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#1
06-08-2006, 06:46 PM
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I'm Itching...
No not like that. I now have a grand total of 215 miles on my fresh rebuild. How many break in miles did you put on before your first smoke show ?
Glen. |
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#2
06-08-2006, 08:05 PM
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There is no such thing as a brake in period. As long as you make sure your cam is broken in correctly and everything is right, you can hammer it at will. When I build a new race motor I don't "brake it in" I just do my burn out and run a full out 1/4 mile, and that's how it done. Braking in is for broke back cow boys.
Tim C
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Tim Corcoran |
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#3
06-08-2006, 10:10 PM
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thats funny tim.....
 many of us dont get the chance to "break in" a bunch of motors. its good to hear that if everything is right then go ahead and use it !!! it is easy to live in fear of expensive damage......
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1981 Trans Am project -YJ 400 stroked to 488 CID-74cc Eheads-10.95:1-Northwind Intake-Holley Terminator-TH400-3:55 Moser rear-Dougs Headers.... |
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#4
06-09-2006, 01:53 AM
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I tend to err on the side of caution.
I run a fresh motor easy for the first 500 miles. This should seat any troublesome rings, etc. My thinking is that if a new engine is going to come apart, maybe I could catch it and shut it down at low speed before it scatters. I did this once with a 235 six in a Bel Air. I lost the oil pump at low speed, and was able to cut it off and save the engine from serious damage. But if the engine is healthy, you should be able to hammer it within reason. A sick motor will come apart either way, but if you're cruising you can shut if off. If you're in the middle of first with the tires smoking, you wont notice the gauges until the crankshaft is re-entering earth's atmosphere at a high rate of speed. And you're first thought is: " Where did that hole in my hood come from?" good luck chip
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I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
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#5
06-09-2006, 03:42 AM
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i like to put some miles on one before hammering it. i know it's always been a very opinionated subject, but i just like to give things a chance to seat in, and get a feel for the thing first....things such as possible detonation, etc.
i also have a couple hundred miles at most on my new roller 455, and i'll put some more before i really hammer it. i have melted a lot of rubber already without even really getting into the secondaries though...about 4,000 RPM max so far
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#6
06-09-2006, 06:12 AM
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250 miles is more than enough! Go flog it!
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Darin '64 Bonneville Wagon (sold) 69 Lemans-All motor (sold) 9.81 @ 136.39MPH |
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