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Old 08-15-2008, 12:37 PM   #1
J. Steinbeck
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Default Basic turbo upgrade car... just had it tuned!

Hello everyone....

I'll admit I'm posting this with a good amount of trepidation, as I know that compared to a lot of the cars I see in this area, I'm bringing a sharp stick to gun fight.

Anyway.... I finally managed to get my car assembled (my hands still hurt), and my tune completed yesterday. It's not a monster power setup, and it was tuned on a dyno that has a reputation for reading high. Regardless, I thought it was a nice looking power curve, and my tuner was absolutely awesome to work with. I didn't think it would hurt to share what I have. I like to think that, even if the dyno was high, I could now put down 250+ on most dynos out there.

My modifications are as follows (2004 WRX Wagon, stock 2.0):

-Deadbolt TDO5h 16G with ported and coated exhaust side
-DW 650 injectors
-Walbro pump
-STi uppipe
-STi USDM topmount intercooler
-Gimmick Motorsports turbo inlet and aftermaf hose
-Mach 5 motorsports boost solonoid
-GP moto silencer delete
-K&N panel filter
-Titek catted downpipe
-Borla XR-1 full 3 inch catback

I think that pretty much covers all that matters.

Here's the dyno reading (obviously the higher lines are from the final run):



The car is an absolute ball to drive... not sure what kind of strip times it would turn in, but I can't recall having this much fun in a daily driver street car in a while.

I haven't really said a whole lot about my own car since I've been on this forum- thought this might be a chance to show a little bit of what I've managed to put together.
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Last edited by J. Steinbeck; 08-15-2008 at 01:01 PM.
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Old 08-15-2008, 12:45 PM   #2
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Looks good man! I know how you feel . Is it just me, or does the torque curve seem to fall off a little quickly? I don't have a graph of my own, just road-tuning, so I'm only curious. Where do you see full boost?
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Old 08-15-2008, 01:00 PM   #3
J. Steinbeck
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Yeah.. I just received the graph today, and I was a little amused by how the torque dives off... but then again, I was surprised that it made as much initial torque as it did. Based on what I've seen, 2.0 motors that manage to peak more torque than horsepower aren't the norm. Maybe the sharp peak and fall are the result of having a ported, but still relatively small turbo. In other words, I essentially have no idea.

As for peak boost, I *think* I'm seeing it top out right near 4,000 rpm. I just got the car back yesterday, and haven't quite taken a solid note of that yet. When I get to about 3,500 rpm under a full throttle application, though, the boost gauge is really starting to swing hard. Peak boost is supposed to be right around 19/19.5 psi.

Overall, the powerband feels great! Once it spools, it is a smooth, hard charge all the way to the redline.
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Old 08-15-2008, 01:05 PM   #4
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on 100 right?
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Old 08-15-2008, 01:09 PM   #5
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Quote:
Originally Posted by J. Steinbeck View Post
Hello everyone....

I'll admit I'm posting this with a good amount of trepidation, as I know that compared to a lot of the cars I see in this area, I'm bringing a sharp stick to gun fight.

Ha, atleast it's a sharp stick! That looks about right though. It might be a little high reading but either way thats nice torque out of a 2.0.

I'm sure its a blast to drive. Can't beat the feeling of a good tune with some added power. Enjoy!
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Old 08-15-2008, 01:29 PM   #6
clbd39
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wow that looks like it pulls quick, good job! enjoy it!
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Old 08-15-2008, 02:12 PM   #7
mongoosaroo
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The Torque Falling Off Is Normal On The Ol' 2.0. Great Numbers For A 16g. Have Fun W/ It!
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Old 08-15-2008, 03:05 PM   #8
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Quote:
Originally Posted by J. Steinbeck View Post
As for peak boost, I *think* I'm seeing it top out right near 4,000 rpm. I just got the car back yesterday, and haven't quite taken a solid note of that yet. When I get to about 3,500 rpm under a full throttle application, though, the boost gauge is really starting to swing hard. Peak boost is supposed to be right around 19/19.5 psi.
Needs moar boost. Seriously, 19psi is nothing for a 16g.
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Old 08-15-2008, 03:09 PM   #9
nicewrx
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nice numbers
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Old 08-15-2008, 04:00 PM   #10
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Quote:
Originally Posted by Audiosavvy View Post
Is it just me, or does the torque curve seem to fall off a little quickly? I don't have a graph of my own, just road-tuning, so I'm only curious. Where do you see full boost?
Its just you....a 100 ft*lb drop from peak to redline is normal....

It really just depends on how much you peak the boost to at low rpm. This 16g is only going to 19psi.....mine which goes up to 23-24psi will have a 150 ft*lbs drop from peak to redline.

just like this 2008 wrx

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Old 08-15-2008, 04:05 PM   #11
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Quote:
Originally Posted by Phatron View Post
Its just you....a 100 ft*lb drop from peak to redline is normal....

Ok thanks. For some reason I just expected a more linear torque-band. That's why I asked , thanks. Sorry for the threadjack
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Old 08-15-2008, 05:04 PM   #12
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You can make a flat torque curve by decreasing the boost at lower rpm but you are leaving tons of lowend power on the table.
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Old 08-15-2008, 06:12 PM   #13
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Congrats!
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Old 08-15-2008, 06:22 PM   #14
Steve.804
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Yeah the turbo can only move but so much air at high RPM. In other words, It would be tough to increase the torque at redline by just simply adding boost. Peak tq sure, but it will fall off to the same point because of its size. Nice job on the turbo upgrade. These cars really start to wake up once you take off that tiny TD04
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Old 08-15-2008, 08:08 PM   #15
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I wouldn't worry about the torque dropoff - looking at the HP curve even though that drops off you've still got 90% of your power at redline


Remember, horsepower and the width of the horsepower powerband moves cars - torque is what salesmen and rednecks who never took basic physics think moves cars
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Old 08-15-2008, 11:11 PM   #16
J. Steinbeck
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Quote:
Originally Posted by 03_Impreza_Al View Post
on 100 right?
Surprisingly enough, it was on regular ol' 93 octane.


I really appreciate everyone's input. There's enough of my blood and sweat in the engine bay that I can reserve the right to brag a little, right? (On second thought, that sounded kind of disgusting, didn't it?)


I wasn't really worried about the torque thing, as all I really care about is the powerband shoving me back in the driver's seat. I'm glad it was discussed, though, as I've never really thought at length about the biggest difference in the way the modded 2.0 and 2.5 models deliver their power, and I guess my graph outlines it pretty well.

Down the road I might consider switching to a front mount and upping boost a little more, but for the time being I feel like I have a nice, reliable, low lag tune that will keep me entertained for a while. My tuner mentioned that I was one of the highest dynoing 2.0 motors with a top mount and pump gas that he has had, so that left me feeling pretty good. In all honesty, the only thing that I might regret just slightly at this point is not doing ported exhaust manifolds and TGV deletes. I wonder if those two things might have pushed me to 300 on that particular dyno.

Regardless, it will be really interesting to see if my gear box gets along with my existing setup in the long run. I think I will be okay, but we'll see. If the gears ever do break, I guess I'll just have to remedy the issue with a 6 speed and see if I can put my 650s to work on a larger turbo. As of right now they are barely hitting 70% IDCs.

Today I actually found myself looking for excuses to run errands. You should have seen my wife's face when I volunteered to take her to the Macy's across town.

Last edited by J. Steinbeck; 08-15-2008 at 11:20 PM.
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Old 08-16-2008, 01:35 AM   #17
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wagons ftw buddy. nice.
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Old 08-19-2008, 03:45 PM   #18
Wagon Of Fury
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Hey Jonathan - Nice numbers from my old turbo ! At least 30whp/35wtrq higher than mine when I had STI pinks. I knew the car had more in it than that !

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Old 08-20-2008, 10:07 AM   #19
J. Steinbeck
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Quote:
Originally Posted by Wagon Of Fury View Post
Hey Jonathan - Nice numbers from my old turbo ! At least 30whp/35wtrq higher than mine when I had STI pinks. I knew the car had more in it than that !

Hey!!! How's everything going!?!

Yes... I've gotta say- your turbo is the best addition I've made to my car yet. Going with the DW 650s was my second best move; my tuner seemed very happy with the combination. I'm came sooooooo close to getting pinks, but I kept messing around with an online fuel calculator, and no matter how I cut it, if I wanted to get near my power goals the pinks just fell a little short. The only downside was that getting EM sorted out for the short break-in period on the rebuilt turbo was a little bit a of pain since Cobb didn't have an OTS map for my setup, and I didn't have a cable handy for properly data logging my tuner's limp map. In the end, though, everything worked out really well.

I couldn't help but wonder... are you ever going to put some "fury" back in your car, or are you going to stick with stock for awhile?

Here's hoping my car holds up well for at least a couple of years.

Thanks again for the AWESOME turbo!!!
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Old 08-20-2008, 12:45 PM   #20
Wagon Of Fury
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Quote:
Originally Posted by J. Steinbeck View Post
I couldn't help but wonder... are you ever going to put some "fury" back in your car, or are you going to stick with stock for awhile?
This one's gonna stay stock for the duration. During the repair I had the chance to upsize to a 2.5 STI block which alone would have gotten an extra 30-50 whp after retuning. But scary gear noise plus a newborn baby kind of scuttled the idea.

I'll wait till 2010 when the turbodiesels come out and see what sort of tweaks are available
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Old 08-20-2008, 12:46 PM   #21
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As long as you have fun with you car its all good, don't worry about what others think. A guy satisfied with a new air freshener is happier than a unsatisfied guy with a 500hp increase.

Good numbers!
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Old 08-20-2008, 02:28 PM   #22
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throw on some meth and you'll be over 300.

good job!
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Old 08-21-2008, 02:55 PM   #23
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Does that look like knock at ~5000RPM on the new tune?
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Old 08-21-2008, 03:44 PM   #24
J. Steinbeck
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Quote:
Originally Posted by decaman View Post
Does that look like knock at ~5000RPM on the new tune?
Hmmmm.....

Not sure about that one. Maybe? The car at least feels good at that point in the power band. I guess it could be a couple of other things, though.... does the close loop/ open loop delay still factor in on a car like mine? (I'm using the old version 1 Accessport.) Didn't that kick in at around the point of the dip? My tuner is a really straightforward guy, and he didn't mention anything about knock issues. (I can't say I see any real reason for him not to do so.) I might follow back up with him when I get some time, just in case.

For the record, I know very little about engine tuning, hence the reason I didn't go with Opensource to begin with, so I may have missed out on some obvious points that the graph might highlight.

Car still seems to be running really well, though.
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Old 08-21-2008, 10:44 PM   #25
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forgive me for noobness..

but anybody have a FAQ on how to read a dyno chart?
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