the earlier 'bigport' (aside from the MR2 version, and early AE92 version with the 7 rib/bigport combo) 16v motors are said to be weaker because of the smaller big ends (40mm) and gudgion pins (18mm)..and they say the 3 rib block is weaker than the 7 rib block..the later 'smallport' motors have the 7 rib block, with it's bigger internals.. 42mm big ends, and 20mm gudgeon pins (all GZE, and 20V share these) 20V have lighter rods, there are alot of minute differences between the 100kw and GZE rods, but for arguments sake we will say there the same (as in size of big ends etc)..
on one hand the earlier motors are weaker, but because they have less internal mass, they feel as if they rev quicker than the 100kw generation..they overcame this with the 20V with it's lightend rods etc..
16V for me..i would like a 100KW smallport motor, with 20V rods, and quads (i'll see if i can get me some rods for project revs, they have a very nice rod..the 20V i mean)..20valvers.. good in theory..but toyota quote them as 165-170hp (depending on sources) and the 100kw ones..well thats 134hp.. yet they seem to post very very similar dyno figures..yes yes i know dyno's can be fudged, and there not really a good gauge for power..but even on the drag strip..they post similar times to a 16V with the same mods..
Matty..
