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Old 11-29-2009, 10:04 PM   #1786
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Originally Posted by Novarossi View Post
Brian,

I got a direct email from KO Propo USA that the 2413 was NOT suited for nitro use, and would not be covered by warranty (after blowing one on my throttle).

They suggest that this is only an electric car servo (no heatsink, low torque, etc).
Weird, I have used them for literally years and Robert/KO recommended their use in a round about way because I should run a regulator with 2413's and that I would not have to if I ran 2367's or 2368's so he obviously knew it was for nitro because we were talking about lipo directly to the receiver but he probably gets a lot of calls. I think the ICS technology allows them to last because they don't take impacts under stress. Sedan only obviously.

Other news on those Orions, apparently they have a futaba spline but they are not and said to be Taiwanese. I felt some of the blue ones today, they're pretty nice.
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Old 11-29-2009, 10:37 PM   #1787
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Quote:
Originally Posted by Brian Bosley View Post
Weird, I have used them for literally years and Robert/KO recommended their use in a round about way because I should run a regulator with 2413's and that I would not have to if I ran 2367's or 2368's so he obviously knew it was for nitro because we were talking about lipo directly to the receiver but he probably gets a lot of calls. I think the ICS technology allows them to last because they don't take impacts under stress. Sedan only obviously.

Other news on those Orions, apparently they have a futaba spline but they are not and said to be Taiwanese. I felt some of the blue ones today, they're pretty nice.
Yep, Robert was kind enough to replace it this time only, but suggested not using it for nitro - I still have a copy of the email.

Quote:
We only recommend using servos with a heat sink for nitro due to the excessive heat build up
The throttle servo completed seized, only about 3 heats old - It was an electronic fault
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Old 12-07-2009, 06:55 AM   #1788
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Hi, just wondering if anyone is using Futaba 2.4gHz receiver with High Voltage servos and a lipo RX pack without a regulator?

So, in other words - Can the Futaba RX handle 7.4 volts for a prolonged time ? I've been table testing and it all looks good, but what about in real driving conditions?

Any experiences there? Appreciated, thanks.
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Old 12-07-2009, 07:17 AM   #1789
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Hi!

I think it is not a good idea ...
I have problem with bec system in futaba RX (fired up), chassis was
RRR with asso xp 1015 for steering (14kg/0.10sec/6V) and low profile
kopropo for gas/break. 7.4V is under load but fresh charged lipo has a little over 8V!

My spektrum pro 3001 handle this setup without problems, a little
warm from RX.

IMHO better is use voltage regulator ...

I think better solution is use LIFE 6.6V RX pack, they are available for
GP's and should fit to RRR without problems.

Regards!
m.
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Old 12-07-2009, 08:37 AM   #1790
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Quote:
Originally Posted by MikaR View Post
Hi, just wondering if anyone is using Futaba 2.4gHz receiver with High Voltage servos and a lipo RX pack without a regulator?

So, in other words - Can the Futaba RX handle 7.4 volts for a prolonged time ? I've been table testing and it all looks good, but what about in real driving conditions?

Any experiences there? Appreciated, thanks.
None of the manufacturers "recommend" 7.4v to the receiver and servos. Some will support it, and the warranty period is so short that they don't really have to worry about it. but it does cause your servos to fail earlier supposedly.
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Old 12-07-2009, 11:13 AM   #1791
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Thanks for your responses -

servos are lipo ready high voltage Hi-Tec servos, I'm really only concerned of the RX. May need to change to Spectrum which can handle 9,6 volts.

Servos http://www.hitecrcd.com/servos/show?name=HS-7940TH
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Old 12-07-2009, 03:49 PM   #1792
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JR also makes a few servos that are lipo ready.

9100HV servos. I think there are two servos in the HV line. Torque and Speek
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Old 12-07-2009, 05:41 PM   #1793
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I match 2/3a (receiver cells) for 1/18th micro cars, the cells that don't make the cut for racing I use for nitro receiver packs. I also have done quite a bit of work with lipos for micro racing (same size and voltages as receiver packs) along with LiFe packs and I've found that no matter what the manufactures say about their gear current generation electronics do NOT like 7.4 volts. It creates quite a bit of heat and especially w/ the standard brushed motored servos; it kills them quickly, it also puts allot of strain on the gears in the servos and the receiver electronics as well if you try to run it w/o a regulator.

Regulators work, but they are not all created equal. Xceed's regulator I've found to be more consistent and more reliable than most of the others on the market. The issue is when the regulators go, they take your servos with them and personally, I don't think it's worth the risk of blowing 2 100$+ servos. I've seen a guy blow two JR 9000's in the same day behind a crappy regulator.

LiFe and good, graded, matched NiMH packs are your best bet for today's electronics. Life have 6.6 volts so you don't need anything special to run them. Only down side is you have to have a charger capable of charging Life packs. My favorite for gas racers are Hyperion 606I ac/dc http://www.skyrocketbatteries.com/pr...products_id=99I plan to carry Turnigy (a cheaper Chinese alternative) in the future but the old adage applies ... you get what you pay for. There are some others that do a good job but I've found the Hyperion chargers to be very reliable for a reasonable price.

Nimh are still a viable alternative and to prove a point when I race my gas car I only charge my packs once (twice if i bump up). I ran the whole day Sunday through practice, quals and 1 30 minute main on one charge and still had plenty of juice left in the pack.

My graded matched assembled 5 cell receiver packs are 20$. Being an electric guy I cringe when I see people risk a 500+ kit, 400+ motor, and 300+ in misc stuff to a 15$ bargain bin receiver pack that hasn't been through any sort of process to weed out bad cells or gauge their run time. My biggest competitor, Team Scream, also has great receiver packs and puts his cells through a similar rigorous grading and matching process. Leave non-matched packs for the bashers even if you don't get them from me .

Anyway this is turning into a book and I think I promised once in the past not to do it again . I am always glad to help, and you should be seeing Skyrocket at more nitro events like the US Open Fuel Champs, and the Winter Nats, so please stop and ask when you see someone with our shirt on.



Quote:
Originally Posted by MikaR View Post
Hi, just wondering if anyone is using Futaba 2.4gHz receiver with High Voltage servos and a lipo RX pack without a regulator?

So, in other words - Can the Futaba RX handle 7.4 volts for a prolonged time ? I've been table testing and it all looks good, but what about in real driving conditions?

Any experiences there? Appreciated, thanks.
Quote:
Originally Posted by M.Abramowicz View Post
Hi!

I think it is not a good idea ...
I have problem with bec system in futaba RX (fired up), chassis was
RRR with asso xp 1015 for steering (14kg/0.10sec/6V) and low profile
kopropo for gas/break. 7.4V is under load but fresh charged lipo has a little over 8V!

My spektrum pro 3001 handle this setup without problems, a little
warm from RX.

IMHO better is use voltage regulator ...

I think better solution is use LIFE 6.6V RX pack, they are available for
GP's and should fit to RRR without problems.

Regards!
m.
Quote:
Originally Posted by MikaR View Post
Thanks for your responses -

servos are lipo ready high voltage Hi-Tec servos, I'm really only concerned of the RX. May need to change to Spectrum which can handle 9,6 volts.

Servos http://www.hitecrcd.com/servos/show?name=HS-7940TH
Quote:
Originally Posted by Brian Bosley View Post
None of the manufacturers "recommend" 7.4v to the receiver and servos. Some will support it, and the warranty period is so short that they don't really have to worry about it. but it does cause your servos to fail earlier supposedly.
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Old 12-08-2009, 02:26 PM   #1794
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yes, get the LiFe battery:

http://www.rc-toro.com/product_info....oducts_id/1666

If a charge can charge Lipo, you can use it to charge LiFe
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Old 12-08-2009, 02:43 PM   #1795
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Quote:
Originally Posted by silverM3 View Post
yes, get the LiFe battery:

http://www.rc-toro.com/product_info....oducts_id/1666

If a charge can charge Lipo, you can use it to charge LiFe

Wrong!
http://www.rctech.net/forum/nitro-ro...-new-post.html

LIPO 1 cell is max to 4.2V and LiFe 1 cell is max to 3.6V.
So 2 cell LIPO is max charged to 8.4V and LiFe 7.2V by CC/CV method (constant voltage
or something constant bla bla, special program for charging).

Small difference and you can broke LiFe pack when charge it on LIPO program.

You should look for charger with LiFe program.

Regards!
m.
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Old 12-08-2009, 03:37 PM   #1796
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Ok to get us off the battery topic..

Has anybody tried the new offset rear hubs? I've seen them for sale over seas but never through shopkyosho so I haven't had a chance to get any yet.

Supposedly changes the rear geometry even more than the evo2 (by changing the wheel offset using the pivot balls) without changing anything else.
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Old 12-09-2009, 04:58 AM   #1797
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Quote:
Originally Posted by Brian Bosley View Post
Ok to get us off the battery topic..

Has anybody tried the new offset rear hubs? I've seen them for sale over seas but never through shopkyosho so I haven't had a chance to get any yet.

Supposedly changes the rear geometry even more than the evo2 (by changing the wheel offset using the pivot balls) without changing anything else.
Any pics? Whatelse would I need to change on a original RRR rear end to get them working properly?
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Old 12-09-2009, 09:20 PM   #1798
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Originally Posted by RC MARKET View Post
New rear hub for RRR Evo 2
9mm ball moved 2mm outside
I have no real idea what this means, nobody seems to have ever ordered it.

the part # is vz262
Attached Thumbnails
Kyosho V-ONE RRR EVO 2-ky-vz262.jpg  
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Old 12-10-2009, 04:01 PM   #1799
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Hi there i am new around here so i don't know if this is the right thread for my question. My car is the rrr wc. From photos on the web i saw that the evo 2 has socket head screws everywhere so i wonder if there is or will be a conversion set of these screws for my car. Or a way to get some of these screws seperatly. Sorry for bad english. Thanks in advance!
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Old 12-10-2009, 04:07 PM   #1800
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Quote:
Originally Posted by otinane86 View Post
Hi there i am new around here so i don't know if this is the right thread for my question. My car is the rrr wc. From photos on the web i saw that the evo 2 has socket head screws everywhere so i wonder if there is or will be a conversion set of these screws for my car. Or a way to get some of these screws seperatly. Sorry for bad english. Thanks in advance!
try this site...
http://www.rcscrewz.com/index2.php/s...ts/cPath/1_313
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