Irok22s Underground Crawlers Fastback!!

[irok22s]

Ok, So as some of you know I now have DickyT's fastback chassis. Build thread linkUnderground Crawlers Fastback chassis

I have had this for awhile now. I had to hurry and get it together for my last comp of the season, and I have one last gtg before the snow comes then I will tear it down and rebuild it. So for know this is a built thread.


Lets start with the current spec sheet:

Underground Crawlers chassis
Underground Crawlers D mount
Front servo/battery/link mount DickyT dremel special
delrin rear links and front lower DickyT specs
Aluminum Front upper links
Losi shocks
Losi gold springs
Vp hurst Dig
carbonfiber dig servo mount
Hitec mighty mini dig servo
Hitec 7950 steering servo
Axial trans with Hr metal gears
Vp High steer zero ack knuckles
Vp razors
STRC rear straight axle kit
STRC aluminum C's
Avid bearings
Axial cvds
Axial HD overdrive gears front
Axial HD underdrive gears rear
FELSENFEST spools
Junfac drive shafts
Eritex Rocker wheels
Nova custom robras tires.
Nova dd foams with tuning rings
Holmes pro handwound 35t
Castle Sidewinder esc
Castle 10amp bec
1350mah 40c 3s lipo


So on to the pics

This is how I recieved the chassis


The old rig




Old and busted next to the new hotness! (sorry blurry)


Assembly pics




All done next to old rig turned sportsman




Last but not least some action shots to hold everyone over for awhile








my favorite pic of the day!



Thanks for looking. Comments/questions welcome. Rebuild to follow starting mid november. First thing on the list is to make new body panels. Perhaps DickyT might want his "Nats" pannels back for some sentimental reasons? Let me know. I should have some more action pics this sunday

[Duuuuuuuude]

Lookin' good.

How is the OD/UD combo working for you?

[irok22s]

Originally Posted by Duuuuuuuude

Lookin' good.

How is the OD/UD combo working for you?

I have been running the over under sense august, I love it. Ill never look back. same set up is going in my honcho before sunday

[C*H*U*D]

It lives!!!!

[irok22s]

Originally Posted by C*H*U*D

It lives!!!!

yes it does. I love this chassis btw.

[DickyT]

Originally Posted by irok22s

Perhaps DickyT might want his "Nats" pannels back for some sentimental reasons? Let me know.

Nah, they are beat to crap, use them as a template to cut new ones and trash them. I have a t-shirt, photos and great memories, it is enough.

Good to see it running again, and hopefully well I'm looking forward to the rebuild.

[PipeDreams]

Looking good! Tires are just sick HUGE!

[irok22s]

Originally Posted by PipeDreams

Looking good! Tires are just sick HUGE!

yep

[irok22s]

So I totally for got my cammera the last 2 times I went out to run this rig. I am happy to report that I am very impressed with it. I have changed a few things tho. Mainly just shock fluid and shock pistons. I still dont really like the losi shocks I am going to try my traxxas big bores on it before the snow comes and stays... (have had 7'' already)

I'm gonna try to get out to my favorite spot again this week and hopefully wont forget the camera this time.

[irok22s]

So got some time in at one of my favorite crawl spots today. Ill let the pics do the talking.








This is a pretty nice climb!





Another nice comp line. pics in order..








and another one







my son next to that last down hill section.


random coolness
















tires doing work.





thats all for now comments welcome!

[irok22s]

Gonna try and get out again today.

[crazyorigin]

Awesome truck, I have spent a good bit of time looking @ pics of your truck in the Robra thread, looks like a mean machine, makes me want those tires pretty bad.

[irok22s]

Originally Posted by crazyorigin

Awesome truck, I have spent a good bit of time looking @ pics of your truck in the Robra thread, looks like a mean machine, makes me want those tires pretty bad.

thanks. Ya they are a great set of tires to have in the line up.

[PipeDreams]

Looks awesome! Tires are working for you thats for sure... can see a little stiffer sidewall might be nice in some spots!

[irok22s]

Originally Posted by PipeDreams

Looks awesome! Tires are working for you thats for sure... can see a little stiffer sidewall might be nice in some spots!

its plenty stiff... the first pic of tire folding is cause of a wicked ledge i was caught on the others are diging up hill...

[PipeDreams]

Ah yes that would do it lol... Cool keep the crazy pics coming lol

[DickyT]

The rig looks great Mike. How is it driving for you vs. what you were running before?

[JustinThyme]

Great pix! Great driving!



Fastbacks are required, resistance is futile!

[irok22s]

Originally Posted by DickyT

The rig looks great Mike. How is it driving for you vs. what you were running before?

Well it is for sure different than my previous rig. Some handling characteristics are similar and some way better. I havent found anything yet that I can say the old rig was way better at. I think they are close in handling on some things. However the fastback out does my old rig about 90% of the time.


This is my old rig.




The guts of the old rig








Some specs on the old rig
It has a Fubar skeeter moa chassis I narrowed 1/4'' and cut the side plate to fit the motor. The trans and motor were offset to the left so the weight of the dig and dig servo equaled it out left to right. It was set up as a 50/50 chassis.
Dna dig cheese ball bluebird dig servo
carbonfiber dig servo mount
delrin links equal length lowers front and rear and equal length uppers front and rear
tcs front and rear 4 link plates.
Traxxas big bores 20 wt oil front 35 left rear 30 right rear
losi white springs
35t hh sport motor
cc sidewinder
cc bec
hs170 servo


It handled well for a home built shaft rig. Tho it was a little top heavy and it didnt like to side hill when it got steep. I contribute that to the dig servo mounted up high. I for sure believe that the fastback is a big improvement. the 60/40 alone makes it better. lol...

Next spring I will have both of these rigs up and running at the same time. I had to rob the esc out of it for the fb so when I get a brxl for the fb I will have both of them to test side by side for some good comparison shots.

[irok22s]

How many of you guys with Fastback chassis are running traxxas big bores? I have quite a few hours of run time with my old rig and big bores so I have them tuned how I like them. I'm just looking for some opinions of big bores on the fb chassis...


I really don't like the losi shocks I have on the fb right now, idk why exactly they just rub me the wrong way I guess. I think that I am gonna switch them out for the traxxas ones before I take it out on the next run. Some testing pics may follow...