I dont think we can say the construction is the same, Ive killed 2 different feigaos, despite pushing my mamba motors much harder. The mamba cans never fall apart, and the rotors stay on the shafts.

how well do you guys think a Fiegao L motor would do in a SB V2 Pro? I like the looks of the S motors but they don't have much in the way of lower KV's you can get in the L size cans. The L can is a standard 540 size right?

Personally, I think that an "L" sized motor is way way too big for a SB V2 Pro. A 10L pushed my crt.5ext to 41mph on 4s. Mind you that my crt.5ext is 5-5.5lbs. I think a neu 1506 is perfect or a smaller mega motor.

Something like THIS on 2s would be perfect for racing IMO; you really do not need anymore.....

A mamba 5700 on 2s is perfect in the Academy. I know this because I got beat by one at our roar regional electric race while I was running a crt.5ext. Not sure what his gearing was but I think it was 15 or 16 pinion and stock spur.

fyi. i sold my sb v2 SPORT two three days fater my first run of my buggy. 540c 9l and 8 (old 2400 nicd uncycled) cells absolutely obliterated the diffs. i'm not sure what drivetrain upgrades are on the pro, but thought i'd throw that out there..

They have steel outdrives and you can use better 3/32" diff balls and losi spring. The slipper adjustment is critical to keep from smoking diffs. I don't really see how the diffs in the SB V2 are that much different from the common ball diffs, with the exception of smaller balls. I'm thinink that there may be a potential to machine back the ring lands on the steel outdrives to allow the use of 1/8" balls if I find I just can't keep the diffs togeather. That and breaking in the diffs gently.

Diffs
 

Diffs are the reason you need to start with an all steel drivetrain. I finally stopped trying to make 1/10 buggies go really fast because the smell of melting plastic sucks! If it was originally designed for nitro it probably has a chance of surviving the BL experience. The CRT.5 is a great conversion, built like a small tank.

The SB V2 is a racing buggy. It's light and agile and can offer alot, for something that weighs less than a nitro conversion. Steel spider gear diffs are great for lasting through tons of abuse, but does anyone make one small enough to weigh what a ball diff weighs? The whole point of this buggy is it's ability to turn fast, on a dime. Tight tracks like the ones available to me don't work for 1/8th buggies and I havn't found a 1/10 4wd nitro buggy that could be converted to compete with the buggies in this class, on this track.

There IS a need for strong ball diffs, but it's not impossible to get one to last in a high torque, high speed 1/10 4wd buggy.

Not to be too defensive... suppose it's too late for that :)

Race buggies
 

I completely agree with the handling issue. I run a xx-4 on a tight track and the handling and light weight are great. After melting a bunch of parts with BL I went back to a brushed motor on lipo, good combination for long running and useable power. Its fast and fun to drive. My CRT.5 is quite a bit heavier and does not turn as well at speed but in terms of raw power and speed it is way beyond what a 1/10 can handle.

BTW, when I find a 1/10 4wd buggy with real diffs and race handling you can bet I'll get my wallet out!!