hi tec 7955 max voltage

[Bray D]

Originally Posted by corkysk8

I have a Spektrum SR 3100. It list the voltage input range as 3.5v - 9.6v. In the specs for the receiver it does not mention a regulator or anything like it.

I'm not sure what receivers do or don't regulate output voltage. I was talking to the guy that runs my LHS, and he said the receivers on a couple of his Associated trucks were like that. He said guys were coming in complaining of the slow servo speed, so he would plug the battery into the open 3rd or 4th channel that it had. Said that would apply the "unregulated" voltage to the servo.

I'm not positive though. It'd be easy to check if your receiver was regulating the output to your servo, just hook up the multimeter and look. I guess I've never done it since I've got a BEC.

[AlmstEvil665]

Corky I'm sorry I used the wrong word I meant the ESC has an internal BEC my bad. If you are running and external BEC then it will trump the internal BEC. Sorry for the confusion.

Zimm I'm thinking you are getting away with it due to the fact that they are in an airplane. Your not binding up the servo or working it as hard as you would in a crawler.

When called Hitec CS the first thing he asked me was if I was running the servo in a crawler. We put a lot more stress on our steering servo's than the typical airplace or nitro racer. More stress equals more heat which leads to the magical smoke being released. He recommended a servo prgrammer to set the fail safe. Everything has been good for me since but I did go back to 6v.

If you want a faster stronger servo get a 7950. If not Hitec will send you new smoke when your 7955 lets go of the ghost. Make sure you ask for the purple smoke though because they will try and send you the gray stuff that came out the first time lmao.

[corkysk8]

I put it back to 6v after reading all of this. I agree that you don't really notice a big difference between 6v & 7v. Thanks for the help and answers.

On a side note. I moved the drag link to the upper hole on the servo arm and noticed an increase in steering strength.

[Bray D]

Absolutely. You'll lose turn radius though.

edit: it will increase your turn radius, I knew what I meant haha

[ubbb69]

Originally Posted by SACCO

I've got a dead 7955 that was run at 6.5 volts. If you want one too, turn up that bec

Bahh i ran mine for over a year at 6.5 It is still ticking. I think the continous fully submerged water runs did yours in.

[SACCO]

Originally Posted by ubbb69

Bahh i ran mine for over a year at 6.5 It is still ticking. I think the continous fully submerged water runs did yours in.

Why did you switch to a 7950? Oh yeah, you're 7955 wasn't cuttin the mustard anymore.

[corkysk8]

Originally Posted by Bray D

Absolutely. You'll lose turn radius though.

edit: it will increase your turn radius, I knew what I meant haha

No loss of steering throw or increase in turning radius.

Small steering mod.

[Calicrawler23]

Interesting, lots of the racing guys run 7955's on unregulated 2s lipo. They are actually capable of handling the powers says Hitec Reps. It must be the BEC frying the servo.

[SACCO]

Originally Posted by Calicrawler23

Interesting, lots of the racing guys run 7955's on unregulated 2s lipo. They are actually capable of handling the powers says Hitec Reps. It must be the BEC frying the servo.

I don't think my bec can hit the amps a 2s pack can?

[Calicrawler23]

Originally Posted by SACCO

I don't think my bec can hit the amps a 2s pack can?

I'm not sure. Maybe the fact that the lipo is going through the receiver then to the servo is what's making the difference. Also mentioned earlier is that crawlers put more strain on a servo. A nitro buggy or truggy won't nearly stress the servo as hard as a crawler in a bind.

[Bray D]

Originally Posted by corkysk8

No loss of steering throw or increase in turning radius.

Small steering mod.

Not saying that your steering isn't still awesome, but assuming there's no other limiting factors (tires hitting links, knuckle bind, etc), moving the drag link closer to the servo gear WILL give you a shorter throw (and more power). Simple geometry.

[toy4crawlin]

Originally Posted by Bray D

holy cow. That's pretty serious. I may bump it up just to see what the performance is, but I doubt I leave it there. I've already seen a decrease in run time by adding the bec and running it at 6v.

if you feel your steering is slow see if it is binding at all. It should almost want to continue moving if you move a tire by hand.

over 6 you will eventually burn it up
Just leave it at 6v

[Bart bender]

The most important issue is EPA. MAke damn sure they are set right. A 7955 will handle higher voltage as long as you watch temps. Rock bashers usually don't watch temps.