Is an ESC fan needed for 17.5 brushless?

[aconsola]

Is an ESC fan needed for a GTB running in a 2wd buggy with a 17.5 motor?
It makes it tough to fit this into the already cramped JRX-2 chassis.

[gregm]

You should be fine without the fan. I never ran one in my B4 with a 13.5 on the hottest days of the summer. Just to be safe, check the temps @ 2 minutes and 5 minutes during practice.

[Charlie don't surf]

Watch the GTB's, they run hotter than most--Charlie from Novak let me borrow one during the
2008 USOW as we were having problems with a prototype motor & thought it might be esc related, anyway the clear fan that comes factory with them is junk--, if you can get the smaller
but faster black novak fan remove the clear one and junk it, replace with the optional. Even with the 17.5 and up to 5000/37c batteries you can still do some damage on hot days depending on your rollout

[tecnica2001]

I've been running my GTB with a 5.5 in my T4 for almost a year without a fan, and haven't had a problem so far.

Oh, and I'm running a 35C lipo through it too....

[bscotti]

I didn't have any probs last year, sans fan.

[aconsola]

sounds good, thanks guys.

[gregm]

Just keep an eye on the temps for the first couple runs. Also, if conditions change from moderately dry to really wet your system will be working much harder.

[badhoopty]

i ran all last year at the vintage nats with no fan.

BUT i spent half the time upside down waiting to get marshalled...