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Old 09-13-2007, 08:22 AM   #1
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Default XBR and GTB: What are the differences?

I want to upgrade the ESC in my 05R. I know that sometime in the near future I will probably be racing with brushless motors and Lipo batteries, so I need a speed control that will handle them. I like to stick with Novak because i have had good experiences with them in the past, so that's why I'm looking into the XBR and GTB. I know they are about $50 apart in price, but what are the things that set them apart that an club racer would notice? I know the GTB has lower on resistance and a cooling fan already installed, but what are the real differences that affect performance? thanks for your input
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Old 09-13-2007, 09:01 AM   #2
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The GTB handles the hotter motors (3.5 woo hoo) where the XBR goes to 8.5. The XBR handles 7 cells where the GTB only does 6. GTB for racers, the best choice IMO. The punch and efficiency coupled with the ability to handle the hotter motors gives it the edge. Now, if you want to bash, the 7 cell XBR is good enough.
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Old 09-13-2007, 04:18 PM   #3
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thanks for the input. i dont see myself using 7 cell, or anything much below the 13.5.
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Old 09-13-2007, 04:52 PM   #4
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u might want to think about resale value too, should u decide to sell it in the future.

I reckon it will be much easier to sell the GTB simply bcos it can cater to all racing classes (mod->stock) while the XBR canít.
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Old 09-13-2007, 05:44 PM   #5
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One pretty handy deal about the XBR is that it fits into a few cars easier than the GTB. The GTB is a more race-oriented part, but the XBR is pretty decent...especially if you can find one cheap. It does pretty much everything the GTB does, aside from the lower-wind motors...even lipo cut-off.

BTW -- I have two GTBs and one XBR.
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Old 09-13-2007, 06:35 PM   #6
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i think i can get one from tower for $25 new by using a promotional discount. that would make it about $155 or so i believe. sounds like a deal to me..
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Old 09-13-2007, 08:04 PM   #7
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if you are not yet running brushless, I believe the XBR is easier to use w/ Brushed motors also...(easier setup)
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Old 09-13-2007, 08:23 PM   #8
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Quote:
if you are not yet running brushless, I believe the XBR is easier to use w/ Brushed motors also...(easier setup)
i thought that they both have the same profiles you can select from? also, i have pretty limited space in my 05R for a speed control. not saying i couldn't move the receiver around, but the smaller one would definately be a plus. also, does the cooling fan make a difference if i would be primarily running brushed motors? i figure that a 19 turn brushed motor would not stress the ESC that much, so there is no need for a fan until i go to a lower wind brushed or brushless motor...is this assumption correct?
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Old 09-13-2007, 11:51 PM   #9
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Quote:
Originally Posted by macnkitty2002 View Post
i thought that they both have the same profiles you can select from? also, i have pretty limited space in my 05R for a speed control. not saying i couldn't move the receiver around, but the smaller one would definately be a plus. also, does the cooling fan make a difference if i would be primarily running brushed motors? i figure that a 19 turn brushed motor would not stress the ESC that much, so there is no need for a fan until i go to a lower wind brushed or brushless motor...is this assumption correct?
I'd say that's right, & as an added bonus to the XBR, it can auto-detect brushed or brushless motors, & configure itself to run either(with the GTB you have to go through a slightly annoying procedure to switch between brushed & brushless mode). I know what you mean about space on your '05R, as I have a hopped-up '05, & while I don't know for sure about the XBR, I do know the GTB fits on it just fine(a bit tight, but not hard to fit in there). Honestly, if money is tight for you then I'd DEFINITELY go with the XBR, its price is just too good to turn down, & I doubt you'll really have to worry much about any lack of performance(not to mention its user-friendliness)....
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Old 09-14-2007, 03:47 AM   #10
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I had to raise the XBR about 1/4" with a little block so that it would fit in my 05R.
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Old 09-14-2007, 06:17 AM   #11
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What about the FAN thing guys ?, do the FAN make a lot of difference ?, im about to start racing electrics after years of nitro sedan and nitro 1/8 offroad racing and im a little tight on budget, this will be raced on 19T class, non-lipo batts and maybe brushless 10.5 motor.

thanks,
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Old 09-14-2007, 06:35 AM   #12
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i can afford the GTB, but i could also use the savings for a power supply (which i really need).
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Old 09-14-2007, 07:16 AM   #13
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Quote:
Originally Posted by Tabushi View Post
What about the FAN thing guys ?, do the FAN make a lot of difference ?, im about to start racing electrics after years of nitro sedan and nitro 1/8 offroad racing and im a little tight on budget, this will be raced on 19T class, non-lipo batts and maybe brushless 10.5 motor.

thanks,
You don't need a fan at all.
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Old 09-14-2007, 07:32 AM   #14
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Quote:
Originally Posted by Tabushi View Post
What about the FAN thing guys ?, do the FAN make a lot of difference ?, im about to start racing electrics after years of nitro sedan and nitro 1/8 offroad racing and im a little tight on budget, this will be raced on 19T class, non-lipo batts and maybe brushless 10.5 motor.

thanks,
A fan on the XBR or the GTB for the milder motors isnt necessary. To my understanding, they (BL motors) perform better than their brushed "equivalents", so geared right, you get the speed, performance and run time without the heat. Balls to the wall, better safe than sorry though
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Old 09-14-2007, 09:59 AM   #15
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thanks, i think i'll go with the XBR.
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