yea i'll put it up tonight

Just for you massive

Congratulations to Craig Murphy for coming second in the A Main Outboard , for the NSW Titles hosted by the Model Boat Club NSW .

Here is what Craig had to say.


" Just to follow up on the phone call today, thanks again for the great fuel got a good result on the weekend 2nd in A Outboard at the NSW State Titles hosted by the Model Boat Club of NSW. I don't think the boat has ever run as good and fuel economy was excellent !! "

Regads Craig Murphy

Craig ran an MM custom blend 50% nitro in his cool looking boat. here is a pic of the monster!

Cheers Craig glad you like the fuel !

Hey guys and gals !

MassiveMods HB 444 will be avalable from Ruben Vesozo at the LRRCC Lewis Memorial enduro !

Just go up to Rube or Joe Porfida and they will sort you out !

Cheers MM

MARK YOU ARE GETTING BETTER AND BETTER .AND THATS WHAT I LIKE TO SEE.

YOUR THE BEST MARK WHEN YOUR SLEEPING LOL

aren't we all

Hi Mark,
I have a non RC related question for you.
I have an air cooled 50cc 2-Stroke Vespa. It goes pretty good with the mods I have done, but I was considering opening the engine and having a bit of a go. There are plenty of aftermarket piston and liner and carb options, but I was wondering what potential the original has?
What experience do you have in this area?? Go-Karts would be similar? Also I was wondering if you did bulk methanol (not road use of course) as a fuel for my little beastie. It should help to keep it cool yeah?

The Vespa people are reluctant to play with it for fear of it blowing up, but I can justify that risk.

PM if you can help out.

Regards,

and here i was always assuming you were a push bike fanatic

I would like to say thanks to Mark for his ongoing support of the Charity Challenge. With the help of the Massive sponsorship we raised $3877.00 for the kids. Who says Aussie shops dont support race events, thanks again.
Cheers Steve OConnor & Merry Xmas.

Tried a Vespa on Nitro in the late 60's
Blown the head off and the head bolts punchered the cowlings

Should have reduced the compression a bit i guess

It flew for about 3 minuites before it went OFF

Id probably look at pipe and carb up grades before playing with the motor. most 2 strokers wake up nicely with a good performance pipe...once you have done that you could get a worked sleeve to change the timing. Yes we sell bulk methanol $1.60 a litre

Hey Steve

It is my great pleasure to support the efforts of PDNR. there is a lot to be said about a club that puts so much effort into helping those less fortunate.

Any time you need my help im there !

Cheers MM

Hey HPNitro goers !

IT has come to my attention that i have never really addressed another mystery... " GLOW PLUGS"

What plug do you use for what engine ?, what plugs suit what conditions ?, Whats a good plug for my fuel ?

Ill be addressing these questions briefly and simply.

OK the plug acts obviously as an ignition system that is called " an energy perpetuated ignition system" meaning that every bang and spark generates heat and keeps the plug coil hot. So really we are relying on this un assisted ignition to keep our engines going.. its no wonder they flame from time to time. Its a delicate balance ...

OK so lets do a simple test

Start your engine and leave the ignitor on the plug. Let it run for about a minute to warm up. Listen to the idle and take off the ignitor. What happened ? if you noticed the idle drop then there is a good chance your plug is too cool ! ( provided the engine is tuned properly) Whats happened is the energy from the ignitor was removed and cooled the plug retarding the ignition. it could also mean you are running rich... youll have to determine which one .. Massive !

This is one simple test to do.

But a rule of thumb you can all follow is the following

less nitro = Hotter PLug
More Nitro = Cooler PLug

So lets look at the Rossi range of plugs, bcause they are easy to follow.. with low nitro you would use a # 5 plug say 15% 15 to 20% use a #6 ( slightly warmer ) 25 to 30 % nitro use a #7 .. Besides the cooler plug retarding the ignition slightly it also has another purpose. Cooler plugs generally have a thicker element, the thicker element is also more resiliant to higher impact explosions made by higher nitro. But in my opinion i always like to use a med to hot plug no matter what , cool plugs just dont work for me .. some people do like them but i dont.

Advantages of warmer plugs are they idle better and are harder to flame out.

Dis advantage they are a little more fragile..

Does the heat range of the plug make the engine run at a different temp ? No it makes no difference except for one thing, a hotter plug will in most cases let an engine run harder therefore running hotter. it would seem the plug makes the engine hotter but its not, its like running a body without ventilation , it makes the engine run hotter but the body causes the symptom because it has changed a determining perameter... ( i hope that makes sense : )

Ok now long body and short body plugs.

Simple really a short body plug increases geometric dome size reducing compression. A long body does the opposite, it reduces geometric dome size increasing compression.

So long body = beter power = hotter engine
Short body = Less performance = cooler engine

Ahaaaa ! you said the plug makes no difference to the temps ! Well the heat range of the plug dosent but the physicality of its dimensions does. its + or - a determining factor of how the enigne runs. But all this is un true really ...... WHA ? ....

Whats really happening is a higher geometric compression will increase heat conductivity to the head button and release heat transfer via the heat sink more efficiently thus giving the impression the engine is running hotter for all you temp gun freaks out there... The reverse is true when you decrease geometric compression. This also applies to reducing head clearence, the engine will transfer more to the head as opposed to through the side walls and pipe. Remember the head button is aluminium and ally likes to absorb heat and dissipate it usually toward a cooler direction, towards a cooling head..

Confused ? Dont be , if we were to analise how the brain works im sure some of us, including me would get head aches.. lol

Hope this helps in chosing plugs

My faves to use

Rossi #5 and #6
McCoy MC59 and 9
LRP 6T or 3

If anybody has some interesting plug stuff to post we would appreciate the info !

Hope this helps !

Cheers MM

merry christmas einstein!

i'll finish the epic, chapter 2, after the new years break

when is the next bloody livo buggy race man! i need a fix!

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.

This info is courtesy of AFM.

Also, the heat range of the plug alters the timing. A hotter plug will ignite earlier in the cycle than a colder plug. This effects power delivery. All things being equal, a hotter plug will usually make more bottom end grunt than a cold plug, and vice versa.