R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 12-21-2006, 11:04 PM   #1411
Tech Apprentice
 
caggers's Avatar
 
Join Date: Apr 2005
Location: Sydney
Posts: 92
Default

.
caggers is offline   Reply With Quote
Old 12-22-2006, 12:52 AM   #1412
Tech Apprentice
 
caggers's Avatar
 
Join Date: Apr 2005
Location: Sydney
Posts: 92
Default

Fixed
caggers is offline   Reply With Quote
Old 12-27-2006, 12:09 AM   #1413
Tech Master
 
Ivan Dickson's Avatar
 
Join Date: Jan 2005
Location: Cali Love USA
Posts: 1,643
Trader Rating: 12 (93%+)
Cool My tz was stored up for 7 mos no racing do to work schedule

Just started up my TZ after 7 months of not racing temps stay under 200F when idol very impress motor sounds great can't wait to race it.
__________________
SPECIAL THANKS TO ✦ MY WIFE ✦✦ MOTIV RC ✦✦ GRAVITY RC ✦✦ JGO PAINTZ ✦✦ TQ RC RACEWAY ✦✦ TAMIYA RACEWAY ✦
Ivan Dickson is offline   Reply With Quote
Old 01-03-2007, 08:27 PM   #1414
Tech Elite
 
rcabj's Avatar
 
Join Date: Feb 2004
Location: johor, west malaysia
Posts: 4,682
Trader Rating: 1 (100%+)
Default

hello... my TZ3 has just been through its 2nd race last weekend and i was satisfied with the performance running againts novas,TZ5,Sirio's S....

anyway after the race i decided its time to dissamble it for inspection on the parts..

1. the top of the piston has black spots, compression still very strong...
2. the internal bearing brown colour, no excessive play and no need to replace i think
3. the cshaft internal and sides were very brown/rusted i think
4. the conrod has quite a freeplay againts the cshaft pin, so new conrod coming...

btw i have replace the conrod...but there is still freeplay againts the cshaft pin ( so should there be no play or a little or what...) or the c/shaft pin has worn out also

BTW my engine has gone through 3- 4 litrs of fuel (25% nitro, P6 glow plug, and 0.4mm head clearance)

like to hear some comments on this conditions...thank u..
__________________
BLacK cRoW RaCiNg TeaM
JBRCC
TEAM ORANGE
RCCUTM
pemandu upahan ;)
rcabj is offline   Reply With Quote
Old 01-03-2007, 08:56 PM   #1415
Tech Adept
 
Nosram's Avatar
 
Join Date: Nov 2005
Location: Spring, Texas, USA
Posts: 143
Default rcabj

Take a look at post #1367 on November 19th last year. Not only was my big end to crank pin fit very bad, but also the top of the piston was badly pitted!
I returned the motor to Tower and they replaced it, no question.
I haven't run the motor yet, as I got a Nova Rossi in the interim period
Nosram is offline   Reply With Quote
Old 01-03-2007, 08:58 PM   #1416
Tech Regular
 
Bigbarn's Avatar
 
Join Date: Feb 2003
Posts: 317
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Nosram
Take a look at post #1367 on November 19th last year. Not only was my big end to crank pin fit very bad, but also the top of the piston was badly pitted!
I returned the motor to Tower and they replaced it, no question.
I haven't run the motor yet, as I got a Nova Rossi in the interim period

Nosram it's good to hear Tower was so nice about that problem. Those were your pics back a while ago huh? That was a messed up engine.
Bigbarn is offline   Reply With Quote
Old 01-04-2007, 12:20 AM   #1417
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default front bearing worn ? ?

hey guys
i think my front bearing is worn, the one under the carb.

after every race i notice alot of oily gunk stuck on the carb above the flywheel. the engine runs fast and stroing and the temps are consistent.

could it be the front bearing or maybe still a rich tune? what size is this bearing?
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 01-04-2007, 12:44 AM   #1418
Tech Master
 
Nitro$junkie's Avatar
 
Join Date: Jun 2006
Location: Gold Coast, Australia
Posts: 1,420
Trader Rating: 7 (100%+)
Send a message via MSN to Nitro$junkie
Default

These are the prices from http://www.pro-s-futaba.co.jp/ they a crazy cheap at these prices i orded two of each

21535000 conrod 1980yen = $16 USD
21533000 piston and sleeve 4500yen = $38 USD

__________________
Futaba
Mugen
Novarossi
Byron's
http://www.hospitalrecords.com
Nitro$junkie is offline   Reply With Quote
Old 01-04-2007, 02:25 AM   #1419
Tech Master
 
Z00M's Avatar
 
Join Date: Jun 2004
Location: Perth, Western Australia
Posts: 1,173
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by mrgsr
hey guys
i think my front bearing is worn, the one under the carb.

after every race i notice alot of oily gunk stuck on the carb above the flywheel. the engine runs fast and stroing and the temps are consistent.

could it be the front bearing or maybe still a rich tune? what size is this bearing?
Don't panic mrgsr - it's just the engine trying to tell you that it's running rich on the LSN. You would be able to lean the LSN a little and you may need to richen the HSN to keep the temps in check once you get the LSN right.

It only needs to be a little bit rich to force some oil out through the front bearing as it is lubricating it. Once this hits the flywheel it goes on the carb and anything else that is in the way of this radial arc.

Cheers,

Mike.
__________________
My blog: http://mikesrc.wordpress.com
XRAY XB4
## NOSRAM ## XRAY ## KO ##
www.nbhc.com.au - www.teamxray.com
Z00M is offline   Reply With Quote
Old 01-04-2007, 10:00 AM   #1420
Tech Elite
 
Join Date: Nov 2003
Location: Harwood, MD
Posts: 2,526
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by rcabj
hello... my TZ3 has just been through its 2nd race last weekend and i was satisfied with the performance running againts novas,TZ5,Sirio's S....

anyway after the race i decided its time to dissamble it for inspection on the parts..

1. the top of the piston has black spots, compression still very strong...
2. the internal bearing brown colour, no excessive play and no need to replace i think
3. the cshaft internal and sides were very brown/rusted i think
4. the conrod has quite a freeplay againts the cshaft pin, so new conrod coming...

btw i have replace the conrod...but there is still freeplay againts the cshaft pin ( so should there be no play or a little or what...) or the c/shaft pin has worn out also

BTW my engine has gone through 3- 4 litrs of fuel (25% nitro, P6 glow plug, and 0.4mm head clearance)

like to hear some comments on this conditions...thank u..
I think that it would be time for a new rod but not the crank. You should get another 3-4 L out of it. Are you putting after run oil in after each race day?
THE DOCTOR is offline   Reply With Quote
Old 01-04-2007, 01:58 PM   #1421
Tech Addict
 
Join Date: Nov 2004
Location: KISSIMMEE,FLORIDA
Posts: 700
Trader Rating: 2 (100%+)
Default

what fuel you running? i think the oil in it is whats giving you that color inside the motor.i run byrons,and after 2-3 gallons my motor is nice and clean inside.
__________________
Ahhh the smell of nitro in the morning!
Brooklyn Hobbies Team Driver
[url]www.brooklynhobbies.com[/url]
Team Trinity
[url]www.teamtrinity.com[/url]
Gary Figueroa
GFIGUEROA is offline   Reply With Quote
Old 01-04-2007, 04:57 PM   #1422
Tech Fanatic
 
Seisick's Avatar
 
Join Date: May 2004
Posts: 845
Default

IS THERE IS SOMETHING ABOUT THE OS ENGINE THAT COULD BE IMPROVED,
BEARINGS, THAT'S IT THEY DON'T LAST LIKE NOVA'S, LUCKILY I HAVE ACCESS TO NTN OR SIMILAR BEARINGS WITHOUT ANY PROBLEM, FOR 1/3 THE COST OF ORIGINALS IN THE US
__________________
HobbymaniA
GoT MuGeN?
Seisick is offline   Reply With Quote
Old 01-04-2007, 05:01 PM   #1423
Tech Regular
 
Bigbarn's Avatar
 
Join Date: Feb 2003
Posts: 317
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Seisick
IS THERE IS SOMETHING ABOUT THE OS ENGINE THAT COULD BE IMPROVED,
BEARINGS, THAT'S IT THEY DON'T LAST LIKE NOVA'S, LUCKILY I HAVE ACCESS TO NTN OR SIMILAR BEARINGS WITHOUT ANY PROBLEM, FOR 1/3 THE COST OF ORIGINALS IN THE US
What is NTN?
Bigbarn is offline   Reply With Quote
Old 01-04-2007, 07:32 PM   #1424
Tech Elite
 
Join Date: Nov 2003
Location: Harwood, MD
Posts: 2,526
Trader Rating: 15 (100%+)
Default

NTN is a brand name bearing manufacturer.
THE DOCTOR is offline   Reply With Quote
Old 01-04-2007, 07:37 PM   #1425
Tech Elite
 
Join Date: Nov 2003
Location: Harwood, MD
Posts: 2,526
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by Seisick
IS THERE IS SOMETHING ABOUT THE OS ENGINE THAT COULD BE IMPROVED,
BEARINGS, THAT'S IT THEY DON'T LAST LIKE NOVA'S, LUCKILY I HAVE ACCESS TO NTN OR SIMILAR BEARINGS WITHOUT ANY PROBLEM, FOR 1/3 THE COST OF ORIGINALS IN THE US
I agree, I think that I go through two sets of bearings to a P/S and rod set. What are the part numbers that you are using as replacement bearings? Can you get them at McMaster Carr?
THE DOCTOR 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 02:13 PM.


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