2nd Fan mod....
- Thread starter BusaCruise
- Start date
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Yep... just a question if you need a complete second power supply circuit. (can the OE relay carry both fans)
The sensor just supplies a ground to the relay and so a second relay can just be hooked up if the OE relay can not carry the load of both fans.
Seems like you would be better off switching this manually to save the load on the electrical system
Here's the way that i do this mod. Here the link to my post!Second Fan
Theres a different way to do this, on the electrical side, the way that i have done several of them, along with my own bike is you wire the 2 fans together, the oem harness needs to be taped into. The factory wirering is able to handle the as long as you swap the fan fuse from a 10amp to a 15 amp!
Ill post up the rest of my pics later this week! of the fan being installed!
Theres a different way to do this, on the electrical side, the way that i have done several of them, along with my own bike is you wire the 2 fans together, the oem harness needs to be taped into. The factory wirering is able to handle the as long as you swap the fan fuse from a 10amp to a 15 amp!
Ill post up the rest of my pics later this week! of the fan being installed!
BATTMAN
Registered
There are several different ways to do this. you can use a gixxer fan, busa fan, or an old srad fan. The busa fan will have to be turned upside down to mount. Thats why most people use the gixxer fans....since they mount on the right side anyway. You will have to modify the mounts with any one that you use. You can wire them together or wire the second fan to a manual switch. the fuse will have to be upped to a 15 or 20 amp if you wire them together. You can also install a second temp aensor in the outlet tube of the radiator and hook the second fan to that. This way actually works best because the fan will kick on earlier. You cna also use a temp sensor from a Honda. It makes your original fan kick on earlier.
jeepinocala
Registered
Do you realy need the second fan? Mine only gets hot at stop and go traffic in the summer and then the fan kicks on and cools it fine I may just get a fan sensor that kicks on at 160 that way in traffic it will cool a little sooner.
Oilfieldtrash
Registered
Honestly with water wetter or engine ice is a second fan necessary? Are there 10 degree lower thermostats available?
Here's my post on this!
https://www.hayabusa.org/forum/engine-performance-mods/71945-second-cooling-fan-busa.html
https://www.hayabusa.org/forum/engine-performance-mods/71945-second-cooling-fan-busa.html
money mike
Registered
GREAT THREAD!!!!!!!!! about how long did it take you??
JShayabusa2006
Registered
What kind, from what model year etc and where is this located on the busa? Will the Honda temp sensor fit the same as a busa?
SkootRRgirl
Registered
Just got done doing my 2nd fan mod. It came out nice. Instead of going with a toggle switch I have both the fans running together, they come on more often and stay on for 10 second intervals. It sounds as if I have an AC unit hooked to the bike lol but they are working great. Glad I did it FINALLY!
Kevin Jones
Registered
My gen 1 fan kept hitting the turbo header no matter what I tried. I tried to make brackets to increase clearance but it just wasnt enough. Just as an fyi, I originally intended to replace my standard gen 1 fan with 2 gsxr1k fans to have more clearance. The tabs broke off the old radiator and I could only do one gsxr1k fan on the left side with some steel straps from Lowes, cut and grinded to make legs. It will work and keep your busa from overheating. I tested in Florida 100 degree traffic heat with full fairing on. I didnt push the envelope with Orlando type traffic in the FL afternoon (5 mins per stoplight, light at every 500m)but I did test it. Just keep that in mind if in a pinch. You can get by with 1 of those gsxr 1k fans. I found a gen 2 radiator with both fans on ebay in good shape for $100, will be installing that on my gen 1 next week. If anybody wants a pic of how I made the legs for the gen 1 radiator, let me know and I will show a pic. My radiator had a repair and I intended to replace at some point, just not this soon, lol.
Neophyte
Registered
I discovered this post today, even though it's like 17 years old already. I'm busy with a gasket refresh on my Gen 1 engine, and was going to install my own radiator fan control, by replacing the thermostatic switch with a temperature sensor, and then control the fan speed through a little microcontroller. That way I can program the temperature at which the fan starts running at 50% speed (through PWM) and if the temperature still increases, like it might in stop-start traffic, it will make the fan run faster, until it gets to full speed. Can't remember the full speed temp though. Together with this control I'll also add a little 0.96" OLED display to show the temperature and fan speed percentage.
Now, if I fit a second fan, then this variable speed method should work much better because of covering a larger area on the radiator, and hopefully the fan life will also be extended.
Now, if I fit a second fan, then this variable speed method should work much better because of covering a larger area on the radiator, and hopefully the fan life will also be extended.
