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Old 10-10-2011, 07:21 PM   #1
BK N BLCK
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Hi all,
I just got back from my trip to the dyno. I just flashed my '08 STI to stage 2 + 93 AEM v300 last Friday.

My parts:
Invidia Q300 cbe
Invidia divorced catted dp
AEM cai

That said I was disappointed to see that my dyno number were 259.92 max power and 304.70 max torque. These numbers seem low.... I tried to call the shop back, but I was too late they are closed till 9 tomorrow. I am hoping that the car was in sport mode vice sport sharp and that was the only issue...
The dyno was the dynojet 424xLC2. Does that play into this calculation difference as well? My car seems to be running really well, so I can't see this being a mechanical issue (another shop I called hinted at that). The fella who dynoed the car didn't even make mention of the car having issues while he was "driving" it. I will try to put the dyno sheet up and maybe figure out how to use the active map feature of the accessport and put some up here too. Thank you to anyone who reads this and responds.
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Last edited by BK N BLCK; 10-10-2011 at 07:23 PM. Reason: Add info
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Old 10-10-2011, 07:29 PM   #2
BK N BLCK
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https://docs.google.com/document/pub...uEpxyWSD_zZbiI dyno sheet
https://docs.google.com/spreadsheet/...mc&output=html data log (sorry if it's long) just figured out how to use it.

Last edited by BK N BLCK; 10-10-2011 at 09:02 PM. Reason: more info
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Old 10-11-2011, 10:01 AM   #3
Cobb Tuning
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Quote:
Originally Posted by BK N BLCK View Post
https://docs.google.com/document/pub...uEpxyWSD_zZbiI dyno sheet
https://docs.google.com/spreadsheet/...mc&output=html data log (sorry if it's long) just figured out how to use it.
Dyno numbers can vary wildly from dyno to dyno and even on the same dyno depending on the conditions that day. I would ask the shop what the typical peak HP/torque is for a stock 08+ STI on their dyno. This will give you a ballpark idea of what your gains are.

You really need to put the car under some load in order to see how it is doing via data logging. If you can do so safely, try a 3rd gear wide open throttle (WOT) run from 2000 RPM to near redline (or as high as you are willing to go before redline).

The other thing to check is to make sure you are running the correct map for the AEM intake. Go to "Tune" -> "Show Current Map" and report back what is shown for both the realtime and reflash slots.

Bill
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Old 10-11-2011, 12:09 PM   #4
BK N BLCK
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The shop said they did in fact dyno in sport sharp, and that my car was running a little rich. They said their normal numbers go from 265 to 290ish.
My access port shows I am running the Stage 2 + AEM 93 Octane v300 map.

The shop also asked how long I have been running the map. I told them since last friday.... Does that really make a difference?
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Old 10-11-2011, 12:15 PM   #5
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Quote:
Originally Posted by BK N BLCK View Post
The shop said they did in fact dyno in sport sharp, and that my car was running a little rich. They said their normal numbers go from 265 to 290ish.
My access port shows I am running the Stage 2 + AEM 93 Octane v300 map.

The shop also asked how long I have been running the map. I told them since last friday.... Does that really make a difference?
The main thing when you reflash a map is that you reset the ECU's learned parameters. The primary one here that could impact the dyno run would be the dynamic advance multiplier (DAM). For the 2.5L cars, you want to make sure it has learned up to 1.0 (the max) before doing a run. It generally doesn't take much driving to accomplish this, however.

If you can do so safely, I would do the 3rd gear WOT data log I mentioned in my last post.

Bill
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Old 10-11-2011, 12:28 PM   #6
WhyHelloOfficer
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Quote:
Originally Posted by Cobb Tuning View Post
Dyno numbers can vary wildly from dyno to dyno and even on the same dyno depending on the conditions that day. I would ask the shop what the typical peak HP/torque is for a stock 08+ STI on their dyno. This will give you a ballpark idea of what your gains are.
Exactly this.
The other thing is the conditions while you had your car on the dyno. Read this article and it will put you at ease:
http://www.caranddriver.com/features...ng_-tech_stuff

A dyno is more of a tuning tool than an end-all measuring device. Get some seat time, and take your car to the track. Your trap speeds will give you a much better gauge of the power your car is making.
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Old 10-11-2011, 12:50 PM   #7
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I will try that 3rd gear run if I can get a clear stretch of road somewhere, and no johnny laws around. How do I check that DAM calculation? I am very new to this forced induction/tuning thing.
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Old 10-11-2011, 01:11 PM   #8
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The DAM will be in the logs, but you can also view it live via the AccessPORT using the "Monitors" -> "Live Data" function. Just make sure it is up to 1.0 before starting your run.

Bill
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Old 10-11-2011, 02:00 PM   #9
BK N BLCK
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I got a run in I just need to get home I am stuck at carmax getting my paint buffed out.
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Old 10-11-2011, 03:55 PM   #10
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https://docs.google.com/spreadsheet/...1E&output=html

STI 3rd gear WOT... I hope this helps.
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Old 10-11-2011, 04:18 PM   #11
Cobb Tuning
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Quote:
Originally Posted by BK N BLCK View Post
https://docs.google.com/spreadsheet/...1E&output=html

STI 3rd gear WOT... I hope this helps.
It appears you have a boost leak. This would explain running rich (per dyno), more extreme negative long-term fuel trims, as well as the unrealistic airflow/load you are seeing in that log for your mods.

I would get a pressure or smoke test done of the intake tract.

Bill
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Old 10-11-2011, 04:26 PM   #12
BK N BLCK
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Is this something I can do on my own? I am a nuclear machinist's mate in the Navy and I have done smoke tests at work. I just don't know of anywhere outside of work to obtain a smoke test seeing as how I don't use cigarettes lol. Is this something that can be easily remedied? New hoses/clamps etc..?
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Old 10-11-2011, 04:38 PM   #13
Cobb Tuning
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Originally Posted by BK N BLCK View Post
Is this something I can do on my own? I am a nuclear machinist's mate in the Navy and I have done smoke tests at work. I just don't know of anywhere outside of work to obtain a smoke test seeing as how I don't use cigarettes lol. Is this something that can be easily remedied? New hoses/clamps etc..?
It is pretty straightforward to do a pressure test of the intake tract. Do a search here on Nasioc for "DIY pressure test" - more than several guys have write-ups on this. Otherwise, some shops can usually do one for you (or a smoke test).

Generally, fixing a boost leak is not going to be too difficult, depending on where the leak is.

Bill
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Old 10-11-2011, 04:44 PM   #14
BK N BLCK
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Thank you I will get to work on this!
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