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wandering albatross · 08-25-2016, 09:54 PM

I added a Spal 11 inch pusher fan on the front of the triple core radiator and it helped dramatically. I am still using the 12 inch Mishimoto puller fan with the aluminum shroud. The two work fine together.

Also, I added the Spal relay kit and tapped into the Civic's existing fan sensor. Both fans come on at the same time. The Spal relay kit is well worth the money - the quality is top shelf.

The 11 inch fan fits perfectly on the front of the radiator. If a 12 inch is used, it will "fit," but will rub against the vertical center reinforcement beam that runs across the radiator intake duct.

The only down side so far is that the Spal fan has straight blades and is much louder than the Mishimoto. The Mishimoto also has straight blades, but does not spin at the same high rate as the Spal and appears to move less air despite the higher CFM rating (~950 cfm vs ~1,100).

In the winter, I might pull the fuse on the Spal and just run the Mishimoto to reduce the noise. In motion it is difficult to hear, but around town, it sounds like a hint of a leaf blower. The curved blade fans are supposed to be quieter, but slightly lower CFM. Spal did not have a pusher in that size with the curved blades.

Here are the Spal part numbers that were used.
11 inch Spal pusher fan: 30101502 11" Medium Profile Fan - Straight Blade - Push
Spal relay kit: FRH

The high performance Spal fan has a taller motor by one inch over the medium profile that I used and will rub against the AC line that crosses the front of the radiator. There are three different motor heights (low, medium, and high performance). If you don't have AC or are okay with significant bending (medium profile requires moderate bending) of the AC line, then go with the high performance version for additional CFM.

I have done a moderate amount of testing in the mountains at altitude in the heat with the AC and it has not broken 50% on the gauge. I have a desert trip coming up and it will be around 110F so that should be an exceptional test.

Let me know if there is any questions regarding sizing, wiring, performance, etc.

08-25-2016, 09:54 PM	#15 (permalink)
wandering albatross EcoModding Lurker Join Date: Aug 2016 Location: Pasadena, CA Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts	I added a Spal 11 inch pusher fan on the front of the triple core radiator and it helped dramatically. I am still using the 12 inch Mishimoto puller fan with the aluminum shroud. The two work fine together. Also, I added the Spal relay kit and tapped into the Civic's existing fan sensor. Both fans come on at the same time. The Spal relay kit is well worth the money - the quality is top shelf. The 11 inch fan fits perfectly on the front of the radiator. If a 12 inch is used, it will "fit," but will rub against the vertical center reinforcement beam that runs across the radiator intake duct. The only down side so far is that the Spal fan has straight blades and is much louder than the Mishimoto. The Mishimoto also has straight blades, but does not spin at the same high rate as the Spal and appears to move less air despite the higher CFM rating (~950 cfm vs ~1,100). In the winter, I might pull the fuse on the Spal and just run the Mishimoto to reduce the noise. In motion it is difficult to hear, but around town, it sounds like a hint of a leaf blower. The curved blade fans are supposed to be quieter, but slightly lower CFM. Spal did not have a pusher in that size with the curved blades. Here are the Spal part numbers that were used. 11 inch Spal pusher fan: 30101502 11" Medium Profile Fan - Straight Blade - Push Spal relay kit: FRH The high performance Spal fan has a taller motor by one inch over the medium profile that I used and will rub against the AC line that crosses the front of the radiator. There are three different motor heights (low, medium, and high performance). If you don't have AC or are okay with significant bending (medium profile requires moderate bending) of the AC line, then go with the high performance version for additional CFM. I have done a moderate amount of testing in the mountains at altitude in the heat with the AC and it has not broken 50% on the gauge. I have a desert trip coming up and it will be around 110F so that should be an exceptional test. Let me know if there is any questions regarding sizing, wiring, performance, etc.