1.1 Pump (am-3227) Really an improvement?

[cbale2000]

Originally Posted by JPBlacksmiths

How did you attach this fan being that the compressor doesn't have mounting holes for a fan? (Or at least i'm pretty sure it doesn't)

There's actually pictures of it here on CD I think if you browse the photos section a while. We did something similar to this on our 2011 bot, but we just mounted one of the 120mm fans next to the compressor so that air blew across it. The improvement in heat dissipation was actually pretty drastic: Test Results

That said, even if an external fan can help keep a compressor tolerably cool, if you're running a low duty cycle compressor almost constantly throughout a match, you're still using it beyond it's designed limits. I would also suspect that you will still loose efficiency over prolonged use this way due to internal heating that isn't adequately dissipated by external fans.

You can actually think about it a bit like how we think of motors. The 775pro motor is a great, strong little motor, but too much heat (generally generated from stalling the motor or extended use) will cause it too loose efficiency and burn out, and while blowing a fan across it might help, it won't stop the problem. Alternatively, a CIM motor can run continuously even after substantial heat build-up (even in stall condition) without a fan with little to no damage due to its increased thermal mass.
Essentially <15% duty cycle compressors are 775pros and ~100% duty cycle compressors are CIMs.