Miller Cycle

[Dave Williams]

-> I was also wondering if grinding cams to give a miller
-> cycle is an option for modifying cars to run superchargers,

 You can do it without the supercharger.  Crower Cams used to sell a kit
about 15 years ago called the Crower Mileage System.  Came with a set of
14:1 CR pistons for a small block Chevy and a cam with a long duration
intake lobe, dropping the trapped CR to something like 9:1.  The idea
was to reduce the amount of induction charge while maintaining the
original power stroke.  It worked so-so, mainly due to the strong
reversion pulses sending confusing signals to the carburetors of the
day.  Hot Rod Magazine built one of the Mileage System motors for a
street rod project and didn't get much better than stock mileage out of
it, but they were running an Edelbrock S.P.2.P. intake and a tiny 350CFM
Holley two barrel carb.  They had fuel standoff out the top of the carb
due to the strong pulses, but nooo.... the editors weren't bright enough
to figure they needed an intake with a big open plenum like an Offy 360
to keep the carb from going full-rich all the time.  <sigh>

 Anyway, there was nothing wrong with the basic idea, though Crower
stopped selling the setup after a couple of years.  Mazda just blew the
dust off and re-marketed it.

 With a modern speed-density EFI it'd be a piece of cake.  You'd have to
find some way keep a MAF from being freaked by the reversion pulses,
which the Mazda's blower does quite handily, come to think of it...

====dave.williams at chaos.lrk.ar.us========================DoD#978=======
  can you help me...help me get out of this place?...slow sedation...
ain't my style, ain't my pace...giving me a number...NINE, SEVEN, EIGHT
==5.0 RX7 -> Tyrannosaurus RX! == SAE '82 == Denizens of Doom M/C '92==