Thanks bigmatt for pointing me in the right direction with my tuning issues that were burning out glow plugs after 10 minutes.
I followed settings and tweaked from there.Still getting plenty of smoke and running much stronger.
thanks again......gosharpie97.

P.S. -Gonna hold on to engine for a while,but YOUR first on list when I sell.
LOL.

My GO GX-5R also ran good, at the Round #2 of the MNRC Series Race.

http://i230.photobucket.com/albums/e.../photo-1-1.jpg

I LOVE THE 3 PORTS!!!!!!!!!!!!!!! Not as fast and powerful as my MG-66'S but modded they are great engines. Also I can't remember what pipe your using,but a dynamite 086 really perks it up. Good luck,glad I could actually help.

Crankshaft Epoxy ram
 

I'm trying to squeeze as much as possible out of this nice 3PT Racing... the sleeve already got some nice ports on it.
Fill some epoxy in the crankshaft... do you all do this mod?
Am i filling too much?
will try the engine on this weekend...

On my 7 port i was only getting about the same, a little higher after a hard run. Just retune the motor. Go to the tuning guide and follow that, Than see how it runs. Dont worry about temp just get it so it runs good and has smoke coming out of it

Any of the GO dudes attending the RC PRO Series Florida this saturday at Fort Lauderdale ?

Im in USA for job assignment, just 5 days and i got my car with me to hang out at the track, will be arriving to the track just saturday right before qualies ... would love to put some faces on the forum texts ...

cya !

looks like you just added epoxy. The reason cranks are epoxy ramped (silicone) is because you drill them out to lighten them and add a lighter filler. Hard to do without a mill or lathe.

Rex

http://i424.photobucket.com/albums/p.../gocrank-1.jpg

thanks for letting me know... :D
yup...no lightening process, i just added epoxy to make the ram, i thought its for better flow of the fuel. no? i thought i saw a few top race engine got epoxy as a ram...

Those are also lightened and then ramPed. A "ram" would be more of a scoop out side the engine, forcing more into the carburetor. The technique has more to do with removing excess metal and then providing a more linear line for the fuel/air mixture.

You cannot push mixture, a ramp does not aid flow in any way at all, if anything it disrupts flow...... mixture always takes the shortest path naturally, it cannot be pushed or pulled...... The filler in the crank just reduces crankcase volume and nothing else....

using this logic, port size, number, design, and surface smoothness would have nothing to do with airflow. This is incorrect.

No its not ! LOL

mixture takes the shortest path... the closer you can make that path to a straight shot the better...removing obstruction from the path is all you can do....you cannot push a gaseous mixture, a ramp does not guide the mixture, all a ramp does is fill empty space which decreases crankcase volume, which increases crankcase pressure on the pistons downstroke, which aids in the transfer of mixture from the crankcase tot he combustion chamber.....

Once again the mixture naturally takes the shortest path, from high pressure to low pressure...we cannot guide the mixture, all we can do is give it an easier route... removing any bends in the shortside radius is far more effective then trying to add material to the outside radius !

However since we cannot help but for the mixture to make contact with surfaces inside the engine, we can reduce the surfaces interference by slightly texturing the surface...A textured surface actually flows better then a smooth surface ! 220 grit finish flows better then mirror smooth !

That crank in your pics is an OS Speed crankshaft. It is drilled and THEN filled as 22racer said. The drilling is what does the real magic in that it lightens the crankshaft making throttle response more crisp. The epoxy just fills the empty void created by drilling, and brings crankcase volume back to what it was before the drilling. Simply adding epoxy to the crank ramp will not do anything other than further decrease case volume and slightly obstruct the flow of fuel/air mixture if you go too far with it.;)

then why do people who build full size race motors spend so much time port matching and polishing intake runners on race motors?? :rolleyes:

in this case, both aerodynamic and fluid dynamic laws apply here. Smooth surfaces have less drag coefficient, due in part to reduced turbulence generation and reduced exposed surface area. The only advantage that a less smooth surface could provide would be increased atomization. Due to the velocity of the air moving through the engine at operating speed, this is a moot point. The vaporization point of nitromethanol in a vacuum environment (carburetion) is typically below the operating temperature of these engines anyways. This will vary, based on lubricants and additives.

Lastly, from the point of entry (carb venturi) to the cylinder, the fuel/air mixture is under vacuum. That is unless you're running forced air induction (supercharger). So, the mixture is being pulled- not pushed.