The torque is filled up at the bottom, and it just wants to rev now.
#LEXUS ECU TUNING MANUAL#
Sport mode with full manual is a joy to behold. And then you start getting into it, and its just next level. No hesitation, no having to floor it and waiting and waiting for it to wake up to overtake, its progressive now. The difference is all the doughy'ness of the throttle is gone, half throttle actually means half throttle, and it behaves like it always should have.
In "Normal" mode it cruises around quietly and sedately, a corporate sled with manners. I felt there was always a huge hole in the bottom end power curve with the ISF, and my dream has always been to fill that gap rather than chase top end 7,000rpm power numbers. I was honestly thinking of getting out of the car, and getting into something else with more lazy torque, more effortless power. Now please, PLEASE, don’t get carried away with dyno numbers, because to me having driven the car, it's just not what it's about with this car. The sound would not be as good as headers, and not as much power as headers, but significant none the less.Īt this stage the car was tuned, including removal of torque management, and adjusting of all throttle positions, like half throttle etc etc. The car sounds "cleaner" and "crisper" now that it did prior, and basically it sounds more aggressive, better.
#LEXUS ECU TUNING INSTALL#
This is pretty significant, a 13kw increase in power, which is somewhat comparable to an install of headers, for a tenth of the cost. With these two things done, he re-dyno'd the car, and saw 245kw at the wheels, prior to tuning. As you can see, this made a huge difference in what can flow through that section of the exhaust.Īt this stage, he also slotted in a K&N panel filter into the standard air box. So he cut the factory flange off, widened to 3 inches, and re-joined to factory mid section. So, after the baseline tune, Sonny told me that the stock manifolds cut down to 2 inches on the exit from the cats, and have a significant restriction at that point. But, only the gain really matters, particularly 1/4 mile etc, not the end kw figure. Even better would be to measure ¼ mile times, but alas, I can't do that! I know some dynos read higher than others, particularly the stuff coming from America seems to be a bit higher than Aus. As long as there is a definitive gain from mods, the actual number doesn’t particularly matter at the end of the day. I'm not particularly worried about the actual kw that is being achieved, more about gains from mods.
In this guise the car made 232kw at the wheels, which from my tuning experience is probably about right for a 311kw engine given drivetrain loss, maybe a little under what it should be.
Secondary cats had already been deleted, and resonator already deleted Here is some background on the car when taken to Sonny: He recently got the Lexus tuning software, and so I booked him in. Search for his channel "Sonny Duran" on YouTube, its pretty epic. He does a lot of work with AMG and other Euro cars, and everything else obviously as well. Sonny Duran from Autowerks in Beverly Hills completed all this work, for those who have been around tuning cars for a while will recognise him as a big hitter in the Aus / Sydney tuning world. So I am pleased to say that I have had a fully ECU written tune on the ISF.
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