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Old 03-10-2009, 01:46 AM   #1
wrxSLEEPER03
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Default 272whp Vf34 2003 Wrx

Hey guys, so here's the story. When I bought my car originally it was tuned at some garbage place and it was running wicked lean but still pulled 289whp off the VF34 at 15psi. So I called up ECS in Springfield,MA to get it retuned. I went from 289whp on a roller dyno to 219whp on the dynapack without changing the tune. So after the AFR was fixed and the stock boost solenoid was ripped out for a new hallman mbc now set at 20psi my car went up to 272whp. It pullsnice and has nice response and top end. I think I now want a Big 16G. I'll post up the dyno sheet and the mods when I get a chance. But a big thanks to Paul at ECS Performance in Springfield, MA and Bishop Motorsports for the dyno time.
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Last edited by wrxSLEEPER03; 03-12-2009 at 02:15 PM.
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Old 03-10-2009, 02:00 AM   #2
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That there is some SERIOUS ricer math! Dynapack are just about the highest reading dynos out there so what really happened is that your previous tune caused your car to knock. The ECU then learned negative knock correction and/or whacked down your ignition advance multiplier (IAM). This caused your car to run reduced timing, so even though the tune was nominally the "same" in reality it was not. It would naturally make much less power that way so unfortunately you did not gain anything close to 70whp. This is not to say that your new tune isn't better, it might very well be, but you are not making anything close to 340whp regardless of the type of dyno you ran on.
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Old 03-10-2009, 02:03 AM   #3
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That's quite a bash my friend. Thank You for making me smile
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Old 03-10-2009, 02:06 AM   #4
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Quote:
Originally Posted by socalLGT View Post
That there is some SERIOUS ricer math!

hahah that was funny..

i got 300whp and 270wtq on HBspeed's dyno and their tune..sti put down 220whp to 230whp on their dyno
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Old 03-10-2009, 02:09 AM   #5
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Ya it's the same thing at Bishop Motorsports. They said an STI put down 220-225whp.
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Old 03-10-2009, 02:15 AM   #6
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I've had stock STi's make as low as 217whp on my dyno, but I don't consider that truly representative of what stock STi's do here, so I don't claim it. I have certainly seen tuned results from some shops that do not correlate with what they claim as "average" stock baselines. It's kind of the opposite of when you ask a golfer how far he hits the ball. He'll almost always give you damn near the best he's every hit it in his life as his "average". Dooood, just cause you hit it 340 yards on a huge swing that you by some miracle happened to catch solid, there was a 30mph tailwind and it was waaaaaaay downhill does not make it your "average"

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Old 03-10-2009, 02:18 AM   #7
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No offense, but I agree with socalGT(he's a professional tuner, btw). So will everyone else. A vf34 can't make 340 whp, unless you jack the crap out of the correction factor. It's just not possible. Maybe if you were running crazy boost with meth and/or race gas, but you said you're only pushing 20psi and didn't mention race gas/meth/nitrous/etc... Don't take it personally, but your 272 whp is probably pretty accurate.
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Old 03-10-2009, 02:19 AM   #8
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To the OP, sorry if you got butthurt by my comment, but I can't let stuff like "Now if you add the 70whp difference from dyno to dyno we have hit 342whp ish, lol" slide. Most of my customers appreciate my candor/brutal honesty
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Old 03-10-2009, 02:20 AM   #9
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Oh, and either way, I'm sure your car runs nice. Congrats.
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Old 03-10-2009, 02:26 AM   #10
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Quote:
Originally Posted by jason miller View Post
No offense, but I agree with socalGT(he's a professional tuner, btw). So will everyone else. A vf34 can't make 340 whp, unless you jack the crap out of the correction factor. It's just not possible. Maybe if you were running crazy boost with meth and/or race gas, but you said you're only pushing 20psi and didn't mention race gas/meth/nitrous/etc... Don't take it personally, but your 272 whp is probably pretty accurate.
A VF34 can make 340whp... just not on consistently and reliably on pump gas alone. As you said, 340whp from a VF34 is race gas or pump+meth territory especially on a 2.0L WRX.
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Old 03-10-2009, 10:16 AM   #11
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No my butt doesn't hurt, lol. I'll take the critisism and the honesty.
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Old 03-10-2009, 11:20 AM   #12
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Quote:
Originally Posted by wrxSLEEPER03 View Post
Either way, if I had less than 300whp I certainly would have got walked by a 320whp srt-4 or a 305whp(what I was told) STI right? Either way it's fast. 340,330,320. Whatever.

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Old 03-10-2009, 12:06 PM   #13
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and it did what at the track prior to the new tune and does what at the track with the new tune?

these and other ?'s answered tonight at 6!(sarcasm)
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Old 03-10-2009, 03:17 PM   #14
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Answers in the spring!! When it gets to the track!! haha. I only got one run in last year with my car due to a chevy blowing his whole drivetrain on the track on the last day of the season. Quite a site, lol. But I ran a 12.9, I'll try and dig up the slip but it's doubtful. I don't want to go by that because it was the ONLY run I've ever done in this car so....we'll see in a couple months when it gets nicer here and the track opens up.
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Old 03-10-2009, 03:42 PM   #15
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Quote:
Originally Posted by socalLGT View Post
A VF34 can make 340whp... just not on consistently and reliably on pump gas alone. As you said, 340whp from a VF34 is race gas or pump+meth territory especially on a 2.0L WRX.
unless you're at xs engineering

my vf34 on 91 octane made as much as my green on meth

god i was really smart back then.....

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Old 03-10-2009, 05:33 PM   #16
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Dyno graphs?
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Old 03-10-2009, 05:57 PM   #17
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Quote:
Originally Posted by Phatron View Post
unless you're at xs engineering

my vf34 on 91 octane made as much as my green on meth

god i was really smart back then.....

Forgot about the highest reading dyno in the world I think it put a bone stock STI at 285-290whp, so in that light 340whp out of a VF34 WRX is perfect
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Old 03-10-2009, 06:10 PM   #18
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Nice #'s & yes SoCalLGT does speak the truth always, even when it isn't what everyone wants to hear, its honest
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Old 03-10-2009, 10:07 PM   #19
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Your 2.0L vf34 isn't going to make anything close to 340whp, you may get 310 ish with a really aggressive tune. 270-290whp is typical.
I'd almost guarantee you the srt-4 and STI owner were talking out their ass, typical street racer banter.
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Old 03-10-2009, 10:20 PM   #20
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Why does everyone care about hp anyway? Even inconsistent - dyno to dyno - who cares? Maybe I'm weird but I really only ever look at my torque graph....

You can always tell how aggressive a tune is by the torque curve... Hp is just a calculated figure..

-Jerod


And 350 wtq is not impossible on a 34 but your going to need some serious octane and scary timing...

IE: 2001 Cummins diesel 2wd... 6spd manual

Makes 450whp... 1385wtq and from 50-130 makes a z06 look like a Geo...

Doesn't make **** for HP - but it sure makes torque....

Runs the quarter in a whopping 12.8 (6speed.....) at 130mph at governor...
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Old 03-10-2009, 11:06 PM   #21
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How can you tell your tune is aggressive by looking at your torque graph?
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Old 03-10-2009, 11:11 PM   #22
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Quote:
Originally Posted by JSarv View Post
IE: 2001 Cummins diesel 2wd... 6spd manual

Makes 450whp... 1385wtq and from 50-130 makes a z06 look like a Geo...
and what does the diesel look like from 0-50mph.....a tractor?

it all depends on what kind of powerband you want.....

personally i'd rather have something thats fast 0-75 mph since thats the fastest i can legally go.

having something thats fast from 50-130mph pretty much does you no good in the real world......especially a big ass truck that probably handles like a dream and guzzles gas like no other....to each his own though.
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Old 03-10-2009, 11:13 PM   #23
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Slope - Peak... Hold...

An aggressive tune will have a higher peak (peak torque) and will taper more but hold a higher redline torque number than a less aggressive tune that will still have a peak but will be more like a hill than a mountain.... Or flatter...

A dyno does not measure HP... HP is just a number generated... Torque or force is what is truly measured by a dyno..

HP is just work over time...

1hp = 33,000 lb-ft/1min or 746watts... Torque is what you feel when you accelerate...

-Jerod
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Old 03-10-2009, 11:17 PM   #24
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Quote:
Originally Posted by Phatron View Post
and what does the diesel look like from 0-50mph.....a tractor?

it all depends on what kind of powerband you want.....

personally i'd rather have something thats fast 0-75 mph since thats the fastest i can legally go.

having something thats fast from 50-130mph pretty much does you no good in the real world......especially a big ass truck that probably handles like a dream and guzzles gas like no other....to each his own though.
lol...

From the city? No from 0-50 it has no traction - even with slicks... 2nd-4th.. If it had an auto it would run low 11's (this is a 6000lb truck)

And 21mpg is not guzzling FUEL....

I just feel torque should be more a concern to people...

And yes to each his own...

-Jerod
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Old 03-11-2009, 12:40 AM   #25
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i was born in hammond, in which isnt too far from effingham.....but i live in the middle of nowhere california now....so the city....no. i live in a town of 30,000......~7 stop lights....1 main street....

its just that hp is what sells cars and what has sold cars forever.

looking at a tq curve or a hp curve is in effect the same thing.......

i mean its just like looking at measurements in feet or meters. they represent the same exact thing, just in different units. basically just depends on what each person is used to dealing with.
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