Like Tree13Likes

Murnan Modified Motors

Old 12-29-2006, 08:20 AM
  #1036  
Tech Adept
 
ProE's Avatar
 
Join Date: Dec 2005
Location: England
Posts: 236
Default

Thanks AFM,

I will only be using 16% nitro in this motor.

If I look at the info you provided, the only plugs that I should use are the C5TGC, C6TGC, C5TGF, C6TGCF.

I understand the concept of the C for hot and F for cold in the post. The only area that is still unclear to me, is the temperature section. Our temperatures almost never goes below 15deg C on race days. (mostly 20-40)

If I look at the temperatures for the plugs, I should be using the number 7 and 8 plugs, but they are all for the 20-30 and 30-up nitro engines.

Should I look at the nitro percentage or the temperature as a deciding factor.

Here is our current weather info:
Temp: 28 DEG C
Humidity: 50%
Altidude: 1333m above sea level
ProE is offline  
Old 12-29-2006, 05:36 PM
  #1037  
afm
Tech Master
 
afm's Avatar
 
Join Date: Nov 2003
Location: lima-peru
Posts: 1,811
Default

Originally Posted by ProE
Thanks AFM,

I will only be using 16% nitro in this motor.

If I look at the info you provided, the only plugs that I should use are the C5TGC, C6TGC, C5TGF, C6TGCF.

I understand the concept of the C for hot and F for cold in the post. The only area that is still unclear to me, is the temperature section. Our temperatures almost never goes below 15deg C on race days. (mostly 20-40)

If I look at the temperatures for the plugs, I should be using the number 7 and 8 plugs, but they are all for the 20-30 and 30-up nitro engines.

Should I look at the nitro percentage or the temperature as a deciding factor.

Here is our current weather info:
Temp: 28 DEG C
Humidity: 50%
Altidude: 1333m above sea level
Yes, go by the nitro %.
Regarding your altitude: Normally all Nova engines come with 0.40mm shims (0.30 + 0.10), which is good for up to 30% nitro at sea level. When using 16 to 20% nitro we use only the 0.30mm shim at sea level, but your altitude is on the limit of changing to only 0.20mm shim using 16% nitro. You'll have to test and see whta works best.

AFM
afm is offline  
Old 12-31-2006, 07:26 PM
  #1038  
Tech Addict
iTrader: (13)
 
movingparts's Avatar
 
Join Date: Dec 2005
Location: Makati
Posts: 543
Trader Rating: 13 (100%+)
Default

Thanks Grinder!

Your engine still runs smoothly..this is only for future reference
I should take care of my crank though
movingparts is offline  
Old 01-05-2007, 06:27 PM
  #1039  
Tech Master
Thread Starter
iTrader: (2)
 
Grinder's Avatar
 
Join Date: Feb 2003
Posts: 1,864
Trader Rating: 2 (100%+)
Default

Originally Posted by movingparts
Thanks Grinder!

Your engine still runs smoothly..this is only for future reference
I should take care of my crank though
Grinder is offline  
Old 01-05-2007, 06:28 PM
  #1040  
Tech Master
Thread Starter
iTrader: (2)
 
Grinder's Avatar
 
Join Date: Feb 2003
Posts: 1,864
Trader Rating: 2 (100%+)
Default

[QUOTE=afm]
Originally Posted by ProE
.....................

What is the recommended plug to use for the 12-3CT at high altitude with low humidity? Average temperature through out the year is between 20-40 deg Celsius. (Please advise on plug to use at sea level with high humidity as well)..........................

QUOTE]

The numbers and characters on the plugs, are the product number, wire thickness, and thermal range of the plug’s body. Example: The Novarossi C6TG (F) or (C)
Product: C (Conical)
Wire Thickness: 6
Plug Type: T (Turbo)
Plated: G (Gold)
Thermal Range: F (Fredda = Cold) C (Calda = Hot)

The plugs with cold thermal range F (Fredda), have a body with thinner walls and shorter body, so they dissipate heat better and faster to the engine head. The plugs with hot thermal range C (Calda), have a body with thicker walls and longer body, so they dissipate heat better and faster to the engine head. The number of threads is the same on both types of plugs.

How to select the proper plug:
·When the ambient temperature is high, we have to use a plug with thicker wire.
·With higher compression, we have to use a plug with thicker wire.
·Humidity determines if we use a Cold (F) thermal range, or Hot (C) thermal range.
·With high humidity percentage we should use a Hot (C) thermal range plug.
·If we have high temperature and high humidity, we should use a plug with thick wire and a Hot(C) thermal range.

The best instrument to determine which Turbo Plug to use, is those table digital weather stations, that have Temperature, Humidity, and some also Barometric Pressure on them. That is the key to success or failure tuning engines with Turbo Glow Plugs, because they are so sensitive to weather variations that is unbelievable.

Following is a selection chart for Novarossi Turbo Glow Plugs

Type Thermal Range Nitro% Air Temp.C° Humidity%
C5TGC Hot/hot wire 10-20 0-10 70-100
C6TGC Hot/average wire 10-20 10-16 70-100
C7TGC Hot/cold wire 20-30 16-25 70-100
C8TGC Hot/ultra cold wire 30-up 25-up 70-100
C5TGF Cold/hot wire 10-20 0-10 40-70
C6TGF Cold/average wire 10-20 10-15 40-70
C7TGF Cold/cold wire 20-30 16-25 40-70
C8TGF Cold/ultra cold wire30-up 25-up 40-70

For Altitude you have to adjust your compresion ratio (higher) reducing shims on chamber, and/or use higher nitro % fuel. Depends on how high you are. Plugs will be the same as per chart.

AFM
Thanks AFM.
Grinder is offline  
Old 01-05-2007, 06:30 PM
  #1041  
Tech Master
Thread Starter
iTrader: (2)
 
Grinder's Avatar
 
Join Date: Feb 2003
Posts: 1,864
Trader Rating: 2 (100%+)
Default

Novarossi +12-3SCT engines are back in stock. Stock and modified.
Grinder is offline  
Old 01-05-2007, 06:34 PM
  #1042  
afm
Tech Master
 
afm's Avatar
 
Join Date: Nov 2003
Location: lima-peru
Posts: 1,811
Default

You are welcome Uriah.....By the way, did you test the JL 12 Red Dot??
what are your impressions.

AFM
afm is offline  
Old 01-05-2007, 06:58 PM
  #1043  
Tech Master
Thread Starter
iTrader: (2)
 
Grinder's Avatar
 
Join Date: Feb 2003
Posts: 1,864
Trader Rating: 2 (100%+)
Default

Originally Posted by afm
You are welcome Uriah.....By the way, did you test the JL 12 Red Dot??
what are your impressions.

AFM
Unfortunately it has rained here for the last 3 Sundays. Probably going to rain again this Sunday.
I will break the engine in tomorrow, if it does not rain the engine will be tested stock this weekend.
I can't wait.
Grinder is offline  
Old 01-05-2007, 07:01 PM
  #1044  
Tech Master
iTrader: (7)
 
Nitro$junkie's Avatar
 
Join Date: Jun 2006
Location: Gold Coast, Australia
Posts: 1,420
Trader Rating: 7 (100%+)
Default

how much difference is there between your moded 3CT to a moded 3SCT power wise
Nitro$junkie is offline  
Old 01-05-2007, 07:15 PM
  #1045  
Tech Elite
 
British Menace's Avatar
 
Join Date: Sep 2005
Location: Davenport, IA
Posts: 2,529
Default Great Thread !!!

Hey People....

Just to say thanks. It's enjoyable to be able to read a thread with such quality information from so many knowledgable people.

It all adds to the enjoyment and excitement of the hobby.
Great thread guys. All credit to you all.

Menace.
British Menace is offline  
Old 01-05-2007, 10:44 PM
  #1046  
Tech Adept
 
nitro_moe's Avatar
 
Join Date: Oct 2006
Posts: 109
Default

Say Grinder,, If you don't mind me asking, is there a special method you preffer to use to breaking- in your engines or you like to stick with the orthodox break-in procedure?

Ever considered the Wide Open Throttle break-in method (aka Josh Cyrul method)..??
nitro_moe is offline  
Old 01-06-2007, 10:00 AM
  #1047  
Tech Elite
 
British Menace's Avatar
 
Join Date: Sep 2005
Location: Davenport, IA
Posts: 2,529
Default Mega ZX .12

Hi Grinder.

I would like to ask if you have done much work on these Mega ZX .12 motors?
Is there much to be gained without losing or risking too much on reliability? I'm talking now of the legal 3 port motor.

I would not ask for specific info' just an idea to see if it's worth doing any or much mod work myself.

I will have one of these motors as a practice/ backup motor. Any info' would be greatly appreciated.

Thankyou.

Menace
British Menace is offline  
Old 01-06-2007, 08:15 PM
  #1048  
Tech Elite
iTrader: (2)
 
doki_doki's Avatar
 
Join Date: Dec 2003
Location: Cebu City, Philippines and Ocala, Florida, USA
Posts: 3,840
Trader Rating: 2 (100%+)
Default

Grinder: I have finished breaking in and tuning my Nova 12+3SCT Found out that the 7fins manifold work best in out local tracks Was wondering if you could give any tips on how to maintain ceramic bearings and how often would I check or change this bearing as as compared to the regular metal bearings? I would really appreciate your help. Thanks
doki_doki is offline  
Old 01-09-2007, 01:44 PM
  #1049  
Tech Master
Thread Starter
iTrader: (2)
 
Grinder's Avatar
 
Join Date: Feb 2003
Posts: 1,864
Trader Rating: 2 (100%+)
Default

Originally Posted by Nitro$junkie
how much difference is there between your moded 3CT to a moded 3SCT power wise
Not much, if any. The +12-3CT is no more. Novarossi is only making the SCT now.
Grinder is offline  
Old 01-09-2007, 01:45 PM
  #1050  
Tech Master
Thread Starter
iTrader: (2)
 
Grinder's Avatar
 
Join Date: Feb 2003
Posts: 1,864
Trader Rating: 2 (100%+)
Default

Originally Posted by British Menace
Hey People....

Just to say thanks. It's enjoyable to be able to read a thread with such quality information from so many knowledgable people.

It all adds to the enjoyment and excitement of the hobby.
Great thread guys. All credit to you all.

Menace.
Thanks for the kind words.
Grinder is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Your Privacy Choices -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.