, 03:09 PM   #307
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

New belt cover from Forester STI and replaced STI emblem on grill.
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Old 04-24-16, 11:05 AM   #308
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

Perhaps my MAF is going bad. My MAF g/s sits normally around a little over 3, it has doubled. The car died in the middle of traffic and the MAF g/s jumped up to over 10 at idle. I popped the hood open and wiggled the wire harness, it started to run normal. I pull over to the next street over and reset the ecu. Now, instead of pulling fuel from -15% at temp, it now adds fuel up to 10% at temp. Power is back but I am trying to set up an appointment to see if the tune is good for the new up pipe I had replaced.
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Old 04-27-16, 05:09 PM   #309
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

Replaced the MAF. Numbers off the fuel corrections are more in line of when I got it off the dyno.
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Old 05-01-16, 08:40 PM   #310
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

The power and response 3500 and up is great. I'm okay at this power level. I'm really enjoying the car as it is fun to drive. Now for improving braking and aero.
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