QUOTE(Superhawk996 @ Mar 28 2023, 07:12 PM)
QUOTE(914werke @ Mar 28 2023, 04:32 PM)
You could use the Fan that is already in the Eng bay for additional flow?
Might not be quite that simple.
You need to be conscious that pressure differential dictates direction of airflow.
Example: if the auxiliary fan isn’t running - the engine fan will blow air out of the auxiliary fan - decreasing airflow available to the engine.
Similarly if the auxiliary fan was able to overpower the engine fan you could end up with degraded cooling. Not likely but something that should be considered. Probably would want a one way flapper on the aux fan to prevent that sort of reverse airflow - similar to the little flaps down on the heat exchangers.
What complicates this is that the engine fan is operating at variable speed while the auxiliary electric fan will operate at fixed speed. Might be hard to ensure the balance never results in airflow being pumped in the wrong direction.
@Superhawk
@914werke -simple thoughts from a simple mind)
i probably need to go back and absorb better some of what you posted i just skimmed it, but thinking about the different things here just a couple thoughts and questions,
and i am not an engineer nor did i stay in a holiday inn express last night, although i might tonight so i might have better thoughts on this tomorrow,
but for now,
my first question is about the air flow and pressure pulling/pushing air over the cylinders. It seems that the back side of the motor is a dead end, and so as mentioned before by others turbulence ensues, flow is disrupted , reduced heat exchange and extraction, if its + above and - below, can an additional fan below pulling air from above, or creating negative pressure how ever you want to say it, could this help? just like our pulling fan on the aux oil cooler? I mean a 50 degree reduction in head temp from acouple of 3/8" holes?? might not got hru the trouble of other approaches if its really that simple, but would a fan under pulling air from thetop down over and out help? seems it might.-
- thought #2: regarding the air from from the front impeller and the use of heat exchangers- is it possible that any air flow being directed out the bottom to the j-tubes and thru the heat exchanger(especially in warm weather when its not needed), if the little flapper is open and letting air go out below instead of all the air being directed over the top of the motor, this would in the heat of the summer hurt the effectiveness of cooling the top of the motor, less air flowing thru the top.
- also i watch my head temps and oil temps and you do see that when the oil finally gets full circulation as the aux cooler thermostat open and the extra oil flows the head temps decrease, ( in answer to another persons question about oil effecting head temps, yes it does)
-i have a 2.1 motor - i run 20/50 oil( high zppd valvoline dino oil )and higher compression etc so having the auxcooler is a must, even in 80 degree weather down in Amelia Fl a few weeks ago, my fan was not turning on so those oil temps went up a good bit idling in traffic, no air flow over the Aux cooler, i think it was around 230, but next stop i fixed the wiring to it and got it working and after that even sitting in traffic, and also under harder driving, it never went over 210, and head temps btw in this situation also were reduced.
I have new tin and alll new tin with new seals, spark plug hole seals in place etc. so just keeping it to the air flow issue, seems that allowing air to go out the lower side hurts flow to thetop, and maybe a fan under sucking air from the top could help? other wise any way to get air to flow better over theback side of the motor from top down should help - id like to see a picutre of where those 2 3/8" holes were placed as well.
Phil