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 07-13-2004, 05:25 AM   #856
Tech Fanatic
 
kitracer's Avatar
 
Join Date: Sep 2001
Location: hong kong
Posts: 986
Default

Quote:
Originally posted by boner
kitracer: I believe I tried leaning the low end to as low as 1 turn from close and show signs of too lean. Well I hope i'll find time today to do more fine tuning on this engine.
boner,
May be too lean on HSN. Try starting from 1 1/2 turn LSN, 4 1/2 turn on HSN.
If anytime your plug coated with fuel, meaning too rich.

Tell us more when u run the engine again. Good luck
kitracer is offline   Reply With Quote
Old 07-13-2004, 04:55 PM   #857
Tech Adept
 
Join Date: Sep 2002
Location: Austin, TX
Posts: 246
Trader Rating: 2 (100%+)
Default

Boner, how many shims are under the button? Or maybe measure them together. It almost sounds like you're overshimmed. Too much fuel in the combustion chamber. Btw, when I used a MT12 carb, i was running the LSN a little over 1 turn out.
Surge is offline   Reply With Quote
Old 07-13-2004, 07:19 PM   #858
Tech Regular
 
boner's Avatar
 
Join Date: Oct 2001
Posts: 343
Trader Rating: 3 (100%+)
Default

Just got back from tuning. Surge you are right about shiming, 1 shim makes a lot of different. If I'm in Cali, I'm sure TG777 will kick me in the butt for not listening to him. Somehow the engine doesn't seem to have the acceleration used to have and it like to peak 280F no matter how rich I set on HSN (tried 5 1/2 turn out). Maybe it's because I'm running on a open parking lot + warmer plug. Going to do more tuning tomorrow after I pick up a new fuel bottle, don't you just hated when things are start to working well and fuel bottle decide to tear apart?
boner is offline   Reply With Quote
Old 07-27-2004, 11:06 AM   #859
Tech Adept
 
Join Date: Dec 2001
Posts: 191
Default Settings

Hi Guys,

With the experience so far with the PS12 give me your base settings.

I've got a carb from an MT12
Running 3 shims
3 1/2 top
2 bottom

Novarossi No. 6 plug

I can start the engine no problem, it will run steady as long as I keep the glow starter on the plug, when I take it off it dies in 10 secs. It sounds like it is loading up.

I attempted leaning out the bottom end & top but felt I could start doing some harm so I stoped.

I did try a No. 7 plug but it seemed worse.

So what to do . . . . . . .


Thanks in advance
click, dublin is offline   Reply With Quote
Old 07-27-2004, 11:24 AM   #860
Tech Elite
 
Join Date: Aug 2001
Location: Valencia, CA
Posts: 2,897
Send a message via Yahoo to TambokGT
Default body for 950R

Edward,
Did Leo like the 1/8 body I painted for him?
TambokGT is offline   Reply With Quote
Old 07-27-2004, 12:04 PM   #861
Tech Elite
 
EdwardN's Avatar
 
Join Date: May 2003
Location: SoCal
Posts: 2,144
Trader Rating: 1 (100%+)
Default Re: Settings

Quote:
Originally posted by click, dublin
Hi Guys,

With the experience so far with the PS12 give me your base settings.

I've got a carb from an MT12
Running 3 shims
3 1/2 top
2 bottom

Novarossi No. 6 plug

I can start the engine no problem, it will run steady as long as I keep the glow starter on the plug, when I take it off it dies in 10 secs. It sounds like it is loading up.

I attempted leaning out the bottom end & top but felt I could start doing some harm so I stoped.

I did try a No. 7 plug but it seemed worse.

So what to do . . . . . . .


Thanks in advance
Hi Kevin.
It is too reach on the bottom, lean it to 1-1/4-1-1/2, will not harm.
__________________
DISCLAIMER: Since 90% of my posts may be BS, and since my posts may be either insanely idiotic, incoherent, and/or not even close to a rational thought, please accord my posts no more than 10% of credibility.
EdwardN is offline   Reply With Quote
Old 07-27-2004, 12:06 PM   #862
Tech Elite
 
EdwardN's Avatar
 
Join Date: May 2003
Location: SoCal
Posts: 2,144
Trader Rating: 1 (100%+)
Default Re: body for 950R

Quote:
Originally posted by TambokGT
Edward,
Did Leo like the 1/8 body I painted for him?
Hey, I was thinking you are already gone to San Jose.
Yes , he love it and I already made all holes. just wait for next practice.
Did you tune 21 BRB P/S set ?
See you at RAMS next Sunday
__________________
DISCLAIMER: Since 90% of my posts may be BS, and since my posts may be either insanely idiotic, incoherent, and/or not even close to a rational thought, please accord my posts no more than 10% of credibility.
EdwardN is offline   Reply With Quote
Old 07-27-2004, 12:10 PM   #863
Tech Regular
 
boner's Avatar
 
Join Date: Oct 2001
Posts: 343
Trader Rating: 3 (100%+)
Default

listen to TG777 he know his stuff. you low end is on rich side and use cold plug this engine like it a lot. my needle setting with mt12 carb:LSN 1 1/2 HSN: 4 1/3 run like a charm (180F)
boner is offline   Reply With Quote
Old 07-27-2004, 12:13 PM   #864
Tech Adept
 
Join Date: Dec 2001
Posts: 191
Default

Hi Guys,

Thanks for the replys.

Boner when you say run a colder plug do you mean a 7 instead of a 6 (Novarossi range)


Many Thanks
click, dublin is offline   Reply With Quote
Old 07-27-2004, 12:52 PM   #865
Tech Adept
 
Join Date: Dec 2001
Posts: 191
Default

Just ran the engine again with the new settings:


Bottom 1 1/2
Top 4 1/2

Tried a No. 6 & a No. 7 Novarossi plug


Engine will not idle without the glow starter on the plug.

It starts OK but when I take the glow starter off, it dies?

Idle is set high

Any suggestions?
click, dublin is offline   Reply With Quote
Old 07-27-2004, 12:59 PM   #866
Tech Elite
 
EdwardN's Avatar
 
Join Date: May 2003
Location: SoCal
Posts: 2,144
Trader Rating: 1 (100%+)
Default

Quote:
Originally posted by click, dublin
Just ran the engine again with the new settings:


Bottom 1 1/2
Top 4 1/2

Tried a No. 6 & a No. 7 Novarossi plug


Engine will not idle without the glow starter on the plug.

It starts OK but when I take the glow starter off, it dies?

Idle is set high

Any suggestions?
What is ambient temperature now?
Try hotter plug-in Europe if it is cold, #5 might work better on idle.
But still to reach on bottom. Go for 1-1/4
__________________
DISCLAIMER: Since 90% of my posts may be BS, and since my posts may be either insanely idiotic, incoherent, and/or not even close to a rational thought, please accord my posts no more than 10% of credibility.
EdwardN is offline   Reply With Quote
Old 07-27-2004, 01:26 PM   #867
Tech Adept
 
Join Date: Dec 2001
Posts: 191
Default

How many shims should there be?

I've got 3 shims & was told one was removed before I got the engine, is this correct? Should there be 4?

Temp 11c / 52f

I don't have any no. 5 plugs!! I've never needed them in the last 7 years running .12's.


The engine runs fine with the glow starter on it but now, with the new settings, it cuts out the second I remove it.

I'll try again with a leaner bottom end.
click, dublin is offline   Reply With Quote
Old 07-27-2004, 01:28 PM   #868
Tech Adept
 
Join Date: Dec 2001
Posts: 191
Default

Forgot to mention, I'm running 16% nitro, could this have anything to do with shims?


Thanks
click, dublin is offline   Reply With Quote
Old 07-27-2004, 02:02 PM   #869
Tech Adept
 
Join Date: Dec 2001
Posts: 191
Default

Changed bottom to 1 1/4.

Still no difference.

Will have to wait until I get some no.5's.


I find it hard to believe thats this is the problem, but I'll give it a try.
click, dublin is offline   Reply With Quote
Old 07-27-2004, 02:19 PM   #870
Tech Regular
 
boner's Avatar
 
Join Date: Oct 2001
Posts: 343
Trader Rating: 3 (100%+)
Default

you have to ask TG777 on head shim. By the way, did you check the temp of your engine when it flood/flame out? It's a pain to tune an engine when it's cold. I probably will put the ignitor on until engine reaches 45+C
boner is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Palmaris PR12 .12 1/10 touring car engine boy2rc R/C Items: For Sale/Trade 0 01-29-2007 09:28 AM
Palmaris Racing EdwardN Monster Trucks 0 11-26-2006 08:56 AM
Palmaris Racing EdwardN Electric Off-Road 0 11-26-2006 08:48 AM
Palmaris PS12 engine for sale boy2rc R/C Items: For Sale/Trade 0 08-10-2005 09:05 AM
Palmaris PS12 for sale boy2rc R/C Items: For Sale/Trade 2 03-16-2005 06:15 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 07:33 AM.


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