RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Looks good, Eman!!

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Thanks! I need to post some pics of it next to a 1/10 buggy, etc so folks can see the size comparison, especially with the wheel/tire combo I went with.

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Here are some pics of the CRT.5 next to a 1/10 Tamiya DT-02 buggy. The CRT has a slightly shorter wheelbase, but has a wider stance, and bigger wheels/tires for mine (they're not stock - stock CRT wheels are 2.2s, and about dead on the same size as a 1/10 buggy).

Dunno why the pics are crap quality though. Seems like I'm slipping lately on that. [&:]

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Hey as a side note there is one thing i hate about my crt.5 and that is there is NO body selection. You have the proline and the stocker that's it. SAVAGE XS body fits near perfectly. I had the cut small slits in the rear of the body for the suspension tower to fit and a hole for the cooling head. Other then that the body works real well on the crt.5 :)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Good to know about the Savage XS body! I might go that route if/when I trash this one.

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Doesn't feel like a 1/18th at all.. ha! :D

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

if you ever get bored with it buy a scrt10/nexx10 chassis, and center dogbones. Then slap a 1/8th scale buggy body, and wing on it as I demonstrate in the attached pic(I also used ome 17mm conversion hex's I had laying around with 1/8th scale buggy rims) :D
or use the shock towers off the SCRT10, and have a SCT ;)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Well, technically it's a 1/12 I think. :)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Interesting idea - I must say thought that SCT's don't really appeal to me. Although I must admit the Ofna SCT looks pretty good - I guess I feel like others just look so bloated - they try to look "scale" as all the SCT fans will say, but the body is so disproportionally wide that it's silly.

I mean, it's not really scale. They left the non-scale massively wide wheelbase of a ST and slapped on a wider body to cover the wheels, really. At least, that's what I feel in most cases.

By comparison, the little Tamiya F-150 (TA-02T chassis) is much more scale looking - it's very narrow in comparison. But it won't handle well in a race compared to all the "fat boys", so folks neglect it as a race vehicle. Real racers should adopt that scale of a platform and see how their skills fare then. :)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

yup I tried a SCT (slash 4X4) it was the width of a ST, but had the handling closer to my savage X. Generally I don't mind poor handling vehicles but the way that thing handled reminded me of a 1978 impala going 80 on an expressway in high winds. Basically like a boat on wheels which I did not find fun in the slightest(just like the impala I was in that time). Side note I've been working on making a 4wd SCT with a solid rear axle using HPI, and Axial parts to use that body with ;)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

So far I'm loving this thing - I've run it a handful of times - on a baseball diamond, on scrubby grass (beat down soccer field), mulch, dirt, some pavement. I've cartwheeled it several times, but really enjoy it. The tires are great for where I run it, the ground clearance is solid. So far so good.

I am using a Losi MSC12L ESC, and a used Team Checkpoint 19T money motor - it's a 540, but short. Running 2S LiPo.

The ESC is around 135 F, temps are fine. But the motor is hitting just over 190 F, so that's bad. I know my wheels/tires are a bit heavy and adding to it. I'm running a 14T pinion. I made that choice on the tires, knowing I wanted the capability they'd offer, and have to deal with temps.

I also know my motor is just a short term fit (if I ruin it, so be it - I got it for dirt cheap). I want to go brushless around 4000 kV - but now I'm wondering if I should go for a lower kV to keep temps down, or lower the pinion? Ideally I'd use the pinion I have and find the right motor since I don't have that yet. Or would I go for a longer 540 motor (more torque, less heat?). But a 540 BL seems overkill as it is on this 1/12.

Thoughts?

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Great looking CRT! I'm having a blast with mine but I need to change my motor/esc combo. The Tekin is acting strange.

The handling is great on the Truggy!

Which receiver box did you use? Is it waterproof?

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

The Rx box I used is from the SC kit I believe:
http://www.ofnawarehouse.com/product...oducts_id=2154

It's not waterproof, but it covers the Rx to give peace of mind for most splashes. It's not like I'm going to submarine the thing. :)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Thoughts on the motor? (See post a few ones up).

Anyone? ...anyone?.......Bueller...? ......beuller....?

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Emann, can post a picture of the copper paint you chose? I have always loved the copper color, and plan to use it on my OFNA Lx2e build. Thanks!

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Sure thing.

I used Tamiya PS-14:
http://www3.towerhobbies.com/cgi-bin...?&I=LXFFT4&P=7

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Awesome. Is that a metallic color as well?

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

as for motor something around 4000kv would prolly work best on 2S. If 3S I'd go to 3200-3500 pick the brand you like best ;)

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Sticking with 2s. Any need to drop lower than 4000 kV with my 14T pinion, given that I'm frying my lowly 19T brushed motor a bit over 190 F with these tires? :D

I just don't wanna buy a 4000 KV motor and then realize I shoulda gone 3600, when I fry the 4000.

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Hmm, doesn't say it's metallic, I guess not.

But it is awesome.

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

how did you mount the battery tray?

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

good point those look like HPI geolanders?

my 4000kv gets pretty hot with 1/8th buggy tires those are a bit bigger.prolly 3500kvish

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

Yep, Geolandars! Not sure how they stack up to 1/8 buggy tires (these are 2" wide, 4" OD). But 3500 or so sounds reasonable, I'll give that a shot.



echthelion - the tray is mounted on it's side, I just drilled 2 holes in the tray through existing chassis holes - I ended up using a nylock nut under the chassis to hold it on, so it's not flush - we'll see how that holds up over time.

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

well they are probably about 2X heavier than buggy rims, and about an inch more diameter wise.
holding my one I got sitting here with a foam in it (not on a rim) its a quite a bit heavier than my 1/8th buggy wheel that is mounted with foams.

RE: Ofna Jammin CRT.5 1/12 Truggy Build Thread and E-Conversion
 

The cars looking good buddy! Considering going brushless with mine now. I just got a hold of a Mamba Max Pro I think I'm going to drop in a 2700 kv motor in there and gear it for 110-120 degrees.