1980 Savanna
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Senior Member
Joined: Jan 2003
Posts: 352
From: New York Long Island
to infinity & beyond, me
Joined: Aug 2001
Posts: 5,124
From: santurce
Originally Posted by 730RWHP12A' date='May 17 2004, 12:53 AM
nope, they came with n/a 12a motors
and the hatch is mariah flavor
and the hatch is mariah flavor
never was a fan of the hatch. but i like the car. wonder if its legal to drive.
Senior Member
Joined: Oct 2003
Posts: 348
From: outside chicago now...soon orlando,fl again
Originally Posted by treceb' date='May 17 2004, 06:23 AM
and 12a six port. or was that the cosmo??
never was a fan of the hatch. but i like the car. wonder if its legal to drive.
never was a fan of the hatch. but i like the car. wonder if its legal to drive.
to infinity & beyond, me
Joined: Aug 2001
Posts: 5,124
From: santurce
see...
"Mazda had been working hard at improvements for the 12A. First of these was the 12A-SPI or six-port-induction engine. Imagine the Honda V-TEC variable timing system and the SPI engine was the rotary equivalent. So how did it work?
Placed above the secondary ports at the front and rear plate was an auxiliary port kept closed by a revolving cylinder. At a predetermined rpm, exhaust pressure pushes a diaphragm to spin open the cylinder and open the rotor to a third port for induction."
http://www.fastfoursvip.com/articles....aspx?view=243
"Mazda had been working hard at improvements for the 12A. First of these was the 12A-SPI or six-port-induction engine. Imagine the Honda V-TEC variable timing system and the SPI engine was the rotary equivalent. So how did it work?
Placed above the secondary ports at the front and rear plate was an auxiliary port kept closed by a revolving cylinder. At a predetermined rpm, exhaust pressure pushes a diaphragm to spin open the cylinder and open the rotor to a third port for induction."
http://www.fastfoursvip.com/articles....aspx?view=243