auto2

Ok I'm a little confused;

1) for a new engine it must be really rich.( so there is enough oil to lube and wash junk away and cool it)

2) engine must be at operation temp while your breaking it in.( lets say 220 degrees)

3) can't rev up the engine or work it hard.

so I have a new out of the box engine. without touching the factory setting I drive the car in circles maybe 1/2 throttle ( bliping it a lot) for a full tank.
But the engine temp is only 130 degrees.

I need the temp at least 200.

NOW do i lean it out to get the temp in range? NO supposed to be really rich.
do I cover the fins?
heat up the engine with a heat gun first?

anyway I think you get my point so I'll stop babbeling.
what do you'all do?

MadTripper

I would lean it out until you felt you are in the proper temp range. The settings from the factory are general and will need adjustment depending on your physical location.


Tripper

Digimortal

I'm curious about this too. I think there should be a sticky thread on how to correctly break in an engine for unexperienced people. There may already be one somewhere on this website but have not found it. For breaking in an engine, I used to just run it rich for the first 5 tanks but this was years ago. Now people are saying there are all kinds of ways of breaking in an engine, so now I am not sure. I'm sure someone here will be able to answer this question.

auto2

point being it MUST be at operating temp.( so all pieces have expanded to their running size)
all this talk about rich,rich,rich, but if ti ain't hot enough your waisting your time.(agree?)

auto2

BTW what started all this was I was at mt friends house ( an expert addicted racer)
and he said my main jet was WAY to lean ( .
but he is full throttle racing all the time.
I'm brand new and just driving around the block.
So in order to get my temps up to break it in I had to lean it out.

think it would be better to control temp by blocking off the fins?

Billyman

My Feedback: (1)

Jeebus, listen, temps have little to nothing to do with engine break-in unless for some reason you’re running too hot. When an RC engine is in “break-in� mode, it won’t go, it’s actually pathetic. There’s a darn good reason the manufacturer doesn’t want you run at WOT during break-in.

Just follow the manufactures instructions for the break-in procedure before monkying with any carb settings.

Aterlatus

Give it at least one tank, preferably more before you start to lean it out. Break in is basically what it sounds like - it's making sure all your parts fit together like they should, and putting that right where there's slight (thousands of inches) manufacturing differences...

You'll notice that TDC is ***VERY*** tight in a brand new engine, to the point where if the engine's stopped there you have great difficulty in getting it moving again (spoken from experience). Breaking starts to loosen things up a bit.

The parts in your engine actually contract when they're heated, so running the engine at high temps straight away isn't going to break it in properly (that's how your piston gets stuck - make sure you're not at TDC when you let the engine cool!).

If I've made no sense, then ignore me. It's 7:56AM and I've still not been able to sleep :P

auto2

metal expands when it gets hot. If you break it in cold then when it gets hot it will be loose( like no compression)

Do an experiment.
turn over a new cold engine.put it in the freezer first:-)
then heat it with a hair dryer and see what happens.

A engine must be broke in at the temp it is designed to run at!! right??

Aterlatus

Meh []

rclooney

I don't realy go on exact temps. If i can touch the head for more than 2 seconds, it is too cold. if i burn my self instantly, its too hot.. if i can hold it for around 1-2 seconds it is right for break-in. both my engines were run-in like this and they work fine.

Aterlatus

But I'm guessing your fingers don't?

rclooney

it is hard to drive with burnt fingers