I've been trying to find the formula that roughly calculates out the

tbo of

an engine based on power output. I don't think its that accurate but I'm
curious to see what the results are. As an example if the original

rating

was 150 hp and the engine was good for 1000 hours how long would it

last at

450 hp?  I think its would be about 100 hours if I remember how it

worked.

Does anyone remember the way to estimate this?

Dave

Bill Freeman wrote:

No way to get there with a simple rule of thumb.  Too many variables.
Not worth spending any time on.   Only actual field experience will count,
and then you need to copy all internal parts exactly, lube type, load
conditions,
etc. to be of value.

Bill Freeman

As I mentioned this was an old rule of thumb, not necessarily accurate but
a rule of thumb.
I know I've seen it mentioned in texts and the odd magazine.  I think it
had more to do with
race prep'd engines than anything else. The problem is the last time I
recall seeing it has to
be 20+ years ago.  Not a problem just figured someone on this list would
have known the theory.

Dave

 
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