Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Some interesting tuning and dyno results!!

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Old Dec 8, 2004 | 08:20 PM
  #31  
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Posts: 8,228
From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
Originally Posted by wssboard18
I know there are different factors for each of the tunes and i understand that. I have heard that you can make max or more power while tuning on the dyno as aposed to just road tuning. My main problem is that the dyno result was less that what I had before i upgraded my turbo. 209whp pre vf22 vs. 206whp post vf22. Like i said before that i would have been satified with only 225whp or so. Atleast it was more hp than what i had before.
I just noticed that the I-Speed tune did indeed have 16.8psi of boost. Is there a reason for this that Bill mentioned to you? Or maybe any problems that Bill encountered while tuning your car that he mentioned to you? With your turbo, you should be able to make 18psi pretty easily. Maybe you had a boost leak that was fixed when you installed the new TMIC? That would certainly explain the low numbers and lean a/f.

-- Ed

Last edited by MethodBuilt; Dec 8, 2004 at 08:48 PM.
Old Dec 9, 2004 | 06:33 AM
  #32  
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Joined: Jun 2004
Posts: 63
From: CP - Oceanside, CA
Car Info: X-Wing: ECU Tuner
Vaus is onto a very good assumption that I failed to notify Chris (wssboard18) about. Here is the story from my side... You make your own choice...

1. Yes I was in town one of the two times, and I did planned both trips with Chris prior to this. The first time was for the initial tune which went ok, though I noticed from the start a smal boost issue, though I could not pinpoint what. It seemed to lower it self very little after each flash. Then the next day it was quite a bit lower. The second tme I drove up becaue your car was having problems and I said I would take a look at it and readjust it. Usually I charge for driving time and tuning. Both times of which we spent 3 hours tuning and I spent 2 hours driving to and from LIC each time.

2. You asked for a reliable tune, I gave you a tune I felt was reliable for the setup you had. Though you told me about a problem you were having the next day after each tune where the boost would drop about 1.5 pounds. The 2nd time I came back up I even added in more wastegate duty cycle then previous (by quite a bit) to get the boost back to a normal value while adjusting other values to make sure things were safe. Though there seemed to be a problem with that also as the boost dropped again the next day. I did let you know there seemed to be a boost issue and I suggested LIC to check it out.

3. After this you had an Intercooler installed and then ran on the dyno to see how much horsepower it was making. Now you made 206 whp, with a previous boost issue on the old map and a new intecooler. Now the map made solid boost from what you told me though after the new IC. Seems as though too me there might have been a prolem.

4. Now as for dyno numbers, Shiv has stated in th past a recalibraion is needed "... It also explains how a stock WRX which dyno'd a long time ago at 176 wheel hp came back since the dyno calibration and made 165 wheel hp..." This would say that our dyno between your two runs might have been off by as much as 12. Who knows what it would have read on a DynoJet, though at least they are consistent as stated by Sport Compact Car Magazine, July 2004 Issue. Also dyno's are known to be off by as much as 5 horspower, between different day runs from outside variances beyond calibrations.

5. Another great quote from Shiv, "...One of the most important things about tuning is looking for patterns. All cars with similar set ups work similarly. And if they, for some reason don't, it's like walking in a minefield. That is, one does not know what to expect and has to play ultra-convervative in all areas. " Now with the fact the car was tuned to be reliable and you wanted very reliable, more so then most I made it extra reliable, to the point if other parts were installed you would still be ok down the road, taking into consideration fueling, timing and boost, and other parts. Though the fueling was a little more dramatic then I thought, as that would say there might have been a mechanical failure somewhere.

Once I again I apologize for the tune, as I feel it was the best I could do with the cars problems, though when the NEW IC was installed it went away and caused the car to run leaner then expected. The only thing I could see how I would do this differently next time would be to keep my customer more up to date on what is going on with the car.

Though now I am glad you are happy with the car and hope that it serves you as you requested.

Cheers,
Bill Knose
Lead Tuner
I-Speed USA

P.S. The ability for the car to have a mechanical failure (boost related, which can lead to inaccuracies in fueling), have it resolved with a new installed part yet still run pretty reliably, road tuning.
Old Dec 9, 2004 | 08:16 AM
  #33  
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Joined: Nov 2003
Posts: 162
From: north bay, CA
I dont want this to become an internet war, I jsut posted some results that i found interesting. As for Bill you never sadi anyhting about boosy issues to me or Lic. I will get them to stand by that statement if needed. After the last run of the first tune you said that the boost was too high so you lowered it. Well the next day i got in my car and it was only boosting to about 15.5 to 16. Then you camre back and tuned it for 17 to 17.5 and depending on the weather it was at or close to that mark. The funny ting is is that you sadi you loved the port of the waste gate that Lic did and you sadi it was so easy to control boost. Now where does this problem of boost come in. After the first tune you told me that you jsut lowered it too much after the last run. You even went back into your logs and checked that out too. Indeed you lowered it too much and that is whay we tuned it again. I was never told of any problems, so un less you are hiding stuff from your customers, I think you may jsut be making excuses. I dont believe Lic has any knowledge of problems with my car either?
Old Dec 9, 2004 | 04:28 PM
  #34  
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Joined: Nov 2003
Posts: 162
From: north bay, CA
[QUOTE=skywalker]Vaus is onto a very good assumption that I failed to notify Chris (wssboard18) about. Here is the story from my side... You make your own choice...

1. Yes I was in town one of the two times, and I did planned both trips with Chris prior to this. The first time was for the initial tune which went ok, though I noticed from the start a smal boost issue, though I could not pinpoint what. It seemed to lower it self very little after each flash. Then the next day it was quite a bit lower. The second tme I drove up becaue your car was having problems and I said I would take a look at it and readjust it. Usually I charge for driving time and tuning. Both times of which we spent 3 hours tuning and I spent 2 hours driving to and from LIC each time.


By the way Bill I met you half way the second time in south San Francisco. You were in San Jose and I was in Novato. And it wasn't a planned in advance to have 2 tunning sessions. The boost was not set right after the first 2 1/2 hours of tuning so we met up again to fix the issue. I dotn want this to become the typical i-club bayarea drama, it was not my intentions. I just wanted to put out some interesting dyno results and to give Shiv and Vishnu some praise for another great tune. I was under the impression that everything was ok with my car from Bill, otherwise i would have posted the problems I was having along with the results. Shiv noticed no problems with my car when he dynoed Bill's tune (besides the obvious low numbers). Shiv also dod not give any reason for the low numbers, whether he just didnt want to tell me or he didnt look into his tune besides the a/f and the power numbers. Anyways I am more than happy now and thats what counts for me.
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