suginathan

I initially wanted to buy the 2015 or 2016 IS350 F Sport because I liked the power the IS350 had and the F Sport just made the car look extra cool! After looking at the prices and the minimal availability of the IS350, I considered getting the IS300 for the price and using a ECU Upgrade tune up, as shown in the link below, which should give it 10hp more than the IS350. Would this be the right way to go? Also, does this affect the car in any other way long term? I am also assuming it would void warranty?
http://www.rr-racing.com/v/mobile/pr...tid=IG3XXTNE02

anthonys2r

iTrader: (1)

There is no such thing as the 2015 IS300

suginathan

Sorry, I actually meant the 2016 IS300.

minhael

That RR Racing itself won't give you more HP than the 350. You need the full bolt on (Intake, Exhaust, and Header).

sarcoptic

Incorrect...a 300 with the RR Tune should produce more hp than a stock 350. That is also why RR sells the same exact tune for the 350. The 300/350 engines are identical. The RR Tune is by far the best performance mod any IS300/RC300 owner could do.

sarcoptic

Yes your math is correct. It will void the warranty, but RR sends the tune to flash the car back to stock if you ever need to. I did the flash on my RC300 and it pretty much unlocks the car to its true potential and a huge difference.

rasbidhi

Hi sarcoptic,
Just curious about the benefits you've seen from the ECU upgrade.
Does it improve acceleration from the start, or just when you hit the higher RPM's?
Have you seen much change in fuel consumption?
Any feedback would be appreciated.
thanks!

sarcoptic

Fuel consumption hasn't really changed much in my ride...mostly highway miles still getting 23 - 25 ( I do have an RC300 AWD). The tune is absolutely fantastic. It was enough that the wife even came back from shopping and asked what I did to the car. It gives the car power and torque through the entire gear up to the new 7200 rpm redline. It removes the dip that is shown on RR's site on the 300. The rest of my car is stock and has by far been the best $550 I spent. Simon and Rafi have been fantastic in email communications and RR Racing overall has a very good and strong background here on ClubLexus. This is by far the best hp for the $$$ for those with a 300. Forewarn though that RR does have a 350 AWD for their test car meanings its the 6 speed. From what I understand some of the RWD 8 speed trannys are having slip issues, but they are trying to resolve that.

sarcoptic

Oh hey look a video of "someone" going from 0 to 100 with an RC300 AWD and the RR tune...hopefully this helps get the point across

scubastevo

I thought RR's updated the redline/shiftpoint to 7200rpm... this one is shifting in the 6's. Is the increased redline only for manual shifting in sport+?

sarcoptic

Good question as I see what you are referring to...I did some looking on RR site and they do note:

• We raised the shift points to higher rev limits in Sport and Sport+ modes (rev limit can only be reached in manual shifting with traction control off)

So with that in mind I will try to take another video with the traction control off and manual shifting. I will try to do it here soon as its been getting hot in the day here in Iowa. So I guess its a clip of how the car acts in auto mode

scubastevo

Thanks and good to know. I am looking at picking up an 3IS in the next year and am debating between the IS200T and the 300. I plan to keep the car for 10+ years so I'm still weighing my options. The 300 is a consideration solely because of the RR tune, and I'm glad to hear it can be driven normally and more aggressively in sport mode.

arentz07

Hmm, what's up with the exhaust note on the video? Sounds fake-ish.

In addition, the raised rev limiter is cool, but does the tune actually give you more power in any other regard? Acceleration time seems about the same as stock.

rL-gT

Agreed. Running the RR tune on my 2016 IS300 and loving every moment of it.

Viktimize

I'm pretty happy with mine too. Increased torque right from a stop. And one thing few people ever mention that I like, is it gets rid of that terrible throttle lag you get from a dead stop.