Asharus

iTrader: (42)

gonna run blinky 17.5 at motorama with my b4.1

i have a 72 and 75T spur and pinions from 30-36

am i set or should i get a 69T spur too?

markiemark

iTrader: (23)

Im running 1s 17.5 blink with a stock rotor and timing on center mark with 101mm roll out .

I seem not to have low end rip like the guys with the 12.3mm rotor.

if i install the 12.3 rotor would that add more lowend or would it add to much lowend and will i need to up my timing or roll out?
OR
Is the center mark on timing to high and i just need to turn it down more?

Walter Johnson

iTrader: (2)

any tips on cleaning these motors?

Steve S

iTrader: (5)

Can anyone recommend a starting esc setup and rollout for 17.5 boosted 1/12? Thanks.

JamesL_71

iTrader: (13)

Well the stock rotor is the 12.3mm Broad Powerband... Unless you got one of those Revtechs from 3-4 months ago that came with the 12.5mm High Torque rotors. Have you taken the motor apart and measured the motor/looked at the colored ring?

The 12.3 rotors tend to produce more rpm and top end, but less torque and acceleration than the 12.5s.

I dont know your track size and layout, but if I had to guess... I would say your rollout is a little high for the 12.3mm rotor. I found that it doesn't like to pull all that much gear. In order to take advantage of its high rpm, it seemed to like mid 90s rollout. Again, this is just what I found through testing at my track.

If you move to the 12.5mm rotor, any of them should have a bit more low-mid range rip than the 12.3s. I tested the 12.5 High Rpm and 12.5 High Torque rotors in blinky 17.5 12th, and was able to get identical laps out of both rotors. And both 12.5s were .1-.2s a lap faster than the 12.3s on our track/layout. The 12.5 H-RPM seemed like it would be better for a more open layout, while the 12.5 HT seemed better for tight layouts with lots of slow corners that required more acceleration.

Ive also found that the 12.5 rotors aren't anywhere near as sensitive to gearing as the 12.3s. With the 12.3s, it seemed like they had a 2mm range of rollout where they were the happiest. Any higher or lower and you would suffer with noticeably slower laps, sluggishness out of the corners, and/or much quicker fade.

The 12.5s had more like a 3.5-4mm range of rollout where they could turn identical fast lap times. The only difference I saw with the rollout changes was how soon the motor starting fading... So I gear for fastest average lap over a 4-5min period.

Ive generally been pretty liberal with timing too... I usually dont run any lower than the 2nd to last hash mark.

What are you calling the "center mark"? In terms of # of hash marks?

Edit: FWIW, I was finally able to match my fastest 12.5mm laps with the stock 12.3 rotor after much trying, but it required A LOT of timing. Maybe that is how the 12.3 likes to be run, but I felt nervous running the timing a little past the "+" mark. And in order to turn those fast laps, I needed pretty clear track to build and maintain as much momentum as possible. During qualifying/race, with traffic everywhere, I suspect it would be easier to drive a 12.5 to fast laps than 12.3.

Paul S

iTrader: (19)

Going with Revtech 17.5 for our house VTA class.

17.5, 1 S, blinky. I am going to run it in a TC5. Any help? Motor timing? Rollout? I have been at about a 3.10 rollout currently. Most of the guys at my track are in that range.

tr1kstanc3

iTrader: (18)

I've been testing a similar thing with the rotors. Right now I am running the 12.3 broad powerband rotor at 4 positive hash marks of timing with a 96mm rollout. I had good success at our last club race using this.

What did you find to be a good starting point for the 12.5 high torque rotor?

Robert Drew

I'm running my Revtech 17.5 in non-timing geared 72/34 with the timing all the way up on the motor. It runs sweet! Plenty of top end and bottom end and it runs nice and cool. I'm running it with a Novak Havoc Pro SC.

JamesL_71

iTrader: (13)

PMed

Autocratic

iTrader: (26)

What would be a good start gearing and timing for the 17.5 in blinky on the Durango 210? 2.6:1 ratio. The track I run at really requires low end punch in 17.5 so I would be using the 12.5mm HT rotor eventually, however would start on the standard rotor. I have available 69 and 75T spurs, and up to 35T pinions.

Asharus

iTrader: (42)

Thanks Robert!

Robert Drew

No problem!

cwoods34

iTrader: (10)

Anyone play around with a 12.5 high-RPM rotor in a TC (17.5 stock)? I know the magnet strength is a little lower.... maybe too low to be running in a 1380g car? I haven't personally checked a high-RPM rotor for numbers.

I have 2 very strong purples that feel good, and a third one that's a bit older and a little weaker (never cooked). Could I get the same effect in terms of gearing/RPM with the weaker purple? I find myself liking the car with more timing and shorter gearing given our typical layout.

Congrats to everyone with success at Snowbirds!

Redvet79

iTrader: (2)

Which way is the best way to gear for 6.00 FDR.
106s 35s =6.057
115s 38p =6.053
21.5 revtech in vta

Thanks

EAMotorsports

iTrader: (79)

We are looking for a new distributor in the UK and Europe at the moment. If anyone has any leads or contact info for one I will make it worth your while if everything goes through.

[email protected]

Thanks
EA