Parade Fan Mod
Thread Starter
|
Road Warrior
Joined: Jun 2009
Posts: 1,943
Likes: 3
From: NYC
Parade Fan Mod
The default install of the parade fan blows the air from left to right. Which basically results in hot air blowing across your o2 sensors as well as into your intake. A real problem if you have lowers. Even more of a problem if you have a stage I kit and you kept your egg shaped intake cover as suggested by Harley. That cover with a default parade fan install only serves to catch hot air being heated by the engine.
What to do. I reverse the wiring on my parade fan. The air now blows from right to left. Cool air is drawn into the intake and cooler air runs across the O2 sensors.
The bike runs cooler since we no loner have a convection heated intake air loop of continual hotter air.
What to do. I reverse the wiring on my parade fan. The air now blows from right to left. Cool air is drawn into the intake and cooler air runs across the O2 sensors.
The bike runs cooler since we no loner have a convection heated intake air loop of continual hotter air.
Road Captain
Joined: Jul 2009
Posts: 583
Likes: 2
From: Eaton, OH
The oxygen sensors are not located between the cylinders anyway, at least on my bike. They are in the exhaust header just an inch or two from the cylinder.
There are three items between the cylinders on my bike. Two of which I believe are the fuel injectors and a third located on the left side of the front cylinder. I'm not sure exactly what that one does.
Blowing warm air towards the intake is how the fan is designed. Whether or not that has a negative affect on the temperature of the motor needs to be determined. I am also wondering if blowing air across the cylinders would be more effective for cooling than sucking air. At this point I would guess that it would be more effective blowing than sucking.
There are three items between the cylinders on my bike. Two of which I believe are the fuel injectors and a third located on the left side of the front cylinder. I'm not sure exactly what that one does.
Blowing warm air towards the intake is how the fan is designed. Whether or not that has a negative affect on the temperature of the motor needs to be determined. I am also wondering if blowing air across the cylinders would be more effective for cooling than sucking air. At this point I would guess that it would be more effective blowing than sucking.
Thread Starter
|
Road Warrior
Joined: Jun 2009
Posts: 1,943
Likes: 3
From: NYC
I am also wondering if blowing air across the cylinders would be more effective for cooling than sucking air. At this point I would guess that it would be more effective blowing than sucking
Road Captain
Joined: Jul 2009
Posts: 583
Likes: 2
From: Eaton, OH
I have not looked at the design of this fan but I do know that some fans are much more efficient at moving air in one direction due to the design and shape of the blades. I do not know if that is true of this fan or not. If it was, the fan blade would need to be reversed in order to maintain the same airflow.
I know that warmer air going in the intake potentially reduces the performance of an engine when compared to cooler air or we wouldn't have all the cold air packages available for all types of vehicles. I do not know how much impact, if any, the warmer air would have on engine temperatures, especially at idle when the fan would be operating.
I have this fan on my bike and it seems to do a more than adequate job of keeping the engine from getting too to hot while stopped.
Outstanding HDF Member
Joined: Jan 2010
Posts: 2,916
Likes: 31
From: earth
speakerfritz, it seems like a cold air intake is your prority, the reverse parade fan idea is just a way to open the discussion. You would need some type of shroud to make a puller work, probably could not make it attractive. The intake is situated tightly between the two heat generators, front and rear cylinder, so the entire intake tract, including the AC backing plate will need some type of thermal barrier coating to reflect radiating heat and the actual air inlet will have to be moved away from the hot engine. I would like to do this myself, but will it be worth it? Depends on how you define worth, I like to build stuff so it is entertaining for me, but this seems more like one of those mods to gain 1/100th of a second over the competition at the track. You could try header wrap just to test your idea, go for it.
Supporter
Joined: Dec 2006
Posts: 6,724
Likes: 234
From: Altoona, Pa.
Without the fan, the intake is pulling stagnent hot air coming of your engine. With the fan blowing cooler ari through the middle of the cylinders, at least the air will be some what cooler. Just recently, I hooked my computer up to my PC V to chck eng temp. Started the bike in the garage, left it run up to 264 degrees and then turned on the fan. Temp droped 22 degrees. Ill keep my fan working the way it was made.
Trending Topics
Road Captain
Joined: Oct 2006
Posts: 658
Likes: 23
From: South Florida
I think you're trying to re-engineer something that's pretty basic. Morris9982 has stated it correctly. The fan will move far more air blowing on the cylinders than it will pulling the air across them. I have the Lenale fan (it claims to blow air at 130 mph) on my Ultra, and the bottom line is it does a fantastic job at keeping the heat down when I'm stuck in traffic, even if the air intake might be sucking in a bit more hot air. These things are only so efficient. The HD oil cooler & Lenale fan are the two best mods I have installed.
DJK
DJK
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Cruiser
Joined: May 2017
Posts: 162
Likes: 32
From: Linton, IN
I lost the plastic fan blades from inside the housing on the fan, so I essentially have a big hunk of chrome now. I have no idea where to find a replacement.
If anyone had any idea where I can get a replacement fan (the blackplastic blades) it would be AWESOME! Thanks.
If anyone had any idea where I can get a replacement fan (the blackplastic blades) it would be AWESOME! Thanks.
