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Old 09-02-2013, 01:29 PM   #1
coreyfrenzel
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Default These numbers seem way off...

2007 WRX TR 90,000 miles.
Stock turbo
Full turbo-back exhaust
SPT intake
FMIC
HKS BOV
Accessport stage 2 tune
18psi

I got my car back from the tuner and they emailed me this dyno sheet. These numbers are seriously high, right? I've been a Honduh guy for years and this is my first Subaru so I'm not the most well-versed in their power/torque potential. But comparing to similar results on this forum, I say BS. Thoughts?

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Old 09-02-2013, 01:33 PM   #2
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It is what it is. Yeah it's quite high for that small turbo but would you happier if he adjusted the dyno to read lower and gave you another graph? Car it self will still be making the same power. Just enjoy it.
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Old 09-02-2013, 01:35 PM   #3
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Just because I paid good money for the tune, I'd like to have real results. It seems that similar stage 2 tunes have been seeing 70hp less than mine. Am I wrong?
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Old 09-02-2013, 01:43 PM   #4
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A little high... But it's also a dyno jet. Which reads a tad higher then normal. As long as you had a baseline, and it showed improvement, thats all i would use a dyno for anyways. These dyno numbers are way too subjective to be compared anyways.
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Old 09-02-2013, 01:47 PM   #5
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Quote:
Originally Posted by coreyfrenzel View Post
2007 WRX TR 90,000 miles.
Stock turbo
Full turbo-back exhaust
SPT intake
FMIC
HKS BOV
Accessport stage 2 tune
18psi

I got my car back from the tuner and they emailed me this dyno sheet. These numbers are seriously high, right? I've been a Honduh guy for years and this is my first Subaru so I'm not the most well-versed in their power/torque potential. But comparing to similar results on this forum, I say BS. Thoughts?

Go run it at the track. At that power, you should trap around 110-112mph.

Quote:
Originally Posted by subarulz! View Post
It is what it is. Yeah it's quite high for that small turbo but would you happier if he adjusted the dyno to read lower and gave you another graph? Car it self will still be making the same power. Just enjoy it.
On a Dynojet, there is no way of adjusting it for it to read higher except if you calibrate it wrong and input a different size/weight drum then you have, but thats kind of a lengthy operation. You can also mess with the smoothing, but thats only going to yield a 3-5hp difference at max.
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Old 09-02-2013, 02:11 PM   #6
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No td04 is making that kind of numbers its just not possible. For your mods on a td04 you should be in the range of around 240whp or so maybe 260 on a high reading dyno. Are you sure its a td04?

Last edited by nate_fisher; 09-02-2013 at 02:18 PM.
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Old 09-02-2013, 02:59 PM   #7
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Quote:
Originally Posted by coreyfrenzel View Post
comparing to similar results on this forum, I say BS. Thoughts?
The hp/torque crosses at 5252 RPM like all curves must so that's correct.

If you post your comparison results your car may come in at the top 10% or 5% or 1% but I'd have to see the numbers. If your car is better than 1 in 1000 I'd say something's fishy.

You can also ask when their dyno was last calibrated and, "Is it traceable to the NIST?"
Equip. that tends to drift out of calibration needs to be checked more often. For laboratory test equipment, IIRC, it was every four months but dynos see a much more hostile environment.
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Old 09-02-2013, 03:00 PM   #8
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Curve looks nice. I wouldn't go saying it's a 3xxwhp WRX. Go run it at the track and get a MPH to back it up.
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Old 09-02-2013, 03:05 PM   #9
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something is definetly wrong. no way in hell are you making that power with stock turbo. thats about 100hp too high. those are 20g numbers. nope i dont care how high a dyno is reading thats wrong. either you have a larger turbo that you dont know about or that chart is completely worthless. youll be lucky to be making 250whp with a tdo4, LUCKY. and maybe 300 with an sti vf39/43. but 350 no way in hell....id want an explanation at the very least if not my $ back
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Old 09-02-2013, 03:12 PM   #10
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There are several sources for comparison numbers:
-forum members dyno readings
-forum members track times
-comparative data from the dyno shop (do they look at the numbers and compare with historical data?) How 'bout the shape of the curves?
-data from the Web
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Old 09-02-2013, 03:16 PM   #11
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It's definitely a TD04. I just double-checked. I just wanted to figure out if I want to go VF39 or if it's not even worth the few hundo.
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Old 09-02-2013, 03:25 PM   #12
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And I have compared my numbers to others on the web. That's what made me skeptical. Of course I'd love to tell my buddies I'm making 336awhp! But I know it's not true. My 333rwhp supercharged S2000 pulled harder, for sure. Don't get me wrong, I'm not saying my car is slow. I just want to get your input in order to investigate more. I definitely appreciate your help, guys. Like everyone else in the game, I don't want to be the idiot that claims 336hp while standing next to a big turbo STi guy that's at roughly the same number, saying "BS!" in my face.
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Old 09-02-2013, 03:52 PM   #13
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so did you ever get a correct dyno chart? just curious as to what you are making.
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Old 09-02-2013, 03:56 PM   #14
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I'm just gonna write my thoughts and then I'll read the thread. I only looked at the OP.

The turbo seems to spool really slow. Is peak boost around 5000 rpm?

The numbers seem nice and high so apparently it makes great power for a stock turbo. The plot looks like a larger turbo to me. Especially the onset of boost, however the pull started at like 3700 rpm. And normally at 3700 rpm the turbo has reached peak boost. Peak torque should be happening a lot sooner. The whole graph is shifted right of where I would expect it to be. ( I'm no tuner, just what I have seen on here )

Last edited by some dude; 09-02-2013 at 08:53 PM.
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Old 09-02-2013, 04:01 PM   #15
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I did email the tuner so I hope he has an answer.
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Old 09-02-2013, 05:31 PM   #16
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take it to another dyno and see what it puts down honestly i dont care about dyno numbers i care about the curve and if it feels nice and smooth driving and pulls hard than iam happy but i get what your saying how you dont want to claim 336 hp if its putting down mid 200s
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Old 09-02-2013, 05:58 PM   #17
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Quote:
Originally Posted by alexandern05 View Post
take it to another dyno and see what it puts down honestly i dont care about dyno numbers i care about the curve and if it feels nice and smooth driving and pulls hard than iam happy but i get what your saying how you dont want to claim 336 hp if its putting down mid 200s
THANK YOU for a decent response! I just don't know of many all-wheel dynos in this area. I just wanted to start with the tune that I got recently as my baseline and do my upgrades and record my power findings, rather than throwing money into it and not knowing if I'm + or -.
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Old 09-02-2013, 06:10 PM   #18
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Are you sure they sent you the right dyno sheet?
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Old 09-02-2013, 06:31 PM   #19
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Haha yeah I was going to ask if that was the right sheet, it doesn't look like it...Too much HP and torque, curve doesn't look quite right for a TD04... I have only seen BRZ plots come out of P&L lately but they are not over inflated versus other dynojets.
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Old 09-02-2013, 06:41 PM   #20
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Quote:
Originally Posted by coreyfrenzel View Post
It's definitely a TD04. I just double-checked. I just wanted to figure out if I want to go VF39 or if it's not even worth the few hundo.
yes it is definetly worth the few hundo. in fact it is one of THE best mods for the $ you can do to a wrx. the amount of hp/tq you get for the relatively low cost is unbeatable. sure there are better turbos out there, but none are going to be near as cheap as a used vf39/43.

there are a ton out there because a lot of sti owners upgrade, so the cost is low and the availability is high. and since you have an 06/07 you dont need bigger injectors. you already have same size as sti (565cc). literally all you need is the turbo and a fuel pump if you dont have one already.

also my 20g turbo has peak tq before yours. your td04 turbo should have a massive spike arouns 3000 rpms. it will look like an upside down V. i said it before and i will say it agian that graph can not be right. the numbers are too high and the shape is wrong too. its a broad flat curve. td04 falls on its face by 5000 rpm and the vf39 not much after that.


so yes that chart and numbers are wrong. as long as your happy with the car thats all that matters but dont go around saying you got 340whhp cus you probably have about 240. get beside an sti/wrx with a true 350whp and you will be blown away. and the sti turbo is a great upgrade. anything past that and your gonna have to dumpo seriouos $ in for motor and tranny work if you want it to be reliable. i wish i had jsut stopped at vf43

just for fun here is what my 07 wrx made on its stock turbo with similar mods (upgraded TMIC not FMIC). on a very aggressive tune on a mustang dyno. the dotted line is a stock baseline.

yours should look like this ( more or less) yours isnt even in the same ballpark

this was same setup but upgraded to a used sti turbo vf43. this should give you something to compare it to/ givve you an idea what to expect.

Last edited by 07VTRex; 09-02-2013 at 06:46 PM.
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Old 09-02-2013, 06:43 PM   #21
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Another option that I did as a wee lad, with a '55 Chevy:

Do we all agree that a hp is 550 ft-lbs/second???

You know your car's weight + passengers WT in lbs. Drive up a steep or gradual hill of known vertical rise VR in feet (you can measure this quite easily) within a time T in seconds and while keeping the tach at the hp peak RPM.

Then, whp = VR x WT/(550 x T) so a 3000 lb car going 100' vertically in 5 seconds gives you 100 x 3000/(550 x 5) = 109 whp. In this case we are not looking for a whole lot of accuracy, we are looking for a gross error.

Then post a YouTube video!
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Old 09-02-2013, 06:45 PM   #22
coreyfrenzel
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The sheet attachment had my name on it. But that means nothing. I sent Dylan at P&L an email requesting an explanation. So I'll get back to you guys about it when he responds. I'm aware that the dyno numbers don't matter much. But for my own benefit, it would be nice to have numbers closer to what I'm making, especially since all my buddies are V8/nitrous muscle car guys that like to ask a million questions about my "tuner car". :P
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Old 09-02-2013, 06:49 PM   #23
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that curve is not from a tdo4 2.5l car plain and simple. Not even looking at numbers the curve is super odd. Peak tq should come 2k earlier and HP should fall quickly after peak. Just the way it is.

Run some data logs if u can and run it thru a dyno software.
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Old 09-02-2013, 06:53 PM   #24
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Just run a datalog of a 3rd gear pull from 2k to redline into the virtual dyno and see what you get and then compare the two.
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Old 09-02-2013, 09:05 PM   #25
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Quote:
Originally Posted by coreyfrenzel View Post
The sheet attachment had my name on it. But that means nothing. I sent Dylan at P&L an email requesting an explanation. So I'll get back to you guys about it when he responds. I'm aware that the dyno numbers don't matter much. But for my own benefit, it would be nice to have numbers closer to what I'm making, especially since all my buddies are V8/nitrous muscle car guys that like to ask a million questions about my "tuner car". :P
Yeah I am going to go with it not being your plot. It looks like a good tune and a decent amount of power, but like others said that isn't a 2.5L TD04 plot.
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