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-   -   Tekno NB48 (https://www.rctech.net/forum/nitro-off-road/718521-tekno-nb48.html)

underway 09-01-2014 03:02 AM

pretty sure goldy's issue is a locked center diff due to deformed washers. That is exactly how my car felt. NO center diff action. Abrupt power to the rear and makes the car uncontrollable. New washers, Car back to sexy.

I think the tank screw crack thing maybe a freak occurrence not sure i would call it a bug. I have pounded my buggy and have never come across this... I just got up and looked at my tank. to make sure i understand u are saying a side blow forces the screw to penetrate into the main tank compartment?

vandalzzz 09-01-2014 06:26 AM

Nope, it doesn't penetrate, screw acts like a lever creating side momentum on the screw hole' wall.
Also i've inspected body and found signs of the contact between that fuel clip and body.
I know that maybe i'm the only person who've met this issue, but i see possibility of repeating this when fuel clip mounted facing left side.
p.s.: i've run almost whole summer with cracked tank chasing that inconsistent trouble, almost ordered new engine thinking i've ruined my first one, thats why i think this weird rare issue should be here, maybe someone else chasing his tune too

madweazl 09-01-2014 06:28 AM


Originally Posted by vandalzzz (Post 13505280)
So, here is another one sort of bug report.
Issue: new (revised) tank can be cracked causing pressure problems and therefore tuning issues. Crack is so small and located in unobvious place making pressure test close to impossible.
How to repeat: side impact slightly above pipe line where most stress is taken by the outer rear fuel line clip.
Result: screw holding clip causes crack of the tank body starting from the screw' hole.
Major issue is about unstable nature of this damage: with body off and clip aligned well there is vrtually no pressure leak. With body on it applies some force to the clip, and not so soft landings temporary increases this force. While buggy is being upside down force is high enought to remove all pressure from the system and cause flameout.
But when you take tank off and decide to make leak test, you remove clips and screws also. or at least don't apply force to that rear outer clip, therefore silly drivers with weak lungs don't have a chance to detect this leak.
Workaround: mount this clip facing rear left wheel or/and apply some material betwwen tank sidewall and clip.
Hope this will help.

Mount what clip facing the left rear?

madweazl 09-01-2014 06:29 AM


Originally Posted by Stirex (Post 13505244)
How was Rev?

It works fantastic down there; I'm heading back down today for a little more testing but dont expect to find much.

vandalzzz 09-01-2014 06:35 AM


Originally Posted by madweazl (Post 13505620)
Mount what clip facing the left rear?

Yep, try to move it as far away from left side as possible, if you have stock body you can check either they're touching each other or not.

madweazl 09-01-2014 07:12 AM

What clip are you talking about? Fuel line retainers?

NITRO 540 09-01-2014 10:44 AM

I keep having flame outs after a pit stop. New tank, new fuel line and changed exhaust pipe. I have a long pressure line. I tried every trick in the book.
I do know if I fill the tank up to the fuel tank neck and not over fill the tank
It's ok.
I don't have this problem with my truggy. Any suggestions? Besides don't over fill the tank.

Maximo 09-01-2014 10:54 AM


Originally Posted by NITRO 540 (Post 13506149)
I keep having flame outs after a pit stop. New tank, new fuel line and changed exhaust pipe. I have a long pressure line. I tried every trick in the book.
I do know if I fill the tank up to the fuel tank neck and not over fill the tank
It's ok.
I don't have this problem with my truggy. Any suggestions? Besides don't over fill the tank.


what kind of fuel do you use ?

NITRO 540 09-01-2014 11:11 AM


Originally Posted by Maximo (Post 13506160)
what kind of fuel do you use ?

I use Byron's 30/11. I run a Picco Boost 5TR. I use a OSp4 plug.

MSMike 09-01-2014 01:08 PM

hello,

I play with the thought me a NB48 pick.
Now I have heard if you want to install another clutch you have to change something on the engine mounts.

What is there to it Can you help me?

I prefer the Buku Clutch:-)

Cappy 09-01-2014 01:34 PM


Originally Posted by MSMike (Post 13506388)
hello,

I play with the thought me a NB48 pick.
Now I have heard if you want to install another clutch you have to change something on the engine mounts.

What is there to it Can you help me?

I prefer the Buku Clutch:-)

I dont think there's too much to change if you want to run a Different clutch setup.. There's 2 diff engine mounting setups front engine setup and rear engine setup Im running the Werks pro clutch with the front engine position and Werks fine. Just have to do a lil Clutchbell shimming to find that sweet spot

FastPete 09-01-2014 01:51 PM


Originally Posted by NITRO 540 (Post 13506149)
I keep having flame outs after a pit stop. New tank, new fuel line and changed exhaust pipe. I have a long pressure line. I tried every trick in the book.
I do know if I fill the tank up to the fuel tank neck and not over fill the tank
It's ok.
I don't have this problem with my truggy. Any suggestions? Besides don't over fill the tank.

I had that happen, and the motor was a bit rich. When you fill it, it goes richer. Hows the temps when it comes in, and can you lean it out a tad?

I also usually clean it out before the pit guy sets it down after refueling.

DBL15 09-01-2014 01:57 PM


Originally Posted by FastPete (Post 13506455)
I had that happen, and the motor was a bit rich. When you fill it, it goes richer. Hows the temps when it comes in, and can you lean it out a tad?

I also usually clean it out before the pit guy sets it down after refueling.

Same with me it happened when I was using a fuel gun it would flame it ended up being to rich since we have changed that all good I can now use fuel gun or fuel bottle no more flame outs in pit stops

Try leaning it a bit and see how you go the picco likes to run pretty hot as well bud

madweazl 09-01-2014 07:29 PM

Grrr, typed out a long post and lost it!

The down and dirty: AKA Catapults are money at Revelation. I ran mediums and the traction was fantastic while the tread pattern was very forgiving. Next favorites were the Beta Cubez (soft compound but in reality these are somewhere between medium and soft for AKA and Proline). They were pretty forgiving, had good tread wear, and produced very good traction. Proline Blockades (soft) were my least favorite of the three; a little more aggressive at turn in and tread wear was way lower as expected compared to the others. Overall traction was very similar across the board with all three. No M2s or X2s were available to try but I bet they would have worked well with better tread wear.

The track is starting to get rutted up but the only changes needed are lighter shock oils. Mo's setup just continues to impress. They're racing tomorrow night and I'm excited to see how it does. During practice I've literally been able to turn inside anything at any point during any corner on the track while carrying more speed.

Believe I met ThreatRacing down there today but I'm not positive (didnt exchange board names). He was running the rear engine setup and our buggies were pretty much polar opposites. His buggy has rear traction on lock down but gives up a substantial amount of turn in. It works pretty good mid and coming out of the twisties but feels exceptionally tight. It was a lot of fun to try such a drastic setup change.

Oh, switched over to Punch fuels today. Wish I could report that I picked up 4 minutes of run time and the temps dropped 20 degrees but in the end, it ran just like VP (and Nitrotane, and Byrons, and Striketeam, and any others that I've forgot about over the years). My wife does however dislike that it is clear when she is refueling for me.

vandalzzz 09-01-2014 10:10 PM


Originally Posted by madweazl (Post 13505691)
What clip are you talking about? Fuel line retainers?

I'm talking about clips holding fuel line.


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