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Tracy's is on the intake/exhaust side
of the engine; the intake tubes are a straight shot from bellmouth
to engine block. Everyone seems to go for the PL inspired 19"
length tubes (or even longer, to find a spot on the plugs side of
the engine for the plenum. I wonder if that's part of the reason
(along with the drag of 'snake-y' tubes) that some aren't getting
the HP they hoped for.
Note: If you build a 'cigar box' style plenum (air box) with flat
sides, don't make my mistake. Tracy's box is made of plywood for a
reason; I got creative & made mine using aluminum and Tracy
pointed out that the pressure pulses will quickly shred it.
Rebuilding my plenum is on my 'to do' list. I've got some 6"
aluminum tubing that I may use, but the simplest thing is to just
build it with plywood.
On 6/14/2016 1:38 PM, William Jepson wrote:
Something to remember an airbox like that must be
on the "cold side" of the engine. Don't put it over the
exhaust.
Bill
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