CC Blower....Blows

[Shonen]

Originally Posted by georgec

What????...How can there even be "HIGH AIR FLOW" when it's being packed up in a box and forced back through the top of the fan? With over whelming back pressure there is no air flow and therefore no heat exchange!

by cutting up the shroud you decrease backpressure and thus increase CFM, but because the shroud isn't directing the air around the motor, you can't cool the motor as effectively. the air is supposed to flow around the motor, between the shroud and the motor fins. If you wanted maximum airflow, you would just ziptie the fan to the top of the motor without a shroud.

What you're effectively saying in PC terms is that instead of having system/cpu fans inside the case, it's much better to take out the fans and instead put the entire case in front of a fan moving huge amounts of air. Sure, backpressure will drop CFM's but what's the point if what CFM's you have are not being used effectively?

[georgec]

Originally Posted by Shonen

by cutting up the shroud you decrease backpressure and thus increase CFM, but because the shroud isn't directing the air around the motor, you can't cool the motor as effectively. the air is supposed to flow around the motor, between the shroud and the motor fins. If you wanted maximum airflow, you would just ziptie the fan to the top of the motor without a shroud.

What you're effectively saying in PC terms is that instead of having system/cpu fans inside the case, it's much better to take out the fans and instead put the entire case in front of a fan moving huge amounts of air. Sure, backpressure will drop CFM's but what's the point if what CFM's you have are not being used effectively?

By opening the bottom of the shroud the air flow is allowed to move across a larger portion of the motor with greater cfm therefore taking more heat with it!

[georgec]

If you want to relate this to a cpu, you can have as many fans inside the box as you want but if you don't have fans removing the air from the box you are doing nothing but circulating hot air in the box!

[Shonen]

Originally Posted by georgec

By opening the bottom of the shroud the air flow is allowed to move across a larger portion of the motor with greater cfm therefore taking more heat with it!

If you want to relate this to a cpu, you can have as many fans inside the box as you want but if you don't have fans removing the air from the box you are doing nothing but circulating hot air in the box!

The shroud is there for a reason. Like I said earlier, if you wanted maximum airflow you wouldn't use the shroud at all, just ziptie a fan (probably a larger one) on the top of the motor.

Also, what you said about the pc (not cpu) is entirely correct, it's not the best analogy but that's what I've been trying to tell you. The shrouding ducts the fan so it will push air across the maximum amount of motor surface area while keeping a decent amount of airflow. Pull air through the case (ie. what has to be cooled) even though there's vents, cabling, etc. in the way rather than blast only one part of it with high speed air.

[georgec]

Well the bottom line is I'm not cooling a "PC" I'm cooling a 1/8th E buggy motor under race conditions. Before the mod to the shroud my motor temps after a 15min main ran between 170/180f after 160/170f but I believe I can do better than that by taking one of these and removing the nose piece and splitting the rest in half. With this fan bracket I can mount a 40x10mm fan instead of the 30x7mm. The reason I know this will work better is I already have this setup on a Tekno 2200kv motor and it temps at 150/160f after a 15min main.
Here is the Tekno setup on my O'Donnell Z01-Be

[Shonen]

Originally Posted by georgec

Well the bottom line is I'm not cooling a "PC" I'm cooling a 1/8th E buggy motor under race conditions. Before the mod to the shroud my motor temps after a 15min main ran between 170/180f after 160/170f but I believe I can do better than that by taking one of these and removing the nose piece and splitting the rest in half. With this fan bracket I can mount a 40x10mm fan instead of the 30x7mm. The reason I know this will work better is I already have this setup on a Tekno 2200kv motor and it temps at 150/160f after a 15min main.

well the pc was an analogy. either way, a larger fan will do a better job of cooling...are the Monster and Blower fans the same?

[georgec]

Originally Posted by Shonen

well the pc was an analogy. either way, a larger fan will do a better job of cooling...are the Monster and Blower fans the same?

Yes 30x30x7 5VDC