ghoppa

iTrader: (63)

run your PWM between 5000Hz-9600Hz for stock... the lower the PWM frequency the "punchier" the car will react, BUT you will also increase motor temps..

hope this helps!!!

rc pete

iTrader: (6)

Check out Mark Symka's 1/12 17.5 setup on the Viper RC website, on the VTX1 page. Maybe gear it down with less timing to start on the safe side.

pcar951

iTrader: (23)

For me, in spec class I always run the lowest throttle PWM for maximum bottom end, 100% punch and + expo on throttle curve if I feel the need.

micrors4guy

iTrader: (50)

I have tried that and it will not pull up for me.

I ran my setup for the 1st time last weekend and was getting pulled in the infield but was comparable on the stright.

78/54 43mm tires with a d3.5 and 12.5 rotor im +15 on timing on the can for 25* over all. I am thinking about going +25 and dropping the pinion to a 50* as i still had plenty of room to get more temp into the motor. I was coming off at 135* after 8 mins. The guys that were pulling me had more punch for sure and i can defiantly use a little more aggressive feel.

micrors4guy

iTrader: (50)

I just dropped from 8k to 2k and im going to give that a shot.

pcar951

iTrader: (23)

I think you're going in the right direction, your rollout is a little high. You'll probably find the D3.5 timed over 20 degrees just makes more heat, the sweet spot seems to be 15-18 degrees in my experience. When I ran the D3.5 in 17.5 pan car, my roll out was usually in the 87 range for an 80ft. straight.

ghoppa

iTrader: (63)

just have to ask, but your using Program #5 right??? had to make sure...

micrors4guy

iTrader: (50)

we are running on a 40x70 track. I have a video i can post.

this was my first time running 12th in over 2 years and the 1st time running blinky.

micrors4guy

iTrader: (50)

a30 profile 5

pcar951

iTrader: (23)

40'X70'... if you go 78/50, that'll bring you to 86.5 rollout, try it at 15 degrees timing and increase 1 degree at a time until you're happy with the straight, watching your temps. With shorter gearing and lower drive frequency it should be a lot punchier for you.

micrors4guy

iTrader: (50)

started the day a 75/49 with 5* timing on the can and was way off pace.

when you are saying 15* do you mean on the can or overall? because i am at 15* on the can currently and i am told there is 10* built into the motor already?

pcar951

iTrader: (23)

15 on the endbell marks. So with 75/49 you were close on gearing at around 88 rollout but probably didn't have enough timing on the motor at 5 degrees.

micrors4guy

iTrader: (50)

here is a video of the track and me running. I am the yellow/white car (Rob Jensen) who takes the win for the round. However you can see how much faster the other cars are compared to mine.

http://youtu.be/G1jl5IjNpTg

mtaddei

Ciao micrors4guy,
i'm racing in touring 13.5 blinky and F1 21.5 blinky, i saw your video and i noted that in the straight the car was faster in the second half part of it, in my opinion it means that your fdr was too long, you should try to reduce the pinion of 1 or 2 tooth and as all the other guys already wrote increase a little more the end bell timing.

Ciao
Max

micrors4guy

iTrader: (50)

Yah thats what I will try. Thanks everyone for the help. As an offroad guy comming to onroad the rollout stuff and fdr is all new to me.