I am looking for a new servo and ESC for my touring car, what would most of you recommend? I am currently running a Z590M from JR and it has been flawless. The specs for it are as follows Torq. 85oz/in @ 6V, Speed .15sec/60degrees @ 6V, 1.6oz weight, motor is a 3 pole ferrite, with metal gears.
Not knowing very much about what to look for is this considered a decent servo? Of the above listed specs which are the ones I should be most paying attention to whilst searching for a new one.
A similar question is for the ESC, I am currently runnning a Novak GT7 and it has also been flawless, it has the external capacitor and schiotky diode, with one button set up. Is this considered a descent ESC? What are points one should look at when purchasing a new ESC? Are there any ESC tht stand out as either really good or really bad???
Any and all input would be great.
RY"Newbie needs help"Y
I dont know a whole lot, but: Lower on resistance is better (in ohms). High operating frequency is better 1, 2 Khz +?
The GT7 ESC you have is a great ESC - there is no real reason to replace it esp for a touring car. I have the GTX which replaced the GT7 which I would highly recomend. The Quantum 2 is another very popular ESC. Like I said earlier its unlikely changing your GT7 will make any difference in performance....
As for servos the bottom line is to get as fast a servo as you can afford. Airtronics is the king - although I've been using the top of the line HiTec servo (yes I hear a lot of cringing...) that has served me well and has almost the same specs as the fastest Airtronics servo at about 50% less than the Airtronics...
Oh BTW the specs for the "good ones" are:
specs at 4.8V/6.0V..
Airtronics 94758Z 92 / 115oz 0.07 / 0.06 speed digital/coreless
Hitec HS-5925MG DIGITAL HIGH SPEED 103oz/128oz .10/.08 SEC METAL GEAR DUAL BB 1.6"x0.8"x1.5" 1.97
JRPSZ8800S
Type: High-Speed Digital Servo
Torque: 105 oz/in @ 6V
Speed: .08 sec/60 deg @ 6V
Dimensions: .75" x 1.54" x 1.36"
Weight: 2.08 oz
Bearing: Dual output
Motor Type: Coreless
this is the servo i use in my elec touring car and 1/8th scale buggy.
as for seed control
i use the ko propo vsf 1 competition
i also use this servo
JRPSZ9000S
Type: Ultra High Speed
Torque: 128 oz/in @ 6V
Speed: .06/60 degrees @ 6V
Dimensions: 0.83x1.59x1.50 in
Weight: 2.2 oz
Gears: Metal Gears
Quote from: "gearhead"I dont know a whole lot, but: Lower on resistance is better (in ohms). High operating frequency is better 1, 2 Khz +?
Actually, this isn't necessarialy the case. A higher switching frequency (what you referred to as operating frequency) translates to decreased efficiency, where more of the power in the battery goes to heating up the speed controller than in lower frequency models. This is doubly bad, since the "on" resistance will increase as the temperature increases.
So, don't just look for the highest switching frequency and think that this means it's the best speed controller out there. As a general rule, 1/12 scale cars will work fine at any frequency, but something like a modified touring car (the other extreme) may get fairly warm at higher drive frequencies. Several models have selectable drive frequencies.
Another thing to look for is to see if the speed controller is designed to work with a 4-cell battery. Some electronics (especially recievers intended for nitro cars it seems) don't work reliably with only a 4-cell battery pack.
When compairing servos, the two most significant numbers for performance reasons are the transit time and the torque. The torque rating isn't very significant for 1/12 scale, since the cars are so lightweight and small. The speed however is. Make sure when you compair the transit times that you take into account the angle they measure, as well as the operating voltage. Given the full specs for any servo (operating voltage, angle, transit time) you can normalize the results, since the transit time is proportional to both the operating voltage and the angle.
As a final note on speed controllers, even though it is true that the most important spec. on a speed controller is the "on" resistance, 1/12 scale stock cars are the least demanding kind of car on speed controllers, so any speed controller that can handle running with 4-cells will work perfectly fine. Touring cars require better speed controllers than 1/12 scale cars.
You can never get a speed controller that is too good, but if all you're going to run it in is a 1/12 scale car, consider the size of the speed controller as well, since the "on" resistance is much less significant in an 8-minute race.
Hmmm. Maybe I should have paid attention to which topic this was in; I was assuming the questions were being asked in the context of 1/12 scale cars, when it's more likely being asked in the context of 1/10 scale touring cars.
Everything I said still applies, but obvioulsy the conclusions would be a bit different.
As far as particular models are concerned, there's such a vast selection nowadays that changes so frequently, I don't keep up on it any more, so I can't give any specific reccomendations.
In my opinion use whatever you can afford and that you feel comfortable with as long as it can handle the job. FYI I am using an older speed control in my touring car(Tekin G10) and it seems to work fine for stock. I also use on occasion a Novak Cyclone - the original one. Again it works just fine.
I find people worry about getting the latest and greatest electronics a bit too much. On your list the only thing I would replace, or think of replacing is the servo. Personally I like my servos to have a transit speed of .10 or less. As you have probably heard from someone in the past, you won't gain much speed because of your electronics. Driving is where its at !!! Practice your face off. (when you can)
Jim is right on the money with this one.
Your servo will make a much bigger difference than any speed controller choice.
in my 12 th scale im using a novak atom speed controll and a full size touring car servo. its not even a fast one at that
yo ryy
check this out might be a cheaper option for ugrading your TC4 to FT spec
http://www.bmiracing.com/products_ae.htm
BMI product are top notch stuff. they use the best stuff avail. I also believe that the BMI product is way better than the conversion from AE.
Thanks guys for your thoughts and opinions. As far as upgrading, my R/Cing existance is in limbo right now and only time will tell what, where and when (scale or day of the week) I am able to race.
RYY
An overclocked GT7 will beat any new ESC including the GTX, LRP Pro3 or GM.
However extra cooling (a fan) is recommended when overclocking ESCs.
An overlocked standard servo 94102 will also give you the speed you need but doesnt add any torque.
peace
Quote from: "haddow"An overclocked GT7 will beat any new ESC including the GTX, LRP Pro3 or GM.
However extra cooling (a fan) is recommended when overclocking ESCs.
An overlocked standard servo 94102 will also give you the speed you need but doesnt add any torque.
peace
What a bunch of garbage - everyone know the clock multiplier on the 94102 is locked out....
But seriously folks.... best bang for the buck ESC is probably the new Novak GTS esp for touring car....