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Originally Posted by shorty_du_op
...The compression of the 2jzge motor can be taken down to gte compression with a thicker head gasket. Therefore the only difference is really the oil squirters...
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Yes, BUT if you lower compression with a thicker headgasket, the
shape of the resulting combustion chamber would be different than using an oem headgasket and 2jz-gte pistons! This means a 2jz-ge with a thicker headgasket won't make power as effectively as a 2jz-gte (or even a 2jz-ge shortblock with 2jz-gte pistons).
Again, the pistons are *
different* (not just a different compression ratio). For example, the 2jz-gte pistons have a channel to distribute the oil from the oil squirters. Although Toyota has been less than completely forthcoming on the details of the piston differences, most emperical results suggest that either the exact alloy of the piston, or the structure of the piston itself results in the 2jz-gte piston also being stronger than it's 2jz-ge counterpart.
Quote:
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Originally Posted by shorty_du_op
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Actually, the thread at this link details HOW to "slap" a TT head onto a non-turbo block, AND a complete list of everything you have to purchase. In fact, most of the items listed in that thread are normally included with a 100%-completely-assembled 2jz-gte head.
In other words (to get back to Dboz's question), yes you can put a 100% complete 2jz-gte head onto a 2jz-ge shortblock...and end up with a fully-functional 2jz-gte 'longblock' (again, other than the oil squirters AND the pistons). To get the 2jz-gte turbochargers (or a single turbo) 100% functional on that 2jz-gte 'longblock', there will be other work required too (eg. installation of the pressure cannister, runing oil line(s), and installing a 2jz-gte water pump). To get the whole package functional in your IS300 engine bay, even more is required, like (for example) a 2jz-gte power steering reservoir). The supraforums thread that shorty_du_op posted (thanks!) contains some very good informtion on the overall process.