Really 18 or 19 wow
I just did the 19 pinion and wow

Total Reduction Ratio
9.95789 : 1

Is that to high of top end. I want loose the bottom?




18 pinion

Spur/Pinion Reduction Ratio (?): 2.32 : 1
Total Reduction Ratio (?): 10.51111 : 1
Tire Circumference (?): 12.88 inches (327.17 mm)
Rollout (?): 1.29:1
Total Motor Speed (?): 35616 RPM

Theoretical Maximum Vehicle Speed (?): 41.33 mph (66.39 km/h)




19 pinion

Spur/Pinion Reduction Ratio (?): 2.32 : 1
Total Reduction Ratio (?): 9.95789 : 1
Tire Circumference (?): 12.88 inches (327.17 mm)
Rollout (?): 1.29:1
Total Motor Speed (?): 35616 RPM

Theoretical Maximum Vehicle Speed (?): 43.63 mph (70.08 km/h)


I will try that for sure. wow
Thanx a mill man.

one thing I do to determine my gearing in 1/8 buggy or other classes where I am not using boost, timing, etc is to gear to top out towards the end of the longest straight. From there, I adjust my gearing depending on the temps I am seeing. Usually, about 1 tooth if that.

Seems to work well, motors stay cool, and lots of power all around.

If you find you are basically coasting down the longest straight after only 1/4 of it, you most likely are undergeared. Seen a variety of people doing this and motors coming off toasty.

Isnt it just,

Motor is Hot ESC is cool: Gear Up
Motor is cool ESC is Hot: Gear Down
Motor and ESC both warm: Perfect

Thats how I do it for 4wd. 2wd they never really get warm enough and go more by feel.

Undergeared = ESC hot
Overgeared = Motor Hot

At least that's the general rule of thumb.

It is a lot better. I only had a 19 pinion.
I going to have to order me a 18t pinion

Thanx you all for the help

Nikolai what is the protocol for returning motors to be repaired?

You can get a motor hot by being undergeared as you basically have the motor high revving most of the time. Anytime I see someone basically cruising down the straight at like full throttle after only 1/4 of the straight I cringe as I remember being that guy and wondering why my motors were hot till I got word from the late Big Jim, one of the premier motor guys prior to his passing, to use that method.

That is why in general I use the end of straight top out method for classes where I don't use timing to adjust gearing. Some of that can also depend on if the motor can pull the gearing too. This is why on my old SC10 4x4 I couldn't do that method with my 540 4 pole 4000kv motor. it just got too hot and benefited from smaller pinion combined with alittle timing at the higher RPM ranges.

But, in general for stuff like 1/8 buggy, that gearing suggestion hasn't failed me at all.

Thank you Cain

info from Danny

Internal gear ratio is 4.0 (10T pinion, 40T ring gear)
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CalcRC app had it at 4.3

follow the steps here:

www.viper-rc.com/contact.php

nikos2002: not sure what you guys have up your sleeve for future motor design, but if you viper guys for your 1/10 scale line plan to do new motors in the future, that dual sensor port setup that the Peak motors have looks pretty interesting and would love to see something like that on a future viper motor revision.

What about the black motors that were in the works in 1/10?

We have some good design ideas we have worked with. The biggest thing right now is a combination of waiting for ROAR to finally make illegal motors, illegal. And we can't make VF8 motors fast enough, and VF4 is still waiting.

As for the dual port -- kind torn - little gimmicky. Make it one way or another. but you never know...

FYI: our VF8 motors are plenty fast. They can't be produced fast enough. lol

Im looking for a Pro Gauge any one have one for sale pm me

Anyone running Tekno 410 help with setup on VXR 4.5 copperhead give me some good starting spots