well I just ordered one of these....and i will let you all know how testing goes
http://www.dimensionengineering.com/SportBEC.htm

Based on the test results of its little brother, I think you will be very happy with it. Even the little one is quite efficient, small, and maintains a steady 6v with varying loads.

that is good to hear....i should get it in a few days

one question about this....No ESC throttle cable modifications are necessary (cutting/removing the red wire). You plug the ESC into the BEC, and then plug the BEC plug into the throttle channel on your receiver. This allows you to keep the battery and AUX channel slots free. However, if you don't want to insert this device in line with the throttle cable, it can also function perfectly fine when hooked up isolated like any other BEC.....I have read it on here and on there site.....so when using the quark i should be fine......with plugging it inline

Yup. I just mentioned that point because some people may want to hook it up like a conventional UBEC. Either way works fine.

ok thanks

that helps me out alot.....can you post pics of the back side of it, along with a side view of the one you have please

There's not really much to see. There is a metal heatspreader that wraps across the bottom and up the sides so anything under there is covered. Since this is a test unit, I didn't want to cut off the heatshrink to explore further.

In my initial post, there is a link to some pictures directly from the Dimension Engineering website which has some pretty clean pics.

thank you...i'll look into those

Well I got my Sport Park bec in the mail the other day and got it all hooked up...and took it out for a test run last night...and it works very smooth and flawless as well, however..I didn't get to test the batts on it till they dumped, because I was running it in a wide open parking lot..and was doing adj. on radio ( and did a Nooby mistake) and accidently switched throttle from norm to reverse..and car shot away from me like a bat out of H#ll...and by the time I could realize to hit the brake it was accross that parking lot, the street and into the next one....luckly no damage due to i didn't hit anything....so after this I packed it up and headed back home.....partially to swallow my heart back down and to change the ol' drawers to..cause ...well we all know what can happen......scared the Cr@p outta me....so when i get them to dump i'll post it here.... but aside from my short story ...it was $$ well spent

So, I take it you didn't do any kind of load testing on it to see how it hold up voltage-wise and temperature-wise?

No not really...I just put in my truck and went.....why? and how would i go about doing this anyways

That's all right, I was just wondering how the numbers compared to the ones from the ParkBEC. I just use various power resistors I have laying around to create different loads. However, I just built an active loading circuit using transistors that lets me dial in any amount of current I want. Once I get it in a project box and make it all "pretty" I'll retest the ParkBEC and all the different BECs I have to get more samples.

I jot down all the measured values and then put them in a spreadsheet that calculates some of the other things, and plan to add graphs.

Well, about all I have to offer is that the throttle passthru feature is real nice and it along with the quark run ever so smoothly.......and the range is great as well

As long as it works well, that's all that counts, right? :)

I just do the whole load test thing for my own curiosity and to inform others as well.