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Originally Posted by cdigerlando
I can definitely send you logs. I do not log EGT. Suffice it to say I make sure that I go from about 400 or 450 to just a bit over 800 C from idle to redline. The AFR readings suck and are incorrect. They are logged from the narrow band, not the wideband. The wideband readings are very rich. Anywhere from 13 to 10. Everything else is there though. Advance, knock, RPM, MAF, MAT, Inj on times. If you like pm me your e-mail address. Preferably an address that will take large files. I will also e-mail you a link to download the tec2 program, which has a great way for you to look at the information rather quickly and efficiently. I've converted it to a spreadsheet but find these graphical displays to be useful. Any help you could offer would be greatly appreciated.
I have found it useful to check my MAF, RPM, and Advance numbers when a predetonation event is sensed. That way I can back down the advance from that point. I have been working (or winging) on a new map to try Saturday or Sunday. You may want to wait to see the result of that.
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Sounds good. Yea i did not mean a narrowband. A narrowband sensor does no more then tell the computer weather the car is running rich and lean, its noting more then that, its not a tuning tool.
Logging EGTs can tell us a lot about your ignition as long as we can verify your lambda is where it needs to be and when. Especially so on a high compression low boost application that is not intercooled such as yours.
I also am interested in the type of compressor you are using, as in trims and a/r as i have a feeling that if you infact cannot run as much timing as lan can it has much to do with some low density charges, remember reguardless of the charge temp since you are running off the gate your turbo will make the same amount of manifold pressure fairly consistnatly.
I think the next step will be temp probes before and after the turbo, if i can get your precharge and charge temps along with ambiant temps i can give you a good picture of what is going on (find the efficency of the compressor and what is caughing it up ) . MAF based systems drawing air before the turbo can sometimes have problems since the temp is a function of the overall voltage required to heat the sensor filament. speed density system often reference at the throttle body, your referencing preboost, precompression, and preheat. Whereass the total air entering the engine is still constant the amount of advance may be too high, and knock beiing detected will cause a pull obviously.
I dont have a ton of TEC experience but i do have experience with hondata, chrome and AEM. Also have you tried removing the air filter for a run or two? If your aif filter is posing a restriction it can increase charge temps since the compressor is strained to meet the same pressure ratio but work against gravity to do so, creating low density pressure.
Anyways my email is
phillip.gantz@gmail.com
phil