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- Jul 21, 2015
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I'm ready to break in my new cmb v5. What is the best way to break in a new engine, percentage of nitro, what temp should I keep the engine at while breaking in?
Thanks
Thanks
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Run it in the boat, on the water at a rich needle.I'm ready to break in my new cbm v5. What is the best way to break in a new engine, percentage of nitro, what temp should I keep the engine at while breaking in?
Thanks
Any suggestions on percentage of nitro what should yhe engine temp beRun it in the boat, on the water at a rich needle.
Run conservatively with occasional 1 lap full throttle runs.
Do this running a couple of tanks of fuel through the engine.
What I do, works for me.
A good friend of mine and one of the fastest guys on the water, says, break them in the way yer gonna race em!
I like to go with my routine.
.45 crapshooterFirst step I would make sure you disassemble the motor and clean any burs/flashing in the ports of the liner, and make sure there is nothing there that shouldn't be. When reassembling I like to always put a drop of Castor or oil in any of the threaded holes everytime I put the motor back together. I would then set your head clearance to what you prefer, then start your break in method. Percentage of nitro is a personal preference I just like to make sure that the fuel I am running has 18% oil but that is just me. What boat are you going to be running it in?
Good deal, I run my head clearance at 8 thou, 60% nitro. Just make sure you go thru the motor.45 crapshooter
Terry, do you then put it in the dishwasher on HOT or lightly boil the piston to get the grit out and off the piston?
I have Dimond lapping and I am hear to tell ya.. you have to SUPER CLEAN the parts after.. or.. risk damage (I have ALWAYS got them clean)
Grim
I just hit them with Brakleen, the grit is so fine in the rubber matrix and you use it so gently that I don't think it transfers anything to the aluminum, the stick just gets a little darker.
The cone shaped points are also good for going around the ports to blend the chrome in slightly after getting the gobs off with a diamond file.
https://www.cratex.com/Products/Rubberized-Abrasives/Blocks-and-Sticks/Square-Sticks
These guys are good for small quantities:
https://www.moldshoptools.com/
View attachment 320436
Yikes!!I just hit them with Brakleen, the grit is so fine in the rubber matrix and you use it so gently that I don't think it transfers anything to the aluminum, the stick just gets a little darker.
The cone shaped points are also good for going around the ports to blend the chrome in slightly after getting the gobs off with a diamond file.
https://www.cratex.com/Products/Rubberized-Abrasives/Blocks-and-Sticks/Square-Sticks
These guys are good for small quantities:
https://www.moldshoptools.com/
View attachment 320436
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