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 12-17-2005, 11:08 AM   #886
Tech Fanatic
 
Join Date: Nov 2003
Location: SoCal
Posts: 874
Default

Quote:
Originally Posted by mrgsr
hey guys
i had a pretty bad day with the os tz today

it would not at all hold its tune, and was so gutless the pull starts were keeping up with me.

i came home and stripped the engine to see whats going on, their doesnt seam to be any blow by on the piston but it is all scratched around the round edge.. i had one of the more experienced engine tuners at th track trying to keep it tuned but no luck...

the compression feels kinda tight but the flywheel is able to be turned around
it was running a bit on the leaner side so i guess there was no lubricating happening.. what should i do ? replace piston/sleeve ? engine has had about 2 gallons
If you see scratches on the piston, you're not cleaning your air filter... Dirt is what scratches the piston... It sounds to me that you've been running your motor to lean for to long and now your motors compression is gone... OS. has a 2 year warrenty on it's motors... They will correct any problems that's there's fault... End users that damage or miss use there products ie. over leaning a motor, continue to run the engine that is out of tune and not cleaning/changing to a fresh air filter are kinda on there own... Not trying to bash you... It just seems that you didn't take good care of $200.00 dollar investment. You can always give OS a call or email them... Good luck

RC_Alan
rc_alan is offline   Reply With Quote
Old 12-17-2005, 06:59 PM   #887
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default

that was a brand new and oiled air filter
i take great care of my engine always monitoring temps and glow plug condition

2 weekends ago it was one of the qucikest cars on the track and still running on the richer side. im pretty sure these tuning problems are coming from the small hole in the boittom of the pipe, i did have this hole kinda sealed however there was still heaps of oil residue around the hole
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 12-18-2005, 12:14 AM   #888
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default oil percentage ??

what oil blend do you guys recommend for this engine ?

currently i was using 16%nitro with 8% oil (4%syn 4%cast)

i was thinking of going up to a 10/12% oil based

Thanks
John
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 12-18-2005, 06:19 PM   #889
Tech Addict
 
Darth Vader's Avatar
 
Join Date: Dec 2004
Location: Coruscant
Posts: 658
Default

mgrsr,

If you have a clean air filter on and there is no debris in your engine, then don't worry about the scratches. I have some around my piston also.

Your problem could be due to the hole in your pipe. Affects your idling and tuning.
I also suffered a similar problem with my TZ a couple of months back. The inner bearing was worn and there was too much freeplay. Crank was rubbing the case. Leaned it quite a bit but engine was still sluggish. And it would cut off randomly on the track. There's also a rattling noise at idle. If you face these symptoms, maybe your inner bearing is gone too...
Darth Vader is offline   Reply With Quote
Old 12-22-2005, 02:11 PM   #890
Tech Master
 
gijoe64's Avatar
 
Join Date: Apr 2003
Location: Corona, Ca
Posts: 1,435
Trader Rating: 30 (100%+)
Default

Quote:
Originally Posted by Tabushi
Anyone can give me advice of a good pipe for the OS .12 TZ 3 port Turbo ? ... i was thinking about the OS 1040 but its comes up to US$ 104 !!

thanks in advance,

Pat
Try the Skyline pipe 80.00$
gijoe64 is offline   Reply With Quote
Old 12-22-2005, 10:41 PM   #891
Tech Addict
 
Join Date: May 2005
Posts: 727
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by gijoe64
Try the Skyline pipe 80.00$
I bought my 1040 (header + pipe) at rc-toro. I think with shipping it is only $95. I also had skyline vr12, but i like 1040 better. In general, it is better to use engine and pipe from the same company.
silverM3 is offline   Reply With Quote
Old 12-25-2005, 07:30 AM   #892
Tech Apprentice
 
caggers's Avatar
 
Join Date: Apr 2005
Location: Sydney
Posts: 92
Default

Could someone outline the best method for finding air leaks in engine/fuel line/tank. My TZ is running very hot even though its running under rich settings, i know there are many factors which would contribute to high running temps however I think an air leak is the most probable cause in this case.

I am using p6 plug with 15% nitro and 15% synthetic/castor mix.
caggers is offline   Reply With Quote
Old 12-25-2005, 09:31 PM   #893
Tech Addict
 
Join Date: Nov 2004
Location: KISSIMMEE,FLORIDA
Posts: 700
Trader Rating: 2 (100%+)
Default

FIRST OF ALL WHAT DO YOU CONSIDER HOT? TO CHECK YOUR FUEL SYSTEM FOR LEAKS TAKE OUT TANK AND FUEL TUBING PUT TANK UNDER WATER BUT KEEP VENT AND FEED SIDE ENDS OF TUBING OUT OF WATER SQUEZE CLOSED VENT END AND BLOW INTO OTHER IF YOU HAVE LEAK YOU WILL SEE BUBBLES COME OUT .AS FOR THE ENGINE IT IS MUCH EASIER TO JUST SEAL ENGINE I SEAL ALL MY MOTORS EVEN WHEN THEY ARE NEW.
__________________
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 12-25-2005, 10:00 PM   #894
Tech Addict
 
SpeedBump57's Avatar
 
Join Date: Aug 2005
Posts: 660
Default

Caggers a couple of things.

1. do what MANINTHEMUGEN has sugested. (man that is a long name

2. you might want to think about going to 20% as it will run a little cooler.

3. Some times running too rich will cause an engine to run too hot as well.

Bump
SpeedBump57 is offline   Reply With Quote
Old 12-25-2005, 10:49 PM   #895
Tech Fanatic
 
AndyT 's Avatar
 
Join Date: Sep 2004
Location: Sydney Australia
Posts: 862
Default

Another fast way to check for an air leak is to remove the air filter whilst the engine is idling and cover the air inlet with your finger.......if the engine doesnt die instantly theres an air leak somewhere.
AndyT  is offline   Reply With Quote
Old 12-26-2005, 04:40 AM   #896
Tech Apprentice
 
caggers's Avatar
 
Join Date: Apr 2005
Location: Sydney
Posts: 92
Default

Thanks for the help.
caggers is offline   Reply With Quote
Old 12-30-2005, 06:19 AM   #897
Tech Addict
 
Join Date: Aug 2002
Posts: 602
Trader Rating: 1 (100%+)
Default bearing

has anybody tried finding a ceramic rear case bearing for the os ? any luck?
isuzuguy is offline   Reply With Quote
Old 12-30-2005, 09:54 AM   #898
Tech Fanatic
 
Join Date: Nov 2003
Location: SoCal
Posts: 874
Default

Give this link a try... You should be able to find them and order them as well... http://www.bocabearings.com/main1.as...earchkit&cat=2

Front and rear bearings for about $75.00

RC_Alan
rc_alan is offline   Reply With Quote
Old 01-01-2006, 03:03 AM   #899
Tech Master
 
BrainTeased's Avatar
 
Join Date: Jan 2004
Location: Melbourne
Posts: 1,342
Trader Rating: 4 (100%+)
Default

Hi I was just wondering after how many Litres of fuel do you guys use after experiencing bearing leaks.

also did you guys use after run oil?

thanks in advance
__________________
www.feralbatteries.com.au
BrainTeased is offline   Reply With Quote
Old 01-01-2006, 07:02 AM   #900
Tech Master
 
onnetz's Avatar
 
Join Date: Apr 2004
Posts: 1,727
Default

Quote:
Originally Posted by BrainTeased
Hi I was just wondering after how many Litres of fuel do you guys use after experiencing bearing leaks.

also did you guys use after run oil?

thanks in advance
as opposed to not?
onnetz 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 05:14 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net