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I have been comminucating with my hardware folks about a few quirks with the emulator and our ECUs. The revision on the board is 1A. :) It is very new and now we are going through the R&D to get it right. The device works, but it has a few hangups.. For one, it uses a .047 fahrad capacitor to retain the memory chip with the code in it. That is only enough juice to sustain the ram chip for abouut 12 hours. They are integrating a small rechargeable battery and a charging circuit to keep the battery up to snuff. It will be able to go for years before it gets low enough to erase. I played around with my Buddy's stage 3TTZ (with stock injectors, turbos, intercoolers, etc) to develop a set of maps. Well, we used his gtech as well, but we felt obvious differences. I started all of these programs from stock 1993TT programs. Simple modifications here and there to change the fuel cut, rev limiter, speed limiter, etc etc etc. The maps aren't properly scaled so I stretched them out to cover higher volumes of airflow and higher levels of RPM. I built base maps here at work which actually retard ignition timing quite a degree from the stock program. Nissan set it to run at ~24 degrees of timing at peak power. No wonder the engine cant run more than 12psi on a stock program... The ignition simply gets too far advanced. On top of that, there is insufficuent fuel flow. At any rate, I made two programs for his car and when we got home we loaded things up. Stock JWT chip (that he owns)on the GTech was reading 338RWHP at 14.0psi of boost. We pulled the chip and slapped in the Zemulator loaded with one of my programs. The first program I wrote had significant increases in ignition timing, from 16 to about 20 across the powerband. In addition fuel delivery was up ~40% to put the A/F at about 11.8:1. The second program ran it a little bit leaner at about 12.2:1 ratio at full boost. We cranked her up and took off down the road. OMFG. Gtech registered 359RWHP! O2's were running ~.81V each. No knock. No ping. Sounded like a beast! :) A little rich, but keeping things safe is a good approach..
We fine tuned the ignition and fuel maps in a couple of places and took her for another run and squeezed another 4HP for a total of 363RWHP. Saved that program and loaded up the second one. Withthe second program, running it a little less rich (~12.5:1)the first run we pulled 361RWHP! So then we played with the timing a little more, bumped up the ignition timing another degree through the 4500-4900RPM range and loaded up a little more fuel there. That's where his engine was hitting peak volumetric airflow. Took it for a run and gtech results came back with a whopping 368RWHP! This was a 30HP gain over what he was running with the JWT program! He asked me to burn him a chip to put in there so I did and he called me back just a moment ago to tell me how bad his shit is. :) Granted the GTech is probably inaccurate, but running back to back runs under the same road conditions and seeing gains happen may not give you the actual HP readings, but what it does show are the consistent changes from one change to the next. This tuning is making VERY noticeable differences in both the GTech and the Butt Dyno. I will be recieving the next version of the hardware monday to play with. It will have a few of the kinks worked out as well as a long life battery system of its own.
[ ashleypowers.com ]
[ agpowers@bellsouth.net ] When pigs dance, you better get it on video...
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