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| Naji installing our Innovate Motorsports LM-1’s sensor. |
To tune the car we needed an accurate tool for logging our air fuel ratio. We used Innovate Motorsports LM-1 wide band air fuel meter and interfaced it with EVOscan, another bit of shareware available on the internet. All this cool shareware make you want to rush out and get an EVO? You bet! We hooked up our LM-1’s sensor to the bung we had already welded into our exhaust system with our last map flashed into the first map location and off we went tuning.
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| Our downpipe has a stainless steel bung we got from Burns stainless welded in place for quick access when tuning. |
Naji fist tuned our boost table so we could get the same boost curve as we had previously with the two port using the three port solenoid. We had previously let our boost spike to 25.5 psi and then tapered it to 21 psi. We were able to match this and smooth the boost curve out with the 3 port. We also reduced our boost between 3400 and 4400 rpm because we were experiencing severe compressor surge due to our 4G63 was spooling so fast! Our 3 port allowed us to tune most of the surge out, something that the 2 port was not precise enough to do. This was flashed into our first map which is our pump gas map.
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| The Innovate Motosports LM-1 is one of our favorite tuning tools. It interfaces with EVOscan so we can datalog our air fuel ratio. |
With our pump gas map programmed, Naji turned his attention to our water injection map. We had decided to tune for just plain water. We are not after every last bit of performance and we don’t want to mess around mixing methanol and water or buying special concoctions for our water system. We know that we could probably gain another 10 hp with methanol but we didn’t want the inconvenience of it all.
