Propure break-in

[Airpressure]

Airpressure’s break-in method: This is mainly for the small block engines, but works with others just as well.

1st tank: this is mainly a very VERY boring tank. You need to let it idle the whole time just about. Tap the gas about 10% every now and then. Your idle will most likely increase as the run goes on (since the piston and sleeve are loosing friction as it runs. If the vehicle starts too creep forward, don’t be alarmed its normal just steer it in the right direction.) Run this tank until it is completely consumed by the engine.

2nd tank: Try to let it idle half of the time and give it about 20% throttle half of the time. Let have about 2 second bursts of throttle (20% at max.) and then let it idle for 5 seconds. Do this untill the whole tank is consumed entirely.

3rd tank: Give the engine about 50% throttle for about 2 seconds then let it idle for about 5 seconds. Do this until the entire tank is consumed.

4th tank: 75% throttle for about 1 second then let it idle for about 7 seconds. Do this until the entire tank is consumed.

5th tank: 75% throttle for about 4 seconds then let it idle for about 5 seconds. Do this until the entire tank is consumed.

6th tank: accelerate to 100% throttle over a 4 second count then hole it there for 1 second then let it idle for about 5 seconds. Do this until the entire tank is consumed.

7th tank: 100% throttle for 2 seconds then to idle for 2 seconds. Do this until the entire tank is consumed.

8th tank: 100% throttle for a 4 second count then drop to 25% throttle for 1 second then drop to idle for 4 seconds. Do this until the entire tank is consumed. You are now done with break-in!

Don’t be alarmed by stalling, cutting out, sputtering, bogging, etc. it is just normal break-in pains.

Airpressure’s tips&tricks

[wheeledgoat]

my only experience w/ MT's so far is a Traxxas Revo (my first RC car, really) - and breaking in the 2.5R engine has been my only experience with break-ins... but it suprises me that general guidelines call for eight tanks of fuel? Traxxas' Break-In Procedure calls for 5 I think... what accounts for the difference?
note i'm not questioning the posted procedure; not at all - i'm completely ignorant and just fishing for info.. heheh

[Airpressure]

Well this way it assures your engine is completly broken-in.

[dnell]

The last year has seen Heat Cycling gain ground in the break-in procedures, when done properly, you can have an engine ready for the track in under 45 minutes.

Read this article very carefully:

www.rbmods.net/enginetempering.php

It should take 3-4 minutes to get an engine up to temp, (in the 200 range). If it takes longer then you're running too rich. Run it up, let it cool down til you can touch it then fire it back up again. I've used this method for the past few years on 6 engines with good results. The engine will get stronger and stronger until it dies. Around the one gallon mark there has been a jump in power that's quit noticable

There's not substitute for solid, fundamental practices when it comes to tuning and you should never attempt to tune an engine until the engine is up to temp.(above 200). the spit test will confirm if you're in the range.

Here's an article that's worth printing off and keeping in you tool box until those tuning skilz are all together.

www.rchobbies.org/cars_eng-tuning.htm