In this case the owner does not have the choice, but the Mazda STAR racing
series uses only 4 port Renesis engines. Wish I were privy to the
decisions that went into that choice but I would guess that they were some of
the same ones that lead me to the same one. In any case, those
STAR racers go pretty good!
There is little doubt that the 6 port has more potential power.
It's just a case of choosing your priorities and whether you really need the
extra power. I'm looking forward to Bill's 6 port manifold project
results. We really do need a source of good light weight
manifolds.
Wish it were in real life, but I finally won enough "money" to buy the
Mazda 787 LeMans race car. Even though it's just a video game (GT4),
that is a hell of an exciting car to drive!.
Tracy (wishing for enough spare time to play GT4 more often :
)
----- Original Message -----
Sent: Wednesday, February 08, 2006 1:50
AM
Subject: [FlyRotary] 6 port?
I have never seen a race car (where the owner had a choice), run with a 6
port engine.
The 6 port works with high revs and a very complex tuned manifold.
Without the valving to transition between the RPM ranges, it will be a dog at
lower revs. Poor runner velocity and the like.
Save yourself a lot of pain and buy the 4 port. Simple manifolding, even
if you build it yourself.
All of the racing stuff works fine, if you want porting.
Look for 180-190 HP from the base engine with a big TB. If you really
need well over 200 at below 7,000 RPM buy the turbo now. Or learn to street
port. You will be surprised to find out that real airplane engines have
nothing close to their advertised HP. That 180 real dynoed HP of a rotary will
have you outrunning the real airplane engine powered stuff with the advertised
200 HP.
Lynn E. Hanover