R/C Tech Forums

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

Like Tree1Likes
Reply
 
Thread Tools Search this Thread
Old 05-21-2010, 11:32 PM   #196
Tech Adept
 
TC3ElectricGuy's Avatar
 
Join Date: Sep 2005
Posts: 199
Trader Rating: 5 (100%+)
Default

the above preety much follows the Axe Rossi break in procedure that came with my engine.

i've just been following that.

after 2 1/2L it's starting to drop it's nuts as some people call it. however a consistant tune still isn't there.

the bottom bit i'll add to the above is running more than 1 tank of fuel through the engine on a run. as if you are getting the engine ready for a 20 or 30min final.
__________________
Team Losi 8ight 2.0
Axe Cobra X1 Evo .21 engine
Axe 2050 pipe
TC3ElectricGuy is offline   Reply With Quote
Old 05-28-2010, 03:37 PM   #197
Tech Addict
 
yuppi1's Avatar
 
Join Date: Oct 2009
Location: sunshine Coast
Posts: 661
Trader Rating: 13 (100%+)
Default

hey guys just a quick question. It is raining where i want to run in my engine and i need to get it done this weekend. If i cant drive it around like the guiude says can i just 1/2 throttle it on my box or will this still not work?

cheers
__________________
RC8T - Reedy 121 VR - Spektrum
MOOLOOLA VALLEY RACEWAY
yuppi1 is offline   Reply With Quote
Old 06-03-2010, 05:17 AM   #198
Tech Adept
 
TC3ElectricGuy's Avatar
 
Join Date: Sep 2005
Posts: 199
Trader Rating: 5 (100%+)
Default

guys/gals.

people have said before about when an engine breaks in it suddenly runs extremely rich....

is this on the top end or low end.

in the last couple of tanks running my engine in, i have found my LSN to be extremely rich. i have probably wound it in a good 12hrs and it can still go some more.
__________________
Team Losi 8ight 2.0
Axe Cobra X1 Evo .21 engine
Axe 2050 pipe
TC3ElectricGuy is offline   Reply With Quote
Old 06-03-2010, 05:39 AM   #199
Tech Master
 
Lille-bror's Avatar
 
Join Date: Jul 2009
Location: Frederikshavn, Denmark
Posts: 1,792
Default

Quote:
Originally Posted by yuppi1 View Post
hey guys just a quick question. It is raining where i want to run in my engine and i need to get it done this weekend. If i cant drive it around like the guiude says can i just 1/2 throttle it on my box or will this still not work?

cheers
Well.


No other had replied.

Anwser: No, you shouldn't run the engine with half throttle, without any load on the wheels. There must be something to slow the engine, and you will not have enough air to cool down the engine at that RPM range.

Cheers
__________________
www.xray-shop.dk www.northtq.com
Best regards Bjarne Petersson, Denmark
XRAY / FX Racing Engines / OS Speed / HPI / Byron / HUDY / Proline / Sanwa MT4s / Sav÷x servos / Ultimate
I miss you Amy...
Lille-bror is offline   Reply With Quote
Old 06-03-2010, 05:47 AM   #200
Tech Master
 
Lille-bror's Avatar
 
Join Date: Jul 2009
Location: Frederikshavn, Denmark
Posts: 1,792
Default

Quote:
Originally Posted by TC3ElectricGuy View Post
guys/gals.

people have said before about when an engine breaks in it suddenly runs extremely rich....

is this on the top end or low end.

in the last couple of tanks running my engine in, i have found my LSN to be extremely rich. i have probably wound it in a good 12hrs and it can still go some more.
That is both the top and buttom.

If you had run your engine just lean off 4 stroke on the HSN, you should hear it starts to 4 stroke down the straight, when its broken in.
Start leaning the HSN until she runs smooth down the straight. The HSN will also lean the bottom but not visa versa. If the LSN isn't right, now it is time to set that.

Good luck

I had to lean both HSN and LSN 1/4 of a turn on my NOSRAM, after she fattened herself up
__________________
www.xray-shop.dk www.northtq.com
Best regards Bjarne Petersson, Denmark
XRAY / FX Racing Engines / OS Speed / HPI / Byron / HUDY / Proline / Sanwa MT4s / Sav÷x servos / Ultimate
I miss you Amy...
Lille-bror is offline   Reply With Quote
Old 06-04-2010, 12:34 AM   #201
Tech Adept
 
TC3ElectricGuy's Avatar
 
Join Date: Sep 2005
Posts: 199
Trader Rating: 5 (100%+)
Default

she's purring down the straight and still finding power. i richened it out a fraction. 1/8th a turn on the HSN which resulted in the exhaust having an odd pop sound. so i leaned it out 1/8th. purrs now and is really starting to get that scream going.

so now that i have sorted the HSN, i have been focussing on the LSN. i haven't really touched the LSN much until recently, but like others have said, when it gets rich, it sure does get rich.

almost at race tune. i've got a practice session on the 12th and a race on the 13th. i'll race tune it on the 12th after a few of the experienced boys have had a look at it.
__________________
Team Losi 8ight 2.0
Axe Cobra X1 Evo .21 engine
Axe 2050 pipe
TC3ElectricGuy is offline   Reply With Quote
Old 06-19-2010, 11:34 PM   #202
Tech Fanatic
 
monkee's Avatar
 
Join Date: Apr 2010
Location: cda, idaho
Posts: 897
Trader Rating: 15 (100%+)
Default

so im going to use a heatgun to warm the engine prior to starting it.
what temp should i get the head to before starting?

the first 3-5 cycles, what % of throttle should i use? very very low?
or just watch the temps and keep it under 200?

when stopping it and putting it at bdc, how long aprox does it take to cool?

on the longer cycles, should i be getting the temps over 200?

and should i be heating the engine up with the heatgun prior to each start?


sorry for needing the walk thru. im afraid of ruining my engine
monkee is offline   Reply With Quote
Old 06-20-2010, 01:53 AM   #203
Tech Addict
 
yuppi1's Avatar
 
Join Date: Oct 2009
Location: sunshine Coast
Posts: 661
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by monkee View Post
so im going to use a heatgun to warm the engine prior to starting it.
what temp should i get the head to before starting?

the first 3-5 cycles, what % of throttle should i use? very very low?
or just watch the temps and keep it under 200?

when stopping it and putting it at bdc, how long aprox does it take to cool?

on the longer cycles, should i be getting the temps over 200?

and should i be heating the engine up with the heatgun prior to each start?


sorry for needing the walk thru. im afraid of ruining my engine

Dont be afraid, i was when i first did mine but i did 2 of my engines with this method but they are still going great guns and its easy. Use a heat gun everytime you are going to start the motor, there is not specific heat i just heated it until i could get the motor to turn over, i think thats the main reason for the heat gun. For the short cycles just use 1/4 to 1/2 throttle and then on the longer ones go to 3/4 but you just want to get it the correct temp. Just read the method a couple of times and dont be afraid
__________________
RC8T - Reedy 121 VR - Spektrum
MOOLOOLA VALLEY RACEWAY
yuppi1 is offline   Reply With Quote
Old 06-21-2010, 09:16 AM   #204
Tech Fanatic
 
monkee's Avatar
 
Join Date: Apr 2010
Location: cda, idaho
Posts: 897
Trader Rating: 15 (100%+)
Default

Posting this here. Because the 8ight thread probably wasn't the right place for it


Quote:
ok.. heat down the head. got it fired up..
im guessing that "pinch" is how tight the piston is when its not at bdc.
i have to use a small flathead to move the flywheel and i hear it suction loose.

anyhow.. tried to run first 3 min on the ground but i couldnt get the temps over 150.
so i put it back on the box and ran it there.. still no go.
so i turned the hsn out 1/2 hour. ran 3min at aprox 160-165
let it cool to 80degrees than fired it back up.
turned the hsn out another 1/2 and idled and light spurts at perhaps just under 1/4 throttle for 3min. got it to about 183
its now cooling.

its way dark outside so i think im done for the night but tomorrow ill try to finish it on the ground.

should i be at 200degrees each 'session' ?
if so, how do i get there? lean it out or run more throttle?

sorry if this should be in teh break in thread
monkee is offline   Reply With Quote
Old 06-21-2010, 11:55 AM   #205
Tech Adept
 
iznasty's Avatar
 
Join Date: Dec 2009
Location: Flushing Queens, NY
Posts: 176
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by monkee View Post
Posting this here. Because the 8ight thread probably wasn't the right place for it
If you have a way to preheat the engine to around 180-200 I'm sure that would help. I use a cheap hair dryer and it works fine for me.
__________________
Mugen MBX-6 w/ Alpha Z852
iznasty is offline   Reply With Quote
Old 06-21-2010, 02:57 PM   #206
Tech Fanatic
 
monkee's Avatar
 
Join Date: Apr 2010
Location: cda, idaho
Posts: 897
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by iznasty View Post
If you have a way to preheat the engine to around 180-200 I'm sure that would help. I use a cheap hair dryer and it works fine for me.
sorry... heating it to start isnt the question i have..
its this:





anyhow.. tried to run first 3 min on the ground but i couldnt get the temps over 150.
so i put it back on the box and ran it there.. still no go.
so i turned the hsn out 1/2 hour. ran 3min at aprox 160-165
let it cool to 80degrees than fired it back up.
turned the hsn out another 1/2 and idled and light spurts at perhaps just under 1/4 throttle for 3min. got it to about 183
its now cooling.

its way dark outside so i think im done for the night but tomorrow ill try to finish it on the ground.

should i be at 200degrees each 'session' ?
if so, how do i get there? lean it out or run more throttle?
monkee is offline   Reply With Quote
Old 06-21-2010, 03:39 PM   #207
Tech Master
 
Lille-bror's Avatar
 
Join Date: Jul 2009
Location: Frederikshavn, Denmark
Posts: 1,792
Default

Hi.

Put a sock or similar over the head. Lean the LSN until you have a rather stable idle. If that is not enough to keep the temp around 200 you shall lean the HSN.

Try following this post step by step:

http://www.rctech.net/forum/7438910-post195.html
__________________
www.xray-shop.dk www.northtq.com
Best regards Bjarne Petersson, Denmark
XRAY / FX Racing Engines / OS Speed / HPI / Byron / HUDY / Proline / Sanwa MT4s / Sav÷x servos / Ultimate
I miss you Amy...

Last edited by Lille-bror; 06-21-2010 at 04:04 PM.
Lille-bror is offline   Reply With Quote
Old 06-21-2010, 04:01 PM   #208
Tech Fanatic
 
monkee's Avatar
 
Join Date: Apr 2010
Location: cda, idaho
Posts: 897
Trader Rating: 15 (100%+)
Default

oh nice! thanks
monkee is offline   Reply With Quote
Old 06-21-2010, 04:05 PM   #209
Tech Master
 
Lille-bror's Avatar
 
Join Date: Jul 2009
Location: Frederikshavn, Denmark
Posts: 1,792
Default

Quote:
Originally Posted by monkee View Post
oh nice! thanks
__________________
www.xray-shop.dk www.northtq.com
Best regards Bjarne Petersson, Denmark
XRAY / FX Racing Engines / OS Speed / HPI / Byron / HUDY / Proline / Sanwa MT4s / Sav÷x servos / Ultimate
I miss you Amy...
Lille-bror is offline   Reply With Quote
Old 06-22-2010, 10:37 PM   #210
Tech Addict
 
Do-Over's Avatar
 
Join Date: Jun 2010
Location: O-H....I-O
Posts: 513
Default GEEZ

Guys,
This is Jamaican me crazy!!!
As most ppl who have seen me on the other threads know i just ordered an RC8T RS RTR.... Should be here today or tomorrow... I know this is a sport engine so i dont know if these methods apply but even if they did how would someone who has been outta RC for a decade know which to choose??? On the box, Off the box, let it idle, dont let it Idle, Half throttle, quarter throttle, 3 mins, 4 mins, 180*, 210*, etc. etc. etc. this whole thread seems like one big contradiction..... Or maybe im just a NOOBIE maybe they do all fit together im just not seeing it. But after many youtube vids. and reading the first few posts here i was confident, now I'm terrified....

Someone just smack me and say I promise this will work Broseph cuz my truggy comes tomorrow and i dont wanna be the idiot who broke his 1st engine... sorry im stressed....:bat man:

After re-reading it the first 3/4's of thread seem similar but there are a few discrepencies (know thats spelled wrong) still plz someone say use this specific one plz!
80-90 degree days mid summer very high humidity 85%+ if that helps

Last edited by Do-Over; 06-22-2010 at 11:05 PM.
Do-Over 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 09:59 PM.


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