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  #25  
Old 03-27-2011, 09:00 PM
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Re: What's The Best Way To Break-In the Hemi ??

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Originally Posted by Dan JGC View Post
How can you NOT go faster than 50 MPH during the first 300 miles...it's a HEMI!!! My GC wouldn't let me go slower than 50 MPH on the Interstate....heck it wanted to cruise at 80 MPH.....

What I gather is that you should make sure the RPM's vary more than usual during the first 300 miles and to do some short duration WOT on some highways too to get the full range. Right?
Yeah, ditto. I tried to stay under 55 but it was not happening on the freeway.
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Old 03-27-2011, 09:03 PM
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Re: What's The Best Way To Break-In the Hemi ??

I always drive my vehicles off the showroom floor like I stole it. lol
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  #27  
Old 03-27-2011, 09:10 PM
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Re: What's The Best Way To Break-In the Hemi ??

Here's a link. . . http://www.mototuneusa.com/break_in_secrets.htm
Guaranteed to start more arguments than oil, tires, or calibers!
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Old 03-27-2011, 09:10 PM
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Re: What's The Best Way To Break-In the Hemi ??

Just went for an hour plus drive trying to vary the rpms and then took it on I-95 express lane to do about 7 WOT which is hard to do for very long from about 60 MPH without getting to 90 MPH quickly...maybe 2 seconds at a time? Anyway nothing blew up...and I had fun...no ticket.
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  #29  
Old 05-03-2011, 11:27 AM
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Re: What's The Best Way To Break-In the Hemi ??

Just caught the end of a discovery program on the Chrysler engine plant.
They said every engine is tested on a dyno, and as they showed the first start on the 5.7 hemi you could see the rev gauge it went strait to 5200rpm.
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Old 05-03-2011, 11:46 AM
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Re: What's The Best Way To Break-In the Hemi ??

I have built a few motors over the years. Build it, fill it with fluids, start it and check for leaks, shut it down and change the oil, start it and beat the hell out of it like you normally would.

I don't think taking it easy on a motor is good for it during the first few runs.

Even on my 2-stroke dirt bike, I do this. After a piston and rings it goes right to the woods for a beating.
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