Okay, I'll skip the aluminum, but....
Fiberglass....Carbon fiber......could be an alternative over
plywood. As a composite I can form a stronger cigar box at a
fraction of the weight.
Terry Adams
N51079
KSCK
On 6/14/2016 2:15 PM, Charlie England
wrote:
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