RR Racing has pioneered Lexus ECU tuning. We were the first to release a tune for Lexus ISF in 2015, then the first to tune the RCF and GSF, we then developed the tune for Lexus IS350 2006 to 2013 and finally IS350 2014 through 2017. Last year we introduced the best tune for Lexus IS250 available anywhere. So needless to say, we know a thing or two about Lexus tuning. We would like to clear some misconceptions customers have regarding tuning a Lexus, as well as answer some FAQs. Some of these are based on experience they may had with older cars, and many of these are based on erroneous information they get from other tuners.
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Improving Knock Learning and Power on Lexus ECU’s
I just thought I would share with you some of our experience with KCLV and some ideas of how to improve it. For those of you who haven’t heard of it, KCLV stands for “Knock Correction Learn Value.” It is simply a long term ignition correction factor. After you flash your car or reset your ECU, the KCLV goes to 15. Once you start driving the car, particularly doing long pulls at high load, the ECU starts bumping the KCLV up in small incremental steps until some knock is detected.
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