TEST THE FIT of a Nitro RC Racing Engine:
25 years ago, I was told of the way an accomplished rc racer tested his engines to determine if they had The Perfect Fit. Since he was by far, the BEST MODELER in the USA at that time, I listened.
Now to the way to test the fit of the piston/liner, to see if you have a great fit and seal.
After assembly of the the engine I apply a drop or two of "silicone platelets" to the piston surface. The Teflon Platelets is available at Boca Bearings as (Midas Touch Lubricant) After I turn the engine over several times to coat the piston and imbed the Teflon Platelets slightly, I put in some methanol to clean out most of the oil residue.
I put in the Glo Plug in the engine. The way that I test the engine for seal is by rocking the engine back and forth over top dead center with the flywheel. If you can't rock it back and forth over top dead center without loosing the seal and leaking down for at least 20 bumps, you don't have a good fit.
After you find that you have an engine with the great fit, run the engine in your model. Get it VERY WARM for a short period of time. Then run the engine rich for a short period, then run VERY WARM, etc. Several cycles like this will allow the metal of the piston and liner to find their set and you should have a GREAT ENGINE.
It is a good idea to re-try the bump test AFTER you run in the engine to make sure that the seal lasts.
This test will be one of the best tips you will ever learn and will accurately predict the success of your engine build.
The fit is "Far More Important" than any timing numbers or ANYTHING ELSE, and will be your primary indicator of great performance.
This test takes into consideration the liner/piston roundness, the seal of the liner to the case, and the seal of the head to the liner.
Invite your friends to join our Mailing List on the http://Engine-Analysis-Software.com webSite and get periodic technical notes.
YOU HAVE JUST RECEIVED THE MOST IMPORTANT TIP IN BUILDING ANY NITRO PERFORMANCE MODEL ENGINE !!!!
Marten (Marty) Davis
Owner - Engine-Analysis-Software.com
Many Time National Champion
IMPBA Member of IMPBA Hall of Fame
Many National IMPBA Speed Records
25 years ago, I was told of the way an accomplished rc racer tested his engines to determine if they had The Perfect Fit. Since he was by far, the BEST MODELER in the USA at that time, I listened.
Now to the way to test the fit of the piston/liner, to see if you have a great fit and seal.
After assembly of the the engine I apply a drop or two of "silicone platelets" to the piston surface. The Teflon Platelets is available at Boca Bearings as (Midas Touch Lubricant) After I turn the engine over several times to coat the piston and imbed the Teflon Platelets slightly, I put in some methanol to clean out most of the oil residue.
I put in the Glo Plug in the engine. The way that I test the engine for seal is by rocking the engine back and forth over top dead center with the flywheel. If you can't rock it back and forth over top dead center without loosing the seal and leaking down for at least 20 bumps, you don't have a good fit.
After you find that you have an engine with the great fit, run the engine in your model. Get it VERY WARM for a short period of time. Then run the engine rich for a short period, then run VERY WARM, etc. Several cycles like this will allow the metal of the piston and liner to find their set and you should have a GREAT ENGINE.
It is a good idea to re-try the bump test AFTER you run in the engine to make sure that the seal lasts.
This test will be one of the best tips you will ever learn and will accurately predict the success of your engine build.
The fit is "Far More Important" than any timing numbers or ANYTHING ELSE, and will be your primary indicator of great performance.
This test takes into consideration the liner/piston roundness, the seal of the liner to the case, and the seal of the head to the liner.
Invite your friends to join our Mailing List on the http://Engine-Analysis-Software.com webSite and get periodic technical notes.
YOU HAVE JUST RECEIVED THE MOST IMPORTANT TIP IN BUILDING ANY NITRO PERFORMANCE MODEL ENGINE !!!!
Marten (Marty) Davis
Owner - Engine-Analysis-Software.com
Many Time National Champion
IMPBA Member of IMPBA Hall of Fame
Many National IMPBA Speed Records
About the Author:
Even if you don't have a tom of Nitro Engine Building, it is SUPER EASY with Nitro Engine Analysis Software. You can look over the shoulder of the BEST engine Builders in the USA. Build your Engine! You can get a unique content version of this article from the Uber Article Directory.
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