I'm going to do a little friendly necro-bump on this thread.
I'm not claiming to be an expert in anything presented in this thread, so feel free to tell me I'm full of it *if you can point out why*.
I have a fun pipe-dream of throwing a turbo kit on my DD 05 2GS. Nothing crazy though, 400rwhp would be on the high end.
This thread is the first I've ever read anywhere claiming that the VVTi GE has weaker connecting rods than other 2JZ's, and said claim being made by one person (although I realize said person is a lot more experienced in working on these engines than I do). Still, that's the first I've heard of it.
Have VVTi GE's shown themselves to actually be weaker and less reliable in practice, or just in theory? Do we have any actual examples of VVTi GE's popping their connecting rods or showing themselves to be less sturdy outside of theoreticals? Apparently one guy is making 800rwhp on the 'weaker' engine, which is twice as much HP as what I would be wanting, so it must not be that bad. Someone stated that they could pry off pieces of the internals with a screwdriver, but as long as I'm not throwing screwdrivers through my intake I don't see how that's relevant?
Here's the point I'm getting at: I'm not looking to make a 900rwhp monster. I'd be happy with a 350-400rwhp setup that's still daily driver friendly but a blast to drive. Going through the process of swapping in GTE engine, and then having to completely rewire all of the pins (yeah...screw that) seems like overkill for my goals. Is there any actual observed instances of VVTi GE's not holding up reliably with a mild turbo kit compared to a GTE, or it only in theory?
Apologies if I'm re-poking the hornet's nest here...
edit: someone was nice enough to post this link that showed the weaker connecting rods:
I'm curious why Toyota went with thinner connecting rods with the VVTi? Best guess was for less rotating mass to eek out a bit more gas mileage efficiency (shrug)?
I'm curious what the actual net effect is on reliability, though, since everything else is the same. If people have gotten 800rwhp out of the 'weaker' connecting rods, then they must not be total junk. Surely a more DD friendly 400rwhp build wouldn't be a problem by that measure, wouldn't you think?