Luxury to F-sport steering/avs ECU conversion
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Luxury to F-sport steering/avs ECU conversion
Hello everyone!
I want to buy used GS350 AWD '12-'13 and I'm choosing between 2 cars (both AWD) - one with the Luxury packet, another with the F-sport package. I really like the car with the Luxury packet more (color, complectation, mileage), but the car with the F-sport packet handles better! And handling is important to me, as for the past 7 years I drove sport-tuned Infiniti G35x '08 sedan, sometimes going to track.
I investigated, that Luxury and F-sport cars have the same spring and shock absorbers (part-numbers match), but they have different ECUs for steering and absorber control (part-numbers are on the pictures).
I beleive, these ECUs contain "special F-sport tuning", so in sport s+ mode wheel gets harder and shocks stiffer. The same thing is done retrofitting IS-F steering ECU to the IS250/350.
ABS/VSC ECU is the same, but maybe the main ECU would need some F-sport tweaks (though, I couldnt find the main ECU on schemes and check the partnumbers)?
I want to buy used GS350 AWD '12-'13 and I'm choosing between 2 cars (both AWD) - one with the Luxury packet, another with the F-sport package. I really like the car with the Luxury packet more (color, complectation, mileage), but the car with the F-sport packet handles better! And handling is important to me, as for the past 7 years I drove sport-tuned Infiniti G35x '08 sedan, sometimes going to track.
I investigated, that Luxury and F-sport cars have the same spring and shock absorbers (part-numbers match), but they have different ECUs for steering and absorber control (part-numbers are on the pictures).
I beleive, these ECUs contain "special F-sport tuning", so in sport s+ mode wheel gets harder and shocks stiffer. The same thing is done retrofitting IS-F steering ECU to the IS250/350.
ABS/VSC ECU is the same, but maybe the main ECU would need some F-sport tweaks (though, I couldnt find the main ECU on schemes and check the partnumbers)?
Last edited by harp00n; 05-24-16 at 02:32 PM.
#3
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Well, I searched all the topics here about Luxury vs. F-sport differences and found the video from the official Lexus presentation that on F-sport models (both RWD and AWD) adaptive suspension works differently (faster, though a little bit stiffer) than on Luxury models. And some people wrote, that steering is stiffer too on F-sport models (in S+ mode).
#4
Lexus' brochure specifically mentions "F-sport tuned AVS" compared to the Luxury package only having "AVS." i.e. I agree you're on to something, though I haven't yet heard of anybody who's done that swap nor what the exact differences are.
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