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 06-13-2011, 05:35 AM   #241
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,278
Send a message via ICQ to Roelof
Default

I do not have one, I worked on 2 on the track, no papers seen....
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 06-13-2011, 07:55 AM   #242
Tech Addict
 
Join Date: Mar 2007
Posts: 559
Trader Rating: 11 (100%+)
Default

Ran my Murnan picco this weekend at our club race, Had soom great drivers there.
Ted hammer
Terry Rott
Rick Davis
Lon burling.

I qualified 2nd and took the win in the Main after a great battle with Ted Hammer.

First weekend on the motor, need to dial it in a little more but it was running great.
__________________
Desoto Racing, Serpent America, Novarossi, KoPropo, Xceed.
2011, 2013, 2 Time Midwest Series 1/8th Open, Champion
2011 Byrons onroad 1/8th Open 3rd
2011 Roar Nats 1/8th Open, 5th
2012 GLC 1/8th Open Q7 Finish 5th, 2013 GLC 1/8th Open Q4 Finish 7th
Vector03cobra is offline   Reply With Quote
Old 06-13-2011, 08:24 AM   #243
Tech Champion
 
GMartinez's Avatar
 
Join Date: Dec 2004
Location: Sunshine State
Posts: 8,162
Trader Rating: 85 (100%+)
Default

Ralph I have worked on 5 engines 4 for customers to break in 1 for myself
Each engine came measured .45 to .5 measured with calipers we all know when measuring with calipers each time u measure it will not give u the same reading
I add a .1 to get it close to 6 for breakin and leave it in
I run 1,500cc thru it before it hit's the track
When I'm in a rush I run 800 cc but felt afterwards it still was not fully broken in they were all torque edo modified using kosmic 25p and also used 16p with the same shimming
I believe what u have is the torque std modified by murnan
You can also call me if needed if u don't have my number lmk I will send it to u
I have also tested different pipe header combo's
__________________
www.fullthrottlercraceway.com
Home of The U.S. World Nitro Cup 2013,2014,2015,2016
2014 Roar Electric Nationals, IFMAR ISTC Worlds, 2015 Roar Fuel Nationals
2017 U.S.World Nitro Cup Nov 29th - Dec 3rd
U.S.Open Fuel Championship Returning soon
GMartinez is offline   Reply With Quote
Old 06-13-2011, 08:38 AM   #244
kmh
Tech Addict
 
Join Date: Jun 2006
Posts: 529
Default

Questions were asked before about this issue. Check post #166,#168,#172.
I posted what the exploded view paperwork says, but I did not measure the actual clearance.(Torque EDO MOD .21) Thanks for all the new info guys.
kmh is offline   Reply With Quote
Old 06-13-2011, 10:23 AM   #245
Tech Regular
 
Join Date: Apr 2005
Posts: 314
Default

Guys, can you go too low with the head clearance? Is 0.4mm better then 0.5 and what is happening when you go too low? I know, without any clearance, the piston will probably hit the combustion chamber...
fulcrum2 is offline   Reply With Quote
Old 06-13-2011, 11:36 AM   #246
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,278
Send a message via ICQ to Roelof
Default

A smaller clearance with the same nitro content will give more bottom torque but could blow plugs and give a pre-detonation (the piston and chamber will look like it is sandblasted). If you are on to it you will loose top rpm.

0.4 for itself must be possible because you have to take out 0.1mm when running om 10 to 16% nitro.
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 06-13-2011, 01:09 PM   #247
Tech Champion
 
GMartinez's Avatar
 
Join Date: Dec 2004
Location: Sunshine State
Posts: 8,162
Trader Rating: 85 (100%+)
Default

You also have to consider different altitudes & air density
I know drivers in different states there is always a change of tune state to state or country
__________________
www.fullthrottlercraceway.com
Home of The U.S. World Nitro Cup 2013,2014,2015,2016
2014 Roar Electric Nationals, IFMAR ISTC Worlds, 2015 Roar Fuel Nationals
2017 U.S.World Nitro Cup Nov 29th - Dec 3rd
U.S.Open Fuel Championship Returning soon
GMartinez is offline   Reply With Quote
Old 06-13-2011, 06:52 PM   #248
Tech Master
 
Grinder's Avatar
R/C Tech Elite Subscriber
 
Join Date: Feb 2003
Posts: 1,857
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by KevcoRacing View Post
Ralph, I was told by Alberto a month ago that engines come with .4mm-.5mm shims. Total head clearance may vary from engine to engine but close. Not sure why manual says .3mm, but I will ask tomorrow.
I would reccommend putting .6 shims for break/run in. I heard Uriah modified your motor?

When I measure actual head clearance with solder, I get the following.

.3mm of shims = .48mm actual clearance
.4mm of shims = .58mm actual clearance
.5mm of shims = .68mm actual clearance

I think the engines run fine with around .58 mm of actual clearance. That is around .023 inches. That is about .4mm of shims. Each engine is slightly different, but that will get you in the ballpark.

You can run the engine with lower clearance, but it is easier to blow plugs. I ran a clearance of .026 inches in Miami with great results. I tried to run the clearance lower than that, and the plugs were not happy there. Partly due to the altitude being at sea level. When I tested at home I could run lower, and the plugs were still happy. At home elevation is 1000 ft above sea level.

To be safe, it is a good idea to add .2mm of shims to the engine for break in, and initial tuning. Then start dropping the head .1mm at a time if you feel the need for more bottom end grunt.
__________________
www.murnanmodified.com
Grinder is offline   Reply With Quote
Old 06-14-2011, 12:49 AM   #249
Tech Regular
 
Join Date: Apr 2005
Posts: 314
Default

Uriah,

you said you were blowing plugs with that very low head clearance. Did they drop their elements, or just stopped to glow?

Thanks, Stefan
fulcrum2 is offline   Reply With Quote
Old 06-14-2011, 10:56 AM   #250
Tech Elite
 
TommyBlazin's Avatar
 
Join Date: Feb 2009
Location: jersey
Posts: 2,580
Trader Rating: 29 (100%+)
Default

Quote:
Originally Posted by GMartinez View Post
Ralph I have worked on 5 engines 4 for customers to break in 1 for myself
Each engine came measured .45 to .5 measured with calipers we all know when measuring with calipers each time u measure it will not give u the same reading
I add a .1 to get it close to 6 for breakin and leave it in
I run 1,500cc thru it before it hit's the track
When I'm in a rush I run 800 cc but felt afterwards it still was not fully broken in they were all torque edo modified using kosmic 25p and also used 16p with the same shimming
I believe what u have is the torque std modified by murnan
You can also call me if needed if u don't have my number lmk I will send it to u
I have also tested different pipe header combo's

there is a torque standard, and modded version?
__________________
Thinking on maybe a Tekno 1/8 Nitro Buggy?
TommyBlazin is offline   Reply With Quote
Old 06-14-2011, 11:14 AM   #251
Tech Elite
 
stefan's Avatar
 
Join Date: Aug 2001
Location: Bavaria, Germany
Posts: 3,273
Send a message via AIM to stefan
Default

PIC9200: PICCO TORQUE TURBO ONROAD

PIC9230:PICCO TORQUE EDO MODIFIED TURBO ONROAD

PIC9261: PICCO NITRO PACK TORQUE EDO FACTORY TUNED TURBO
stefan is offline   Reply With Quote
Old 06-14-2011, 02:57 PM   #252
Tech Master
 
Grinder's Avatar
R/C Tech Elite Subscriber
 
Join Date: Feb 2003
Posts: 1,857
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by fulcrum2 View Post
Uriah,

you said you were blowing plugs with that very low head clearance. Did they drop their elements, or just stopped to glow?

Thanks, Stefan
Some of the plugs just quit working, and I blew some of them to smitherines. Not one of the blown plugs scratched the side of the piston.

In testing the engines limits, I detonated the top of the piston/button. The sides of the piston still looked perfect. The same engine is still running extremely strong 4 gallons later. The engines are very durable.
__________________
www.murnanmodified.com
Grinder is offline   Reply With Quote
Old 06-14-2011, 06:02 PM   #253
Tech Apprentice
 
Join Date: May 2011
Posts: 88
Default .12 Arrival's

The wait is over!
.12 standard and EDO mod should arrive (27th) one week from this coming Monday! Email me and reserve yours. [email protected]
KevcoRacing is offline   Reply With Quote
Old 06-18-2011, 06:48 AM   #254
Tech Adept
 
nitro_fanatic's Avatar
 
Join Date: Aug 2008
Posts: 152
Trader Rating: 3 (100%+)
Default

Hi, does anyone knows whether os turbo glow plugs could be
used on the .21 picco torque edo modified engine?

Thanks in advance..
nitro_fanatic is offline   Reply With Quote
Old 06-18-2011, 07:41 AM   #255
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,861
Trader Rating: 24 (100%+)
Default

Quote:
Originally Posted by nitro_fanatic View Post
Hi, does anyone knows whether os turbo glow plugs could be
used on the .21 picco torque edo modified engine?

Thanks in advance..
They probably would work but I wouldn't advise it. OS taper seems to be just a bit different from everything else. Some motors they will leak, some they wont. Picco plugs are excellent, stick with them if you can. Also LM plugs (Sirio, Werks, Orion, etc.) work great.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer 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 09:42 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