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Old 12-05-2010, 04:00 AM   #1
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Default whats the best way to break in 21 on road engines from new

Hi people I'm goin to get a 21 engine for my 1/8 ic on road just wanted to know the best way of running engine in.Is it better to run in on track?

Thanks people
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Old 12-05-2010, 05:11 AM   #2
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Hi people I'm goin to get a 21 engine for my 1/8 ic on road just wanted to know the best way of running engine in.Is it better to run in on track?

Thanks people
It would definitely be better to do it on a track, when there are little to no people on it. Just keep temps up, nice and rich and go through the rev ranges for about 8 tanks, but this varies from person to person.
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Old 12-05-2010, 05:17 AM   #3
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There are 1001 topics about running in, search them and read them all to see that all methodes will work.....

The heatcycle is the most common

We have several heads to control the heat, you can start with removing the head and start running rich with only the buttonhead on 100 degrees celcius and mount the head back again after 2 or 3 tanks.
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Old 12-05-2010, 07:37 AM   #4
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i start off by putting 2-3 drops of after run oil thru the button head, then the move piston up and down back to bdc..next i use the heat gun til it reach 100-120 degrees then start it up and run it rich but the the first tank i let it idle on the ground after that next tanks then i do figure 8's in a parking lot
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Old 12-05-2010, 07:40 AM   #5
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Hi people I'm goin to get a 21 engine for my 1/8 ic on road just wanted to know the best way of running engine in.Is it better to run in on track?

Thanks people
http://murnanmodified.com/breakin.php

This is how we do it.
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Old 12-05-2010, 09:16 AM   #6
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Old 12-05-2010, 07:18 PM   #7
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Thats how I did my RB T10, but only recently I realised how important it is to keep the temps up.
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Old 12-05-2010, 10:49 PM   #8
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My style :

1. I put another 0.30mm shim to lessen the compression

2. 5 tanks break in on the bench, and keep temperatures around 80 - 90 C

3. 5 tanks break in on the circuit, and start closing the hsn on the last two tanks.

4. I remove the shim after two race meeting.
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Old 12-05-2010, 11:07 PM   #9
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Originally Posted by kyoshoevolvam3 View Post
Hi people I'm goin to get a 21 engine for my 1/8 ic on road just wanted to know the best way of running engine in.Is it better to run in on track?

Thanks people
Actually I would run it at track but With People so you can ask around for tips and assistance! Good luck
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Old 12-06-2010, 12:30 AM   #10
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Thanks for your help when u say break in on bench do u just keep car idle or slightly rev throttle as its on bench this is what I don't understand.

Thanks
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Old 12-06-2010, 12:57 AM   #11
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Thanks for your help when u say break in on bench do u just keep car idle or slightly rev throttle as its on bench this is what I don't understand.

Thanks
Bench means on a stand/off the ground! Let it sit at idle no need to have to keep remote on once you everything is idling normal and smooth
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Old 12-06-2010, 04:06 AM   #12
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Default Nothing worse than hearing a piston screech against the liner

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Originally Posted by kyoshoevolvam3 View Post
Thanks for your help when u say break in on bench do u just keep car idle or slightly rev throttle as its on bench this is what I don't understand.

Thanks
Nothing worse than hearing a piston screech against the liner, you run a richer mix so higher revs needed to keep the engine temperature up enough to prevent the screeching.

The engine thread has sticky break in tips.. read them first.

So give it airflow too. Why many put props on.
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