valenburg wrote:I was thinking about this the other day when looking under the hood of the Pathfinder. Do you guys think removing the belt driven fan and mounting up like a 12+inch electric (2200cfm) fan as a replacement would yield any type of gains or even any negative effects? My grandma had an 85 crown vic and that was a mod that some did on it and my 81 toyota corolla as well. It might help to run a bit cooler too since at idle the fan would still be at a good speed. Just a thought.
Whats the CFM of the current belt driven fan?
Based on my experience, belt drives are very efficient. Also, the belt driven fan is attached to a viscous clutch, making it even more efficient. (Clutch engages only when fan is required, the rest of the time the fan is in slip mode using next to no HP)
Not saying your idea doesn't have merit, but some seriously complicated calculations need to be done, with much of the data being unknown. You don't want to overcool or undercool the engine, and having a 12" fan going all the time will probably only satisfy some of the cooling requirements (over or under).
You need to know:
1. Clutch on/off engine temp.
2. CFM of current fan.
3. HP draw of current fan.
4. Amp requirement of 12" fan.
5. Alternator available amps.
6. How much higher HP draw alternator would be with 12" electic fan, provided there is capacity.
7. Top Tank temp limits.
Just to name a few.
So, without a tonne of instrumentation and info from Nissan, I would say no.
t