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06-25-2003, 11:15 AM | #1 |
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Another STX legal management question.
A buddy of mine has an Integra Type R. Here is an explanation from him about a piece of engine management that he uses.
"The VTEC/Fuel controller I have is made by Fields. It allows me to change the VTEC switchover point for the cams on the fly and also allows fuel adjustment +-30% at 8 RPM points. It then builds a fuel curve based on the points, at 2000 rpm add 2 %, at 3000 rpm add 6 %, it then automatically calculates what the % to change at 2500 rpm based on the other 2 points. It has a high cam and low cam fuel map. " In my ignorant opinion, this seems no different than altering boost on a turbo car. However, thats not legal in stx. If what he is doing is legal, then can I assume that the "reflashes" will be legal, given this qoute- "No...the reflash basically enlarges the available envelope of boost control the ECU is capable of. My understanding is that the highly sophisticated boost control in our WRX ( controlled by the ECU )uses a whole host of data base parameters to control everything the engine does AND it is quite conservative / stingy, erring on the side of boost cut and enriching the AF ratio to prevent det and high tempurature in the combustion chamber. The reflash broadens the parameters the ECU uses as target benchmarks. It does not go in and specifically say ..."Hey, I want 15PSI at WOT from 3650 RPM to redline, etc,etc." I put this thread in this forum because I tend to see and get more professional responses than in the "engine management" forum. Also, this is more or less specifically directed at the legality of these methods in STX. Thank a lot, Scott P.S. Bare in mind, these qoutes are NOT from professionals, so some corrections are welcome, if necessary.
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06-25-2003, 11:24 AM | #2 |
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It's all in da rulez.
The VTEC controller is STX-legal. 17.10.D.5 VTEC controllers and other devices may be used which alter the timing of factory standard electronic variable valve timing systems. Boost control is not. Excerpted from 17.10.D "...except that no changes to standard boost levels, intercoolers, or boost controls are permitted." -Steve |
06-25-2003, 11:32 AM | #3 | |
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Well, given the explanation of the reflash, assuming thats accurate, do you think that will be legal? |
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06-25-2003, 11:38 AM | #4 |
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Controlling VTEC is legal.
Controlling Fuel is legal UNLESS he also replaced a Fuel Pressure Regulator. "It is not permitted to electronically modify the fuel system AND replace a fuel presure regulator. " If our cars had AVECS, we'd be able to change that too. --kC |
06-25-2003, 11:51 AM | #5 |
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Is SCCA even specifically addressing ECU reflash for forced induction platforms....From my understanding...it appears that the conservative approach is to not implement some mod that is not specifically addressed by the code....however, I guess any particular mod (such as reflash)would need to be fully understood by the code writers or reflashers to know whether it violates any current code or impacts how technical releases will address it. The sad part is, frankly, reflashed ECU's are invisible and are probably being used in STX all over the place. You won't know or hear about it unless somebody speculatively protests or protest based on knowledge that the user has reflash in his car>
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06-25-2003, 12:03 PM | #6 | |
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Given that explination of the reflash, it would not be legal.
Quote:
I have communicated with Doug Gill about reflashing our ECU's. Under the reflash rules we apply the same restrictions as found in street prepared. The bad news, we can only modify ignition and fuel trim tables. The good news, after talking with Vishnu, most of the tables in the ECU are ignition timing adjustments or fuel trim adjustments. (not including the boost control tables of course, the boost control system uses it's own table). The reflash actually does not broaden the ECU's capabilities, but narrows it, drastically, to a limited performance range ( max hp, max torque ). The stock ECU is far more generic, programmed for minimum emmisions output, and to accomidate the wide variety of different fuel and driving conditions found in the US. |
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06-25-2003, 12:39 PM | #7 | |
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-Steve |
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06-25-2003, 01:09 PM | #8 |
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Perfect timing. In the current fastrack there is a paragraph that says "Per the STAC, competitors in STS/STX are reminded that
altered ECU engine controllers may NOT alter boost levels in forced induction engines." ANYTHING WITH THE ECU CANNOT MODIFY THE BOOST LEVEL IN ANY WAY SHAPE OR FORM. -Tom |
06-25-2003, 01:10 PM | #9 | |
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Nope. You have to get 'A' map. Where did this map come from? NOT from your car. (ie: downloaded off YOUR Stock ECU and put back on, exact value for exact value, column by column, row by row. If shiv can read your Boost Table, then why can't SOA read it with their tools? Answer: you cannot. It's a made up table taking the best of one and the best of others using best knowledge of recording realtime data and 'filling in the blanks'. There's no 'table dump feature' AFAIK). And then how can one tell? You cannot just go to a dealer and look at the table. They cannot read it. How does one know exactly WHAT STOCK VALUES ARE? No way of knowing, especially in a protest situation. Hence, any way of using an ECU that could adjust boost, IMHO, should be illegal, becuase it CANNOT be independently verified.) I'm being obstinate and thick headed here I know. But I feel the boost maps ARE changed on your ECU when you get an ECUTek. --kC Last edited by KC; 06-25-2003 at 01:20 PM. |
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06-25-2003, 01:33 PM | #10 |
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Thanks to everyone for your responses
For some dumb reason, I just thought of going to Cobb's website and digging thru their forums. Apparently, they are working on a STX legal map now. I found no evidence that one was ready, though. My understanding of "stock boost levels" are as follows: Max is approx 14psi which tapers off to approx 12psi at high rpms. I see no reason why Cobb or Shiv couldnt make other adjustments to optimize the car but keep similar boost numbers in order to prevent a protest. Scott |
06-25-2003, 01:36 PM | #11 | |
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06-25-2003, 01:37 PM | #12 | |
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-Tom |
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06-25-2003, 01:41 PM | #13 |
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Tom,
First of all, I wish I knew you, this would be more fun. Second, you missed a key word in my statement "APPROX." Thank you very much, Scott edit: I do look forward to meeting you, maybe at next years Nationals or a divisional. I DO plan on kicking your butt. (on the track, of course) Just trying to think positive |
06-25-2003, 01:43 PM | #14 |
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In 3rd gear, mine tapers off to almost 8psi
-Tom |
06-25-2003, 01:45 PM | #15 | |
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You must be busy at work, like me!!! |
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06-25-2003, 01:55 PM | #16 |
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Scott....give up....let this engine management plan go....forget about it.....think S U S P E N S I O N... s u s p e n s i o n....Oh wellski...just kiddin ya fella....BTW...folks around here like to get double wrapped in semantics don't they? DBase parameters and tables, etc, etc, ad infinitum...Does it show what ya know, or does it show what ya read....see ya on the track
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06-25-2003, 01:58 PM | #17 |
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Leave it to you to put GPS coordinates as your location
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06-25-2003, 02:06 PM | #18 |
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Nice touch EY! I think it's somewhere in the middle of the St.John's no less...Reflash right now (ie Cobb) doesn't look like it would pass STX currently.....Hmmm, come to think of it, neither would restrictor tubes....
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06-25-2003, 02:15 PM | #19 | |
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Quote:
So, if you reflashed your ECU, but did not alter any boost control parameters, and measurable boost levels changed you are illegal. If you reflashed your ECU, but did alter boost parameters to maintain stock boost levels, you are illegal, per rule 17.10.D Since boost paramters appear to be keyed off of other tables, it seems to me that ANY reflash that doesn't touch boost parameters will end up altering boost levels, hence you'd be illegal again per the fastrack. Looks to me like anyone who touches their ECU is illegal. The way the rules are written you can't take advantage of the rules available to NA competitors due to the architecture of the ECU. |
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06-25-2003, 02:24 PM | #20 | |
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On the one hand - A LEGAL mod that the resultant configuration increases/spikes boost is legal (see boost creep in ESP talon/Eclipses with just exhaust mods) On the other - Ths modification of an ECU is a PITA because there's no one out there that tunes these cars that can say "It does NOT alter boost levels". The problem is, even if they did, there are those in competition that would not beleive the tuner of the ECU to be truthful if it means his product is being used to win. Ergo, there's no way to Independently verify (in the case of a protest) if it was the Reflash or other mods. Gonna do some playing this weekend with my Stock ECU, my vishnu Unichip and a car that has an EcuTec... and see what Delta Dash says is the difference between the three. --kC |
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06-25-2003, 02:27 PM | #21 | ||
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Here is a response I got from the SEB/STAC liason Mark Sipe on this issue Quote:
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06-25-2003, 02:38 PM | #22 |
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A larger problem as I see it is in the governance of the rules...Unless the ECU were to be tested by a rules body or through some other means....nobody's going to know from one reflash to the next, which do modify boost table, which don't....its strictly an honor thing by the driver...'Well, uh...um..yes I have the STX legal map reflash' or 'Geez...I...errrr...uhh...well, I have a reflash but they...uh...didn't tell me what it does per se...'
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06-25-2003, 02:55 PM | #23 |
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A deltadash test and a boost gauge test will be enough for a nationals protest. A boost gauge by itself was good enough for my boost protest last year at nationals.
-Tom |
06-25-2003, 02:58 PM | #24 | |
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Maybe you should package that and sell it ECU PROTEST KIT!!! GET YOURS TODAY!!! |
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06-25-2003, 03:56 PM | #25 | |
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