I have installed PPE headers, exhaust and F sport intake.

The car pulls harder and is alive after 4000 RPM and the exhaust note is music to my ears after 4000.

The car idles fine and has not changed at all, feels stock.

My question, videos online and people I talk with say a tune is a MUST after all my mods, I am not planning on doing a tune, will this effect my motor long term?

If I have to do a tune.

I am in Sydney Australia, not many Lexus tuners around I was thinking RR Racing tune (headers, intake, exhaust package) mailed out and file emailed out. Do you think this is safe and recommended way to tune ?

 

I've had no problems with my RR Racing Tune. I'd definitely look into it. Else there may be other tuners out there, since one of my friends says he just got maps for my platform recently so if you're looking for a custom tune it's worth asking around.

 

Thanks for the reply.

Do you think it's a necessity to have a tune after headers and exhaust?

Did you take your car into RR Racing or installed turn remotely ?

 

Unless you're trying to milk everything possible from the 2GR-FSE I'd say no. The MAF and o2 sensors will meter fuel just as they did. If you get a base tune, it would be through data logging that you dial it in I'm not saying dyno pulls won't do but they are not the same as the street.

 

Mate please read from these links :

RR Racing
http://blog.rr-racing.com/news/2017/...on-lexus-ecus/

 

So this means that MAF & O2 sensor in combination with ECU will relearn the greater flow of intake /headers + exhaust and pump in more fuel to compensate?


When dialling in a tune, I will need to send a data log from a dyno run and RR Racing and patch me a tune?

What sort of KW/HP at crank do you think I can expect, based on my set up?

 

Sorry for the stupid question, your saying I should be a tune to improve Knock Learning? In the blog running injector cleaner fixed the problem or carbon build up, so main reason of the tune is to protect against carbon?

 

Please read the article more carefully, so you can understand what RR racing is saying. Also, I provided 2 links, not only 1.

No one is saying you need a tune for the mods you have, period. A Lexus ECU adapts to a lot of things : engine condition, fuel quality, ambient temp etc. What their tune simply does is open the upper limit of the stock ECU settings, it is up to your engine and the conditions I listed above, to be able to reach max potential.

The car mentioned in the article had carbon build up, so the knock sensor adapts and retards timing, decreasing max tuning potential. After carbon clean and injector clean were done, the engine knock sensor adapts and the tune made full use of this.

Pardon me if I do not explain it very well. In summary, the better the conditions, the better the tune will increase power. RR Racing stated that if a tuner says that they can do a custom dyno tune, they may not fully grasp the way our ECU works.

 

Thank you very much, I appreciate the effort to explain this to me, 100% very clear on how a tune works and Lexus ECU learning capabilities...

RR doesn't like to quote any figures, but the evidence I have found across the net expects a estimated 10-15 KW gain @ crack

 

Check these links from their site;

https://www.rr-racing.com/RR-Racing-...ig3xxtne17.htm
https://www.rr-racing.com/RR-Racing-...ig3xxtne02.htm
http://blog.rr-racing.com/news/2019/...ning/#more-818




Seems the IS300 gets all the better benefits since they have exactly the same engine with IS350 (Generation 3). Some are saying the IS300 is a detuned IS350.

In addition with the REV limiter (7200rpm), with this tune, the IS300 also become very close (if not the same) to an IS350 stock performance. I have this tune on my '17 IS300 and the difference is night and day.

I have read from some sites that whenever you upgrade the headers, you must tune the ecu but I'm not sure with lexus ecu since I heard that it checks and relearns everything after a ecu reset.

 

From looking at data logs before and after the tune it seems the bulk of the changes are the ignition advance maps. Like Lexus took a conservative approach for longevity or whatever and the tune allows a bit more advance. Which reminds me I need to write them and see about leaning it out just a bit. The tradeoff could be knock / advance pullback as the 12:0 AFR likely suppresses that tendency by cooling the air charge. My street bike has nearly the same bore/stroke ratio, head design but lacks DI and is very happy at 13.1:1 AFR vs 12.0. Anyone try this? It might be great in the winter and hurt it when ambient temps hit 90°F.

 

There seems to be a considerable variance 2006-2012 vs. 2013 onwards for IS350. The 3IS seems to extract more HP from the tune even know its the same engine platform. Nonetheless I am now convinced to seek a tune within the next couple of months.

Could some please kindly explain the process of receiving and installing the tune. I have read by providing RR Racing with data from your car, they can fine tune the tune for better results. They mentioned that data from a dyno log vs. street driving are different, and best to tune on street data. How do I go about tracking and supplying data from my car?

 

Do it and guaranteed you won't regret it. Contact RR Racing, they are one friendly team.

 

You receive the OBD tuner, plug into your car, it’ll upload your region specific ECU. You plug reader to your computer, email the data to RR Racing. They will then email back with the tuned file which you upload to your car.

You do not need to supply anything else. I believe the tune is the same for all IS350, they only need to check for your ECU region ID. Australian ones are pretty much JDM.

You still do not seem to grasp the concept of how RR Racing tune works, as you are still asking about the same thing as before I provided the website links. Please read them again 😄. They have done hundred of hours datalogging for you, the tune is the result of that.

i think the only time they need to update the tune is when you go with their supercharger.

 

In some cases, there is a need to ship your physical ECU so they can pull data from it. That said after years of collecting data they have pretty much covered them all.
Mine being the last of the 2IS crowd is 1 of 367, 2013 350 RWD's was that case.

I've just been too busy to deal with car stuff but I would like to know if the fuel MAPs can be leaned out to say 12.8:1 or 13:1 and what impact that has on ignition timing vs tq.