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Old 10-09-2007, 10:42 PM   #1
outlwstr
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Default Whats With My Dyno Graph!!??

UPDATE: So I took my car down to Harman Motive yesterday, and let me just say. Ive never been to a shop where ive felt so well taken care of. They are so professional it amazes me everytime im there. Dan kept me up to date on everything he was doing, and i really appreciated that. He found the problem and helped me with what i need to fix it. I might live 3 1/2 hours from there shop but its worth it knowing my car will always be in good hands.

Thanks Dan, im looking forward to my next visit.



I got an 04 wrx. with not that many mods..
vf34
660cc injectors
fuel pump
TBE
Intake
AP.


I got my car tuned at harman motive awhile ago and i was just looking over my dyno graph and was wondering why it looked like this.. why is it so bumpy going up and down like that. doesnt look smooth at all. .. what could cause this. i dont think it was a bad tune cuz harman motive is a very respected and professional shop.

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Last edited by outlwstr; 11-09-2007 at 03:58 AM.
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Old 10-09-2007, 10:51 PM   #2
intercoolerontop
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most dyno graphs look like that, the ones that are completly smooth are usualy smoothed out with the program. your air/fuel is nice as well
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Old 10-09-2007, 11:11 PM   #3
outlwstr
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oh well ok thanks. like u said most of the ones ive seen are real smoth so..this kinda threw me off
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Old 10-09-2007, 11:59 PM   #4
benw
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looks great to me. How does it drive?
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Old 10-10-2007, 12:36 AM   #5
outlwstr
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Originally Posted by benw View Post
looks great to me. How does it drive?
honestly drives smooth but feels like im missing 50hp or more when i get on it
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Old 10-10-2007, 01:24 AM   #6
socalLGT
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That looks like a very solid tune. All Dynojet graphs have little bumps and dips. Just the nature of the dyno and it's software especially on a stock ECU car. As for the car feeling slower, you are likely just used to the power.
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Old 10-10-2007, 03:24 AM   #7
outlwstr
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Originally Posted by socalLGT View Post
As for the car feeling slower, you are likely just used to the power.
well idk about that. pretty much stock s2000's and 350z can keep up or beat me. as well as AP stage 1 wrx's
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Old 10-10-2007, 03:37 AM   #8
The Blue Pilot
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^^bad driving, or not-so-stock cars you're running up against.
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Old 10-10-2007, 03:49 AM   #9
Teylix
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i like it.

same power as my car basically
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Old 10-10-2007, 10:06 AM   #10
karl750
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Quote:
Originally Posted by outlwstr View Post
well idk about that. pretty much stock s2000's and 350z can keep up or beat me. as well as AP stage 1 wrx's
I run a VF30 and have a very similar dyno graph to you. There is no way a 350z or a s2000 could keep up with me. I think it's your driving. Your car's power looks good. Take it to the track, you should trap 103-105 and be around 13 flat all day long.
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Old 10-10-2007, 07:54 PM   #11
wrex03
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Quote:
Originally Posted by outlwstr View Post
well idk about that. pretty much stock s2000's and 350z can keep up or beat me. as well as AP stage 1 wrx's
Get a compression test if this is true. I own a s2000 and it should not be able to keep up with you!
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Old 10-10-2007, 07:59 PM   #12
layzienoy
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i agree with the statement that somethings up i drive my dad's S2000 alot and it shouldn't be too much of a challenge.

and for the dyno it seems normal
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Old 10-11-2007, 08:28 AM   #13
jaxscuby
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usually after a tune the car's power delivery smooths out
or feels like your going slower. but if you glance down at
the tach & speed, you should see the speed moving faster
than the tach..
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Old 10-11-2007, 08:51 AM   #14
SloRice
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Quote:
Originally Posted by jaxscuby View Post
but if you glance down at
the tach & speed, you should see the speed moving faster
than the tach..
WTF??



Oh and by the way....the graph's smoothing is turned all the way up (5). Good thing Harman got rid of their Dynojet and got a real one dyno....Mustang's don't have this problem, even with the smoothing turned off.
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Old 10-11-2007, 10:39 AM   #15
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Just because one WOT pull shows good numbers it does not mean that the ECU has learned knock at part throttle, exceptional conditions, etc. Everyone should have a way to log their car and see what the tune has become a few weeks after the tune. I don't care what shop it is, every tuner can make mistakes or not account for something. With those numbers, there is no way an S2K should keep up at all.

Gabe
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Old 10-11-2007, 02:15 PM   #16
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Quote:
Originally Posted by gabedude View Post
Just because one WOT pull shows good numbers it does not mean that the ECU has learned knock at part throttle, exceptional conditions, etc. Everyone should have a way to log their car and see what the tune has become a few weeks after the tune. I don't care what shop it is, every tuner can make mistakes or not account for something. With those numbers, there is no way an S2K should keep up at all.

Gabe
this is true. non-WOT driveability is impossible to infer from a dyno pull.
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Old 10-11-2007, 02:17 PM   #17
capamerica
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spark plugs might be shot. how many miles do you have on your plugs?
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Old 10-11-2007, 06:48 PM   #18
outlwstr
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i dont beleive its my driving thats the problem.. ive had other people drive my car with same results of cars keeping up with me when they shouldnt be..

and can someone explain what a compression test is? thanks

and as far as the spark plugs go. ive always thought that maybe they should be changed and maybe that was the problem.. there are 35,000 miles on origanal spark plugs
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Old 10-11-2007, 08:01 PM   #19
bren wrx
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needed to be strapped down better.......
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Old 10-11-2007, 08:08 PM   #20
B00st3dWRX
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im a stg2 on my TD04 and I blow away 350's or S2k's, hell my dads s2k doesnt stand a chance. Datalogg the sucker!
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Old 10-11-2007, 08:31 PM   #21
ryantherobot
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Dan or Jon tune?
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Old 10-11-2007, 08:34 PM   #22
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35k on the plugs, check you user manual. WRX spark plugs should be changed every 30k. Speaking of which I need to get myself a set of new plugs... Iridium step 1 colder FTW.
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Old 10-11-2007, 10:09 PM   #23
blindfold
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what is your redline, "looks" like it's revving beyond
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Old 10-11-2007, 10:38 PM   #24
Kaldar142
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Quote:
Originally Posted by Sooby Soldier View Post
35k on the plugs, check you user manual. WRX spark plugs should be changed every 30k. Speaking of which I need to get myself a set of new plugs... Iridium step 1 colder FTW.
not to hi-jack or anything, but is there any benefit from getting irdium step 1 colder plugs?
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Old 10-11-2007, 11:52 PM   #25
Sooby Soldier
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Quote:
Originally Posted by Kaldar142 View Post
not to hi-jack or anything, but is there any benefit from getting irdium step 1 colder plugs?
Check this out, it is off the denso iridium website.

"A good, general rule of thumb is to start with the factory recommended heat range. For every 75 to 100 hp you add to your engine, you may go to the next colder step."

This is why I was recommending it to him in particular because his wrx is running about 75-100 over stock. (I can't remember off the top of my head what a stock wrx would put at the WHEELS.) There is much more info about iridium plugs here http://www.densoiridium.com/faq.php
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