l0ch0w":35ha6xh0 said:
The gen IV has the highest volume flow of any of the 3s/5s pumps and its got the correct location for the crank position sensor. You can actually order these from the dealership at a reasonable price.
Since when?
Ive been researching this build for the last year, and this is the first time anyone has ever said anything about the gen4 oil pump being the best.
Why do you say the gen4 has the "correct position" for the sensor?
By that are you saying the +98 5S oil pump crank angle sensor isnt in the right position??
Looks like ill be buying a Moroso sump too, so having the 5S pump works out well for that.
Your Water pump will work just fine, but you need to be sure to use gen 3 hardlines, and then fabricate them to bypass your oil cooler.
I will be using the gen3 bypass lines, as obviously the gen2/5s wont fit on the back of the gen3 pump.
Modifying the bypass lines for the oil cooler is actually the wrong way to do it though.
The gen3 cooling system is much advanced over that of the gen2/5S and even gen4 with it having the oil cooler supplied by coolant from directly from the block. It gets a lot more flow this way compared to the gen2/5s system of having it supplied by the bypass lines.
Ill be copying this by having a supply pipe brazed into one of the welsch/freeze plugs.
Check out MR2Josh's build out on the mr2oc, hes doing a gen 3 head onto a 5s block with a gen 4 oil pan and pump. The caldina head is almost identical to the gen 3 head except for the TDC sensor and distributor delete.
Actually its not.
Caldina head has different shaped combustion chambers and slightly better shaped inlet & exhaust ports.
Thanks for the comments though... the more discussion on these topics, the better