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Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 6:19 pm
by zuki250
Thanks guys....i have been working pretty hard on her.....Colecanth...I am going to keep her mostly plastic as I will be racing it. I saw your builds..pretty sick..i actually am going to message you, i have some questions...but the way you mounted your esc...i was going to do the same thing...or use a little tray that came with the car...its pretty cool, hangs down from the chasis...ohhh and these came today....just finished gluing them up....so i am going brushless and the class can only use a 13.5 or 10.5 turn...probably gonna go 13.5..any suggestions and also any on an esc for it...I def want some sensored to take a little shock out of the initial start up

Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 6:53 pm
by Coelacanth
zuki250 wrote:i actually am going to message you, i have some questions...but the way you mounted your esc...i was going to do the same thing...or use a little tray that came with the car
Sure, PM me anytime. I try to put all the info out there in my build threads, but I'm always happy to share further details. I liked mounting the ESC that way, I chose that position to lower center-of-gravity and also move some weight forward. The Optimas are kind of known to have on-acceleration understeer, and I figured while doing that build--due to converting it to RWD with no diff and other drive elements up front--that I'd want to compensate for the reduced weight up front. The one thing you have to make sure of, BEFORE you sticky-tape the ESC into place, is that your steering servo and tie-rod adjustments are all dialed in FIRST...because the ESC blocks access to the servo horn.
I def want some sensored to take a little shock out of the initial start up
I'm not sure what you mean by this...?
To be honest, I'm running a Tacon sensorless system in Barney and a Leopard sensorless system in OptiMutt, and both accelerate very smoothly (I turned the punch down to avoid wheelying all over the place) and have no cogging or hitching at slow speeds. Both are using the same FlySky receivers and GT3B transmitter. I've read of people having issues with slow-speed cogging, but neither of those cars have it. Thus far, I haven't seen the need...but I'm not a competitive racer, so factor that in, too.

Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 6:59 pm
by zuki250
ahh..i have had some cogging in my Short course...but i put in a sensored esc...soooo smooth...just trying to make the drive train survive as long as i can, as i don't have any spares yet...

Well i do have a Kyosho slingshot..that uses some of the same parts, so i could rob some i guess
Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 7:07 pm
by Coelacanth
What ESC, motor, Tx & Rx combo are you running?
Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 7:10 pm
by zuki250
In my Race truck i have a Revtech 4 pole 400kv with a hobbywing 150amp esc with a spektrum dx4s...no cogging there!!...and its silly fast
Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 7:23 pm
by Coelacanth
I have cogging/rough acceleration issues with CYANide but I've been too busy with other stuff to fix it. I know it's something in my combination because I'm using the same radio/receiver for all three of those cars, but that one has an older LRP ESC which I think is the culprit. I don't think it's the SpeedPassion 17.5T motor or receiver. I have another ESC to swap in but I have to solder on some ends first, and I haven't been motivated to break out the soldering iron lately.

Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 8:31 pm
by zuki250
Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 9:17 pm
by Coelacanth
Very nice and clean, looks great. Quite an improvement from how you received it.

Re: My Optima Mid Rebuild
Posted: Mon Nov 18, 2013 9:19 pm
by zuki250
Thnx..not gonna lie my fav part is the servo wire wrapped around the support post...haha that came out so clean
Re: My Optima Mid Rebuild
Posted: Tue Nov 19, 2013 9:50 am
by j0pp3
Nice work! My favorite chassis
Do you get a matching offset with those ZX-5 wheels? I mean, are the wheels lined up front/rear?
Re: My Optima Mid Rebuild
Posted: Tue Nov 19, 2013 10:15 am
by zuki250
They are pretty lines...maybe a tiny bit wider
Re: My Optima Mid Rebuild
Posted: Sun Feb 16, 2014 6:48 pm
by zuki250
Quick update...swapped out the servo, and did some mods to make the esc fit...she works great now
Ok here are some pics...I had to make some more changes...she works now and hauls @ss....just need to add some camber links and she is ready for the vintage national race this year!!
I cut and flattened a part of the chassis to fit the tekin esc...I had an lrp in that fit perfectly on it's side...but was unhappy with its performance

Re: My Optima Mid Rebuild
Posted: Sun Feb 16, 2014 6:49 pm
by zuki250
Re: My Optima Mid Rebuild
Posted: Sun Feb 16, 2014 10:45 pm
by zuki250
Wasn't happy with the wing position..moved it forward much better than before

Re: My Optima Mid Rebuild
Posted: Tue Feb 18, 2014 11:19 am
by Coelacanth
Looks great! I'd probably remove the stickers, buy a repro sticker sheet and re-apply them. Those wrinkly, peeled-up stickers are kind of distracting.
I know you're going with a new body, but that body looks fine...just the stickers need to be replaced.