Maybe they work better as a puller vs pusher,Im unsure.The following is a review for these fans at the link you posted and eventhough its just one negative review vs others that were positive,the poster made some valid points that seem to parallel your setup.Theyre shown in bold text.A review is also gonna be written using the experience that one person had with his particular year,make,model,engine & modifications.So his experience is gonna be quite different from others who have a totally different setup.
*** While these fans are quite slim, they do not move very much air at all,especially in "pusher" mode they come with NO instructions at all so you're just supposed to know that for them to have any hope of working as a pusher you need to remove the bolt in the fan and flip the blades over that makes them work just a hair better but they still suck horribly. on a 74 degree day just idling in my driveway, AC off, with 2 of these going almost non stop my car was barely keeping cool. the fans were touching the radiator with NO gap and the radiator was clean inside an out with fresh coolant and no air in the system. These fans were literally on more than they were off to keep the car between 185 and 191 (I have a data logger ECU). the stock fans were much much better but they were big and in the way so I was trying these instead. The important info that's left out is that the CFM is with ZERO blockage.As soon as you put a fan in front of a radiator the CFM drops due to having to push the air through an obstruction. the slimmer the fan, the less pressure it can make to keep the CFM up
With these little slim fans's, CFM drops like a rock as soon as they have to do any work. The design is fairly poor as well. The blades could have been wider and slightly longer making them much more efficient without changing the overall dimensions of the fan at all.The motors only drew about 6 amps as well so beefier motors would've helped alot. If you only have 2.5" of room I guess try them out but keep an eye on your temp gauge***
I wonder if temps would go down if you temporarily removed one of the fans (as a test) & got the car on a highway or road very close to your house that will allow you to travel at a great enough speed to allow plenty of airflow to the radiator?? You wouldn't want to do it if theres alot of stop & go traffic between you & the highway.This might help determine if the fans,being mounted in front of the radiator,are being more of an obstruction to airflow through the radiator than the engine can handle.The review posters point about the fans slim dimension having a negative affect on just how much air the fans can even push,is indeed a valid concern,especially considering your radiator is a thicker 3 row unit.Is lack of space between the engine and radiator the reason why you mounted them in front or was there some other reason?? Just curious if they could be mounted on the engine side of the radiator?? I dont see any mods on your engine that would create higher coolant temps than what a 86-95 Mustang normally sees.Proper shrouding is very important to cooling in the 5.0 in these models,so is it as important in a classic model with a 5.0 too?? My 91 & 90 (sold) models have always run below 200°,in stock and modified condition & I my cooling system isnt as nice as yours.Is your base timing (spout plug removed) set between 10-14°?? Is a squared off corner of head gasket showing on both of your heads,where the head meets the block?? Ive seen one gasket orientated incorrectly on quite a few builds.
91 LX 342ci (10.5:1)
TFS 190cc (stage ll)
GT40 (tubular) intake
Weld ProStar XP's