R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 12-17-2011, 07:29 PM   #16
Tech Addict
 
scary_jerry's Avatar
 
Join Date: May 2011
Location: Utah
Posts: 514
Default

Jake, great resolution on the photos. With that much detail i'd give Neil at Clockwork Motors a call and ask him to give an assessment. I'm drawn to the 'scuff' on the cylinder wall. Had a cylinder like that after my 2 speed stopped shifting in a main and i was not about to lift off the trigger.

(remember rc a\c at 'riverside raceway',
i ran 3.5K&B tunnel hulls at 'fairmont park'
and actually got to see action at 'thorp raceway'
as a spectator...almost forgot my first rc flight
at 'mile square park').
scary_jerry is offline   Reply With Quote
Old 12-17-2011, 07:40 PM   #17
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by quadracer111 View Post
Damn traxxas 3.3 engines. Such a piss off. Make it half way across the track, flame out. Take it off the track, try to replicate the issue, wont do it, throw it back on the track, flame out.

A picco .26 solved that issue. And when that kicked the bucket I just went brushless.
I agree 100%, mine crapped out after the circlip came loose - Picco .26 red dot in my Revo is working awesome!

But this thread is about O.S. .12TR problem I am having for my onroad car - I put a Picco .12 in it which is running flawlessly but I still want to get the O.S. going if possible, when it ran well it would go like a scalded dawg!
Jake C6R is offline   Reply With Quote
Old 12-17-2011, 07:42 PM   #18
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by scary_jerry View Post
Jake, great resolution on the photos. With that much detail i'd give Neil at Clockwork Motors a call and ask him to give an assessment. I'm drawn to the 'scuff' on the cylinder wall. Had a cylinder like that after my 2 speed stopped shifting in a main and i was not about to lift off the trigger.

(remember rc a\c at 'riverside raceway',
i ran 3.5K&B tunnel hulls at 'fairmont park'
and actually got to see action at 'thorp raceway'
as a spectator...almost forgot my first rc flight
at 'mile square park').
Thanks, Jerry! What did he say about yours? I don't see any scuff, maybe it's the pix because it looks pretty good in there. I even asked my wife to look at it and she said it looks fine so there you go! After all wives know everything!
Jake C6R is offline   Reply With Quote
Old 12-17-2011, 07:49 PM   #19
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by fairgo View Post
Front bearings in onroad engines do not have an airtight seal. If you get a new bearing wah it out and hold it up to the light, you will see what I mean and the ones with the biggest gaps are the metal sealed.
I don't think I have a big leak but I am out of ideas. If this doesn't work Valk will he be getting an engine for cheap! LOL
Jake C6R is offline   Reply With Quote
Old 12-18-2011, 01:55 PM   #20
Tech Elite
 
valk's Avatar
 
Join Date: May 2011
Location: Victoria, BC
Posts: 2,025
Trader Rating: 13 (100%+)
Send a message via ICQ to valk Send a message via AIM to valk Send a message via MSN to valk
Default

no complaints here! i know my motor is leaking like a siv i just cant be bothered to spend money on the nitro car lol.

you could always use the method of checking for vac leaks on 1-1 cars. just get her on a stand running at med throttle and spray some soapy water around the flywheel and all the seals. you should know right away if its a bad enough leak to make it run screwy.

my 12tr has a cracked and chiped out carb seal that definitely doesnt seal properly. my exhaust mani gasket is worn out and ive never taken the carb apart to clean, yet it will idle all day and only sometimes dies on refuel stops. np. i just have my pitman lift the car, rev the piss out of it for a second to build up pressure and let it go.

your motor looks to be in better shape than mine.
valk is offline   Reply With Quote
Old 12-18-2011, 05:35 PM   #21
Tech Addict
 
scary_jerry's Avatar
 
Join Date: May 2011
Location: Utah
Posts: 514
Default

Jake, sorry if i wasn't seeing 'scuff'. I had already replaced that fried motor before i found 'Neal' at Clockwork in pursuit of monster mill.

Having wife to support hobby madness is good. I put her down as my 'sponsor' at Las Vegas Grand Prix (3d place A main IGT), but mine couldn't tell 'scuff' from micropolish. tsk tsk
scary_jerry is offline   Reply With Quote
Old 12-18-2011, 07:28 PM   #22
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by scary_jerry View Post
Jake, sorry if i wasn't seeing 'scuff'. I had already replaced that fried motor before i found 'Neal' at Clockwork in pursuit of monster mill.

Having wife to support hobby madness is good. I put her down as my 'sponsor' at Las Vegas Grand Prix (3d place A main IGT), but mine couldn't tell 'scuff' from micropolish. tsk tsk
Congrats on the 3d place! I am sure it was your wife/sponsor that got you the win!
Jake C6R is offline   Reply With Quote
Old 12-22-2011, 05:13 PM   #23
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default Case is History - Anyone Have One?

Problem found. I removed the front bearing and saw a very small hairline crack in the case. So it's history. Just for laughs I removed the rear bearing and it wasn't exactly excellent either.

So now I have all the guts plus new parts on the way and no block. The crank, piston/sleeve, rotary carb, etc are good. Being delivered are a new front bearing, HSN and LSN o-rings and carb gasket.

The question is now try to sell the guts and new parts or try and find a OS .12TR block with at least a good rear bearing? It's not worth the money to replace the rear bearing - too expensive.
Jake C6R is offline   Reply With Quote
Old 12-22-2011, 06:28 PM   #24
Tech Master
 
el salvador's Avatar
 
Join Date: May 2006
Location: Western Seattle Bucko!
Posts: 1,072
Trader Rating: 7 (100%+)
Lightbulb

Jake, you could load all the good parts into a TZ block if you had one handy.

Before you found the crack, I was going to suggest checking the Thermo Insulator on the Carb base (OS #21165010),
a common issue. I've had Two TZ's (sold one) and the "Old/TTrusty TR (w/TZ carb)
still runnin strong in the "Clubs RRR Loaner Car" that I own & maintain for the use of recruiting nOObs into Nitro TC Racing................
__________________
ARC R8 X2/ Max RP9 or O.S. R2101 ,Capricorn LAB C02-TOP Elite R, ARC R11....

"Every Cemetery in Chicago Votes Democrat!"
el salvador is offline   Reply With Quote
Old 12-22-2011, 07:13 PM   #25
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by el salvador View Post
Jake, you could load all the good parts into a TZ block if you had one handy.

Before you found the crack, I was going to suggest checking the Thermo Insulator on the Carb base (OS #21165010),
a common issue. I've had Two TZ's (sold one) and the "Old/TTrusty TR (w/TZ carb)
still runnin strong in the "Clubs RRR Loaner Car" that I own & maintain for the use of recruiting nOObs into Nitro TC Racing................
Thanks for that, bro! Good to know everything will fit. Looked on eBay and found a crankcase with bearings for $70 but I am hoping for a cheaper solution. Maybe someone will have a used one in good shape that they want to unload. Especially if I can use the new front bearing I bought.

Are all the .12 TZ models the same as far as the guts?
Jake C6R is offline   Reply With Quote
Old 12-23-2011, 12:47 AM   #26
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,282
Send a message via ICQ to Roelof
Default

Just weld or solder the crack? It is possible with aluminium or a more simple way: use a glue. I have done it in the past with a metal glue.
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 12-23-2011, 08:17 AM   #27
Tech Addict
 
scary_jerry's Avatar
 
Join Date: May 2011
Location: Utah
Posts: 514
Default

Jake, good news you found the 'gremlin'.

I like Roelof's take on it...fix it. I'd check with a jeweler to see if they could suggest some repair method. But i would attempt a fix before 'teeing it up' on the back 9...

PINGGGGG>>>>>>>>>>>>>>>>>>(*%:#).
scary_jerry is offline   Reply With Quote
Old 12-23-2011, 08:38 AM   #28
Tech Addict
 
Jake C6R's Avatar
 
Join Date: Jan 2011
Location: Simi Valley, CA
Posts: 557
Trader Rating: 8 (100%+)
Default

Thanks for the suggestion guys! If I can't find a used case Valk wants to take it off my hands as he needs the internals.

As for the case, well let's just say it is not going to survive, it received the brunt of my frustration in my vise....CRUNCHHHHHH LOL

Last edited by Jake C6R; 12-23-2011 at 08:59 AM.
Jake C6R is offline   Reply With Quote
Old 12-23-2011, 09:25 AM   #29
Tech Addict
 
scary_jerry's Avatar
 
Join Date: May 2011
Location: Utah
Posts: 514
Default

I can relate Jake.....][][.......][.][.
scary_jerry is offline   Reply With Quote
Old 12-23-2011, 11:03 AM   #30
Tech Elite
 
valk's Avatar
 
Join Date: May 2011
Location: Victoria, BC
Posts: 2,025
Trader Rating: 13 (100%+)
Send a message via ICQ to valk Send a message via AIM to valk Send a message via MSN to valk
Default

Happy to be getting the parts, though too bad you killed the case. I would have jbwelded the thing ad started it up lol
valk is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 08:14 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net