Mazda K engine

K8

The 1845 cc K8 is among the smallest production V6 engines ever; and also the first K-series engine to be used in a Mazda car (in the Mazda MX-3). It was a DOHC 4-valve design with VRIS and a bore and stroke of 75x69.6 mm. It produced 130 hp in US trim (sometimes referred to as "K8-DE"), and 135 hp in Japanese trim (the "K8-ZE") on introduction in 1991 and 144 hp and 115 lbft at its best. The displacement was held under 2000cc to minimize the annual Japanese road tax obligation.

Applications:

• Mazda MX-3
• Eunos 500

KF

• 2.0 L KF - 1995 cc 78x69.6 mm bore and stroke - The 2.0 L KF engine was available in various states of tune. The KF-DE produced 140 hp and 132 lbft and later on 144 hp and 132 lbft. The JDM version KF-ZE engine produced 160 hp and 132 lbft. The Lantis Type R variant produced 170 hp and 140 lbft.

• 1991-1997 Mazda MX-6

• 1992-1993 Eunos 500, 160 hp 180 Nm

• 1993-2002 Eunos 800

• 1992-1998 Efini MS-8

• 1993-1999 Xedos 6

• 1993-2002 Xedos 9

• 1993-1996 Mazda Lantis Type R 170 hp (124 kW; 172 PS) 190 N•m (140 lb•ft)

• 1994-1996 Mazda 323f V6 GLX

• 1996-1998 Mazda 323f ZXi

• 1992-1995 Ford Telstar TX5 Ghia

• 1993-2003 Mazda 626 LX

KJ-ZEM==

The 2255 cc 80.3x74.2 mm bore and stroke, KJ-ZEM was one of Mazda's most technologically advanced engines. It employs the "Miller cycle" which uses a supercharger to increase compression efficiency by decreasing the compression losses (i.e., flywheel energy used to compress the intake charge in the cylinder); and thereby increasing the net power output of the V6. It was used in the T-platform cars. The supercharger used is the twin-screw type with electronic boost control. Power output was 217 hp and 210 lbft. The KJ-ZEM was on the Ward's 10 Best Engines list for 1995 through 1998.

Applications:

• Mazda Millenia S
• Eunos 800
• Mazda Xedos 9

KL

The 2497 cc KL family uses an 84.5x74.2 mm bore and stroke. It includes the Japan-only KL-ZE, which produced 200 hp and 165 lbft. Another variant, the KL-DE (also known as the KL-03 outside the US, and fitted to 2.5-litre Ford Probes) was the worldwide version, with 164-174 bhp in various applications. In 1998 a revised version of the KL known as the KL-G4 was used in the 626. It featured solid lifters, a cast crankshaft to reduce rotating mass and a reworked intake system. The distributor was replaced with a Ford EDIS coil-pack ignition.

Mazda introduced a key technology with these engines, known as the Variable Resonance Induction System (VRIS). A series of two butterfly valves coupled with electronically controlled actuators varied the volume and length of a resonant chamber within the intake manifold. The valves actuate at particular induction frequencies to produce optimal torque/horsepower output at any given engine speed. The valve operates to create three specific first-order resonant frequencies that increase cylinder air charge. All three resonances are used from 0 to 6250 rpm (6800 for the KL-ZE). Above that threshold, the first primary resonant chamber is again used, but at this engine speed the pressure wave from the second-order resonant frequency aids in charging the cylinder.

• KL-DE

  • 1993-1997 Mazda MX-6 LS (A spec)

  • 1993-1997 Ford Probe GT

  • 1993-1997 Mazda 626 ES, LX (after 1994)

  • 1995-2002 Mazda Millenia L

• KL-ZE
  • 1992-1995 Ford Telstar TX5 Ghia, TX5 Ghia 4ws
  • 1997 Mazda Capella Wagon
  • 1993+ Mazda 626 Jspec Sedan
  • 1993+ Mazda MX-6 Jspec
  • 1993+ Mazda MS-8 (Japan)
  • 1993+ Mazda Eunos 600/800 (Japan)
• KL-G4
  • 1998-2002 Mazda 626 ES, LX

References