New Project Supra

[pwpanas]

Originally Posted by Twin Turbo '95

damn. and here i thought a aftermarket piston would hold up a bit better..

i poked around and read a shit load of topics(again.. read all of them )

TO4R.COM

ok he says what happened. hose of the wastegate popped off...

In other words, he ran too much boost for the octane of fuel he had in the tank. I'd bet any money that if he'd have been running pure 116 octane race fuel, his engine would have been in perfect condition afterwards. My guess is that he was probably running pump gas...

Originally Posted by Twin Turbo '95

...TO4R.COM

he didnt say what happend.
IMHO. i think it would be something too do with the heat in the desert.. pre ignition...

Although external heat is a factor, the engine won't pre-ignite or detonate even on the hottest day, if you're running a sufficient octane level to match the boost level.

Originally Posted by Twin Turbo '95

...TO4R.COM

he ran a bit lean. ...

Yep bad tuning will kill you every time. For what it's worth, I already mentioned this in post#2, above.

Originally Posted by Twin Turbo '95

...NOTE: they all had a piston 6 meltdown. not any other. 3 guys. same pistons. different reasons. imho. I think that if i get the fueling right for the #6 piston then it'll be ok once i start modifying it

You're sort-of on track. The problem is not the fact that #6 isn't getting enough fuel. The problem is that #6 is getting too much air, because the oem intake plenum is not designed for high boost (eg. 750rwhp+). This is why all big turbo'd mkivs run aftermarket intake plenums (along with race fuel, and proper tuning).