The 2JZGTE clutch is not too big. The reason is that the ring gear is behind the friction surface, (look at attached pics) which works on engines which have the starter mounted on the engine side. I suspect the friction surface in the 3S clutch is much smaller because it cannot do this.username said:Honestly, I will look into the 2jzgte pressure plate size and clutch size. This may work. However, I have a feeling that the clutch is going to be too large for the 1uz ring-gear, and honestly, I dont think it is necessary.
Also, has anyone checked if the 3S fflywheel actually fits on the crankshaft properly, and the hole in the center of the flywheel is big enough to allow the input shaft poke through? Do you have a pilot bearing picked out?
The 2JZGTE flywheel is perfectly "hub-centric" on the 1UZ crankshaft. It's almost as if it were designed to be used for this (expect the smaller ring gear). Even the 2JZGTE pilot bearing fits in the 1UZ crank perfectly.
IMO, I'd rather worry about weight later and have the largest surface you can get now. A 2JZGTE single kevlar lined clutch disc and heavy duty pressure plate will hold 700 hp. I would much rather have that then a metal based clutch disk (speaking from experience). A metal based disk will also destroy that flywheel in no time. A kevlar disk will barely harm a flywheel.
Contrary to popular belief, lighter is not always better. You do not want to go too light on the flywheel. The flywheel I am working on should not be heavier than 15 lbs, which is still 20 lbs lighter than the stock 2JZGTE flywheel.
I just spoke with Rob from RPS, and hopfully in about a week he is making another run of 2JZGTE flywheels, so that's when mine should get made. Basically all that needs to change is make the crankshaft holes farther apart and the diameter of the flywheel where the ring gear attaches a little larger -that's it (I sent him the proper ring gear from a 1UZ flexplate).
However, I don't want to discourage anyone from trying something different, even if you can't get a group buy and have to pay extra for a one-off (like me). It's worth the effort to have more than one solution. The 3S based flywheel will probably be much cheaper and may better suited for a W58 tranny, clutch, pressure plate, while the 2JZGTE flywheel may be better suited for a v160 6 speed and its (different, pull type) clutch & pressure plate.