Got to ask - Why do you guys put so much emphesis on the strength of these motors...In all my years of Lexus and Toyota forum reads I am still yet to see a busted stock rod or piston on any of these above mentioned UZ motors... I think you guys should be addressing the tranny's, driveshafts, rearends, etc.... I just have not seen or read about any engine failure from pushing too much horse power on these motors...
Granted you boost out 600-700rwhp on one, then sure the engine may then bust a nut or something, but in order to produce that much juice you need one hell of boost setup and supportive drivetrain...
I challenge any of you folks to show me busted stock rods or pistons on the xuz.. motors from pushing too much horsepower in tune of course..
Please prove me wrong, because I can't bust anything on my stock internal 1uz-fe motor, and I have upped the NOS shot, all external mods, torque converter, traction, everything to create massive stress on the motor and it still purs, but now does burn oil... Still, No engine failure, ever.....However, everything else around the car has broke down or failed from the increased power output on my SC4, but the engine still holds strong...
With probably now pushing slightly over 500ft pounds of torque I have managed to break parts on my SC4 in this order....
1) Lug nuts and rear spindle failure (with 500lbs of sandbags in the trunk)
2) Drive shaft (too much play) had to rebuild
3) transmission failure (automatic) gave up the ghost had to rebuild stronger
4) Piston rings wear is evident (approx..one quart every 1000 miles now)
No ENGINE failure, even with Big Nos jerks, fast and long redlining, I really just thrash and abuse this motor as best I can and as often as I can. I can't break it. With all that being said I am so damn impressed with it's strength and durability....
Just a little food for thought on this post as I was once was hung up on the "oh can the engine handle the power" too.... I say boost away and don't sweat. I strongly dought a piston will crack, a rod will fail, or a head come flying off the motor......
OH - JUST WANT TO SAY HAPPY EASTER TO ALL THE FELLOW LEXTREMER'S!!!!!