To All-
Coming late on this "thread" as away on
company "trip" for the last four days (and
survived!! Again!! Amazing!!)
I believe completely in RR sessions for
"tuned" engines, as long as dyno operator
is also a skilled engine tuner.
There are dyno operators who know how
to run a dyno, who are NOT tuners!!
Beware the dyno operator who cannot
seem to figure out why your mixture
"drys out" under load/high rpm when fuel
jets are known to definitely be in the
"ball park"; such is a dead giveaway to
a dyno operator who is NOT a tuner, etc.,
and his "services" can be very expensive
in terms of "downline" damage!
Beware in this respect! Advice: go to
someone who is "known" (Peter Baldwin,
by example), geographic "inconvenience"
and/or "additional" expense be damned!
And, of course, plan ahead a bit, as
before one goes to the dyno, the engine
and ignition "systems" should be right
up to snuff; e.g., valves adjusted, new
plugs, points, rotor, cap, wires, etc.
Bring a couple of sets of jets for each
"circuit" (idle/progression, "mains" &
"air correctors" along with accelerator
pump jets, considering their possible
effect in the "WOT"/high rpm circuit,
or a selection of "needles" for SU types,
etc., though a shop which does a lot
of this type of work will probably have
"spares" lying about for all sorts of carbs.,
etc., along with a selection of "colder" or
"hotter" plugs of repute.
Usually the "good" shop also has a
distributor machine close at hand along
with an assortment of springs, etc.
And, of course, stick around to observe
without "looking over the guy's shoulder"
in a bothersome way; you'll learn a hellava lot, for sure. I found it
extremely
educational, to say the least.
Don't be too surprised, if you've made
"educated" guesses on jets, timing, plugs,
etc., that there might not be not very much more that can be done for
performance and/or economy with your
current set-up. If you've really done your
homework, there may be little room for
improvement.
Still, it's comforting to "know" through
objective testing that you not only know
your stuff, but that your engine is "tough"
as it is pretty much an even bet the RR
will be harder on your engine than you
would be under normal "street" circumstances; this knowledge, in itself,
is worth the dyno session, IMHO.
Cap'n. Bob
'61 :{)
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