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-   -   Viper RC - (https://www.rctech.net/forum/radio-electronics/455152-viper-rc.html)

Bob Barry 12-22-2012 05:31 PM


Originally Posted by Gene158 (Post 11584816)
I hear what you're saying but this wasn't a driving/line choice issue. I know 17.5 blinky isn't super fast but I know it's quite a bit faster than what I saw with my buggy. As soon as I drove it, I thought "this can't be right." And to have such a dramatic increase in power by using the boosted profile seems a little weird too.

What were you geared? I have blown by guys like they were in reverse and it was because they were 4 or 5 teeth too low.

Wildcat1971 12-22-2012 05:31 PM

What gearing

RavensNightFury 12-22-2012 05:42 PM

no diffrent all together man

Gene158 12-22-2012 06:52 PM

My gearing was 31/75. Apparently, most people at my track seem to be happy with something around 31/72 so I got the new spur, just didn't have time to put it on.

Wildcat1971 12-22-2012 06:55 PM

I would get some 32 to 34 pinions also. How much motor timing?

Gene158 12-22-2012 07:05 PM

I haven't messed with the motor timing. It came set at 30.

Wildcat1971 12-22-2012 07:31 PM

I run 44 deg on my reedy sonic 17. The viper guys can maybe suggest

C Branch 12-22-2012 08:25 PM

I have done a lot of testing with mine and I am now at 32/72 with full motor timing and I keep going up on the PWM. I believe I am at 6000ish. It just keeps getting faster and faster!! I can probably go up a tooth or two on the pinion even, as the temps are still 120ish....

Gene158 12-22-2012 09:25 PM

I think I got it figured out. I'm still using the 4th profile but I changed run mode from open race to blinky so I think I'm all set now.

silvalis 12-22-2012 09:29 PM

I'm at 40deg reedy sonic, 30/69 gearing, rb6. Profile 1. Brake 1600hz. Throttle 12000hz.
Temps around 55 or 60 after 5 mins...

shagnat 12-22-2012 10:33 PM

How do I enable reverse and maintain full power for forward and reverse? I understand "practice" mode is the only way to do this, but, doesn't "practice" mode limit power?

Also, where should I set the SBEC voltage with a Savox 1258TG?

PLEASE help me!

nikos2002 12-23-2012 06:48 AM

I always run SBEC at 6.0, never felt like I needed it to be more twitchy than that with my Futaba servos.

You can put any profile into reverse by making the change to practice mode. Just keep in mind reverse turns off boost mode. Too many people having issues early on running reverse with boost. System wasn't made to work that way.

Gene, sounds like everyone pointed you in the right direction on gearing.

shagnat 12-23-2012 09:45 AM


Originally Posted by nikos2002 (Post 11586122)
I always run SBEC at 6.0, never felt like I needed it to be more twitchy than that with my Futaba servos.

You can put any profile into reverse by making the change to practice mode. Just keep in mind reverse turns off boost mode. Too many people having issues early on running reverse with boost. System wasn't made to work that way.

To have reverse is not possible if I'm running boost, etc.? :cry:

nikos2002 12-23-2012 10:59 AM

If you can Congo the car with boost --- you don't need reverse. :cool::nod:

AndrewTom 12-23-2012 01:32 PM

I like 40* on my Viper 17.5, Track is switching to Stock Blinky (us to be 17.5 open/boosted) for next year. I went to 30, 35 and I like 40 for when it is packed down, and i think 35 will be good when the grip isn't great.


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