omni86

pressure load inacurate terminology. fwd/rwd components that differ aside from space issue, differ for reasons. Like you said rwd pump ribs/bearings for rwd's fan/clutch. I was under the impression it also has to do with circulation. Bearings I also understand prevent failure over the 5.5-6k rev range on a rwd setup and was reccomended not to use the fwd pump. If the fwd pump is"better" for flow, I have not heard of it as a common rwd 4age "upgrade". rwd pushes fwd pull. the displacement of power through driveline to rotate a r wheel one turn. in contrast to a fwd which has a more direct output. The fx off the line is faster than my gts coupe both stock. the fx can't uphill or downhill corners as well but is quicker to repond at lower speeds than the rwd gts. the ae86 coupe and ae82 both have identical largeport tvis 4age's both 87's even. the range of displacement is very noticeable in the fwd/rwd setup. its a combined effect from gearing but the trans/axle and trans driveline to rear axle require different ranges of torque for one drive axle rotation. Blocking is proper. I haven't had any issues from bypassing the heater core it is functional.

Someone mentioned while i was doing the conversion. That because of the rwd layout there is more resistance for one engine rotation and that is why fwd/rwd pumps have different bearing sizes/ribs. To cycle at different rates. I guess my question was why do they have different size pumps? Mixed answers and non descript in most fwd/rwd conversion post I read up on at the time.

It's important to convert the water pump to Rwd. It very well may be your problem. I did a lot of research when doing my conversion from a fwd 4age to rwd. Rwd is always running a higher pressure load on the engine by enough for the pump to make a difference. By passing the heater core is common, I did the same. Always good to double check the hose. To work out air when doing the rad, cut the end off a 2litre and raise water level well above the radiator. Also to work out air, 1 remove rad cap and put it back with out tightening it, to allow air pressure to build and bubble out. Also a plastic bag with a few small holes rubber banded over the rad filler can work.

Will a ae82 fx gts wiring harness, primarily engine bay harness fit a ae86. Sr5 to gts conversion. The ae82 is 3.5in wider from strut tower to tower. The ae86 body is only about 6in longer. As far as the engine bay harness would fit, maybe front lights extended. Anyone familiar with this harness swap? Ive heard the ae92 harness needs extending to be used. thanks for any input.