R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-12-2009, 02:54 PM   #31
Tech Regular
 
tristyn's Avatar
 
Join Date: Dec 2008
Location: CRESCENT CITY CA. NORTHERN TIP OF CALIFORNIA
Posts: 396
Trader Rating: 4 (100%+)
Default run times

As far as nitro engines running a long period of time. I have ran my own engines 2-3 hrs at A time without even turning them off. I am currently running GRP engines and as long as your tune is close temps should stay consistence. I pretty much only run on tracks so it is a little different then running wide open down the street or across the field multiple times. On a track your off & on the throttle much more.
tristyn is offline   Reply With Quote
Old 07-12-2009, 03:53 PM   #32
Tech Regular
 
builtb16a's Avatar
 
Join Date: Jun 2009
Location: Redlands, CA
Posts: 295
Trader Rating: 1 (100%+)
Default

well.. the new piston and sleeve are in.

when i turned it over by hand, right after the rebuild, felt tight as normal.. once i started it up for the 1st time, and ran it for maybe 60 seconds.. it felt incredibly tight.

this morning i ran 1 tank through at idle. 160 degree's.

2nd tank at idle was closer to 170.

then.. i putted around the street.. maybe 1/4- 1/2 RPM the whole time.. got it to 180-190.

then put the wild tune on the 4th tank or so.

of course i waited in between tanks, and always let the motor cool down with pistons at the bottom.

its running good, and my HSN is right on point.. but i did notice just before i came in the last tank, i was getting the same sluggish bottom end, so it must be my LSN.

so im going to have to research that LSN tune technique.
builtb16a is offline   Reply With Quote
Old 07-12-2009, 04:07 PM   #33
Tech Adept
 
Join Date: Jan 2008
Posts: 194
Trader Rating: 2 (75%+)
Default

start it up an let it warm up for a bit an when its running temp pinch the fuel line around 3to4 inches away from the carb if it is tuned right on the bottow end it should take around 4 to 5 seconds for the engine to start to rev up like its running out of fuel
cjhorne is offline   Reply With Quote
Old 07-12-2009, 06:01 PM   #34
Tech Regular
 
builtb16a's Avatar
 
Join Date: Jun 2009
Location: Redlands, CA
Posts: 295
Trader Rating: 1 (100%+)
Default

will do.

now.. what kind of symptoms will i have if i had a engine leak? with heat.. the hotter the engine gets, metals expand. so i would think a leak that might be possible.. might go away with the expanded metal of a hot engine? right?
builtb16a is offline   Reply With Quote
Old 07-12-2009, 06:12 PM   #35
Tech Regular
 
builtb16a's Avatar
 
Join Date: Jun 2009
Location: Redlands, CA
Posts: 295
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by cjhorne View Post
start it up an let it warm up for a bit an when its running temp pinch the fuel line around 3to4 inches away from the carb if it is tuned right on the bottow end it should take around 4 to 5 seconds for the engine to start to rev up like its running out of fuel
if i pinch the line, and it instantly speeds up.. its lean?

i would think the longer the delay... more fuel present to run.. means its richer than i have it now.
builtb16a is offline   Reply With Quote
Old 07-13-2009, 08:55 AM   #36
Tech Adept
 
Join Date: Jan 2008
Posts: 194
Trader Rating: 2 (75%+)
Default

yes if it starts to rev up as soon as you pinch it its lean richen it up around a turn on the bottom and try that process again
cjhorne is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Houstons Engine Service H.E.S. houston Offroad Nitro Engine Forum 8821 06-17-2017 12:29 PM
"the tuning bible" houston Onroad Nitro Engine Zone 311 04-24-2017 11:18 PM
Please Help Muah! Speedjunkyz Nitro On-Road 36 09-05-2008 07:13 AM
Engine Tuning 101 (General Tuning) Kemorc Onroad Nitro Engine Zone 41 11-19-2007 06:04 PM



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 05:29 AM.


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