XRAY - Model racing cars

i'm using thespectrum Z270 servo on my throttle, brake would it be too weak to operate the brakes?

In my opinion it is too weak and slow for both the throttle/brake and/or steering. My buddy uses the z590 for throttle and seems to work okay. I am just picky i guess for my throttle i want the fastest thing i can get while still being strong.

Yeah I am sure it was, sometimes they are hard enough to drive even with brakes

what would be a real high quality servo to use for my throttle and brake?

It depends on how much of your wallet you want to empty I uused to run a hitec 5625 and it did me well. I currently run a JR 9000s and I know of a lot of people that run the airtronics servos as well. As you can see you can range from about $40 to $120. I would say try and find something that has more than 100oz of torque and less than a .15sec travel time. Hope this helps.

I would have to say that the servo you chose should do you just fine. if you have the helios radio and pc interface you could also take advantage of even more features!

The radio i'm running is the spektrum DX3. right now i'm running a 1400 mah battery pack in my buggy will that be enough battery to run 2 digital servos for 35 minutes?

I ran a 1400mah pack for awhile and never had any problems with it. It should be okay just make sure you have a full charge before you start. Maybe pick up an extra one for the qualifiers and then have one for the main as well. Or you can do what a lot of guys on here do and go for the team helotes 2600mah pack.

All I run is the Xray 2/3A 1200mAh pack and have never had a problem with run time with two Futaba 9351 servos. In my honest opinion, you don't need anything more than 1400mAh unless youre doing a several hour endurace race, haha!

1200mAh 6V with 9451s, lasts for hours.