2008 STI Catted turboback stock vs. tuned file

[BG @ BrenTuning]

Stock car at 25k with nothing crazy on it other then 3" catted maddad prototype turboback, stock intake and 25k old filter etc.

Runs were done within 2 minutes of each other, on same strip of road. Only difference is we started the stock run sooner so the lines draw sooner. There are no low end losses.

Notes: stock map with a turboback, had a heavy flat spot between 3-4k rpms, pulled 2 degrees of timing globally - and peaked out at 16.25 pounds of boost. (map calls for 13.5-14 depending on rpm)

Tuned map at 20.5psi, 10.8 afr, and conservative advance. It made lots of power with the cam timing changes.

Large gains everywhere!

Stock vs. Tuned

http://img.photobucket.com/albums/v412/brenwrx/2008stage2comparisonnn.jpg

[DHGurs]

Nice gains! It's interesting to compare this to mine.

1. His torque peaks lower than mine, 'cause of the catback maybe?

2. Did you notice any other differences between the SE and this car?

[BG @ BrenTuning]

His torque peaks lower, can be dependent on a few things - mostly when i started the run. However I ran lower boost on this car then yours so it will peak lower as a result of that.

Difference between the SE and this? Softer suspension that made it easier to tune without getting a headache :)

[Phalanx]

This was my car... more than happy with Brens work. Im sure Ill be back soon. Already have my head spinning about where to go next, haha.

Heres the dyno pulls from when I got the turboback installed:
http://www.daddysscp.com/v/vspfiles/forumpics/dyno_stock_stgii.jpg

Things to note is that the above is the difference from bone stock to 3" tirboback + cobb stage 2 map, gains of 20whp and 70wtq.
With Brens tune, the baseline was the stock tune + 3" turboback vs 3" turboback+brentune, gains of 45whp and 70wtq

While the final numbers are roughly the same, keeping in mind that there are variences in the way data was gathered, its still safe to say that the overall gains from bone stock to 3" turboback+brentune are actually more than 40hp/70tq.... in otherwords, nothing but a nice big :D on my face

[BG @ BrenTuning]

Just realized something.

Your graph says stock map and stock exhaust. Our delta was from exhaust + stock (higher delta then stock exhaust) to exhaust + tune.

With your exhaust I'd expect to pick up a good 25whp untuned, let alone the flow letting it peak 16.2 psi that the stock exhaust wouldn't do. :)

[Phalanx]

Just realized something.

Your graph says stock map and stock exhaust. Our delta was from exhaust + stock (higher delta then stock exhaust) to exhaust + tune.

With your exhaust I'd expect to pick up a good 25whp untuned, let alone the flow letting it peak 16.2 psi that the stock exhaust wouldn't do. :)
Thats exactly what I was trying to say with my previous post, haha. Even though the peak #s are similar, I know that the gains were more than that because we arent seeing the delta from stock+stock map to turboback+stock map.

Perfect example of why dynos are good to see what gains were made and where they were made and not for trying to actually read peak #s

[BG @ BrenTuning]

I looked quickly at your graph and assumed it was tuned vs not tuned with exhaust on it. That means the delta is MUCH greater :)

[Phalanx]

I looked quickly at your graph and assumed it was tuned vs not tuned with exhaust on it. That means the delta is MUCH greater :)
We'll see what the track times look like once I get a chance to take it up there... assuming that the guy behind the wheel can drive well enough

[BG @ BrenTuning]

Stock car at 25k with nothing crazy on it other then 3" catted maddad prototype turboback, stock intake and 25k old filter etc.

Runs were done within 2 minutes of each other, on same strip of road. Only difference is we started the stock run sooner so the lines draw sooner. There are no low end losses.

Notes: stock map with a turboback, had a heavy flat spot between 3-4k rpms, pulled 2 degrees of timing globally - and peaked out at 16.25 pounds of boost. (map calls for 13.5-14 depending on rpm)

Tuned map at 20.5psi, 10.8 afr, and conservative advance. It made lots of power with the cam timing changes.

Large gains everywhere!

Stock vs. Tuned

http://img.photobucket.com/albums/v412/brenwrx/2008stage2comparisonnn.jpg


Same setup, same AFR/Peak BOOST and very similar timing. With addition of grimmspeed solenoid (more boost to redline) and a turbo xs cai in very unfavorable conditions today we got: Look at the difference in curve, so much fatter and power everywhere

http://img.photobucket.com/albums/v412/brenwrx/2008STiintakeGS.jpg

[etaks99rs]

Holy crap! That is a huge difference!

[BG @ BrenTuning]

EWG and that HP would nice and flat to redline :)

Oh, and I forgot to add, this map although very similar to the old almost identical but has more aggressive AVCS mapping

[Phalanx]

Thanks again, Bren... holding more power up top = phenomenal

any chance of getting the before/after graphs overlayed? i would imagine not, unless you happen to still have the datalogged values

[Taiden]

What are you using for street dyno software?

[Phalanx]

What are you using for street dyno software?
he uses something called 'Airboy'

heres what I was able to get by overlaying the graphs myself...

http://i43.photobucket.com/albums/e366/lPhaLanXl/2008STiintakeGScopy.jpg

[BG @ BrenTuning]

the gains down low are obvious even though the runs don't start the same.

boost sooner + aggressive avcs = win

[BG @ BrenTuning]

What are you using for street dyno software?

airboy, very popular in the subaru world

and reads +/- 3hp to our local dyno here. HP and TQ are almost spot on.