: Doc,
: Are the power numbers from the Hot Rod Magazine
: articles from an engine dynomometer or a
: chassis dynomometer? I'm interested because
: I tried running a similar engine combination
: on Motion Software's Desktop Dyno, and that
: said that it should produce around 200
: horsepower or better. This makes some sense
: if the magazine info is from a chassis dyno,
: due to driveline losses (if I remember
: correctly, normally 15 to 25 percent
: right?).
: I want to use my desktop dyno to simulate my
: engine buildup, but if it gives me numbers
: that far out of whack, I really can't trust
: it for this engine combo. The desktop dyno
: doesn't claim total accuracy, but it is
: usually pretty close.
: Thanks, Mike Latvala

: just remember that when you load info on dyno
: its" garbage in garbage out" make
: sure your head airflow and carb airflows are
: correct also compression ratio are right on.
: i did dyno 2000 and came within 8 horsepower
: of actual.

:
: Doc,
: Are the power numbers from the Hot Rod Magazine
: articles from an engine dynomometer or a
: chassis dynomometer? I'm interested because
: I tried running a similar engine combination
: on Motion Software's Desktop Dyno, and that
: said that it should produce around 200
: horsepower or better. This makes some sense
: if the magazine info is from a chassis dyno,
: due to driveline losses (if I remember
: correctly, normally 15 to 25 percent
: right?).
: I want to use my desktop dyno to simulate my
: engine buildup, but if it gives me numbers
: that far out of whack, I really can't trust
: it for this engine combo. The desktop dyno
: doesn't claim total accuracy, but it is
: usually pretty close.
: Thanks, Mike Latvala

:
: The results were off a chassis dyno.
: I need to go back to the Dec. issue, I thought
: the last page or so discribed and showed
: some of the dyno testing.
: DD

:
: Mike,
: Thanks for your response. I have tried entering
: all the data as close as I can to the real
: world example. I am using an older version,
: Desktop Dyno version 2.5. Unfortunately, I
: don't have the exact cam timing specs, so I
: have had to 'guess' what they were. Also, I
: am using the most restrictive head
: configuration the program allows, which
: should be close the the slant six head.
: Other than the specific cam timing,
: everything I have is as close as I can get
: it. What were the cam timing events you used
: in your simulation? If anyone can provide
: the actual cam timing events (for any cam,
: not just the Clifford 276M), I would
: appreciate it.
: Thanks, Mike Latvala