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The question is just how capable is the engine, can it handle it long term? I mean reliability is pretty big with lexus and I feel any gains in HP is not really worth it if you can't safely run it for say 5+ years. I plan to keep my is350 for a long time, would love more power but wouldn't trade reliability for it. Could have gotten a 340i if speed was that important.
I'm sure it's capable. hypereutectic pistons as well as piston oil squirters make it super reliable and very capable for more than just a tune (RR racing are currently running 420 whp with their supercharger with loads of track day miles). Comparing it to 340 is a whole other story, you're replacing speed for reliability, when you can have a middle ground for both with what's happening here. Toyota threw a supercharger on this engine for the Toyota Mark X in 09, if it can survive supercharging im sure it can survive this tune.
I like the tune, if you want more info you can PM me and I'll give you the whole run down. To answer your question, yes it does void warranty but only if they find the tune. So if your engine we're to blow up or something you can just pull the file and they won't know. The tune so far is safe, no reason for it to damage the vehicle, it's dependant on the driver. Don't red line all the time and don't keep it at red line too long.
hey ru I just bought the rr tune , r u still liking it , any recommendations ?