Posted by Matt Wilson [22.214.171.124] on Tuesday, March 05, 2019 at 23:12:51 :
On other forums, I've seen several mention of a 50-hour test that Chrysler used to conduct on its engines. It's been said that such testing is discussed in a particular book written a couple decades ago (I think?). To those who have read that book, does it say in what era this testing took place? By that, I mean, do we know that flathead sixes of the design used in our vehicles underwent such testing? I see discussions that make me think so (certainly the people posting the info think so), but I'm wondering if the book was that specific as to state the era when such testing was done. Has anyone ever run across any examples of this data, or a source that provides any kind of detailed description of the test and its outcomes? Maybe that book provides some detail. I find this type of information interesting and wonder if anyone can offer up anything.
I found info online from a Chrysler engineer who said that the hemi-six development engines (developed in the 60s) were tested under a graduated schedule consisting of 10 hours at 800 rpm, followed by 10 hours at 1600 rpm, then 10 hours at 2400 rpm, 10 hours at 3200, 10 hours at 3600, then 9 hours at 4000, and finally 1 hour at 4400 rpm, all at wide open throttle, which adds up to 60 hours. I'm wondering if the 50-hour test was similarly conducted on an rpm schedule, or at 3600 rpm continuously, as is often mentioned in those posts I've read.
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