That won't work. Right behind the caseing are the winding's, so actually drilling in the case is not a really smart idea to do cause you will damage the winding's, and it won't help a bit.

Just get a rcm heatsink and a small fan on top and you'll be fine.

Just keep in within 40,000 rpms... It will run cooler, last longer, be more efficient, and powerful with the proper gearing. Also, The IB4200's are really good cells. I run them on my brushless E-Revo and they are great.

So a 6 turn is probably to high of rpms, what about a 7 turn?

I would go for a 7 or an 8.

The 8 turn works very well on 20 cells. I don't think you will have enough batteries to push the wattage for the car to run like it is supposed to. The 7 turn should push you to a good speed on 20 cells to.

Could I gear for a higher top speed in miles per hour on a 7 turn than a 6 turn 1950 on 20 cells?

Like already stated, a 6 would be to hot...A 7 or 8 would be the shizzle and yes, you can gear higher to compensate for the lower kv.

So as far as miles per hour top speed is concerned, the lower rpm motor is truely the faster one? Here is an article about my car with some good pictures. Can you guys comment on how stong you think the driveline is based on the pics, especially the center driveshaft and the differentialls? Look at them and tell me how much power you think they could take without breaking, they look strong to me but I have nothing else to compare to.
http://www.rcuniverse.com/magazine/a...article_id=604

i'm running a 1950/8 non high with 6s lipo (22.2v). i'm very pleased. it averages 90 degrees in tally,fl and at about 15-20 minutes my motor and esc (12020) are at about 150 degrees with 15t mod 1 pinion. tons of torque and speed. i will probably dream about driving my g2r tonight. awesome motor!

No, the lower the turn's the faster the motor goes. Only like Squee explained, with a 5 or 6 turn motor on 20 cell's the rpm will be way to high to gear it down and not blow a motor or controller. So the solution is to find a higher wind motor which has no problem to gear it for speed. You use the motor's torque to do that, not the rpm.

Onto the car, that center shaft will go. It's alum, it won't last long with the weight of 20 cell's. But how on earth can we judge the strength of this car by looking at some picture's?

If I get a new car, which one would have a stronger shaft to handdle the weight of 20 cells and still be a low pan chassis? How strong is a belt drive setup?