Optima mid (runner)

[madmaxx]

Hey guys... i finally finished my Optima mid after a few months of work, i received my EzRun today witch makes it a step closer to running this buggy, i need some suggestions on a 2.2 wheel set for this buggy since i really don't want to run the stockers, here are some pics...

[keithrc]

Nice Mid there mate I've got an EzRun combo in one my Mids and it goes well. If you can get hold of a set of Lazer ZX-R/ZX-RR rims & tyres they should work or possibly Lazer ZX-5 wheels.


Keith

[j0pp3]

That's an amazing looking runner! Like a shelf queen really

[ralphee]

Why not some Tamiya wheels, the buggy wheels in various guises are in abundance right now? Great looking Mid, lovely for a runner, which is my mode of thinking TBH, as id not want to run a scruffy chassis......this is just gorgeous.

lee

[madmaxx]

i think i over did it with the brush-less set up... This thing is super fast, actually is uncontrollable after half throttle... and today i got super mad cuz it got out of control at high speed and flipped a few times roadrashing my brand new Optima mid wheels

[madmaxx]

Here is a pic of the set up... Ezrun 9t 60A set with correct fan upgrade installed , 11.1 25C traxxas Lipo batt.

[naushad]

I think you might kill it...though I could also be wrong .

11.1 v with 9t does seems like a lot to push through a buggy which is 20 years old and has
No slipper clutch.

I assume the ez run you also have there is sensorless based which can make matters less smooth.

[klavy69]

11.1 v ...No slipper clutch.

a 3 cell lipo battery is way overkill for this application. Willing to bet it won't last long but if you dropped down to a smaller 2 cell lipo with less c rating it would make for alot smoother operation and easier to drive.

Gotta say I always wanted to try this for flat out speed runs with my mid and some tc tires
Todd

[Coelacanth]

I agree with the previous comments madmaxx, you're gonna grenade that gearbox! In my Barney build, one guy was telling me I would be all but doing the same thing with an 11T Tacon motor, even on 7.4V LiPo, even with everything else I did to bulletproof it. I disagreed on that opinion but a 9T, no slipper, no major gearbox modding and 11V, I don't think that car will be running very long before something blows up.

It would be pretty exhilarating, for sure...but not for long!

If you only ran a 7.4V LiPo, and adjusted the punch to minimum, you'd maybe be okay.

[madmaxx]

Check this out guys... a friend lend me a gps so i could clock the Optima Mid, well.. i did two warm up passes and was around 30-35 mph not hitting full throttle... so decided it was time for a full blast run.. got the car up to some speed and pushed the trigger all the way full... looked awesome... almost on a wheelie all the way but lost control and i hit a patch of grass and got airborne, flew for about 15 feet till it stopped with a tire of my parked car... went to see the damage and the gps said 49mph and it was still accelerating when i lost control, the Optima has some extensive damage... bent chassis, bent shock towers, rear wing broke of gear box, steering linkage... but it was FUN!!! i took of all the electronics since it will be a while before i fix it, here is a pic right after the crash...

[Coelacanth]

Well, as long as you had fun...your Mid's gonna live up to your forum nickname and look like a Road Warrior car before too long if you continue running it at 11.1V on a 9T motor.

I estimated my ordinary Zebra Optima with 14T brushed motor, 10T pinion gear and 8.4V NiMH battery was pushing over 35 mph (according to a speed estimator I found online based on gear ratios, tire diameters, motor RPM & voltage) and honestly, other than going back and forth in a straight line on my street, it wasn't really much fun. If the car's not controllable while turning and navigating obstacles, it's just plain too fast.

[sheriff]

Madmaxx that is now way to treat such a nice Mid, hang your head in shame!

[madmaxx]

i totally agree with you mark, that's the last time i will run that car like that... its just not designed for that much speed... but i wish i had a vid of it taking a curve at that speed... it just looks awesome... you guys know i love Optimas and seeing one hit 50 mph and still have some juice in it... WoW!!! as soon as i start the repair i will report on how well the gears held up, i ran the car about 30 times and would like to see the condition of the gears... and dont worry guys i will have this thing back to it original state in no time...

[klavy69]

Thanx for sharing. If its not a nice r/c car picture that I like the most the 'carnage' pictures are a close second

Todd

[HKS_TRD]

Man that thing looks beautiful, sorry to hear about the 'incident'

Those wheels that are on it in the first pics, do you know where I can get some?